Margaret McLean Coulter Professor of Chemistry & Biochemistry
Nathan Hammer, Margaret McLean Coulter Professor of Chemistry
180 Coulter Hall
662-915-3989 | nhammer@olemiss.edu
EDUCATIONAL AND PROFESSIONAL BACKGROUND
Honors B.S. in Chemistry, University of Tennessee, 1998
Ph.D. Physical Chemistry, University of Tennessee, 2003
Postdoctoral Researcher, Yale University, 2003-2005
Intelligence Community Postdoctoral Fellow, University of Massachusetts, 2005-2007
Assistant Professor, University of Mississippi, 2007-2013
Associate Professor, University of Mississippi, 2013-2019
Professor, University of Mississippi, 2019-present
Faculty Research Development Fellow (UM Office of Research & Sponsored Programs)
Coordinator, Ole Miss Physical Chemistry Summer Research Program and NSF REU site
Coordinator, B.S. Chemistry Program
Coordinator, UM Chemistry Undergraduate Research
Chair (2010, 2011, 2015, 2018, 2021) of the Ole Miss Local Section of the American Chemical Society
PROFESSIONAL RECOGNITION
University of Mississippi Faculty Achievement Award (2021)
Margaret McLean Coulter Professor of Chemistry & Biochemistry (2020-2024)
Lambda Sigma Honors Society Excellence in Teaching Award (2019)
UM College of Liberal Arts Award for Research, Scholarship and Creative Achievement for Senior Faculty (2018)
UM Student Members of the American Chemical Society Faculty Award (2018)
Professionalism and Integrity Program Research Exemplar (U.S. Office of Research Integrity, 2017)
University of Mississippi Faculty Research Development Fellow (2017-present)
Ole Miss local section of the American Chemical Society Service Award (2012)
National Science Foundation Faculty Early Career Development (CAREER) Award (2010)
Alpha Omicron Pi Favorite Professor (2009)
RESEARCH INTERESTS
Spectroscopy, energy and charge transfer, physical properties and structure of single molecules and small clusters of molecules and ions
RESEARCH SUMMARY
When molecules interact noncovalently through hydrogen bonding or other electrostatic interactions, pi-pi interactions, or Van der Waals forces, their physical properties change. Although intermolecular interactions have received much attention recently at the ensemble level, the study of individual dimers, trimers and larger clusters (as well as binary and higher level interactions with other species) to reveal the intimate interactions leading to the bulk observables remains for the most part elusive. Here, we study the physical properties of interacting molecules in environments ranging from the single molecule to the bulk. Our spectroscopic capabilities include high resolution Raman spectroscopy of bulk materials, the study of size-selected clusters and aggregates in the gas phase using a mass spectrometer, and the use of single molecule techniques such as surface enhanced Raman spectroscopy and other laser-based spectroscopies to study single interacting molecular architectures. Such studies help answer long-standing questions involving the effects of intermolecular interactions on biologically relevant systems and also in developing devices incorporating conjugated organic molecules, to name a few examples. These studies will also allow for the tailoring of new nanoscale building blocks that would have physical properties dependent upon the number of molecules present.
EXTERNAL FUNDING
“Photoinduced Interfacial Charge Transfers with Organic Sensitizers using Low Energy Photons and Fundamental Physical Organic Design Concepts” (co-PI) National Science Foundation EPSCoR (CHE-1954922), September 2020 – August 2023
“REU Site: Ole Miss Physical Chemistry Summer Research Program” (PI), National Science Foundation (CHE-1757888), September 2018 – August 2021
“Center for Emergent Molecular Optoelectronics (CEMOs)” (Senior Personnel), National Science Foundation EPSCoR (OIA-1757220), October 2018 – September 2023
“RII Track-2 FEC: Feeding and Powering the World – Capturing Sunlight to Split Water and Generate Fertilizer and Fuels” (PI), National Science Foundation EPSCoR (OIA-1539035), August 2015 – July 2019
“MRI: Acquisition of a Raman Spectrometer for Research and Training at the University of Mississippi” (PI), National Science Foundation (CHE-1532079), September 2015 – August 2018
“REU Site: Ole Miss Physical Chemistry Summer Research Program” (PI), National Science Foundation (CHE-1460568), September 2015 – August 2018
“Modeling and Simulation of Complex Systems” (Senior Personnel), National Science Foundation EPSCoR (EPS-0903787), September 2009 – August 2016
“CAREER: Spectroscopically Tracking the Evolution of Noncovalent Interactions from the Single Molecule Level to the Condensed Phases” (PI), National Science Foundation Faculty Early Career Development (CAREER) Program (CHE-0955550), March 2010 – February 2017
REU Site: Ole Miss Physical Chemistry Summer Research Program (PI), National Science Foundation (CHE-1156713), September 2012 – August 2016
“Dynamics of Strand-Crossover Formation in Cadherin” (Co-PI), National Science Foundation (MCB-0950494), July 2010 – June 2014
PUBLICATIONS
For a complete list of the 100+ publications visit http://thehammerlab.com and click Publications, click here for a full cv, or click here to go to Dr. Hammer’s GoogleScholar page.
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2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011
2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 CV
K. Kapusta, W. E. Meador, I. Owolabi, S. A. Autry, J. Saloni, W. Kolodziejczyk, N. I. Hammer, A. S. Flynt, J. H. Delcamp, and G. A. Hill, “Ultra Bright NIR Sulfonate-Indolizine Cyanine- and SquaraineAlbumin Chaperones: Record Quantum Yields and Applications,” ChemPhotoChem (2022). DOI: 10.1002/cptc.202200127 (NSF OIA-1757220)
N. Dinesh, S. Bhattacharya, L. A. Hunt, S. Schwartz, N. I. Hammer, J. Jurss, J. Delcamp, “Designing Self-Assembled Dye-Redox Shuttle Systems via Interfacial π-Stacking in Dye-Sensitized Solar Cells for Enhanced Low Light Power Conversion,” Energy & Fuels (2022). DOI: 10.1021/acs.energyfuels.2c00633(NSF OIA-1757220)
D. Karunathilaka, R. M. G. Rajapakse, A. E. Hardin, T. M. Sexton, N. E. Sparks, J. J. Mosely, A. L. Rheingold, N. I. Hammer, G. S. Tschumper, and D. L. Watkins, “Correlation of Solid-State Order to Optoelectronic Behavior in Heterocyclic Oligomers,” CrystEngComm, 24, 4564-4572 (2022). DOI: 10.1039/D2CE00560C (NSF OIA-1757220)
E. C. Lambert, A, E. Williams, R. C. Fortenberry, and N. I. Hammer, “Probing halogen bonding interactions between heptafluoro-2-iodopropane and three azabenzenes with Raman spectroscopy and density functional theory,” PCCP, 24, 11713-11720 (2022). DOI: 10.1039/D2CP00463A (NSF OIA-1757220)
A. Dorris, N. E. Sparks, S. M. Vijayan, I. Chandrasiri, M. Farid Zia, N. I. Hammer, A. Flynt, and D. L. Watkins, “Effects of Nanoaggregation on Isoindigo-based Fluorophores for Near-infrared Bioimaging Applications,” Molecular Systems Design & Engineering (2022). DOI: 10.1039/D2ME00014H (NSF OIA-1757220)
E. C. Lambert, B. W. Stratton, and N. I. Hammer, “A Raman Spectroscopic and Quantum Chemical Investigation of the Pyridine-borane Complex and the Effects of Dative Bonding on the Normal Modes of Pyridine,” ACS Omega (2022). DOI: http://doi.org/10.1021/acsomega.2c00636 (NSF OIA-1757220)
R. N. Compton, N. I. Hammer, E. C. Lambert, and J. S. Hager, Raman Spectroscopy Under Liquid Nitrogen (RUN), Springer Series on Atomic, Optical and Plasma Physics (2022). ISBN: 978-3-030-99394-8
D. Nugegoda, L. Hunt, A. Devdass, H. Cheema, J. Jurss, N. Hammer, and J. Delcamp, “Lewis Acid-Lewis Base Interactions Promote Fast Interfacial Electron Transfers with a Pyridine-Based Donor Dye in Dye-Sensitized Solar Cells,” ACS Applied Energy Materials, 5, 1516–1527 (2022). DOI: 10.1021/acsaem.1c02912 (NSF OIA-1757220)
I. Chandrasiri, M. L. Yaddehige, B. Li, Y. Sun, W. Meador, A. Dorris, M. Zia, N. Hammer, A. Flynt, E. Davis, J. Delcamp, A. Lippert, and D. Watkins, “Core Cross-linked PCL-PAMAM Linear Dendritic Block Copolymers (LDBC) for Theranostic Nanomedicine,” ACS Applied Polymer Materials, 4, 2972–2986 (2022). DOI: 10.1021/acsapm.1c01131 (NSF OIA-1757220)
L. A. Hunt, R. Rodrigues, K. Foell, D. Nugegoda, H. Cheema, N. I. Hammer, and J. H. Delcamp, “Preferential Direction of Electron Transfers at a Dye-Metal Oxide Interface with an Insulating Fluorinated Self-Assembled Monolayer,” Journal of Physical Chemistry C, 125, 25410–25421 (2021). DOI: 10.1021/acs.jpcc.1c07981 (NSF OIA-1539035 and CHE-1954922)
D. Ndaleh, C. Smith, M L. Yaddehige, A. K. Shaik, D. L. Watkin, N. I. Hammer, and J. H. Delcamp, “Shortwave Infrared Absorptive and Emissive Pentamethine-Bridged Indolizine Cyanine Dyes,” Journal of Organic Chemistry, 86, 15376–15386 (2021). DOI: 10.1021/acs.joc.1c01908 (NSF OIA-1757220)
A. E. Wiliams, N. I. Hammer, and G. S. Tschumper, “Relative Energetics of CH3CH2O, CH3CHOH, and CH2CH2OH Radical Products from Ethanol Dehydrogenation,” The Journal of Chemical Physics, 155, 114306 (2021). DOI: 10.1063/5.0062809
S. Chatterjee, W. E. Meador, C. Smith, I. Chandrasiri, F. Zia, J. Nguyen, A. Dorris, A. Flynt, D. L. Watkins, N. I. Hammer, and J. H. Delcamp, “SWIR Emissive RosIndolizine Dyes and Nanoencapsulated in Water Soluble Dendrimers,” RSC Advances, 11, 27832-27836 (2021). DOI: 10.1039/d1ra05479a (NSF OIA-1757220)
L. A. Hunt, C. Curiac, M. A. Sabuj, Q. Li,A. Baumann, H. Cheema, Y. Zhang, N. Rai, N. I. Hammer, and J. H. Delcamp, “Probing Interfacial Halogen Bonding Effects with Halogenated Organic Dyes and a Lewis Base Decorated Transition Metal-Based Redox Shuttles at a Metal Oxide Interface in Dye-Sensitized Solar Cells,” Journal of Physical Chemistry C, 125, 17647-17659 (2021). DOI: 10.1021/acs.jpcc.1c05051 (NSF OIA-1757220)
T. Ranathunge, M. L. Yaddehige, J. H. Varma, C. Smith, J. Nguyen, I. Owolabi, W. Kolodziejczyk, N. I. Hammer, G. Hill, A. S. Flynt, and D. L. Watkins, “Heteroacene-based amphiphile as a molecular scaffold for bioimaging probes,” Frontiers in Chemistry, 729125 (2021). DOI: 10.3389/fchem.2021.729125 (NSF OIA-1757220)
C. Curiac, R. Rodrigues, J. Watson, L. A. Hunt, A. Devdass, J. W. Jurss, N. I. Hammer, R. Fortenberry, and J. H. Delcamp, “Iron Redox Shuttles with Wide Optical Gap Dyes for High Voltage Dye-Sensitized Solar Cells,” ChemSusChem, 14, 3084-3096 (2021). DOI: 10.1002/cssc.202100884 (NSF OIA-1757220)
A. E. Wiliams, N. I. Hammer, D. Reinemann, and R. Fortenberry, “Tracking the amide I and αCOO− Terminal ν(C=O) Raman Bands in a Family of L-Glutamic Acid Containing Peptide Fragments: A Raman and DFT Study,” Molecules, 26, 4790 (2021).DOI: 10.3390/molecules26164790
S. M. Parambath, A. E Williams, L .A. Hunt, N. I Hammer, and S. Chakraborty, “A De Novo Designed Artificial Metallopeptide Hydrogenase: Insights into Photochemical Processes and the Role of Protonated Cys,” ChemSusChem, 14, 2237-2246 (2021). DOI: 10.1002/cssc.202100122
B. Sajjadi, D. L. Mattern, N. I. Hammer, R. Shrestha, V. Raman, W.-Y. Chen, and Austin L. Dorris, “Double-Layer Magnetized/Functionalized Biochar Composite: A Microporous Structure for Environmental Applications,” Journal of Water Process Engineering, 39, 101677 (2021). DOI: 10.1016/j.jwpe.2020.101677
H. Shirley, T. M. Sexton, N. P. Liyanage, M. A. Perkins, S. A. Autry, L. E. McNamara, N. I. Hammer, S. Parkin, G. S. Tschumper, and J. H. Delcamp, “Probing the Effects of Electron Deficient Aryl Substituents and a π-System Extended NHC Ring on the Photocatalytic CO2 Reduction Reaction with Re-pyNHC-aryl Complexes,” ChemPhotoChem, 5, 353-361 (2021). DOI: 10.1002/cptc.202000296 (NSF OIA-1539035)
G. A. Verville, H. K. Byrd, A. Kamischke, S. A. Smith, D. H. Magers, N. I. Hammer, “Raman Spectroscopic and Quantum Chemical Investigation of the Effects of Tri-methylamine N-oxide (TMAO) on Hydrated Guanidinium and Hydrogen-Bonded Water Networks,” Journal of Raman Spectroscopy, 52, 788-795 (2021). DOI: 10.1002/jrs.6061
A. E. Williams, J. E. Davis, J. E. Reynolds, R. C. Fortenberry, N. I. Hammer, and D. N. Reinemann, “Determination of Vibrational Band Positions in Peptides,” Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 244, 118895 (2021). DOI: 10.1016/j.saa.2020.118895 (NSF OIA-1757220)
S. Dawood, A. Dorris, N. I. Hammer, and H. Rathnayake, “Synthesis, Characterization, and Photophysics of Self-Assembled Mn(II)-MOF with Naphthalene Chromophore,” The Journal of Physical Chemistry C, 125, 792-802 (2021). DOI: 10.1021/acs.jpcc.0c09600
S. Dawood, A. Dorris, N. I. Hammer, and H. Rathnayake, “Synthesis, Characterization, and Photophysics of Self-Assembled Mn(II)-MOF with Naphthalene Chromophore,” The Journal of Physical Chemistry C, 125, 792-802 (2020). DOI: 10.1021/acs.jpcc.0c09600
S. Vijayan, N. Sparks, J. Roy, C. Smith, C. Tate, N. I. Hammer, J. Leszczynski, and D. Watkins, “Evaluating Donor Effects in Isoindigo Based Small Molecular Fluorophores,” The Journal of Physical Chemistry A, 124, 10777–10786 (2020). DOI: 10.1021/acs.jpca.0c07796
I. Chandrasiri, D. Abebe M. L. Yaddehige, J. Williams, M. Zia, A. L. Dorris, A. Barker, B. Simms, A. Parker, N. Le, J. Gayton, N. I. Hammer, A. Flynt, J. H. Delcamp, and D. L. Watkins, “Self-Assembling PCL-PAMAM Linear Dendritic Block Copolymers (LDBCs) for Bioimaging and Phototherapeutic Applications,” ACS Applied Bio Materials, 3, 5664–5677 (2020). DOI: 10.1021/acsabm.0c00432 (Featured on Cover)
R. Chatterjee, B. Sajjadi, W. Y. Chen, D. L Mattern, N. I. Hammer, V. Raman, and A. Dorris, “Impact of Biomass Sources on Acoustic Based Chemical Functionalization of Biochars for Improved CO2 Adsorption,” Energy & Fuels, 34, 8608–8627 (2020). DOI: 10.1021/acs.energyfuels.0c01054
R. Chatterjee, B. Sajjadi, W. Y. Chen, D. L Mattern, N. I. Hammer, V. Raman, and A. Dorris, “Effect of Pyrolysis Temperature on Physicochemical Properties and Acoustic-Based Amination of Biochar for Efficient CO2 Adsorption,” Frontiers in Energy Research, 8, 85 (2020). DOI: 10.3389/fenrg.2020.00085
H. Shirley, T. M. Sexton, N. P. Liyanage, C. Z. Palmer, L. E. McNamara, N. I. Hammer, G. S. Tschumper, and J. H. Delcamp, “Effect of “X” Ligands on the Photocatalytic Reduction of CO2 to CO with Re(pyridylNHC-CF3)(CO)3X Complexes,” European Journal of Inorganic Chemistry, 2020, 1844–1851 (2020). DOI: 10.1002/ejic.202000283 (Featured on Cover)
W. E. Meador, S. A. Autry, R. Bessetti, J. Gayton, A. Flynt, N. I. Hammer, and J. H. Delcamp, “Water Soluble NIR Absorbing and Emitting Indolizine Cyanine and Indolizine Squaraine Dyes for Biological Imaging,” Journal of Organic Chemistry, 85, 4089-4095 (2020). DOI: 10.1021/acs.joc.9b03108 (Featured on Cover)
B. Sajjadi, W.-Y. Chen, D. L. Mattern, N. I. Hammer, A. Dorris, “Low-Temperature Acoustic-Based Activation of Biochar for Enhanced Removal of Heavy Metals,” Journal of Water Process Engineering, 34, 101166 (2020). DOI: 10.1016/j.jwpe.2020.101166
J. Gayton, S. A. Autry, W. Kolodziejczyk, G. Hill, N. I. Hammer, and J. H. Delcamp, “Phosphate and Water Sensing with a Zinc Dipicolylamine-Based Charge Transfer Dye,” ChemistrySelect, 5, 1945-1949 (2020). DOI: 10.1002/slct.202000198
R. R. Rodrigues, A. Peddapuram, A. L. Dorris, N. I. Hammer, and J. H. Delcamp, “Thienopyrroledione-Based Photosensitizers as Strong Photoinduced Oxidants: Oxidation of Fe(bpy)3 in a >1.3 V Dye-Sensitized Solar Cell,” ACS Applied Energy Materials, 2, 5547-5556 (2019). DOI: 10.1021/acsaem.9b00730
P. R. Fontenot, B. Shan, B. Wang, S. Simpson, G. Ragunathan, A. F. Greene, A. Obanda, L. A. Hunt, N. I. Hammer, E. C. Webster, J. T. Mague, R. H. Schmehl, and J. P. Donahue, “Photocatalytic H2-Evolution by Homogeneous Molybdenum Sulfide Clusters Supported by Dithiocarbamate Ligands,” Inorganic Chemistry, 58, 16458-16474 (2019). DOI: 10.1021/acs.inorgchem.9b02252
A. E. Hardin, T. L. Ellington, S. T. Nguyen, A. L. Rheingold, G. S. Tschumper, D. L. Watkins, and N. I. Hammer, “A Raman Spectroscopic and Computational Study of New Aromatic Pyrimidine-Based Halogen Bond Acceptors,” Inorganics, 7, 119 (2019). DOI: 10.3390/inorganics7100119
C. Rathnamalala, J. Gayton, A. L. Dorris, S. A. Autry, W. Meador, N. I. Hammer, J. H. Delcamp, and C. Scott, “Donor-Acceptor-Donor NIR II Emissive Rhodindolizine Dye Synthesized by C-H Bond Functionalization,” The Journal of Organic Chemistry, 84, 13186-13193 (2019). DOI: acs.joc.9b01860
S. Parajuli, C. Middleton, A. Rodriguez, A. Dorris, M. O’Haver, N. I. Hammer, and E. Ureña-Benavides, “Surface and Interfacial Interactions in Dodecane/Brine Pickering Emulsions Stabilized by Combination of Cellulose Nanocrystals and Emulsifiers,” Langmuir, 35, 12061-12070 (2019). DOI: 10.1021/acs.langmuir.9b01218
A. E. Steen, S. T. Nguyen, T. L. Ellington, S. Balasubramaniam, I. Chandrasiri, J. H. Delcamp, G. S. Tschumper, N. I. Hammer, and D. L. Watkins, “Probing the Photophysical Behavior of Furan- and Thiophene-containing Bispyridyl Oligomers via Spectroscopic and TD-DFT Methods,” Journal of Physical Chemistry C, 123, 15176−15185 (2019). DOI: 10.1021/acs.jpcc.9b01510
H. Cheema, P. Brogdon, E. K. Loya, L. E. McNamara, C. A. Carpenter, N. I. Hammer, S. Mathew, C. Risko, and J. H. Delcamp, “A NIR Absorbing Indolizine-Porphyrin Push-Pull Dye for Dye-Sensitized Solar Cells,” ACS Applied Materials & Interfaces, 11, 16474-16489 (2019). DOI: 10.1021/acsami.8b21414
R. M. Rajapakse, N. H. Attanayake, D. Karunathilaka, A. E. Steen, N. I. Hammer, D. R. Strongin, and D. L. Watkins, “Advances in Electro-copolymerization of NIR Emitting and Electronically Conducting Block Copolymers,” Journal of Materials Chemistry C, 7, 3168-3172 (2019). DOI: 10.1039/C8TC06331A.
S. Autry, J. N. Gayton, W. Meador, S. Parkin, G. Hill, N. I. Hammer, and J. H. Delcamp, “Indolizine-Cyanine Dyes: Near Infrared Emissive Cyanine Dyes with Increased Stokes Shifts,” Journal of Organic Chemistry, 84, 687-697 (2019). DOI: 10.1021/acs.joc.8b02521
R. Chatterjee, B. Sajjadi, W.-Y.Chen, D. L. Mattern, N. O. Egiebor, N. I. Hammer, and V. Raman, “Low Frequency Ultrasound Enhanced Dual Amination of Biochar: A Nitrogen-Enriched Sorbent for CO2 Capture,” Energy & Fuels, 33, 2366–2380 (2019). DOI: 10.1021/acs.energyfuels.8b03583
Y. Wusimanjiang, J. Yadav, V. Arau, A. E. Steen, N. I. Hammer, and S. Pan “Blue Electrogenerated Chemiluminescence from Halide Perovskite Nanocrystals,” Journal of Analysis and Testing (2019). DOI: 10.1007/s41664-018-0082-4
B. Sajjadi, J. W. Broome, W.-Y. Chen, D. Mattern, N. O. Egiebor, N. Hammer, C. L. Smith, “Urea Functionalization of Ultrasound-Treated Biochar: A Feasible Strategy for Enhancing Heavy Metal Adsorption Capacity,” Ultrasonics Sonochemistry, 51, 20-30 (2019). DOI: 10.1016/j.ultsonch.2018.09.015
S. Autry, J. N. Gayton, R. C. Fortenberry, N. I. Hammer, and J. H. Delcamp, “Counter Anion Effect on the Photophysical Properties of Emissive Indolizine-Cyanine Dyes in Solution and Solid State,” Molecules, 23, 3051 (2018). DOI: 10.3390/molecules23123051
S. J. Cassidy, I. Brettell-Adams, L. E. McNamara, M. F. Smith, M. Bautista, H. Cao, M. Vasiliu, D. L. Gerlach, F. Qu, N. I. Hammer, D. A. Dixon, and P. A. Rupar, “Boranes with Ultra High Stokes Shifts Fluorescence,” Organometallics, 37, 3732–3741 (2018). DOI: 10.1021/acs.organomet.8b00460
B. Sajjadi, J. W. Broome, W.-Y. Chen, D. Mattern, N. O. Egiebor, N. Hammer, C. L. Smith, “Urea Functionalization of Ultrasound-Treated Biochar: A Feasible Strategy for Enhancing Heavy Metal Adsorption Capacity,” Ultrasonics Sonochemistry, 51, 20-30 (2018). DOI: 10.1016/j.ultsonch.2018.09.015
S. N. Johnson, C. R. Hutchison, C. Williams, C. L. Hussey, G. S. Tschumper and N. I. Hammer, “Intermolecular interactions and vibrational perturbations within 1-ethyl-3-methlimidazolium thiocyanate / water mixtures,” Journal of Physical Chemistry C, 122, 27673 (2018). (Featured on Cover) DOI: 10.1021/acs.jpcc.8b07114
S. G. Zetterholm, G. A. Verville, L. Boutwell, C. Boland, J. C. Prather, J. Bethea, J. Cauley, K. Warren, S. A. Smith, D. H. Magers, N. I. Hammer, “Noncovalent Interactions between Tri-methylamine N-oxide (TMAO), Urea, and Water,” Journal of Physical Chemistry B, 122, 8805 (2018). (Featured on Cover) DOI: 10.1021/acs.jpcb.8b04388
A. Peddapuram, H. Cheema, L. E. McNamara, Y. Zhang, N. I. Hammer, and J. H. Delcamp, “Quinoxaline-based Dual Donor, Dual Acceptor Organic Dyes for Dye-Sensitized Solar Cells,” Applied Sciences, 8, 1421 (2018). DOI: 10.3390/app8091421
A. O. Weldeab, A. Steen, D. J. Starkenburg, J. S. D. Williams, J. Xue, N. I. Hammer, R. K. Castellano, and D. L. Watkins, “Tuning the Structural and Spectroscopic Properties of Donor-Acceptor-Donor Oligomers via Mutual X-Bonding, H-Bonding, and π-π Interactions,” Journal of Materials Chemistry C, 6, 11992 (2018). DOI: 10.1039/C8TC00074C
N. I. Hammer and G. S. Tschumper, “Importance of a Truly Cohesive Theme in a REU Program,” in Best Practices for Chemistry REU Programs, edited by Mark Griep and Linette Watkins, ACS Books, 2018. DOI: 10.1021/bk-2018-1295.ch011
P. S. Shinde, P. Fontenot, J. P. Donahue, J. L. Waters, P. Kung, L. E. McNamara, N. I. Hammer, A. Gupta, and S. Pan, “Rapid Screening of Photoanode Materials using SPECM Technique and Formation of Z-scheme Solar Water Splitting System by Coupling p- and n-type Heterojunction Photoelectrodes,” ACS Applied Energy Materials, 1, 12283 (2018). DOI: 10.1021/acsaem.8b00381
P. S. Shinde, P. Fontenot, J. P. Donahue, J. L. Waters, P. Kung, L. E. McNamara, N. I. Hammer, A. Gupta, and S. Pan, “Synthesis and Thin Film Coating of MoS2 from [Mo3S7(S2CNEt2)3]I for Enhanced Photoelectrochemical Performance and Stability of Cu2O Photocathode Toward Efficient Solar Water Splitting,” Journal of Materials Chemistry A, 6, 9569 (2018). DOI: 10.1039/C8TA01771A
A. J. Huckaba, H. Shirley, R. W. Lamb, S. Guertin, S. Autry, H. Cheema, K. Talukdar, T. Jones, J. W. Jurss, A. Dass, N. I. Hammer, R. H. Schmehl, C. E. Webster, J. H. Delcamp, “A Mononuclear Tungsten Photocatalyst for H2 Production,” ACS Catalysis, 8, 4838 (2018). DOI: 10.1021/acscatal.7b04242
S. Nguyen, T. Ellington, K. E. Allen, J. Gorden, A. Rheingold, G. S. Tschumper, N. I. Hammer, and D. L. Watkins, “Systematic Experimental and Computational Studies of Substitution and Hybridization in Solid-State Halogen Bonded Assemblies,” ACS Crystal Growth and Design, 18, 3244 (2018). DOI: 10.1021/acs.cgd.8b00398.
Y. Zhang, H. Cheema, L. McNamara, L. A. Hunt, N. I. Hammer, J. H. Delcamp, “Ullazine Donor-Pi bridge-Acceptor Organic Dyes for DSCs,” Chemistry – A European Journal, 24, 5936 (2018). DOI: 10.1002/chem.201800030
R. Chatterjee, B. Sajjadi, D. L. Mattern, W.-Y. Chen, T. Zubatiuk, D. Leszczynska, J. Leszczynski, N. O. Egiebor, N. Hammer, “Ultrasound Cavitation Intensified Amine Functionalization: A Feasible Strategy for Enhancing CO2 Capture Capacity of Biochar,” Fuel, 225, 287 (2018). DOI: 10.1016/j.fuel.2018.03.145
C. A. Carpenter, P. Brogdon, L .E. McNamara, G. S. Tschumper, N. I. Hammer, and J. H. Delcamp, “A Robust Pyridyl-NHC Ligated Rhenium Photocatalyst for CO2 Reduction in the Presence of Water and Oxygen,” Inorganics, 6, 22 (2018). DOI:10.3390/inorganics6010022
H. Cheema, A. Peddapuram, R. E. Adams, L. McNamara, L. Hunt, N. Le, D. L. Watkins, N. I. Hammer, R. H. Schmehl, and J. H. Delcamp, “Molecular Engineering of NIR Absorbing Thienopyrazine Double Donor Double Acceptor Organic Dyes for DSCs,” The Journal of Organic Chemistry, 82, 12038–12049 (2017). DOI: 10.1021/acs.joc.7b01750
L. E. McNamara, T. A. Rill, A. J. Huckaba, V. Ganeshraj, J. Gayton, R. A. Nelson, E. A. Sharpe, A. Dass, N. I. Hammer and J. H. Delcamp, “Indolizine-Squaraines: NIR Fluorescent Materials with Molecular Engineered Stokes Shifts,” Chemistry – A European Journal, 23, 12494 (2017). DOI: 10.1002/chem.201702209
K. M. Dreux, L. E. McNamara, J. T. Kelly, A. M. Wright, N. I. Hammer, and G. S. Tschumper, “Probing dative and dihydrogen bonding in ammonia borane with electronic structure computations and Raman under nitrogen spectroscopy,” Journal of Physical Chemistry A, 121, 5884 (2017). (Featured on Cover) DOI: 10.1021/acs.jpca.7b03509
J. D. Cope, J. A. Denny, R. W. Lamb, L. E. McNamara, N. I. Hammer, C. E. Webster, and T. K. Hollis, “Synthesis, Characterization, Photophysics and a Ligand Rearrangement of CCC-NHC Pincer Nickel Complexes: Colors, Polymorphs Emission and Raman Spectra,” Journal of Organometallic Chemistry, 845, 258 (2017). DOI: 10.1016/j.jorganchem.2017.05.046
Y. Zhang, S. A. Autry, L. E. McNamara, S. T. Nguyen, N. Le, P. Brogdon, D. L. Watkins, N. I. Hammer, and J. H. Delcamp, “Near-Infrared Fluorescent Thienothiadiazole Dyes with Large Stokes Shifts and High Photostability,” Journal of Organic Chemistry, 82, 5597-5606 (2017). DOI: 10.1021/acs.joc.7b00422
T. L. Ellington, P. L. Reves, B. L. Simms, J. L. Wilson, D. L. Watkins, G. S. Tschumper, and N. I. Hammer, “Quantifying the effects of halogen bonding by haloaromatic donors on the acceptor pyrimidine,” ChemPhysChem, 18, 1267–1273 (2017). (Featured on Cover) DOI: 10.1002/cphc.201700114
S. C. Sutton, W. E. Cleland, Jr., N. I. Hammer, “Introducing Students to a Synthetic and Spectroscopic Study of the Free Radical Chlorine Dioxide,” The Journal of Chemical Education, 94, 515–520 (2017). DOI: 10.1021/acs.jchemed.6b00599
K. M. Williams, M. Gruner, J. Gensheimer, A. Wright, M. Blair, S. A. Autry, and N. I. Hammer, “Partial displacement of a triamine ligand from a platinum(II) complex after reaction with N-acetylmethionine,” Inorganica Chimica Acta, 458, 163–170 (2017). DOI: 10.1016/j.ica.2017.01.010
N. N. Sreeramulu, L. McNamara, N. I. Hammer, and H. Rathnayake, “A versatile synthesis to novel binary reactive groups functionalized silsesquioxane microparticles,” Science Advances Today, 3, 25266 (2017).
J. Wang, J. Waters, P. Kung, S. Kim, J. T. Kelly, L. E. McNamara, N. I. Hammer, A. Gupta, and S. Pan, “A Facile Electrochemical Reduction Method for Improving Photocatalytic Performance of α-Fe2O3 Photoanode for Solar Water Splitting,” ACS Applied Materials and Interfaces, 9, 381-390 (2017). DOI: 10.1021/acsami.6b11057
A. J. Huckaba, A. Yella, L. E. McNamara, A. E. Steen, J. S. Murphy, C. A. Carpenter, G. D. Puneky, N. I. Hammer, M. K. Nazeeruddin, M. Grätzel, and J. H. Delcamp, “Molecular Design Principles of Near-Infrared Absorbing and Emitting Indolizine Dyes,” Chemistry – A European Journal, 22, 15536-15542 (2016). DOI: 10.1002/chem.201603165
J. T. Kelly, A. K. McClellan, L. V. Joe, A. M. Wright, L. T. Lloyd, G. S. Tschumper, and N. I. Hammer, “Competition between Hydrophilic and Argyrophilic Interactions in Surface Enhanced Raman Spectroscopy (SERS),” ChemPhysChem, 17, 2782-2786 (2016). DOI: 10.1002/cphc.201600678 (Featured on Inside Cover)
S. Ananthakrishnan, J. Strain, N. N. Sreeramulu, A. Mitul, L. E. McNamara, A. Iefanova, N. I. Hammer, Q. Qiao, and H. Rathnayake, “A Novel Donor-Donor Polymeric Dyad of P3HT-block-Oligo(anthracene-9,10-diyl): Synthesis, Solid-State Packing, and Electronic Properties,” Journal of Polymer Science, Part A: Polymer Chemistry, 54, 3032-3045 (2016). DOI: 10.1002/pola.28189
N. I. Hammer, S. Sutton, J. Delcamp, and J. D. Graham, “Photocatalytic Water Splitting and Carbon Dioxide Reduction,” Handbook of Climate Change Mitigation and Adaptation, Springer, 2nd Edition, 2016.
P. Brogdon, L. E. McNamara, A. Peddapuram, N. I. Hammer, and J. H. Delcamp, “Toward Tightly Bound Carboxylic Acid-Based Organic Dyes for DSCs: Relative TiO2 Binding Strengths of Benzoic Acid, Cyanoacrylic Acid, and Conjugated Double Carboxylic Acid Anchoring Dyes,” Synthetic Metals (2016). DOI: 10.1016/j.synthmet.2016.03.031
J. Lu, K. Cuellar, N. I. Hammer, S. Jo, A. Gryczke, K. Kolter, N. Langley, M. A. Repka, “Preparation and Solid-state Characterization of Felodipine-Soluplus® Amorphous Solid Dispersions,” Drug Development and Industrial Pharmacy, 42, 485–496 (2016). DOI: 10.3109/03639045.2015.1104347
L. E. McNamara, N. Liyanage, A. Peddapuram, J. S. Murphy, J. H. Delcamp, and N. I. Hammer, “Donor-Acceptor-Donor Thienopyrazines via Pd-Catalyzed C-H Activation as NIR Fluorescent Materials,” Journal of Organic Chemistry, 81, 32–42 (2016). DOI: 10.1021/acs.joc.5b01958
J. T. Kelly, Y. Wang, X. Zhang, S. Lyapustina, M. M. Nilles, S. Xu, J. D. Graham, T. S. Tschumper, K. H. Bowen, and N. I. Hammer, “The Onset of Electron-Induced Proton-Transfer in Hydrated Azabenzene Cluster Anions,” Physical Chemistry Chemical Physics, 18, 704-712 (2016). (Featured on Cover) DOI: 10.1039/C5CP02746B
2015
J. T. Kelly, J. A. Maner, and N. I. Hammer, “Recent Advancements in Chemical Physics,” Journal of Physical Chemistry A, 119, 12909–12910 (2015). DOI: 10.1021/acs.jpca.5b12096
A. F. DeBlase, C. Wolke, G. H. Weddle, K. Archer, K. Jordan, J. T. Kelly, G. S. Tschumper, N. I. Hammer, and M. A. Johnson, “Water network-mediated, electron-induced proton transfer in anionic [C5H5N·(H2O)n]¯ clusters,” The Journal of Chemical Physics, 143, 144305 (2015). DOI: 10.1063/1.4931928
J. Wilson, J. S. D. Williams, C. Petkovsek, P. Reves, J. Jurss, N. I. Hammer, G. Tschumper, and D. L. Watkins, “Synergistic Effects of Halogen Bond and pi-pi Interactions in Thiophene-based Building Blocks,” RSC Advances, 5, 82544-82548 (2015). DOI: 10.1039/c5Ra16680b
G. E. Tyson, K. Tokmic, C. S. Oian, D. Rabinovich, H. U. Valle, T. K. Hollis, J. T. Kelly, K. A. Cuellar, L.E. McNamara, N. I. Hammer, C. E. Webster, A. G. Oliver, “Synthesis, Characterization, Photophysical Properties, and Catalytic Activity of a SCS bis(N-heterocyclic thione) (SCS-NHT) Pd Pincer Complex,” Dalton Transactions, 44, 14475 – 14482 (2015). DOI: 10.1039/C4DT03324H
J. Bae, L. E. McNamara, M. A. Nael, F. Mahdi, R. J. Doerksen, G. L. Bidwell III, N. I. Hammer and S. Jo, “Nitroreductase‐triggered activation of a novel caged fluorescent probe obtained from methylene blue,” Chemical Communications, (2015). DOI: 10.1039/C5CC03824C
N. Vunnam, N. I. Hammer, and S. Pedigo, “Basic Residue at Position 14 is Not Required for Fast Assembly and Disassembly Kinetics in Neural Cadherin,” Biochemistry, 54, 836–843 (2015). DOI: 10.1021/bi5010415
F. Begum, J. Fergusona, K. McKenna, L. E. McNamara, N. I. Hammer, and H. Rathnayake, “Preparation of n-Type Semiconducting Polymer Nanoarrays by Covalent Synthesis Followed by Crystallization,” New Journal of Chemistry, 39, 2004-2010 (2015). DOI: 10.1039/C4NJ00968A
A. J. Huckaba, F. Giordano, L. E. McNamara, K. Dreux, N. I. Hammer, G. S. Tschumper, S. M. Zakeeruddin, M. Grätzel, M. K. Nazeeruddi, and J. H. Delcamp, “Indolizine-Based Donors as Organic Sensitizer Compounds for Dye-Sensitized Solar Cells,” Advanced Energy Materials, 5, 201401629 (2015). DOI: 10.1002/aenm.201401629
2014
D. J. George and N. I. Hammer, “Studying the Binomial Distribution Using LabVIEW,” Journal of Chemical Education,92, 389–394 (2014). DOI: 10.1021/ed500684k (2014). DOI: 10.1021/ed500684k
R. N. Compton and N. I. Hammer, “Raman Under Liquid Nitrogen (RUN),” Journal of Physics: Conference Series, 548, 012017 (2014). DOI: 10.1088/1742-6596/548/1/012017
E. R. Frey, A. Sygula, N. I. Hammer, “Particle in a Disk: A Spectroscopic and Computational Laboratory Exercise Studying the Nanomolecular Building Block Corannulene,” Journal of Chemical Education, 91, 2186-2190 (2014). DOI: 10.1021/ed4005062
J. T. Kelly, S. Xu, J. Graham, J. M. Nilles, D. Radisic, A. M. Buonaugurio, K. H. Bowen, Jr., N. I. Hammer, and G. S. Tschumper, “Photoelectron Spectroscopic and Computational Study of Hydrated Pyrimidine Anions,” Journal of Physical Chemistry A,118, 11901–11907 (2014). DOI: 10.1021/jp504724v (2014). DOI: 10.1021/jp504724v
L. Xu, V. R. Manda, L. E. McNamara, M. P. Jahan, H. Rathnayake, and N. I. Hammer, “Covalent Synthesis of Perylenediimide-Bridged Silsesquioxane Nanoribbons and Their Electronic Properties,” RCS Advances, 4, 30172-30179 (2014). DOI: 10.1039/C4RA03260H
D. N. Reinemann, G. S. Tschumper, and N. I. Hammer, “Characterizing the B-P Stretching Vibration in Phosphorous Substituted Phosphine Boranes,” ChemPhysChem, 15, 1867-1871 (2014). DOI: 10.1002/cphc.201400036
K. A. Cuellar, K. L. Munroe, D. H. Magers, and N. I. Hammer, “Noncovalent Interactions in Micro-solvated Networks of Trimethylamine N-oxide,” Journal of Physical Chemistry B, 118, 449-459 (2014). DOI: 10.1021/jp408659
A. M. Wright, A. A. Howard, J. C. Howard, G. S. Tschumper, and N. I. Hammer, “Charge Transfer and Blue Shifting of Vibrational Frequencies in a Hydrogen Bond Acceptor,” Journal of Physical Chemistry A, 117, 5435-5446 (2013). (cover article) DOI: 10.1021/jp401642b
A. Huckaba, B. Cao, T. K. Hollis, H. Valle, J. Kelly, N. I. Hammer, and A. Oliver, “Platinum CCC-NHC Benzimidazolyl Pincer Complexes: Synthesis, Characterization, Photostability, and Theoretical Investigations of a Blue-Green Emitter,” Dalton Transactions, 42, 8820-8826 (2013). DOI: 10.1039/c3dt50438g
H. Rathnayakea, N. Wright, A. Patel, J. Binion, L. E. McNamara, D. J. Scardino, and N. I. Hammer, “Synthesis and Characterization of Poly(3-Hexylthiophene)-Functionalized Siloxane Nanoparticles,” Nanoscale, 5, 3212-3215 (2013). DOI: 10.1039/C3NR34249B
D. J. Scardino, R. Kota, D. L. Mattern, and N. I. Hammer, “Single Molecule Spectroscopic Studies of Two Organic Rectifiers,” Chemical Physics Letters, 550, 138-145 (2012).
W.-Y. Chen, G. Shi, A. K. Hailey, E. S. T. Tsai, N. I. Hammer, and Z. Wu, “Photocatalytic Conversion of Carbon Dioxide to Organic Compounds Using A Green Photocatalyst: An Undergraduate Research Experiment,” The Chemical Educator, 17, 166-171 (2012).
H. Rathnayake, J. Binion, A. McKee, D. J. Scardino, and N. I. Hammer, “Perylenediimide Functionalized Bridged-Siloxane Nanoparticles for Bulk Heterojunction Organic Photovoltaics,” Nanoscale, 4, 4631-4640 (2012).
X. Zhang, A. M. Wright, N. J. DeYonker, T. K. Hollis, N. I. Hammer, C. E. Webster, and E. Valente “Synthesis, Air-stability, Photo-bleaching, and DFT Modeling of Blue Light-Emitting Platinum CCC-N-Heterocyclic Carbene Pincer Complexes,” Organometallics, 31, 1664-1672 (2012).
J. D. Graham and N. I. Hammer, “Photocatalytic Water Splitting and Carbon Dioxide Reduction,” Handbook of Climate Change Mitigation, Springer, 2012.
J. C. Howard, N. I. Hammer, and G. S. Tschumper, “Structures, Energetics and Vibrational Frequency Shifts of Hydrated Pyrimidine,” ChemPhysChem, 12, 3262-3273 (2011). DOI: 10.1002/cphc.201100457
K. L. Munroe, D. H. Magers, and N. I. Hammer, “Raman Spectroscopic Signatures of Noncovalent Interactions Between Trimethylamine N-oxide (TMAO) and Water,” Journal of Physical Chemistry B, 115, 7699-7707 (2011). DOI: 10.1021/jp203840w
D. N. Reinemann, A. M. Wright, J. D. Wolfe, G. S. Tschumper, and N. I. Hammer, “Vibrational Spectroscopy of N-Methyliminodiacetic Acid(MIDA)-Protected Boronate Ester: Assignment of the B-N Dative Bond Stretching Frequency,” Journal of Physical Chemistry A, 115, 6426-6431 (2011). DOI: 10.1021/jp112016j
D. J. Scardino, A. A. Howard, M. D. McDowell, and N. I. Hammer, “Raman Spectroscopy as the Method of Detection for Constructing a Binary Liquid-Vapor Phase Diagram,” Journal of Chemical Education, 88, 1162-1165 (2011). DOI: 10.1021/ed100016g
Q. Zhao, J. Wang, J. L. Freeman, M. Murphy-Jolly, A. M. Wright, D. J. Scardino, N. I. Hammer, C. M. Lawson, and G. M. Gray, “Syntheses, and Optical, Fluorescence and Nonlinear Optical Characterization of Phosphine-Substituted Terthiophenes,” Inorganic Chemistry, 50, 2015-2027 (2011). DOI: 10.1021/ic101624y
A. M. Wright, L. V. Joe, A. A. Howard, G. S. Tschumper, and N. I. Hammer, “Spectroscopic and Computational Insight into Weak Noncovalent Interactions in Crystalline Pyrimidine,” Chemical Physics Letters, 501, 319-323 (2011). DOI:10.1016/j.cplett.2010.11.046
D. J. Scardino, M. McDowell, J. D. Graham, and N. I. Hammer, “The Multiphoton Ionization Spectrum of Methyl Iodide Revisted: 1.67 – 2.2 eV Excitation,” Journal of Atomic and Molecular Sciences, 2, 93-98 (2011). DOI: 10.4208/jams.010511.011411a
A. A. Howard, G. S. Tschumper, and N. I. Hammer, “Effects of Hydrogen Bonding on Vibrational Normal Modes of Pyrimidine,” Journal of Physical Chemistry A, 114, 6803-6810 (2010). DOI: 10.1021/jp101267w
G. S. Tschumper and N. I. Hammer, “Non-Covalent Interactions: Theory and Experiment,” Journal of the American Chemical Society, 132, 9512 (2010). DOI: 10.1021/ja104759m
M. McDowell, A. E. Wright and N. I. Hammer, “Semiconductor Nanocrystals Hybridized with Functional Ligands: New Composite Materials with Tunable Properties,” Materials, 3, 614-637 (2010). DOI: 10.3390/ma3010614
S. N. Murthy, A. B. Nair, N. I. Hammer, S. R. Kiran Vaka, and A. E. Wright, “Dermatokinetics of Nanoparticles (25 nm),” International Journal of Innovative Pharmaceutical Research, 1 (2), 37-43 (2010)
A. Muraoka, Y. Inokuchi, N. I. Hammer, J.-W. Shin, M. A. Johnson, and T. Nagata, “Structural Evolution of the [(CO2)n(H2O)]- Cluster Anions: Quantifying the Effect of Hydration on the Excess Charge Accommodation Motif,” Journal of Physical Chemistry A, 113, 8942-8948 (2009). DOI: 106 3/1.2827475
M. D. Barnes, R. H. Paradise, E. Swain, D. Venkataraman, and N. I. Hammer, “Comment on Limits on Fluorescence Detected Circular Dichroism of Single Helicene Molecules,” Journal of Physical Chemistry A, 113, 9757-9758 (2009). DOI: 10.1021/jp903598t
J. R. Roscioli, N. I. Hammer, M. A. Johnson, K. Diri and K. D. Jordan, “Exploring the correlation between network structure and electron binding energy in the (H2O)-7 cluster through isomer photoselected vibrational predissociation spectroscopy and ab initio calculations: Addressing complexity beyond types I-III,” Journal of Chemical Physics, 128, 104314 (2008). DOI: 10.1063/1.2827475
M. Y. Odoi, N. I. Hammer, K. T. Early, K. D. McCarthy, R. Tangirala, T. Emrick and M. D. Barnes, “Fluorescence lifetimes and correlated photon statistics from single CdSe/oligo-(phenylene vinylene) composite nanostructures,” Nano Letters, 9, 2769 (2007). DOI: 10.1021/nl0713068
K. T. Early, K. D. McCarthy, N. I. Hammer, M. Y. Odoi, R. Tangirala, T. Emrick and M. D. Barnes, “Blinking suppression and intensity recurrences in single CdSe-oligo(phenylene vinylene) nanostructures: experiment and kinetic model,” Nanotechnology, 18, 424027 (2007). DOI: 10.1088/0957-4484/18/42/424027
N. I. Hammer, T. Emrick, and M. D. Barnes, “Quantum dots coordinated with conjugated organic ligands: new nanomaterials with novel photophysics,” Nanoscale Research Letters, 2, 282 (2007). (Invited Review) DOI: 10.1007/s11671-007-9062-8
M. Y. Odoi, N. I. Hammer, H. P. Rathnayake, P. M. Lahti, and M. D. Barnes, “Single Molecule Studies of a Model Fluorenone,” ChemPhysChem, 8, 1481 (2007). DOI: 10.1002/cphc.200700133
H. P. Rathnayake, A. Cirpan, F. E. Karasz, M. Y. Odoi, N. I. Hammer, M. D. Barnes, P. M. Lahti, “Luminescence of Molecular and Block Copolymeric 2,7-Bis(phenylethenyl)-fluorenones; Identifying Green-band Emitter Sites in a Fluorene-Based Luminophore,” Chemistry of Materials, 19, 3265 (2007). DOI: 10.1021/cm070552h
2006
J. R. Roscioli, N. I. Hammer, and M. A. Johnson, “Infrared Spectroscopy of Water Cluster Anions, (H2O)3-24- in the HOH Bending Region: Persistence of the Double H-Bond Acceptor (AA) Water Molecule in the Excess Electron Binding Site of the Class I Isomers,” Journal of Physical Chemistry A, 110, 7517 (2006). (Letter) DOI: 10.1021/jp062029g
N. I. Hammer, K. T. Early, M. Y. Odoi, K. Sill, T. Emrick, and M. D. Barnes, “Quantum Dot/Polymer Composites for Quantum Informatics and Sensor Applications,” Journal of Intelligence Community Research and Development (2006).
R. Hassey, E. Swain, N. I. Hammer, D. Venkataraman, and M. D. Barnes, “Probing the Chiroptical Response of a Single Molecule,” Science, 314, 1437 (2006). DOI: 10.1126/science.1134231
N. I. Hammer, K. T. Early, K. Sill, M. Y. Odoi, T. Emrick, and M. D. Barnes, “Coverage-mediated suppression of blinking in solid state quantum dot-conjugated organic composite nanostructures,” Journal of Physical Chemistry B, 110, 14167 (2006). (Cover Article) DOI: 10.1021/jp0620645f
M. Y. Odoi, N. I. Hammer, K. Sill, T. Emrick, and M. D. Barnes, “Observation of enhanced energy transfer in individual quantum dot-oligophenylene vinylene nanostructures,” Journal of the American Chemical Society, 128, 3506 (2006). (Communication) DOI: 10.1021/ja058429j
N. I. Hammer, J. R. Roscioli, J. C. Bopp, J. M. Headrick, and M. A. Johnson, “Vibrational predissociation spectroscopy of the (H2O)-6-21 clusters in the OH stretching region: Evolution of the excess electron binding signature into the intermediate cluster size regime,” Journal of Chemical Physics, 123, 244311 (2005). DOI: 10.1063/1.2134701
N. I. Hammer, J. R. Roscioli, M. A. Johnson, E. M. Myshakin, and K. D. Jordan, “Infrared Spectrum and Structural Assignment of the Water Trimer Anion,” Journal of Physical Chemistry A, 109, 11526 (2005). DOI: 10.1021/jp053769c
E. G. Diken, N. I. Hammer, M. A. Johnson, R. A. Christie, and K. D. Jordan, “Mid infrared characterization of the NH4+(H2O)n clusters in the neighborhood of the n = 20 magic number,” Journal of Chemical Physics, 123, 164309 (2005). DOI: 10.1063/1.2074487
N. I. Hammer, J. R. Roscioli, and M. A. Johnson, “Identification of two distinct electron binding motifs in the anionic water clusters: A vibrational spectroscopic study of the (H2O)-6 isomers,” Journal of Physical Chemistry A, 109, 7896 (2005). (Cover Article) DOI: 10.1021/jp052144b
J. M. Headrick, E. G. Diken, R. S. Walters, N. I. Hammer, R. A. Christie, J, Cui, E. M. Myshakin, M. A. Duncan, M. A. Johnson, and K. D. Jordan, “Spectral signatures of hydrated proton vibrations in water clusters,” Science, 308, 1765 (2005). DOI:10.1126/science.1113094
N. I. Hammer, E. G. Diken, J. R. Roscioli, E. M. Myshakin, K. D. Jordan, A. B. McCoy, X. Huang, S. Carter, J. M. Bowman, and M. A. Johnson, “The vibrational predissociation spectra of the H5O2+•RGn (RG = Ar, Ne) clusters: Correlation of the solvent perturbations in the free OH and shared proton transitions of the Zundel ion,” Journal of Chemical Physics, 122, 244301 (2005). DOI:10.1063/1.1927522
J.-W. Shin, N. I. Hammer, H. Schneider, A. GloB, J. M. Weber, and M. A. Johnson, “Infrared determination of core-ion switching in the (CO2)n- clusters from both the ion and solvent perspectives,” Journal of Physical Chemistry A, 109, 3146 (2005). DOI: 10.1021/jp050092k
W. D. Robertson, N. I. Hammer, J. E. Bartmess, K. Diri, K. D. Jordan, and R. N. Compton, “Negative Ions of Ethylene Sulfite,” Journal of Chemical Physics, 122, 204319 (2005). DOI: 10.1063/1.1913578
N. I. Hammer, S. G. Stepanian, L. Adamowicz, and R. N. Compton, “Isotope Effects in Dipole-Bound Anions of Acetone,” Physical Review Letters, 94, 153004, (2005). DOI: 10.1103/PhysRevLett.94.153004
N. I. Hammer, J.-W. Shin, J. M. Headrick, E. G. Diken, J. R. Roscioli, G. H. Weddle, and M. A. Johnson, “How do small water clusters bind an excess electron?,” Science, 306, 675 (2004). DOI: 10.1126/science.1102792
J.-W. Shin, N. I. Hammer, J. M. Headrick, and M. A. Johnson, “Preparation and photoelectron spectrum of the “missing” (H2O)4- cluster,” Chemical Physics Letters, 399, 675 (2004). DOI: 10.1016/j.cplett.2004.10.015
E. G. Diken, N. I. Hammer, and M. A. Johnson, “Preparation and photoelectron spectrum of the glycine molecular anion: Assignment to a dipole-bound electron species with a high-dipole moment, non-zwitterionic form of the neutral core,” Journal of Chemical Physics, 120, 9899, (2004). DOI: 10.1063/1.1755196
W. Shin, N. I. Hammer, E. G. Diken, M. A. Johnson, R. S. Walters, T. D. Jaeger, M. A. Duncan, R. A. Christie, and K. D. Jordan, “Infrared signature of structural motifs associated with the H+(H2O)n, n = 6-29, clusters,” Science, 304, 1137 (2004). DOI: 10.1126/science.1096466
E. A. Price, N. I. Hammer, and M. A. Johnson, “A cluster study of Cl2- microhydration: Size-dependent competition between symmetrical H-bonding to the anion and the formation of cyclic water networks in the Cl2-•1-5(H2O) series,” Journal of Physical Chemistry A, 108, 3910 (2004). DOI: 10.1021/jp031239f
C. Desfranois, Y. Bouteiller, J. P. Schermann, D. Radisic, S. T. Stokes, K. H. Bowen, N. I. Hammer, and R. N. Compton, “Long-range electron binding to quadrupolar molecules,” Physical Review Letters, 92, 083003 (2004). DOI: 10.1103/PhysRevLett.92.083003
N. I. Hammer, R. J. Hinde, K. Diri, K. D. Jordan, D. Radisic, K. H. Bowen, and R. N. Compton, “Dipole-Bound Anions of Highly Polar Molecules: Ethylene Carbonate and Vinylene Carbonate,” Journal of Chemical Physics, 120, 685 (2004). DOI: 10.1063/1.1629669
N. I. Hammer, K. Diri, K. D. Jordan, C. Desfranois, and R. N. Compton, “Dipole-Bound Anions of Carbonyl, Nitrile, and Sulfoxide Containing Molecules,” Journal of Chemical Physics, 119, 3650 (2003). DOI: 10.1063/1.1590959 Click here for experimental and calculated molecular properties
N. I. Hammer and R. N. Compton, “Effects of Electric Fields and Collisions on Highly Excited Rubidium Atoms,” European Physical Journal D, 26, 27 (2003). DOI: 10.1140/epjd/e2003-00200-0
N. I. Hammer, F. Gao, R. M. Pagni, and R. N. Compton, “Charge Transfer Reactions between Chiral Rydberg Atoms and Chiral Molecules,” Journal of Chemical Physics, 117, 4299 (2002). DOI: 10.1063/1.1496760
R. N. Compton and N. I. Hammer, “Multipole-Bound Molecular Anions” in Advances in Gas-Phase Ion Chemistry Volume 4, edited by N. Adams and L. Babcock, Elsevier Science, 2001, pp. 257-291.
N. I. Hammer and R. N. Compton, “Effects of dc Electric Fields on Multiphoton Ionization of Rubidium Atoms at Low and High Densities” in Tenth International Symposium on Resonance Ionization Spectroscopy Proceedings, edited by J. Parks and J. Young, American Institute of Physics, 2001 pp. 145-153. DOI: 10.1063/1.1405596