Publications

*Denotes undergraduate author
#Denotes high school author
127S. Jäger, J. Khatri, P. Meyer, S. Henkel, G. Schwaab, A. Nandi, P. Pandey, K.R. Barlow, M.A. Perkins, G.S. Tschumper, J.M. Bowman, A. van der Avoird and M. Havenith, Nat. Commun. 15, 9540 (2024). On the nature of hydrogen bonding in the H2S dimer
DOI Link
126W.E. Meador, M.A. Saucier, M.R. Tucker, N.A. Kruse, A.J. Mobley*, C.R. Brower, S.R. Parkin, K.M. Clark, N.I. Hammer, G.S. Tschumper and J.H. Delcamp Chem. Sci., 15, 12349-12360 (2024). Extended shortwave infrared absorbing antiaromatic fluorenium-indolizine chromophores
DOI Link
125J.J. Mosely and G.S. Tschumper J. Phys. Chem. A, 128, 5637-5645 (2024). Probing the Effects of Size and Charge on the Monohydration and Dihydration of SiF5 and SiF62− via Comparisons with BF4 and PF6
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124M.A. Saucier, N.A. Kruse, B.E. Seidel, N.I. Hammer, G.S. Tschumper and J.H. Delcamp J. Org. Chem., 89, 9092-9097 (2024). Phospha-RosIndolizine Dye with Shortwave Infrared (SWIR) Absorption and Emission
DOI Link
123Y. Xue, T.M. Sexton, J. Yang* and G.S. Tschumper, PCCP, 26, 12483-12494 (2024). Systematic Analysis of Electronic Barrier Heights and Widths for Concerted Proton Transfer in Cyclic Hydrogen Bonded Clusters: (HF)n (HCl)n and (H2O)n where n=1,2,3,4
DOI Link   Supporting Data
122C.A. Rock and G.S. Tschumper, Int. J. Mol. Sci., 24, 17480 (2023). Insight into the Binding of Argon to Cyclic Water Clusters from Symmetry-Adapted Perturbation Theory
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121L.N. Olive, E.V. Dornshuld, H.F. Schaefer and G.S. Tschumper, J. Phys. Chem. A, 127, 8806-8820 (2023). Competition Between Solvent/Solvent and Solvent/Solute Interactions in the Microhydration of the Tetrafluoroborate Anion, BF4(H2O)n=1,2,3,4
DOI Link   Cover Art
120K.R. Barlow and G.S. Tschumper, Mol. Phys., 122, e2262621 (2024). Fundamental vibrational frequencies of pnictogen (Pn) containing linear triatomic anions: OCPn and SCPn where Pn = N, P, As and Sb
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119L.E. McNamara, E.C. Lambert*, D.N. Reinemann, H. Valle, T.K. Hollis, G.S. Tschumper and N.I. Hammer, Chem. Phys. Lett., 816, 140369 (2023). Corrigendum to “Raman spectroscopic, computational, and X-ray crystallographic investigation of intermolecular interactions in trimethylamine N-oxide (TMAO) and TMAO-d9” [Chem. Phys. Lett. 805 (2022) 139928]
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118M.A. Perkins and G.S. Tschumper, Chem. Phys., 568, 111843 (2023). Characterization of competing halogen-bonding and hydrogen-bonding motifs in the acetonitrile/hydrogen iodide dimer
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117A.L. Dorris, J. Watson, J.J. Mosely, E.C. Lambert*, G.S. Tschumper, J.H. Delcamp and N.I. Hammer, J. Phys. Chem. C, 127, 649-659 (2023). Effects of Proaromaticity on Excited-State Lifetimes and Charge Separation in Near-Infrared Sensitizer Dyes in Solution and on TiO2
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116K.R. Barlow and G.S. Tschumper, Int. J. Quantum. Chem., 123, e27075 (2023). Conformational comparison of urea and thiourea near the CCSD(T) complete basis set limit
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115L.E. McNamara, E.C. Lambert*, D.N. Reinemann, H. Valle, T.K. Hollis, G.S. Tschumper and N.I. Hammer, Chem. Phys. Lett., 805, 139928 (2022). Raman spectroscopic, computational, and X-ray crystallographic investigation of intermolecular interactions in trimethylamine N-oxide (TMAO) and TMAO-d9
DOI Link
114M.A. Perkins and G.S. Tschumper, J. Phys. Chem A, 126, 3688-3695 (2022). Characterization of Competing Halogen- and Hydrogen-Bonding Motifs in Simple Mixed Dimers of HCN and HX (X = F, Cl, Br, and I)DOI Link
113D. 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, CrystEngComm, 24, 4564-4572 (2022). Correlation of solid-state order to optoelectronic behavior in heterocyclic oligomers
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112C.A. Rock, S.N. Arradondo and G.S. Tschumper, J. Phys. Chem A, 125, 10524 (2021). Solvation of Isoelectronic Halide and Alkali Metal Ions by Argon Atoms
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111A.E. Williams, N.I. Hammer and G.S. Tschumper, J. Chem. Phys., 155, 114306 (2021). Relative Energetics of CH3CH2O, CH3CHOH and CH2CH2OH Radical Products from Ethanol Dehydrogenation
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110K.R. Barlow, S.M. Goodlett*, S.N. Arradondo and G.S. Tschumper, Mol. Phys., 116, e1967495 (2021). Fundamental vibrational frequencies of isolated 2-phosphaethynolate and 2-phosphaethynthiolate anions: OCP and SCP
DOI Link
109M.A. Perkins, L.M. Cline* and G.S. Tschumper, J. Phys. Chem A, 125, 6228-6237 (2021). Torsional Profiles of Thiophene and Furan Oligomers: Probing the Effects of Heterogeneity and Chain Length
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108B.R. Westbrook, E.M. Valencia*, S.C. Rushing*, G.S. Tschumper and R.C. Fortenberry, J. Chem. Phys., 154, 041104 (2021). Anharmonic vibrational frequencies of ammonia borane (BH3NH3)
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107H.P. 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, ChemPhotoChem, 5, 353-361 (2021). 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
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106Y.A. Abdo* and G.S. Tschumper, J. Phys. Chem A, 124, 8744-8752 (2020). Competition Between Solvent-Solvent and Solvent-Solute Interactions in the Microhydration of the Hexafluorophosphate Anion, PF6(H2O)n=1,2
DOI Link   Cover Art
105E.J. Carrell, C.M. Thorne* and G.S. Tschumper, J. Chem. Phys., 153, 069901 (2020). Errattum “Basis Set Dependence of Higher-Order Correlation Effects in π-Type Interactions” [J. Chem. Phys. 136, 014103 (2012)]
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104M.A. Perkins, K.R. Barlow, K.M. Dreux, and G.S. Tschumper, J. Chem. Phys. 152, 214306 (2020). Anchoring the Hydrogen Sulfide Dimer Potential Energy Surface to Juxtapose (H2S)2 with (H2O)2
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103R. Schwan, C. Qu, D. Mani, N. Pal, G. Schwaab, J.M. Bowman, G.S. Tschumper and M. Havenith, Angew. Chem. Int. Ed. 59, 11399-11407 (2020). Observation of the low frequency spectrum of water trimer as a sensitive test of the water trimer potential and the dipole moment surface
DOI Link   Frontispiece Artwork   NSF News Release   ScienceDaily News Release
102H. Shirley, T.M. Sexton, N.P. Liyanage, C.Z. Palmer*, L.E. McNamara, N.I. Hammer, G.S. Tschumper and J.H. Delcamp, Eur. J. Inorg. Chem. (19), 1844-1851 (2020). Effect of “X” Ligands on the Photocatalytic Reduction of CO2 to CO with Re(pyridylNHC-CF3)(CO)3X Complexes
DOI Link   Article Share Link   Cover Feature
101T.M. Sexton, W.Z. Van Benschoten* and G.S. Tschumper, Chem. Phys. Lett. 748, 137382 (2020). Dissociation Energy of the HCN⋯HF Dimer
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100Y.P. Bhavsar-Jog, E.V. Dornshuld, T.A. Brooks, G.S. Tschumper and R.M. Wadkins, Molecules, 24, 3619 (2019). Co-Localization of DNA i-Motif-Forming Sequences and 5-Hydroxymethyl-cytosines in Human Embryonic Stem Cells 
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99A.E.S. Hardin, T.L. Ellington, S.T. Nguyen*, A.L. Rheingold, G.S. Tschumper, D.L. Watkins and N.I. Hammer, Inorganics, 7, 119 (2019). A Raman Spectroscopic and Computational Study of New Aromatic Pyrimidine-Based Halogen Bond Acceptors
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98B.E. Smith, J.M. Carr and G.S. Tschumper, Molecules, 24, 2523 (2019). Cis/Trans Energetics in Epoxide, Thiirane, Aziridine and Phosphirane Containing Cyclopentanols: Effects of Intramolecular OH⋯O, S, N and P Contacts
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97A.E. Steen, T.L. Ellington, S.T. Nguyen*, S. Balasubramaniam, I. Chandrasiri, J.H. Delcamp, G.S. Tschumper, N.I. Hammer and D.L. Watkins, J. Phys. Chem. C, 123, 15176-15185 (2019). Characterization of Furan- and Thiophene-Containing Bispyridyl Oligomers via Spectroscopic, Electrochemical, and TD-DFT Methods
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96K.M. Pittman*, H.R. McAlexander, G.S. Tschumper, and M.K. Shukla, J. Phys. Chem. A, 123, 3504-3509 (2019). Computational Investigation on Electronic Structures and Properties of 4,6-bis(nitroimino)-1,3,5-triazinan-2-one: An Insensitive Munition Compound
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95S.N. Johnson, T.L. Ellington, D.T. Ngo*, J.L. Nevarez*, N. Sparks, A.L. Rheingold, D. L. Watkins and G.S. Tschumper, CrystEngComm, 21, 3151-3157 (2019). Probing Non-covalent Interactions Driving Molecular Assembly in Organo-electronic Building Blocks
DOI Link   Cover Art
94T.M. Sexton and G.S. Tschumper, Mol. Phys., 117, 1413-1420 (2019). 2-body:Many-body QM:QM Study of Structures, Energetics, and Vibrational Frequencies for Microhydrated Halide Ions
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93J.T. Kelly, T.L. Ellington, T.M. Sexton, R.C. Fortenberry, G.S. Tschumper and K.R. Asmis, J. Chem. Phys., 149, 191101 (2018). Communication: Gas Phase Vibrational Spectroscopy of the Azide-Water Complex
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92K.M. Dreux and G.S. Tschumper, J. Comput. Chem., 40, 229-236 (2019). Examination of the structures, energetics, and vibrational frequencies of small sulfur-containing prototypical dimers, (H2S)2 and H2O/H2S
DOI Link   Article Share Link
91S.P. Lee*, S.N. Johnson, T.L. Ellington, N. Mirsaleh-Kohan and G.S. Tschumper, ACS Omega, 3, 12936-12943 (2018). Energetics and Vibrational Signatures of Nucleobase Argyrophilic Interactions
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90B. Westbrook*, K.M. Dreux, G.S. Tschumper, J.S. Francisco and R.C. Fortenberry, PCCP, 20, 25967-25973 (2018). Binding of the Atomic Cations Hydrogen through Argon to Water and Hydrogen Sulfide
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89S.N. Johnson, C.R. Hutchinson#, C.M. Williams*, C.L. Hussey G.S. Tschumper and N.I. Hammer, J. Phys. Chem. C, 122, 27673-27680 (2018). Intermolecular Interactions and Vibrational Perturbations within Mixtures of 1-Ethyl-3-methylimidazolium Thiocyanate and Water
DOI Link   Cover Art
88N.I. Hammer and G.S. Tschumper, ACS Symposium Series, 1295, 157-175 (2018). Importance of a Truly Cohesive Theme in a REU Program, Ch.11 in Best Practices for Chemistry REU Programs, edited by M. Griep and L. Watkins
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87T.M. Sexton, J.C. Howard and G.S. Tschumper, J. Phys. Chem. A, 122, 4902-4908 (2018). Dissociation Energy of the H2O⋯HF Dimer
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86S.T. Nguyen*, T.L. Ellington, K.D. Allen, J.D. Gorden, A.L. Rheingold, G.S. Tschumper, N.I. Hammer and D.L. Watkins, Cryst. Growth Des., 18, 3244-3254 (2018). Systematic Experimental and Computational Studies of Substitution and Hybridization in Solid-State Halogen Bonded Assemblies
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85C.A. Carpenter*, P. Brogdon, L.E. McNamara, G.S. Tschumper, N.I. Hammer and J.H. Delcamp Inorganics, 6, 22 (2018). A Robust Pyridyl-NHC-Ligated Rhenium Photocatalyst for CO2 Reduction in the Presence of Water and Oxygen
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84S.N. Johnson and G.S. Tschumper, J. Comput. Chem., 39, 839-843 (2018). Hydrogen Bonding in the Mixed HF/HCl Dimer: Is It Better to Give or Receive?
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83Y.A. Abdo*, J.W. Weeks*, W. Layfield*, W.M. Tremlett*, J.W. Graham*, M.E. Tabor*, S.E. Causey*, J.M. Carr and G.S. Tschumper, Chem. Lett., 47, 156-159 (2018). Intramolecular Hydrogen Bonding in α-Epoxy Alcohols: A Conformational Analysis of 1,2-dialkyl-2,3-epoxy Cyclopentanol Diastereomers 
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82G.S. Tschumper, T.L. Ellington and S.N. Johnson, Ann. Rep. Comput. Chem., 13, 93-115 (2017). Dissociation in Binary Acid/Base Clusters: An Examination of Inconsistencies Introduced Into the Many-Body Expansion by Naïve Fragmentation Schemes
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81K.M. Dreux, L.E. McNamara, J.T. Kelly, A.M. Wright, N.I. Hammer and G.S. Tschumper, J. Phys. Chem. A, 121, 5884-5893 (2017). Probing Dative and Dihydrogen Bonding in Ammonia Borane with Electronic Structure Computations and Raman under Nitrogen Spectroscopy 
DOI Link   Cover Art
80T.L. Ellington, P.L. Reves*, B.L. Simms, J.L. Wilson*, D.L. Watkins, G.S. Tschumper and N.I. Hammer, ChemPhysChem, 18, 1267-1273 (2017). Quantifying the Effects of Halogen Bonding by Haloaromatic Donors on the Acceptor Pyrimidine
DOI Link   Cover Art
79S.T. Nguyen*, A.L. Rheingold, G.S. Tschumper and D.L. Watkins, Cryst. Growth Des., 16 6648-6653 (2016). Elucidating the Effects of Fluoro and Nitro Substituents on Halogen Bond Driven Assemblies of Pyridyl-capped π-Conjugated Molecules
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78J.T. Kelly, A.K. McClellan*, L.V. Joe*, A.M. Wright, L.T. Lloyd*, G.S. Tschumper and N.I. Hammer, ChemPhysChem, 17, 2782-2786 (2016). Competition between Hydrophilic and Argyrophilic Interactions in Surface Enhanced Raman Spectroscopy (SERS)
DOI Link   Cover Art
77E.V. Dornshuld and G.S. Tschumper, J. Chem. Theory Comput., 12, 1534-1541 (2016). Big changes for small non-covalent dimers: Revisiting the potential energy surfaces of (P2)2 and (PCCP)2 with CCSD(T) optimizations and vibrational frequencies
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76P. Brogdon, F. Giordano, G.A. Puneky*, A. Dass, S.M. Zakeeruddin, M.K. Nazeeruddin, M. Grätzel, G.S. Tschumper and J.H. Delcamp, Chem. Eur. J., 22, 694-703 (2016). Proaromaticity of Thieno[3,4-b]thiophene: Computational and Experimental Evaluation as a π-Bridge in DSCs
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75J.C. Howard, J.D. Enyard and G.S. Tschumper, J. Chem. Phys, 143, 214103 (2015). Assessing the Accuracy of Some Popular DFT Methods for Computing Harmonic Vibrational Frequencies of Water Clusters 
DOI Link (Open Access)
74A.F. DeBlase, C.T. Wolke, G.H. Weddle, K.A. Archer, K.D. Jordan, J.T. Kelly, G.S. Tschumper, N.I. Hammer and M.A. Johnson, J. Chem. Phys, 143, 144305 (2015). Water network-mediated, electron-induced proton transfer in anionic [C5H5N⋯ (H2O)n] clusters: Size-dependent formation of the pyridinium radical for n≤3
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73J. Wilson*, J.S.D. Williams, C. Petkovsek*, P. Reves*, J.W. Jurss, N.I. Hammer, G.S. Tschumper and D.L. Watkins, RSC Adv., 5, 82544 (2015). Synergistic Effects of Halogen Bond and π Interactions in Thiophene-based Building Blocks
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72K.M. Dreux and G.S. Tschumper, Comp. Theor. Chem., 1072, 21-27 (2015). Anchoring the potential energy surface of an important atmospheric van der Waals dimer, the H2O⋯O2 complex
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71Y. Wang, X. Zhang, S. Lyapustina, J.M. Nilles, S. Xu, J.D. Graham, K.H. Bowen, J.T. Kelly, G.S. Tschumper and N.I. Hammer , PCCP, 18, 704-712 (2016). The Onset of Electron-Induced Proton-Transfer in Hydrated Azabenzene Cluster Anions
DOI Link   Cover Art
70J.C. Howard and G.S. Tschumper, J. Chem. Theory Comput., 11, 2126-2136 (2015). Benchmark Structures and Harmonic Vibrational Frequencies Near the CCSD(T) Complete Basis Set Limit for Small Water Clusters: (H2O)n=2, 3, 4, 5, 6
DOI Link (Open Access via ACS AuthorChoice License)   Supporting Data
69J.M. Carr, G.S. Tschumper and A.P. Lathem* Helv. Chim. Acta, 98, 582-588 (2015). Boyd Group Electronegativity Influence on the Parr Global Electrophilicity of Vilsmeier Reagent-Derived Imidates: New Insights toward Improving Mitsunobu Chemistry
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68A.J. Huckaba, F. Giordano, L.E. McNamara, K.M. Dreux, N.I. Hammer, G.S. Tschumper, S.M. Zakeeruddin, M. Grätzel, M.K. Nazeeruddin and J.H. Delcamp Adv. Energy Mater. 5, 1401629 (2014). Indolizine-Based Donors as Organic Sensitizer Components for Dye-Sensitized Solar Cells
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67J.C. Howard, J.L. Gray*, A.J. Hardwick*, L.T. Nguyen* and G.S. Tschumper, J. Chem. Theory Comput., 10, 5426-5435 (2014). Getting down to the Fundamentals of Hydrogen Bonding: Anharmonic Vibrational Frequencies of (HF)2 and (H2O)2 from Ab Initio Electronic Structure Computations 
DOI Link (Open Access via ACS AuthorChoice License)
66E.V. Dornshuld, R.A. Vergenz and G.S. Tschumper, J. Phys. Chem. B, 118, 8583-8590 (2014). Peptide Bond Formation via Glycine Condensation in the Gas Phase
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65J.T. Kelly, S. Xu, J.D. Graham, J.M. Nilles, D. Radisic, A. M. Buonaugurio, K.H. Bowen, N.I Hammer and G.S. Tschumper, J. Phys. Chem. A, 118, 11901-11907 (2014). Photoelectron Spectroscopic and Computational Study of Hydrated Pyrimidine Anions
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64E.V. Dornshuld, C.M. Holy* and G.S. Tschumper, J. Phys. Chem. A, 118, 3376-3385 (2014). Homogeneous and Heterogeneous Noncovalent Dimers of Formaldehyde and Thioformaldehyde: Structures, Energetics, and Vibrational Frequencies
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63D.N. Reinemann*, G.S. Tschumper and N.I. Hammer, ChemPhysChem, 15, 1867-1871 (2014). Characterizing the B-P Stretching Vibration in Phosphorus-Substituted Phosphine Boranes 
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62Y. Bhavsar-Jog, E.V. Dornshuld, T.A. Brooks, G.S. Tschumper and R.M. Wadkins, Biochemistry, 53, 1586-1594 (2014). Epigenetic modification, dehydration, and molecular crowding effects on the thermodynamics of i-motif structure formation from C-rich DNA 
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61E.V. Dornshuld and G.S. Tschumper, J. Comput. Chem., 35, 479-487 (2014). Characterization of the potential energy surfaces of two small but challenging noncovalent dimers: (P2)2 and (PCCP)2
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60J.C. Howard and G.S. Tschumper, J. Chem. Phys., 139, 184113 (2013). N-body:Many-body QM:QM Vibrational Frequencies: Application to Small Hydrogen-Bonded Clusters
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59K.L. Copeland, S.J. Pellock*, J.R. Cox, M.L. Cafiero and G.S. Tschumper, J. Phys. Chem. B, 117, 14001-14008 (2013). Examination of tyrosine/adenine stacking interactions in protein complexes
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58J.C. Howard and G.S. Tschumper, WIREs Comput. Mol. Sci., 4, 199-224 (2014). Wavefunction methods for the accurate characterization of water clusters
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57T.L. Ellington and G.S. Tschumper, Comp. Theor. Chem., 1021, 109-113 (2013). Anchoring the potential energy surface of the nitrogen/water dimer, N2⋯H2O, with explicitly correlated coupled-cluster computations
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56A.M. Wright, A.A. Howard*, J.C. Howard*, G.S. Tschumper and N.I. Hammer, J. Phys Chem. A, 117, 5435-5446 (2013). Charge Transfer and Blue Shifting of Vibrational Frequencies in a Hydrogen Bond Acceptor
DOI Link   Cover Art
55K.L. Copeland and G.S. Tschumper, J. Chem. Theory Comput., 8, 4279-4284 (2012). Effects of Heterogeneity in Small π-Type Dimers: Homogeneous and Mixed Dimers of Diacetylene and Cyanogen
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54K.L. Copeland and G.S. Tschumper, J. Chem. Theory Comput., 8, 1646-1656 (2012). Hydrocarbon/Water Interactions: Encouraging Energetics and Structures from DFT but Disconcerting Discrepancies for Hessian Indices 
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53E.J. Carrell, C.M. Thorne* and G.S. Tschumper, J. Chem. Phys., 136, 014103 (2012). Basis Set Dependence of Higher-Order Correlation Effects in π-Type Interactions
DOI Link   Supporting Data
52V.R. Jupally, R. Kota, E.V. Dornshuld, D.L. Mattern, G.S. Tschumper, D. Jiang and A. Dass, J. Am. Chem. Soc., 133, 20258-20266 (2011). Inter-staple Dithiol Crosslinking in Au25(SR)18 Nanomolecules: A Combined Mass Spectrometric and Computational Study.
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51J.C. Howard*, N.I. Hammer and G.S. Tschumper, ChemPhysChem, 12, 3262-3273 (2011). Structures, Energetics and Vibrational Frequency Shifts of Hydrated Pyrimidine.
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50D.M. Bates, J.R. Smith* and G.S. Tschumper, J. Chem. Theory Comput., 7, 2753-2760 (2011). Efficient and Accurate Methods for the Geometry Optimization of Water Clusters: Application of Analytic Gradients for the 2-body:Many-Body QM:QM Fragmentation Method to (H2O)nn=3-10.
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49E.G. Hohenstein, H.M. Jaeger, E.J. Carrell, G.S. Tschumper and C.D. Sherrill, J. Chem. Theory Comput., 7, 2842-2851 (2011). Accurate interaction energies for problematic dispersion-bound complexes: homogeneous dimers of NCCN, P2 and PCCP.
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48D.M. Bates, J.R. Smith*, T. Janowski and G.S. Tschumper, J. Chem. Phys., 135, 044123 (2011). Development of a 3-body:Many-body Integrated Fragmentation Method for Weakly Bound Clusters and Application to Water Clusters (H2O)n=3-10,16,17.
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47D.N. Reinemann*, A.M. Wright, J.D. Wolfe*, G.S. Tschumper and N.I. Hammer, J. Phys. Chem. A, 115, 6426-6431 (2011). Vibrational Spectroscopy of N-Methyliminodiacetic Acid (MIDA)-Protected Boronate Ester: Examination of the B-N Dative Bond.
DOI Link   Cover Art
46A.M. Wright, L.V. Joe*, A.A. Howard*, G.S. Tschumper and N.I. Hammer, Chem. Phys. Lett., 501, 319-323 (2011). Spectroscopic and computational insight into weak noncovalent interactions in crystalline pyrimidine.
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45A.A. Howard*, G.S. Tschumper and N.I. Hammer, J. Phys. Chem. A, 114, 6803-6810 (2010). Effects of hydrogen bonding on vibrational normal modes of pyrimidine.
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44D.M. Bates and G.S. Tschumper, J. Phys. Chem. A, 113, 3555-3559 (2009). CCSD(T) complete basis set limit relative energies for low-lying water hexamer structures.
DOI Link   Cover Art
43A.M. ElSohly*, B.W. Hopkins, K. L. Copeland and G.S. Tschumper, Mol. Phys., 107, 923-928 (2009). Anchoring the potential energy surface of the diacteylene dimer. 
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42G.S. Tschumper in, Reviews in Computational Chemistry, K.B. Lipkowitz and T.R. Cundari, Eds., VCH, New York, 26, 39-90 (2009). Reliable Electronic Structure Computations for Weak Noncovalent Interactions.
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41K.L. Copeland, J.A. Anderson, A.R. Farley*, J.R. Cox and G.S. Tschumper, J. Phys. Chem. B, 112 , 14291-14295 (2008). Probing Phenylalanine/Adenine π-Stacking Interactions in Protein Complexes with Explicitly Correlated and CCSD(T) Computations.
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40A.M. ElSohly* and G.S. Tschumper, Int. J. Quantum. Chem., 109, 91-96 (2009). Comparison of polarization consistent and correlation consistent basis sets for noncovalent interactions.
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39D. M. Bates, J. A. Anderson, P. Oloyede and G. S. Tschumper, Phys. Chem. Chem. Phys., 10, 2775-2779 (2008). Probing the effects of heterogeneity on delocalized π…π interaction energies.
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38A. M. ElSohly*, C. L. Shaw*, M. E. Guice*, B. D. Smith* and G. S. Tschumper, Mol. Phys., 105, 2777-2782 (2007). Analytic gradients for the multicentered integrated QM:QM method for weakly bound clusters: efficient and accurate 2-body:many-body geometry optimizations.
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37A. J. Weldon and G. S. Tschumper, Int. J. Quantum. Chem., 107, 2261-2265 (2007). Intrinsic Conformational Preferences of and an Anomeric-like Effect in 1-Substituted Silacyclohexanes. 
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36B. W. Hopkins, A. M. ElSohly*, and G. S. Tschumper, Phys. Chem. Chem. Phys., 9, 1550-1558 (2007). Reliable Structures and Energetics for Two New Delocalized π…π Prototypes: Cyanogen Dimer and Diacetylene Dimer.
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35A. J. Weldon and G. S. Tschumper, J. Org. Chem., 71, 9212-9216 (2006). Energetics of Oxaspirocycle Prototypes: 1,7-Dioxaspiro[5.5]undecane and 1,7,9-Trioxadispiro[5.1.5.3]hexadecane. 
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34J. A. Anderson, B. W. Hopkins, J. L. Chapman*, and G. S. Tschumper, J. Mol. Struct. (THEOCHEM)771, 65-71 (2006). A Systematic Assessment of Density Functionals and ONIOM Schemes for the Study of Hydrogen Bonding between Water and the Side Chains of Serine, Threonine, Asparagine, and Glutamine.
DOI Link
33G. S. Tschumper, Chem. Phys. Lett., 427, 185-191 (2006). Multicentered Integrated QM:QM Methods for Weakly Bound Clusters: An Efficient and Accurate 2-body:Many-body Treatment of Hydrogen Bonding and van der Waals Interactions. 
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32J. A. Anderson and G.S. Tschumper, J. Phys. Chem. A.110, 7268-7271 (2006). Characterizing the Potential Energy Surface of the Water Dimer with DFT: Failures of Some Popular Functionals for Hydrogen Bonding. 
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31A. M. ElSohly*, M. L. Renault*, and G. S. Tschumper, J. Phys. Chem. A110, 1975-1977 (2006). Reliable Electron Affinities of Perfluorocyclopropane and Perfluorocyclobutane from Convergent ab InitioComputations.
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30A. Jones Weldon, T. L. Vickrey and G. S. Tschumper, J. Phys. Chem. A., 109, 11073-11079 (2005). Intrinsic Conformational Preferences of Substituted Cyclohexanes and Tetrahydropyrans Evaluated at the CCSD(T) Complete Basis Set Limit: Implications for the Anomeric Effect.
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29A. M. ElSohly*, G. S. Tschumper, R. A. Crocombe, J. T. Wang, and T. F. Williams, J. Am. Chem. Soc., 127, 10573-10583 (2005). Computational and ESR Studies of Electron Attachment to Octafluorocyclobutane and Hexafluorocyclopropane: Electron Affinities of the Molecules and the Structures of their Stable Negative Ions as Determined from the 13C and 19F Hyperfine Coupling Constants.
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28B. W. Hopkins and G. S. Tschumper, Chem. Phys. Lett., 407, 362-367 (2005). Integrated QM/QM Methods for π…π Stacking: Multicentered QM/QM Studies of the Cyanogen and Diacetylene Trimers.
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27B. W. Hopkins and G. S. Tschumper, Mol. Phys.103, 309-315 (2005). Multicentered QM/QM methods for Overlapping Model Systems.
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26J. A. Anderson, K. Crager*, L. C. Fedoroff*, and G.S. Tschumper, J. Chem. Phys.121, 11023-11029 (2004). Anchoring the Potential Energy Surface of the Cyclic Water Trimer. 
DOI Link   Supporting Data
25B. W. Hopkins and G. S. Tschumper, J. Phys. Chem. A108, 2941-2948 (2004). Ab Initio Studies of π…π Interactions: The Effects of Quadruple Excitations.
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24N. J. Russ, T. D. Crawford, and G. S. Tschumper, J. Chem. Phys.120, 7298-7306 (2004). Real vs. Artifactual Symmetry Breaking Effects in Hartree-Fock, Density-Functional and Coupled Cluster Methods.
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23B. W. Hopkins and G. S. Tschumper, Int. J. Quantum Chem.96, 294 (2004). Extending the ONIOM Integrated MO/MO Approach to Hydrogen Bonding in Biological Systems: Serine-Water and Threonine-Water Dimers.
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22N. R. Brinkmann, G. S. Tschumper, G. Yan, and H.  F. Schaefer, J. Phys. Chem. A107, 10208 (2003). An Alternative Mechanism for the Dimerization of Formic Acid.
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21P. Zhang, S. Irle, K. Morokuma, and G. S. Tschumper, J. Chem. Phys.119, 6524 (2003). Ab Initio Theoretical Studies of Potential Energy Surfaces in the Photodissociation of the Vinyl Radical. I. Ã State Dissociation.
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20B. W. Hopkins and G. S. Tschumper, J. Comput. Chem.24, 1563 (2003). A Multicentered Approach to Integrated QM/QM Calculations. Applications to Multiply Hydrogen Bonded Systems.
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19G. S. Tschumper, M. C. Heaven, and K. Morokuma, Chem. Phys. Lett.370, 418 (2002). Concerning the Stability of Dichlorodiazene. 
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18G. S. Tschumper and K. Morokuma, J. Mol. Struct. (Theochem)592, 137 (2002). Gauging the Applicability of ONIOM(MO/MO) Methods to Weak Chemical Interactions in Large Systems: Hydrogen Bonding in Alcohol Dimers. 
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17G. S. Tschumper, M. C. Heaven, and K. Morokuma, J. Phys. Chem. A106, 8453 (2002). An ab Initio Excursion on the Lowest 18 Electronic Surfaces of the NCl + NCl System: Some Insight into the Long-Range Self-Quenching Pathways of the First Excited State of NCl. 
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16R. G. Carter, D. E. Graves, M. A. Gronemeyer*, and G. S. Tschumper, Org. Lett.4, 2181 (2002). Synthesis of the ABC Ring System of Azaspiracid. 2. A Systematic Study into the Effect of C16 and C17 Substitution on Bis-spirocyclization.
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15G. S. Tschumper and M. R. Hoffman, J. Math. Chem.31, 105 (2002). Superconvergent perturbation theory for an anharmonic oscillator.
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14J. C. Rienstra-Kiracofe, G. S. Tschumper, H. F. Schaefer, S. Nandi, and G. B. Ellison, Chem. Rev.102, 231 (2002). Atomic and Molecular Electron Affinities: Photoelectron Experiments and Theoretical Computations.
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13G. S. Tschumper, M. L. Leininger, B. C. Hoffman, E. F. Valeev, H. F. Schaefer, and M. Quack, J. Chem. Phys.116, 690 (2002). Anchoring the Water Dimer Potential Energy Surface with Explicitly Correlated Computations and Focal Point Analyses.
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12G. S. Tschumper, J. Chem. Phys.114, 225 (2001). Chemically Accurate Conformational Energies for Aziridine-2-carbonitrile. 
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11R. Berger, M. Quack, and G. Tschumper, Helv. Chim. Acta83, 1919 (2000). Electroweak Quantum Chemistry for Possible Precursor Molecules in the Evolution of Biomolecular Homochirality. 
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10R. A. Provencal, R. N. Casaes, K. Roth, J. B. Paul, C. N. Chapo, R. J. Saykally, G. S. Tschumper, and H. F. Schaefer, J. Phys. Chem. A104, 1423 (2000). Hydrogen Bonding in Alcohol Clusters: A Comparative Study by Infrared Cavity Ringdown Laser Absorption Spectroscopy.
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9G. S. Tschumper, J. M. Gonzalez, and H. F. Schaefer, J. Chem. Phys.111, 3027 (1999). Assignment of the Infrared Spectra of the Methanol Trimer. 
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8N. R. Brinkmann*, G. S. Tschumper, and H. F. Schaefer, J. Chem. Phys.110, 6240 (1999). Electron Affinities of the Oxides of Aluminum, Silicon, Phosphorus, Sulfur, and Chlorine.
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7R. A. Provencal, J. B. Paul, K. Roth, C. Chapo, R. N. Casaes, R. J. Saykally, G. S. Tschumper, and H. F. Schaefer, J. Chem. Phys.110, 4258 (1999). Infrared Cavity Ringdown Spectroscopy of Methanol Clusters: Single Donor Hydrogen Bonding. 
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6G. S. Tschumper, M. D. Kelty*, and H. F. Schaefer, Mol. Phys.96, 493 (1999). Subtle Basis Set Effects on Hydrogen Bonded Systems.
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5G. S. Tschumper and H. F. Schaefer, J. Chem. Phys.108, 7511 (1998). A Comparison between the CISD[TQ] Wave Function and Other Highly Correlated Methods: Molecular Geometry and Harmonic Vibrational Frequencies of MgH2.
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4G. S. Tschumper and H. F. Schaefer, J. Chem. Phys.107, 2529 (1997). Predicting Electron Affinities with Density Functional Theory: Some Positive Results for Negative Ions.
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3G. S. Tschumper, Y. Yamaguchi, and H. F. Schaefer, J. Chem. Phys.106, 9627 (1997). A High Level Theoretical Study of the Cyclic Hydrogen Fluoride Trimer.
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2J. T. Fermann, B. C. Hoffman, G. S. Tschumper, and H. F. Schaefer, J. Chem. Phys.106, 5102 (1997). The Hydroperoxyl Radical Dimer: Triplet Ring or Singlet String? 
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1G. S. Tschumper, J. T. Fermann, and H. F. Schaefer, J. Chem. Phys.104, 3676 (1996). Structures, Thermochemistry, and Electron Affinities of the PFn and PFn Series (n = 1-6). 
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