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Kudo T, Taketsugu T, Gordon MS. Ab initio Molecular Dynamics Study of H 2Formation inside POSS Compounds. 2. The Effect of an Encapsulated Hydrogen Molecule. J Phys Chem A 2016; 120:8699-8715. [DOI: 10.1021/acs.jpca.6b07907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takako Kudo
- Division of Pure and Applied Science, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Tetsuya Taketsugu
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Mark S. Gordon
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-2030, United States
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A Theoretical Study of the Insertion of Atoms and Ions into Titanosilsequioxane (Ti-POSS) in Comparison with POSS. INT J POLYM SCI 2012. [DOI: 10.1155/2012/391325] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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Kudo T, Taketsugu T, Gordon MS. Ab Initio Molecular Dynamics Study of H2 Formation Inside POSS Compounds. J Phys Chem A 2011; 115:2679-91. [DOI: 10.1021/jp1105778] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Takako Kudo
- Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, Kiryu 376-8515, Japan
| | - Tetsuya Taketsugu
- Department of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Mark S. Gordon
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-2030, United States
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Kudo T. Ab Initio Molecular Orbital Study of the Insertion of H2 into POSS Compounds 2: The Substituent Effect and Larger Cages. J Phys Chem A 2009; 113:12311-21. [DOI: 10.1021/jp904488s] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takako Kudo
- Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, Kiryu 376-8515, Japan
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Kudo T, Akasaka M, Gordon MS. Ab Initio Molecular Orbital Study on the Ge-, Sn-, Zr- and Si/Ge-Mixed Silsesquioxanes. J Phys Chem A 2008; 112:4836-43. [DOI: 10.1021/jp7114669] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takako Kudo
- Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, Kiryu 376-8515, Japan, and Department of Chemistry, Iowa State University, Ames, Iowa 50011-2030
| | - Mitsutoshi Akasaka
- Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, Kiryu 376-8515, Japan, and Department of Chemistry, Iowa State University, Ames, Iowa 50011-2030
| | - Mark S. Gordon
- Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, Kiryu 376-8515, Japan, and Department of Chemistry, Iowa State University, Ames, Iowa 50011-2030
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Olson RM, Bentz JL, Kendall RA, Schmidt MW, Gordon MS. A Novel Approach to Parallel Coupled Cluster Calculations: Combining Distributed and Shared Memory Techniques for Modern Cluster Based Systems. J Chem Theory Comput 2007. [DOI: 10.1021/ct600366k] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Ryan M. Olson
- Department of Chemistry, Iowa State University, Ames, Iowa, Department of Computer Science, Iowa State University, Ames, Iowa 50011, and Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - Jonathan L. Bentz
- Department of Chemistry, Iowa State University, Ames, Iowa, Department of Computer Science, Iowa State University, Ames, Iowa 50011, and Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - Ricky A. Kendall
- Department of Chemistry, Iowa State University, Ames, Iowa, Department of Computer Science, Iowa State University, Ames, Iowa 50011, and Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - Michael W. Schmidt
- Department of Chemistry, Iowa State University, Ames, Iowa, Department of Computer Science, Iowa State University, Ames, Iowa 50011, and Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - Mark S. Gordon
- Department of Chemistry, Iowa State University, Ames, Iowa, Department of Computer Science, Iowa State University, Ames, Iowa 50011, and Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
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Kudo T, Akasaka M, Gordon MS. Ab initio molecular orbital study of the insertion of H2 into POSS compounds. Theor Chem Acc 2007. [DOI: 10.1007/s00214-007-0304-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Li HC, Lee CY, McCabe C, Striolo A, Neurock M. Ab Initio Analysis of the Structural Properties of Alkyl-Substituted Polyhedral Oligomeric Silsesquioxanes. J Phys Chem A 2007; 111:3577-84. [PMID: 17441697 DOI: 10.1021/jp0672757] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ab initio quantum mechanical calculations have been performed to establish the potentials for alkyl-substituted polyhedral oligomeric silsesquioxane (POSS) monomers RxH8-x(SiO1.5)8. More specifically, we have examined the unsubstituted POSS (SiO1.5H)8 cage as well as linear and cyclic alkyl-substituted cages where one of the terminating hydrogen atoms is replaced by a hydrocarbon group, that is, R1H7(SiO1.5)8. The results for the minimum-energy configurations indicate that the presence of the linear hydrocarbon chains and cyclic intermediates have very little effect on the structure of the POSS cage. Although the POSS monomeric cage does influence the partial charges of the first few carbon atoms covalently bound to the POSS monomer, its effect on the structural properties of the alkyl chain is small. Differences arise, however, for cyclic alkyl substitutents bound to the POSS cage due to the repulsive interactions between the POSS cage and bulkier cyclic intermediates that result upon rotation of the Si-C-C-C dihedral angles. The interatomic potentials for these rotational, or torsional, terms need to be modified slightly in order to appropriately simulate sterically hindered substitutents on the cage. Our results suggest that combining an atomistic force field independently developed to describe silsesquioxanes with an independent atomistic model developed to describe hydrocarbon chains can be used in classical molecular simulation studies of most alkyl-silsesquioxanes. This avoids the need to develop specific force fields for each substituted POSS cage studied and opens up the possibility of using molecular simulation to probe the thermodynamic and structural properties of these unique nanoscale building blocks.
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Affiliation(s)
- Hung-Chih Li
- Department of Chemical Engineering, Vanderbilt University, Nashville, TN 37235, USA
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Park SS, Xiao C, Hagelberg F, Hossain D, Pittman CU, Saebo S. Endohedral and Exohedral Complexes of Polyhedral Double Four-Membered-Ring (D4R) Units with Atomic and Ionic Impurities. J Phys Chem A 2004. [DOI: 10.1021/jp046136r] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kudo T, Gordon MS. Ab Initio Study of the Catalytic Reactivity of Titanosilsesquioxanes and Titanosiloxanes. J Phys Chem A 2003. [DOI: 10.1021/jp0307553] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takako Kudo
- Department of Fundamental Studies, Faculty of Engineering, Gunma University, Kiryu 376-8515, Japan
| | - Mark S. Gordon
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-2030
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Tejerina B, Gordon MS. Insertion Mechanism of N2 and O2 into Tn(n = 8, 10, 12)-Silsesquioxane Framework. J Phys Chem B 2002. [DOI: 10.1021/jp021490f] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Mark S. Gordon
- Department of Chemistry, Iowa State University, Ames, Iowa 50011
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