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He H, Zhang L, Yue S, Yu S, Wei J, Ouyang J. Enhancement in the Mechanical Stretchability of PEDOT:PSS Films by Compounds of Multiple Hydroxyl Groups for Their Application as Transparent Stretchable Conductors. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02309] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Hao He
- Department of Materials Science & Engineering, National University of Singapore, Singapore 117579, Singapore
| | - Lei Zhang
- Department of Materials Science & Engineering, National University of Singapore, Singapore 117579, Singapore
| | - Shizhong Yue
- Department of Materials Science & Engineering, National University of Singapore, Singapore 117579, Singapore
| | - Suzhu Yu
- Singapore Institute of Manufacturing Technology, 73 Nanyang Drive, Singapore 637662, Singapore
| | - Jun Wei
- Harbin Institute of Technology, University Town of Shenzhen, HIT Campus, Nanshan District, Shenzhen 518055, P. R. China
| | - Jianyong Ouyang
- Department of Materials Science & Engineering, National University of Singapore, Singapore 117579, Singapore
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Mo Y, Schleyer PVR, Wu W, Lin M, Zhang Q, Gao J. Importance of Electronic Delocalization on the C−N Bond Rotation in HCX(NH2) (X = O, NH, CH2, S, and Se). J Phys Chem A 2003. [DOI: 10.1021/jp036560c] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yirong Mo
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008, Department of Chemistry, State Key Laboratory for Physical Chemistry of Solid Surfaces and Center for Theoretical Chemistry, Xiamen University, Xiamen, Fujian 361005, People's Republic of China, Department of Chemistry, University of Georgia, Athens, Georgia 30602, and Department of Chemistry and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455
| | - Paul von Ragué Schleyer
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008, Department of Chemistry, State Key Laboratory for Physical Chemistry of Solid Surfaces and Center for Theoretical Chemistry, Xiamen University, Xiamen, Fujian 361005, People's Republic of China, Department of Chemistry, University of Georgia, Athens, Georgia 30602, and Department of Chemistry and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455
| | - Wei Wu
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008, Department of Chemistry, State Key Laboratory for Physical Chemistry of Solid Surfaces and Center for Theoretical Chemistry, Xiamen University, Xiamen, Fujian 361005, People's Republic of China, Department of Chemistry, University of Georgia, Athens, Georgia 30602, and Department of Chemistry and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455
| | - Menghai Lin
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008, Department of Chemistry, State Key Laboratory for Physical Chemistry of Solid Surfaces and Center for Theoretical Chemistry, Xiamen University, Xiamen, Fujian 361005, People's Republic of China, Department of Chemistry, University of Georgia, Athens, Georgia 30602, and Department of Chemistry and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455
| | - Qianer Zhang
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008, Department of Chemistry, State Key Laboratory for Physical Chemistry of Solid Surfaces and Center for Theoretical Chemistry, Xiamen University, Xiamen, Fujian 361005, People's Republic of China, Department of Chemistry, University of Georgia, Athens, Georgia 30602, and Department of Chemistry and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455
| | - Jiali Gao
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008, Department of Chemistry, State Key Laboratory for Physical Chemistry of Solid Surfaces and Center for Theoretical Chemistry, Xiamen University, Xiamen, Fujian 361005, People's Republic of China, Department of Chemistry, University of Georgia, Athens, Georgia 30602, and Department of Chemistry and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455
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Affiliation(s)
- Harold Basch
- Department of Chemistry, Bar Ilan University, Ramat Gan 52900, Israel
| | - Tova Hoz
- Department of Chemistry, Bar Ilan University, Ramat Gan 52900, Israel
| | - Shmaryahu Hoz
- Department of Chemistry, Bar Ilan University, Ramat Gan 52900, Israel
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Abstract
A majority of the standard texts dealing with proteins portray the peptide link as a mixture of two resonance forms, in one of which the nitrogen atom has a positive charge. As a consequence, it is often believed that the nitrogen atom has a net positive charge. This is in apparent contradiction with the partial negative charge on the nitrogen that is used in force fields for molecular modeling. However, charges on resonance forms are best regarded as formal rather than actual charges and current evidence clearly favors a net negative charge for the nitrogen atom. In the course of the discussion, new ideas about the electronic structure of amides and the peptide bond are presented.
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Affiliation(s)
- E J Milner-White
- Division of Biochemistry and Molecular Biology, Glasgow University, United Kingdom.
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