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Langer P, Amiri S, Bodtke A, Saleh NNR, Weisz K, Görls H, Schreiner PR. 3,5,7,9-Substituted Hexaazaacridines: Toward Structures with Nearly Degenerate Singlet−Triplet Energy Separations. J Org Chem 2008; 73:5048-63. [DOI: 10.1021/jo8005123] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Peter Langer
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, D-18059 Rostock, Germany, Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, D-18059 Rostock, Germany, Institut für Organische Chemie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 58, D-35392 Giessen, Germany, Institut für Pharmazie, Universität Greifswald, Friedrich-Ludwig-Jahn-Str. 17, D-17487 Greifswald, Germany, Institut für Biochemie, Universität Greifswald, Felix-Hausdorff-Str. 18, D
| | - Shadi Amiri
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, D-18059 Rostock, Germany, Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, D-18059 Rostock, Germany, Institut für Organische Chemie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 58, D-35392 Giessen, Germany, Institut für Pharmazie, Universität Greifswald, Friedrich-Ludwig-Jahn-Str. 17, D-17487 Greifswald, Germany, Institut für Biochemie, Universität Greifswald, Felix-Hausdorff-Str. 18, D
| | - Anja Bodtke
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, D-18059 Rostock, Germany, Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, D-18059 Rostock, Germany, Institut für Organische Chemie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 58, D-35392 Giessen, Germany, Institut für Pharmazie, Universität Greifswald, Friedrich-Ludwig-Jahn-Str. 17, D-17487 Greifswald, Germany, Institut für Biochemie, Universität Greifswald, Felix-Hausdorff-Str. 18, D
| | - Nehad N. R. Saleh
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, D-18059 Rostock, Germany, Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, D-18059 Rostock, Germany, Institut für Organische Chemie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 58, D-35392 Giessen, Germany, Institut für Pharmazie, Universität Greifswald, Friedrich-Ludwig-Jahn-Str. 17, D-17487 Greifswald, Germany, Institut für Biochemie, Universität Greifswald, Felix-Hausdorff-Str. 18, D
| | - Klaus Weisz
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, D-18059 Rostock, Germany, Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, D-18059 Rostock, Germany, Institut für Organische Chemie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 58, D-35392 Giessen, Germany, Institut für Pharmazie, Universität Greifswald, Friedrich-Ludwig-Jahn-Str. 17, D-17487 Greifswald, Germany, Institut für Biochemie, Universität Greifswald, Felix-Hausdorff-Str. 18, D
| | - Helmar Görls
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, D-18059 Rostock, Germany, Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, D-18059 Rostock, Germany, Institut für Organische Chemie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 58, D-35392 Giessen, Germany, Institut für Pharmazie, Universität Greifswald, Friedrich-Ludwig-Jahn-Str. 17, D-17487 Greifswald, Germany, Institut für Biochemie, Universität Greifswald, Felix-Hausdorff-Str. 18, D
| | - Peter R. Schreiner
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, D-18059 Rostock, Germany, Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, D-18059 Rostock, Germany, Institut für Organische Chemie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 58, D-35392 Giessen, Germany, Institut für Pharmazie, Universität Greifswald, Friedrich-Ludwig-Jahn-Str. 17, D-17487 Greifswald, Germany, Institut für Biochemie, Universität Greifswald, Felix-Hausdorff-Str. 18, D
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Kato T, Yamabe T. Electron-phonon interactions in the monocations of polyacetylenes. J Chem Phys 2006; 124:084705. [PMID: 16512734 DOI: 10.1063/1.2149851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Electron-phonon interactions in the monocations of trans-polyacetylenes such as C2H4 (2tpa), C4H6 (2tpa), C6H8 (6tpa), and C8H10 (8tpa) are studied. The C-C stretching Ag modes around 1700 cm(-1) afford the largest electron-phonon coupling constants in the monocations of polyacetylenes. However, the C-C bending Ag modes around 1200 cm(-1) afford much smaller electron-phonon coupling constants than the C-C stretching Ag modes around 1700 cm(-1) in the monocations of polyacetylenes. The total electron-phonon coupling constants for the monocations (l HOMO) are estimated to be 0.357, 0.285, 0.281, and 0.279 eV for 2tpa, 4tpa, 6tpa, and 8tpa, respectively. The l HOMO values for polyacetylenes with C 2h geometry hardly change with an increase in molecular size while those for polyacenes with D 2h geometry significantly decrease with an increase in molecular size. The l HOMO values for polyacetylenes are larger than those for polyacenes. The calculated results are rationalized in terms of the phase patterns of the molecular orbitals in detail. The electron transfer in the positively charged polyacetylenes is also discussed. Intramolecular electron mobility (sigma(intra,monocation)) in the positively charged polyacetylenes is estimated to be smaller than those for the positively charged polyacenes. The reorganization energies for the positively charged polyacetylenes are estimated to be larger than those for the positively charged polyacenes. Thus, the larger overlap integrals between two neighboring molecules are needed for the positively charged polyacetylenes to become good conductor than those for positively charged polyacenes. On the other hand, the conditions under which the electron-electron interactions are attractive are more easily realized in the monocations of polyacetylenes than in the monocations of polyacenes. The quality as conducting materials would not significantly depend on the molecular size in the positively charged polyacetylenes, compared with that in the positively charged polyacenes. Multimode problem is also treated in order to investigate how consideration of multimode problem is closely related to the characteristics of the electron-phonon interactions.
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Affiliation(s)
- Takashi Kato
- Institute for Innovative Science and Technology, Graduate School of Engineering, Nagasaki Institute of Applied Science, 3-14 Shuku-machi, Nagasaki 851-0121, Japan.
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