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Lee NK, Park S, Yoon MH, Kim ZH, Kim SK. Effect of ring torsion on intramolecular vibrational redistribution dynamics of 1,1'-binaphthyl and 2,2'-binaphthyl. Phys Chem Chem Phys 2012; 14:840-8. [PMID: 22124335 DOI: 10.1039/c1cp22854d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The role of ring torsion in the enhancement of intramolecular vibrational energy redistribution (IVR) in aromatic molecules was investigated by conducting excitation and dispersed fluorescence spectroscopy of 1,1'-binaphthyl (1,1'-BN) and 2,2'-BN. The dispersed fluorescence spectra of 1,1'-BN in the origin region of S(1)-S(0) were well resolved, which presented 25-27 cm(-1) gaps of torsional mode in the ground state. The overall profile of the dispersed spectra of 1,1'-BN is similar to that of naphthalene. In contrast, the spectra of 2,2'-BN were not resolved due to the multitude of the active torsional modes. In both cases, dissipative IVR was observed to take place with a relatively small excess vibrational energy: 237.5 cm(-1) for 1,1'-BN and 658 cm(-1) for 2,2'-BN, which clearly shows that ring torsion efficiently enhances the IVR rate. Ab initio and density functional theory calculations with medium-sized basis sets showed that the torsional potential of 1,1'-BN has a very flat minimum over the range of torsional angles from ca. 60° to 120°, whereas that of 2,2'-BN showed two well-defined potential minima at ca. 40° and 140°, in resemblance to the case of biphenyl. In this work, we propose that aromatic molecules be classified into "strong" and "weak" torsional hindrance cases: molecules with strong hindrance case show shorter torsional progressions and more effective IVR dynamics than do those with weak hindrance.
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Affiliation(s)
- Nam Ki Lee
- Department of Physics and School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology, Pohang, Korea.
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Galievsky VA, Druzhinin SI, Demeter A, Mayer P, Kovalenko SA, Senyushkina TA, Zachariasse KA. Ultrafast Intramolecular Charge Transfer with N-(4-Cyanophenyl)carbazole. Evidence for a LE Precursor and Dual LE + ICT Fluorescence. J Phys Chem A 2010; 114:12622-38. [DOI: 10.1021/jp1070506] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Victor A. Galievsky
- Spektroskopie und Photochemische Kinetik, Max-Planck-Institut für biophysikalische Chemie, 37070 Göttingen, Germany; B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, pr. Nezavisimosti 68, 22072 Minsk, Belarus; Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary; Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, Haus F, 81377 München, Germany; and
| | - Sergey I. Druzhinin
- Spektroskopie und Photochemische Kinetik, Max-Planck-Institut für biophysikalische Chemie, 37070 Göttingen, Germany; B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, pr. Nezavisimosti 68, 22072 Minsk, Belarus; Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary; Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, Haus F, 81377 München, Germany; and
| | - Attila Demeter
- Spektroskopie und Photochemische Kinetik, Max-Planck-Institut für biophysikalische Chemie, 37070 Göttingen, Germany; B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, pr. Nezavisimosti 68, 22072 Minsk, Belarus; Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary; Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, Haus F, 81377 München, Germany; and
| | - Peter Mayer
- Spektroskopie und Photochemische Kinetik, Max-Planck-Institut für biophysikalische Chemie, 37070 Göttingen, Germany; B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, pr. Nezavisimosti 68, 22072 Minsk, Belarus; Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary; Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, Haus F, 81377 München, Germany; and
| | - Sergey A. Kovalenko
- Spektroskopie und Photochemische Kinetik, Max-Planck-Institut für biophysikalische Chemie, 37070 Göttingen, Germany; B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, pr. Nezavisimosti 68, 22072 Minsk, Belarus; Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary; Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, Haus F, 81377 München, Germany; and
| | - Tamara A. Senyushkina
- Spektroskopie und Photochemische Kinetik, Max-Planck-Institut für biophysikalische Chemie, 37070 Göttingen, Germany; B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, pr. Nezavisimosti 68, 22072 Minsk, Belarus; Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary; Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, Haus F, 81377 München, Germany; and
| | - Klaas A. Zachariasse
- Spektroskopie und Photochemische Kinetik, Max-Planck-Institut für biophysikalische Chemie, 37070 Göttingen, Germany; B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, pr. Nezavisimosti 68, 22072 Minsk, Belarus; Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary; Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, Haus F, 81377 München, Germany; and
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Martin MM, Plaza P, Changenet-Barret P, Siemiarczuk A. UV−vis Subpicosecond Spectroscopy of 4-(9-Anthryl)-N,N‘-dimethylaniline in Polar and Nonpolar Solvents: A Two-Dimensional View of the Photodynamics. J Phys Chem A 2002. [DOI: 10.1021/jp013107x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Monique M. Martin
- UMR CNRS-ENS 8640 PASTEUR, Département de Chimie, Ecole Normale Supérieure, 24 rue Lhomond, 75231 Paris Cedex 05, France
| | - Pascal Plaza
- UMR CNRS-ENS 8640 PASTEUR, Département de Chimie, Ecole Normale Supérieure, 24 rue Lhomond, 75231 Paris Cedex 05, France
| | - Pascale Changenet-Barret
- UMR CNRS-ENS 8640 PASTEUR, Département de Chimie, Ecole Normale Supérieure, 24 rue Lhomond, 75231 Paris Cedex 05, France
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