Solvent Polarity Dependence of Photochromic Reactions of a Diarylethene Derivative As Revealed by Steady-State and Transient Spectroscopies
| Autor: | Yukihide Ishibashi, Toshiyuki Umesato, Tetsuro Katayama, Tsuyoshi Asahi, Masahiro Irie, Yusuke Yoneda, Hikaru Sotome, Seiya Kobatake, Mika Fujiwara, Hiroshi Miyasaka, Kanako Une |
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| Rok vydání: | 2016 |
| Předmět: |
Quantitative Biology::Biomolecules
Quantum yield 02 engineering and technology Conical intersection 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Photochromism General Energy Diarylethene chemistry Organic chemistry Steady state (chemistry) Physics::Chemical Physics Physical and Theoretical Chemistry 0210 nano-technology Ground state Conformational isomerism Derivative (chemistry) |
| Zdroj: | The Journal of Physical Chemistry C. 120:1170-1177 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.5b08504 |
| Popis: | Solvent polarity dependence of photochromic reactions such as cyclization and cycloreversion of a photochromic diarylethene derivative, 1,2-bis(2-methyl-3-benzothienyl)perfluorocyclopentene, was investigated by steady-state spectroscopic and femtosecond laser photolysis methods. For the cyclization reaction, it was revealed that the quantum yield decreased with an increase in solvent polarities, mainly due to the decrease in the fraction of the conformer with C2 symmetry favorable for the cyclization. This result indicated that the branching ratio for the cyclization and the deactivation to the open-ring isomer at the conical intersection was almost independent of the solvent polarity. On the other hand, it was found for the cycloreversion process that the closed-ring isomer in the S1 state rapidly deactivated into the ground state in competition with the activated process leading to the conical intersection providing a pathway toward both open- and closed-ring minima in the ground state. The cycloreversi... |
| Databáze: | OpenAIRE |
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