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- Title
Ring Closure Reaction Pathway of a Diarylethene in Solution Using Femtosecond Time‐resolved Fluorescence Spectra.
- Authors
Seo, Kiho; Eom, Intae; Shim, Sangdeok; Kim, Chul Hoon; Joo, Taiha
- Abstract
Photochromic ring closure reaction dynamics of 1,2‐bis(2‐methylbenzo[b]thiophene‐3‐yl)hexafluoro cyclopentene is investigated by means of time‐resolved fluorescence spectra. Compared with a single wavelength probe, direct measurement of the emission spectra during the reaction provides unambiguous and straightforward picture for the ring closure reaction pathway. We observe two different emission bands in the fluorescence of the open ring isomer. From the global analysis for the spectra, we obtain <1 ps time constant for the ring closure reaction in polar solvent. Moreover, the ring closure reaction of the compound takes place entirely on the ultrafast timescale. The unreactive parallel conformer decays to the ground state by 150 ps time constant.
- Subjects
FLUORESCENCE spectroscopy; PHOTOCHROMIC materials; SPECTRUM analysis; DIARYLETHENE; MOLECULAR spectra; POLAR solvents
- Publication
Bulletin of the Korean Chemical Society, 2019, Vol 40, Issue 4, p352
- ISSN
0253-2964
- Publication type
Article
- DOI
10.1002/bkcs.11689