A Raman spectroscopic study of photochromic benzothiazolium dyes |
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| Institution: | 1. School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, PR China;2. School of Chemistry & Chemical Engineering, Jiangxi Science & Technology Normal University, Nanchang 330013, PR China;3. College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, PR China |
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| Abstract: | Resonance Raman spectra using several excitation wavelengths have been obtained in the region 300–1750 cm?1 for two photochromic benzothiazolium dyes containing a crown ether ring. Bands arising from both cis- and trans-isomers have been distinguished by comparing the spectra observed at different resonances and under different sample conditions. Preliminary assignments of the bands have been made, allowing insight into the changes in structure and bonding which occur on photoisomerization. |
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