Journal
CHEMICAL PHYSICS
Volume 459, Issue -, Pages 65-71Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chemphys.2015.08.003
Keywords
Circulene; Vibronic effects; Heteroannelated octatetraenes; Franck-Condon factor; Herzberg-Teller approximation; Shpolsky spectra
Funding
- Ministry of Education and Science of Ukraine [0115U000637]
- Chinese Academy of Science
- [N8.2.44.2015]
Ask authors/readers for more resources
Calculations of vibronic structure in the electronic absorption spectra are carried out for the series of heteroannelated octatetraenes on the basis of density functional theory method. Both Franck-Condon and Herzberg-Teller approaches have been used for estimation of frequency and intensity of vibronic bands in the simulated absorption spectra with respect to the S-0 -> S-1 electronic transition. The key result discussed in this work is that the electronic transition into the first singlet excited states is vibronicallyactive in the absorption spectra for all studied circulenes in a good agreement with experimental observations. We have confirmed our previous assumption that the first (low-lying) weak absorption maximum in the spectra of tetra-tert-butyltetraoxa[8] circulene and dithieno[3,4-b: 3',4'-d]thiophene-annelated cyclooctatetraene can be assigned just for the S-0 -> S-1 transition which produce the next more intense vibronic satellite. In the case of aza[8] circulenes the S-0 -> S-1 transition is symmetry allowed and the corresponding vibronic bands are less intense relative to 0-0 band. (C) 2015 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available