Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 203, Issue -, Pages 375-382Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2018.05.080
Keywords
Cytisine; UV-VIS; Fluorescence; Conformers
Categories
Funding
- NCN project (National Science Centre Poland) [2013/11/B/ST5/01681]
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Spectral and photophysical properties of (-)-cytisine that is used as a smoking cessation aid, and which derivatives are promising tools in a treatment of neurological diseases, were investigated in acetonitrile, non-specifically interacting solvent with a polarity similar to water. The two chair conformers of cytisine were found the most stable in the ground state So and the lowest excited singlet state S-1(pi,pi*), wherein axial one was characterized by a significantly larger abundance, fluorescence lifetime 0.15 ns and fluorescence quantum yield 0.008. The S-1(pi,pi*) excited state of both cytisine conformers deactivated almost exclusively via internal conversion. (C) 2018 Elsevier B.V. All rights reserved.
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