Hydrogen-bonded 4H-1-benzopyrane-4-thione–water complexes properties in the S2 excited state: the mechanism and dynamics of deactivation

Literature Information

Publication Date 2015-11-13
DOI 10.1039/C5CP05427C
Impact Factor 3.676
Authors

E. Krystkowiak, R. A. Bachorz, A. Maciejewski


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Abstract

Unexpected results of spectral emission and photophysical study of S2-excited 4H-1-benzopyrane-4-thione (BPT) in water solution were explained by intermolecular hydrogen bonding. There are at least two types of BPT–water complexes that participate in the S2-fluorescence similarly as in S0 → S2 absorption. They both deactivate with high efficiency in internal conversion S2 → S1 and in intersystem crossing S1 → T1 processes.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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