title: Hydrogen-bonded 4H-1-benzopyrane-4-thione-water complexes properties in the S2 excited state: the mechanism and dynamics of deactivation.
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.
authors.affiliation: Faculty of Chemistry, Adam Mickiewicz University in Poznań, Poznań, Poland. ewakryst@amu.edu.pl.
authors.forename: E
authors.initials: E
authors.lastname: Krystkowiak
authors.forename: R A
authors.initials: RA
authors.lastname: Bachorz
authors.forename: A
authors.initials: A
authors.lastname: Maciejewski