title: Photophysics of Derivatives of 3-Hydroxybenzo[c]coumarin.
abstract: The photophysical studies of two phenols, derivatives of 3-hydroxybenzo[c]coumarin, were performed in n-nonane matrix at 5 K. Unstructured fluorescence spectrum of the derivative bearing a salicylaldehyde moiety, whose onset is shifted by ca. 3000 cm(-1) to lower energy in respect to that of absorption, and short decay time of this emission (0.75 ns) suggested the occurrence of excited-state intramolecular proton transfer (ESIPT). The experimental results were interpreted with the aid of quantum chemistry calculations performed with the DFT and TDDFT/B3LYP/6-31++G(d,p) methods.
authors.affiliation: Institute of Physics, Polish Academy of Sciences , Al. Lotników 32/46, 02-668 Warsaw, Poland.
authors.forename: Irena
authors.initials: I
authors.lastname: Deperasińska
authors.affiliation: Institute of Physics, Polish Academy of Sciences , Al. Lotników 32/46, 02-668 Warsaw, Poland.
authors.forename: Artur
authors.initials: A
authors.lastname: Makarewicz
authors.affiliation: Institute of Organic Chemistry, Polish Academy of Sciences Kasprzaka 44/52, 01-224 Warsaw, Poland.
authors.forename: Maciej
authors.initials: M
authors.lastname: Krzeszewski
authors.affiliation: Institute of Organic Chemistry, Polish Academy of Sciences Kasprzaka 44/52, 01-224 Warsaw, Poland.
authors.forename: Daniel T
authors.initials: DT
authors.lastname: Gryko
authors.affiliation: Institute of Physics, Polish Academy of Sciences , Al. Lotników 32/46, 02-668 Warsaw, Poland.
authors.forename: Boleslaw
authors.initials: B
authors.lastname: Kozankiewicz