Photophysics of Derivatives of 3‑Hydroxybenzo[c]coumarin

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 absorpt...

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Published inThe journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Vol. 119; no. 34; pp. 9051 - 9058
Main Authors Deperasińska, Irena, Makarewicz, Artur, Krzeszewski, Maciej, Gryko, Daniel T, Kozankiewicz, Boleslaw
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 27.08.2015
Subjects
Bearing
Derivatives
Emission
Fluorescence
Mathematical analysis
Phenols
Physical chemistry
Spectroscopy
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Summary: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.
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ISSN:1089-5639
1520-5215
DOI:10.1021/acs.jpca.5b04874