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Hot luminescence spectra of quinizarin in a supersonic expansion

Authors
Journal
Chemical Physics Letters
0009-2614
Publisher
Elsevier
Publication Date
Volume
109
Issue
1
Identifiers
DOI: 10.1016/0009-2614(84)85389-0

Abstract

Abstract The fluorescence excitation spectrum and fluorescence spectra from 25 different vibrational levels of the S 1 state of 1,4-dihydroxyanthraquinone were measured. From these spectra, the frequencies of non-totally symmetric vibrations in the S 0 state were deduced. Strong mixing of normal coordinates under electronic excitation was observed. Strong anharmonicity of vibrations of the hydrogen bond was evidenced by pronounced Fermi resonance as low as 530 cm −1 above the 0-0 energy and involving levels more than 10 cm −1 apart.

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