Hot luminescence spectra of quinizarin in a supersonic expansion

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...

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Bibliographic Details
Published in:Chemical physics letters 1984-01, Vol.109 (1), p.1-6
Main Author: Subbi, J.
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Exact sciences and technology
Fluorescence and phosphorescence
radiationless transitions, quenching (intersystem crossing, internal conversion)
Molecular properties and interactions with photons
Physics
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Summary: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.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(84)85389-0