The Relations Between the Fluorescence and Absorption Properties of Organic Molecules

Measurements have been made of the fluorescence spectra, lifetimes and quantum efficiencies and of the absorption spectra of several organic molecules in dilute solution. These have been used to test the validity of the theoretical relation between the radiative lifetime and the absorption intensity...

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Bibliographic Details
Published in:Proceedings of the Royal Society of London. Series A, Mathematical and physical sciences Mathematical and physical sciences, 1963-08, Vol.275 (1360), p.135-148
Main Authors: Birks, J. B., Dyson, D. J.
Format: Article
Language:English
Subjects:
Absorption spectra
Fluorescence
Lamps
Molecules
Optical filters
Phenyls
Quantum efficiency
Rotational spectra
Solvents
Spectral bands
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Summary:Measurements have been made of the fluorescence spectra, lifetimes and quantum efficiencies and of the absorption spectra of several organic molecules in dilute solution. These have been used to test the validity of the theoretical relation between the radiative lifetime and the absorption intensity, and of the mirror-image relation between the fluorescence and absorption spectra. The former is found to be valid provided there is no major change in the nuclear configuration between the ground and excited states, but the latter is usually more sensitive to such changes. The effect of a change in nuclear configuration, which is particularly marked in the higher diphenylpolyenes, is to increase the radiative lifetime and to distort the spectral intensity distribution.
ISSN:1364-5021
0080-4630
1471-2946
2053-9169
DOI:10.1098/rspa.1963.0159