Phosphorescence of Phenylcarboxylic Acids and Their Salts
- 1 April 1970
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 52 (7), 3399-3402
- https://doi.org/10.1063/1.1673502
Abstract
The phosphorescence spectra and lifetimes of a series of carboxylic acids, phenyl–(CH2) n –COOH, and their salts have been measured. It is shown, contrary to accepted attitudes, that the lowest triplet state of benzoic acid is not an excitation localized on the benzene ring but involves considerable delocalization onto the carboxyl group. The lowest triplet energy of the carboxyl group and its radiative lifetime are estimated as 29.7 kK and 4 sec, respectively.Keywords
This publication has 6 references indexed in Scilit:
- Phosphorescence Decay of Benzene and Methylbenzene DerivativesThe Journal of Chemical Physics, 1969
- Triplet State of the Nitrite Molecule–IonThe Journal of Chemical Physics, 1968
- Distortions of the π-Electron System in Monosubstituted Benzenes1Journal of the American Chemical Society, 1966
- The phosphorescence spectrum of benzoic acid, methyl benzoate and benzamide at 90°KSpectrochimica Acta, 1963
- The possibilities of phosphorescence measurement in chemical analysis: tests with a new instrumentThe Analyst, 1962
- Triplet-Singlet Transitions in Organic Molecules. Lifetime Measurements of the Triplet StateThe Journal of Chemical Physics, 1949