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Analysis of Non‐Exponential Multi‐Component Emission of Aryl Ketones: The Cases for the Phosphorescence Spectra of Beta‐Naphthil and Benzophenone
Author(s) -
Chow Tahsin J.,
Marshall Wilson R.
Publication year - 1984
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.198400035
Subject(s) - phosphorescence , chemistry , benzophenone , excited state , spectral line , emission spectrum , photochemistry , exponential function , wavelength , kinetic energy , fluorescence , annihilation , exponential decay , analytical chemistry (journal) , atomic physics , optoelectronics , optics , physics , organic chemistry , mathematical analysis , mathematics , quantum mechanics , astronomy , nuclear physics
The dual emission spectra of β‐naphthil in two different glasses at 77° K have been resolved to their individual components by a computerized kinetic phosphorescence spectrometry system. Both the time‐resolved spectrum which reveals the kinetic behavior of the excited states and the wavelength‐resolved spectrum which tells the nature of the emitting species are obtained. Several possible emission mechanisms are discussed based on the informations gathered through the resolution processes. Triplet‐triplet annihilation is shown to exist in solutions of benzophenone as well as in solutions of β‐naphthil. As concluded from the results of time‐resolved study, such kind of interaction is responsible for the non‐exponential distorsion of the decays. And according to the wavelength‐resolved studies, transoid and cisoid conformational isomers seem to accout for the sources of the dual emission of β‐naphthil.