EXTERNAL HEAVY ATOM EFFECTS ON THE S1 AND T1 ELECTRONIC STATES OF INDOLE |
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Authors: | Ginette Lessard Gilles Durocher |
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Affiliation: | Département de Chimie Universitéde Montréal C.P. 6210. Succ. A Montréal. Quebec. Canada H3C 3VI |
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Abstract: | Abstract— The absorption, fluorescence and phosphorescence spectra along with the phosphorescence decay function of indole perturbed by various amounts of halocarbons have been studied in a 1:1 ethanol-ether glass at 77 K. For carbon tetrachloride. chloroform, halothane and methylene chloride used as quenchers. the biexponential nature of the phosphorescence decay prompted us to assume the existence of a triplet state complex (exciplex) between indole and the halocarbons. On the other hand. propyl bromide gives rise to a non-exponential decay and to an increase in the phosphorescence intensity suggesting the occurrence of a normal external spin-orbital coupling interaction between indole and the propyl bromide molecule. |
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