Five-order-of-magnitude reduction of the triplet lifetimes of N-heterocycles by complexation to a trinuclear mercury complex.
J Am Chem Soc
; 127(35): 12166-7, 2005 Sep 07.
Article
em En
| MEDLINE
| ID: mdl-16131162
ABSTRACT
The complexation of N-methylcarbazole and N-methylindole by trimeric perfluoro-o-phenylene mercury (1), which can be readily observed in CH2Cl2 solution, leads to the formation of [1.N-methylindole] (2) and [1.N-methylcarbazole] (3) as solid adducts. The solid-state photoluminescence spectra of these adducts show intense emission bands attributed to monomer phosphorescence of N-methylindole and N-methylcarbazole, respectively, with microsecond lifetimes. Remarkably, the triplet lifetimes of the heterocycles in 2 and 3 are shortened by 5 orders of magnitude when compared to those of the free heterocycles. These results are rationalized by invoking the combined external and internal spin-orbit coupling perturbation provided by the mercury and nitrogen atoms.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
J Am Chem Soc
Ano de publicação:
2005
Tipo de documento:
Article
País de afiliação:
Estados Unidos