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Vibronic coupling and singlet-triplet splitting in aromatic dinegative ions

1967; Elsevier BV; Volume: 1; Issue: 3 Linguagem: Inglês

10.1016/0009-2614(67)85034-6

1873-4448

P. L. Nordio, M. Rossi, G. Giacometti,

Photochemistry and Electron Transfer Studies

Abstract An explanation is offered for the observed fact that for dinegative ions of coronene and 18-annulene the ground state is a singlet instead of a triplet. The explanation involves vibronic mixing of nearly degenerate singlet states, resulting in stabilization of one singlet with respect to the triplet state.