Triplet Energy of 2, 2??Dimethylisoindene from Electron??Energy??Loss Spectroscopy and Photoinduced Triplet Energy Transfer

M Allan, KR Asmis, SE Houar, E Haselbach…

Index: Allan, Michael; Asmis, Knut R.; El houar, Sarah; Haselbach, Edwin; Capponi, Marco; et al. Helvetica Chimica Acta, 1994 , vol. 77, # 6 p. 1541 - 1548

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Abstract

Abstract The excited electronic states of 2, 2-dimethylisoindene (1) have been studied by electron-energy-loss spectroscopy. Its vertical gas-phase triplet (1 3 B 2), and singlet (1 1 B 2) excitation energies are 1.61 and 3.19 eV, respectively. The excited states are thus lowered by 0.49 eV and 1.21 eV, respectively, when compared to the corresponding states of (all-E)-octatetraene, which serves as a reference compound. These shifts are partially ...