Fluorescence spectroscopic studies on the radical cations of tetrathiafulvalenes

Fluorescence spectroscopic studies have been performed on the radical cations of tetrathiafulvalene (TTF), 4,4′-dimethyl-5,5′-diphenyltetrathiafulvalene (DMDP–TTF), bis-(4,5-dihydronaphtho-[1,2d]-tetrathiafulvalene) (BDHN–TTF) and bis-(ethylenedithio)-tetrathiafulvalene (BEDT–TTF) in low-temperature...

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Published inChemical physics Vol. 248; no. 2; pp. 263 - 271
Main Authors Zimmer, Klaus, Gödicke, Björn, Hoppmeier, Markus, Meyer, Hermann, Schweig, Armin
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.10.1999
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Summary:Fluorescence spectroscopic studies have been performed on the radical cations of tetrathiafulvalene (TTF), 4,4′-dimethyl-5,5′-diphenyltetrathiafulvalene (DMDP–TTF), bis-(4,5-dihydronaphtho-[1,2d]-tetrathiafulvalene) (BDHN–TTF) and bis-(ethylenedithio)-tetrathiafulvalene (BEDT–TTF) in low-temperature organic glasses. For the first time emission and excitation spectra have been obtained for radical cations of this class of compounds. Only in the case of BEDT–TTF ·+ fluorescence could not be detected. The luminescence spectra have been related to the corresponding UV/Vis/NIR absorption spectra and absorption data obtained using the LNDO/S PERTCI method. For DMDP–TTF ·+ the fluorescence lifetime (1.09 ns) has been measured and the fluorescence quantum yield (5×10 −3) has been estimated.
ISSN:0301-0104
DOI:10.1016/S0301-0104(99)00246-3