Applying methods developed for single molecule spectroscopy to small ensembles, we have recorded high-resolution fluorescence-excitation spectra for pentacene in all substitutional sites of a p-terphenyl single crystal. The difference in intersystem crossing efficiency for pentacene molecules in the
Vibronically induced intersystem crossing in pentacene in p-terphenyl and benzoic acid crystals
β Scribed by Carola Kryschi; Birgit Wagner; Wolfgang Gorgas; Dankward Schmid
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 329 KB
- Volume
- 53
- Category
- Article
- ISSN
- 0022-2313
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We investigated pentacenedoped pterphenyl crystals with different degrees of disorder as evidenced by the inhomogeneous broadening of the O,-site distribution. Single pentacene molecules were detected in the wings of 0, by fluorescence excitation spectroscopy. The ISC rates for a number of single mo
Electronically controlled photonecho relaxation measurcments, using two nitrogcn pumped dye-lasers, are reported for mlsed crystals of pΓ«ntaccne-/zla and -dl4 in p-terphenyl-hm at 1.5 K. In dflute mixed crystals (ca. 10-\* M) the photonecho lifetime is found to bc exclusively dctermined by the fluor