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Optical studies of the 1:1 CT crystal anthracene/TCNB: Mobile triplet excitons at 1.2 K

✍ Scribed by W. Steudle; J.U. Von Schütz; H. Möhwald

Publisher: Elsevier Science
Year: 1978
Tongue: English
Weight: 455 KB
Volume: 54
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(78)85261-0

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✦ Synopsis

The optical emission of the CT complex anthracenels-tetracyanoben,ene (A/TCNB) was investkated between 1.2 K and 300 K. Delayed fluorescence was observed in the whole temperature range. provin, 0 the existence of mobile triplet e\crtons even at 1.2 K. Prompt and delayed fluorescence show a remarkable blue-shift with decreasing temperature of 2 100 cm-' , which can be explained by reabsorption_ The phosphorescence observable below 40 K is due to at least six different kinds of traps and the energy of emission is not temperature dependent_ The CT triplet band phosphorescence could not be detected in emission, but its position was determined by excitation spectroscopy to be 15371 cm-'.

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