EXTERNAL HEAVY-ATOM INDUCED PHOSPHORESCENCE EMISSION OF FULLERENES - THE ENERGY OF TRIPLET C-60

ZENG, Y. and Biczók, László and LINSCHITZ, H. (1992) EXTERNAL HEAVY-ATOM INDUCED PHOSPHORESCENCE EMISSION OF FULLERENES - THE ENERGY OF TRIPLET C-60. JOURNAL OF PHYSICAL CHEMISTRY US, 96 (13). pp. 5237-5239. ISSN 0022-3654

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Abstract

The external heavy atom induced phosphorescence of C60 and C70 is obtained at 77 K in a glass containing ethyl iodide and gives 12 690 +/- 30 cm-1 as a precise lower limit for thc energy of triplet C60. Triplet lifetime measurements show that the heavy atom effect is relatively much greater on the S1 --> T1 than on the T1 --> S0 radiationless transitions, as expected from the smaller Franck-Condon constraints in the former process.

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