The location, polarization and assignment of low lying excited triplet states in pyrene

被引:27
作者
Langelaar, J. [1 ]
Beek, J. Wegdam-Van [1 ]
Ten Brink, H. [1 ]
Van Voorst, J. D. W. [1 ]
机构
[1] Univ Amsterdam, Chem Phys Lab, NL-1012 WX Amsterdam, Netherlands
关键词
D O I
10.1016/0009-2614(70)80185-3
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
It is concluded that the T-n <- T-1 absorption spectrum in the visible and near infrared is due to four electronic transitions, for which the 0-0 transitions are located at 10 300, approximate to 16300. 19 200 and 24 200 cm(-1). They are assigned to the B-3(3g)+ <- B-3(2u)+. (3)A(g)(+) <- B-3(2u)+, B-3(3g)- - B-3(2u)+ and (3)A(g)(-) <- B-3(2u)+ transitions respectively. The B-3(3g)+ state is shown to be situated only 400 +/- 100 cm(-1) above the first excited singlet state. which may explain the reported temperature dependent part of the intersystem crossing rate.
引用
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页码:368 / 370
页数:3
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