An unusual temperature ,effect on ihe intensity of fluorescence of 9-carbonyl derivhtives of anthracene is observed: ihis is interpreted in terms of an intersystem crossing process from the lowest excited singlet state, !+r to the higher excited triplet state T,&\_ ,. Investigations of temperature
Intersystem crossing of the carbonyl compounds of anthracene. (II). Derivatives of 9-benzoylanthracene
โ Scribed by T. Matsumoto; M. Sato; S. Hirayama
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- English
- Weight
- 334 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
โฆ Synopsis
Among several derivatives of 9-b%zoylanthracene investigated, only 9-bcnzoyl lC-cyanoanthraccnc having the largest Ao-_O value showed a large temperature effect on the fluorescence intensity. This fact confirmed our previous supposition that in 9-czrbonyl dcrivativcs of anthracene there is efficient intersystem crossing S,,* -Tn,+.
๐ SIMILAR VOLUMES
The major jR#g~a~ eIemnic ~l~a~~~ mrxkaaism from the first el~t~Rj~ly excited St singleE manifold of anthracene and its isotopic and chemical derivatives involves intersystem crossing (ISC) [ 1-15 1, which proceeds via two parallel mechanisms: (1) DirectSi-+ ISC [Sj to thestatistical first triplet
Fluorescence lifetimes Tf of anthracene, 9.10-diphenylanthracene and S-methylanthracene have heen measured as a function of pressure to 30 kbar at 77oK. An anomalous Whree-fold increase in rfr OEIserved for anthracene at high pressures. is attributed to prohibition of SI--WT2 intersystem crossing as
The intersystem crossing decay constants from the 3Bzu state into the ground state of anthrauxeil~o in a phenzzine crystal have been determined by magnetic resanmae techniques nt lSยฐK both nt hisI\_ magnetic field and, by a parameterization procedure, at zzo magnetic fie!d, A comparison of the anthr