Biphenyl in a cooled alcoholic solution shows structured TT absorption bands, weak in the visible and strong in the UV with a maximum at 3'7OOA and en Er= 50 000 litre mole-1 cm-I. Calculations using the PPP SCF method with a large configuration interaction are done using a planar model. The influen
Triplet triplet absorption of biphenyl and related compounds
✍ Scribed by D. Lavalette; C. Tetreau
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 574 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Tripkt triplet absorption spectra ol biphenyl, carbszolc and phenanthre;e have deen studied.in rigid glass at 77 K.
,&cilk~or strcng~s kmd polarizations are reported. A theoretical study has been performed using the Par&r-Parr-Pople appro+mation in order to support.the band assignments.
📜 SIMILAR VOLUMES
Triplet-triplet absorption of biphenylene was sensitized by naphthalene. A band is observed at 29 500 cm-l and is assigned to a predicted 3B& + 3B& transition. Triplet biphenylene has a lifetime of 100 psec in solution. Nonradiative processes are thought to affect mainly the first singlet state of b
## Abstract The triplet‐triplet absorption spectra of __p__‐__N, N__‐dimethylnitroaniline, 4‐nitro‐__p__‐terphenyl, 1‐amino‐4‐nitrofluorene, 5‐nitroacenaphthene, __trans__‐1‐(4‐methoxy‐phenyl)‐2‐nitroethylene (MeONS), and __trans__‐1‐(4‐dimethylaminophenyl)‐2‐nitroethylene (DANS) in EPA glass at 77
Triplet-triplet absorption spectra of coumarin and 7-hydrox~coumarin in rigid alcoholic solutions at 1 IFE; were reco&ed. Measurement of ground state depletion allowed the determination of the molar extinction coefficients of the triplet bands, for both compounds. CNDO/S calculations of the triplet-