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Triplet-triplet absorption of biphenyl

โœ Scribed by Y.H. Meyer; R. Astier; J.M. Leclercq

Publisher
Elsevier Science
Year
1970
Tongue
English
Weight
334 KB
Volume
4
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

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 influence of the extension of the configuration interaction and of the planarity of the molecule in the triplet state on the calcu+lated enftrgies+and oscillator strengths+are tested. The bends are tentatively assigned to the week Bss -Blu and Ag -Blu and the strong Ai -Blu transitions.

๐Ÿ“œ SIMILAR VOLUMES

Triplet triplet absorption of biphenyl a
Triplet triplet absorption of biphenyl and related compounds
โœ D. Lavalette; C. Tetreau ๐Ÿ“‚ Article ๐Ÿ“… 1974 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 574 KB

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.

Sensitized triplet-triplet absorption of
Sensitized triplet-triplet absorption of biphenylene
โœ C. Tetreau; D. Lavalette; E.J. Land; F. Peradejordi ๐Ÿ“‚ Article ๐Ÿ“… 1972 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 402 KB

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

Weak tripletโ€”triplet absorption bands of
Weak tripletโ€”triplet absorption bands of naphthalene
โœ R. Astier; Y.H. Meyer ๐Ÿ“‚ Article ๐Ÿ“… 1971 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 293 KB

Transient aburption bands are observed with naphtbakne in solution at 3200-3400 A. in the nme region a~ in the gas phase. It is shown that they do not belong to the naphthalene TT spectrum. Weak and structured 'IT bands are observed between 4300 and 6500 A with methyl derivatives as well as with nap