A heavy-atom effect on the cis-trans photoisomerization of bisformyl-substituted trans,trans,trans-1,6-diphenyl-1,3,5-hexatriene

Chemistry Letters

Volumn , Issue 7, 1999, Pages 587-588

  Sonoda, Yoriko ^a   Kawanishi, Yuji ^a   Sakuragi, Masako ^a  

^a NATL INST OF MAT AND CHEM RES   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0033245455     PISSN: 03667022     EISSN: None     Source Type: Journal    
DOI: 10.1246/cl.1999.587     Document Type: Article

References (19)

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10. Concentration of ttt-1 was kept high enough to minimize the fraction of light absorbed by the solvent, as EtI absorbs to a small extent at 420 nm (< 0.01 OD for [EtI] = 3.13 M in THF solution). Optical density of ttt-1 in THF-EtI mixed solvent was approximately 2.0 at 420 nm.
11. Since the cis isomers were thermally unstable to return to ttt-1 on heating in the presence of EtI, the THF - EtI solvent was quickly evaporated from the irradiated sample solution at 0-10 °C. The resulting residue in acetonitrile was subjected to HPLC analysis.
12. 4).
13. T with increasing [EtI] shows that not only S → T but also T → S intersystem crossing rates were enhanced by the heavy-atom effect of EtI.
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