Trifluoromethyl-substituted norbornadiene, useful solar energy material

Chemistry Letters

Volumn , Issue 9, 1999, Pages 897-898

  Nagai, Takabumi ^a   Takahashi, Ikuko ^a   Shimada, Miwa ^a  

^a DAIKIN INDUSTRIES LTD   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0033248543     PISSN: 03667022     EISSN: None     Source Type: Journal    
DOI: 10.1246/cl.1999.897     Document Type: Article

References (19)

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12. 1a was synthesized in 91% yield by hexafluoro-2-butyn with 2,3-bis-(p-methoxyphenyl)-5,5-dimethylcyclopenta-1,3-diene, which was prepared according to the literature: K. Hirao, A. Yamashita, A. Ando, H. Yamamoto, H. Iijima, T. Hamada, and O. Yonemitsu, J. Chem. Res., 1987, (M), 1401.
13. Compounds 5, 6 were synthesized according to Ref.Sb.
14. (formula presented) 8 The PMMA solid film doped with 1 was prepared according to Ref.3b.
15. A typical procedure for photochemical isomerization and thermal reversion of solid film is as follows. The experiment was performed under argon atmosphere. Initially, the film doped with NBDs was irradiated by a 500-W xenon lamp (Ushio Electric Co., UI-502Q) until the disappearance of the absorbance of the absorption maxima. Then, the film doped with the corresponding QCs was heated on a hot plate until the reversion of the absorbance of the NBDs (1a : irradiated for 10 min, then heated at 130°C for 40 min; 1c : irradiated for 1min, then heated at 120°C for 20 min; 1f : irradiated for 1min, then heated at 80°C for 15 min).
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19. max of the NBDs on the 1st and nth cycles of reactions, respectively.