Photochromism of 1,2-Bis(2-alkyl-1-benzofuran-3-yl)perfluorocyclopentene Derivatives
作者:Tadatsugu Yamaguchi、Masahiro Irie
DOI:10.1002/ejoc.200600011
日期:2006.7
[reaction: see text] Photochromic diarylethene derivatives having benzofuran heteroaryl groups, bis(2-methyl-1-benzofuran-3-yl)perfluorocyclopentene and bis(2-butyl-1-benzofuran-3-yl)perfluorocyclopentene, were synthesized, and their photochromic performance was examined in hexane solution as well as in the single-crystalline phase. The compounds exhibited photochromic reactivity even in the single-crystalline
We have synthesized three diarylethene derivatives - 1,2-bis(2-(4-n-alkylphenyl)benzofuran-3-yl)ethenes (1a-3a). we have observed the morphology changes of the melted diarylethenes after heating. The crystal of 2a melts at 102 degrees C. After heating at 130 degrees C, the liquid did not crystallize below 40 degrees C for more than 3 days because of the temperature above the eutectic point. When the liquid was irradiated with 365 nm light, the photoirradiated area crystallized, because of the generation of 2b. After the sample was irradiated with visible light, the crystals changed to a colorless liquid. Photoinduced crystallization was also observed for the 4-n-clodecyl derivative (3a). (C) 2010 Elsevier B.V. All rights reserved.
Photochromism of Bis(2-alkyl-1-benzofuran-3-yl)perfluorocyclopentene Derivatives
作者:Tadatsugu Yamaguchi、Masahiro Irie
DOI:10.1021/jo051372z
日期:2005.12.1
Photochromic diarylethene derivatives having benzofuran heteroaryl groups, bis(2-methyl-1-benzofuran-3-yl)perfluorocyclopentene and bis(2-butyl-1-benzofuran-3-yl)perfluorocyclopentene, were synthesized, and their photochromic performance was examined in hexane solution as well as in the single-crystalline phase. The compounds exhibited photochromic reactivity even in the single-crystalline phase.