Morphology change of diarylethene derivatives having benzofuran derivatives—Photoinduced crystallization

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 °C. After heating at 130 °C, the liquid did not crystallize below 40 °...

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Bibliographic Details
Published in:Journal of photochemistry and photobiology. A, Chemistry. Chemistry., 2010-06, Vol.213 (2), p.141-146
Main Authors: Yamaguchi, Tadatsugu, Nanba, Koji, Ozeki, Toru, Irie, Setsuko, Irie, Masahiro
Format: Article
Language:English
Subjects:
Benzofuran derivative
Diarylethene
Morphology change
Photochromism
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Summary: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 °C. After heating at 130 °C, the liquid did not crystallize below 40 °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-dodecyl derivative ( 3a).
ISSN:1010-6030
1873-2666
DOI:10.1016/j.jphotochem.2010.05.013