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Jpn. J. Appl. Phys. 38 (1999) pp. L1194-L1196  |Next Article|  |Table of Contents|
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Refractive Index Change of Dithienylethene in Bulk Amorphous Solid Phase

Tsuyoshi Kawai, Norio Fukuda, Dieter Gröschl1, Seiya Kobatake2 and Masahiro Irie

Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
1Fukuoka IST, Fukuoka Industry, Science & Technology Foundation, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
2CREST, Japan Science and Technology Corporation, Higashi-ku, Fukuoka 812-8581, Japan

(Received July 13, 1999; accepted for publication August 4, 1999)

A diarylethene derivative, 1,2-bis(5-(4-tert-butylphenyl)-2,4-dimethylthiophen-3-yl)- 3,3,4,4,5,5-hexafluorocyclopentene, forms stable amorphous solid with Tg of 68°C. Reversible photochromism in the amorphous solid film is observed upon alternate irradiation with UV (e.g. 313 nm) light and visible (580 nm) light. The refractive index of the solid film changed by as much as 3.8×10-2 along with the photoisomerization.

KEYWORDS: photochromism, amorphous, refractive index, diarylethene, glass
URL: http://jjap.ipap.jp/link?JJAP/38/L1194/
DOI: 10.1143/JJAP.38.L1194


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