By Edited by Tianharry Chang

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Photochromism is defined as a reversible transformation between two forms with different absorption spectra. The basic merit of diarylethene derivatives is that they can undergo a photoinduced reversible isomerization process between two isomers upon irradiation with light of appropriate wavelength. The two isomers of diarylethenes differ from each other not only in their absorption spectra, but in many physical and chemical properties including geometry, refractive index, as well as oxidation/reduction potential.

M. Wang: J. Photochem. Photobio. A: Chem. Vol. 214 (2010), p. 230. Z. J. J. Miao: J. Phys. Org. Chem. Vol. 22 (2009), p. 954. S. Z. Pu, B. K. Xu: Canadian J. of Chem. Vol. 12. Z. Z. Wang and H. Tian: Chem. Commun. (2002), p. 1060. 27 Synthesis and Fluorescence Switching of a Photochromic Diarylethene Bearing chlorine Atoms Ming Liu, Gang Liu*, Congbin Fan, Shiqiang Cui Jiangxi Key Laboratory of Organic Chemistry Jiangxi Science and Technology Normal University Nanchang 330013, P. R. cn Keywords: Diarylethene; Photochromism; Fatigue-resistant; Fluorescence Abstract.

3553 [17]T. Fukaminato, T. Kawai, S. Kobatake and M. Irie: J. Phys. Chem. B, Vol. 107 (2003), p. com Keywords: Diarylethene, Photochromism, Fluorescence switching. Abstract. An unsymmetrical diarylethene derivative was synthesized and its photochromic properties and fluorescence switch were investigated in detail. The results showed that this compound exhibited reversible photochromism, undergoing reversible cyclization and cycloreversion reactions upon alternating irradiation with UV and visible light both in solution and in PMMA film, and its absorption maxima were observed at 524 nm in hexane and at 532 nm in PMMA amorphous film, respectively, upon irradiation with 297 nm UV light.

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Advances in Materials Science by Edited by Tianharry Chang

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