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Abstract 1,2-Bis(2,4-dimethyl-5-phenyl-3-thienyl)perfluorocyclopentene was found to form an amorphous state in bulk by introducing diphenylamino substituents at both ends of the molecule. The glass transition temperature was as high as 103 °C. The amorphous film exhibited reversible color and refractive index changes by alternate irradiation with ultraviolet and visible light.
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Fukudome et al. (2001) studied this question.
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