Diarylethene compounds, photochromic diarylethene-based copolymers and methods for producing them

摘要

PURPOSE: A diarylethene copolymer is prepared which has a good mechanical property, rapid photochromism and processability. CONSTITUTION: The diarylethene copolymer(formula 1: R1 is hydrogen atom, C1-22 alkyl, fluorine, substituted or unsubstituted phenyl or phenylalkyl; R2 is C1-22 alkylene substituted or unsubstituted fluorine; R3 is oxygen atom or C1-3 alkylene substituted or unsubstituted fluorine; R4 is same to R1 or C1-22 alkylene or alkyleneoxyalkyl ester substituted or unsubstituted fluorine; R5 is same to R2 or C1-22 alkyleneoxy group substituted or unsubstituted fluorine; X and Y are independently oxygen, nitrogen, or sulfur atom; Z is fluorine substituted or not substituted methylene or carbonyl; o, p, q, and r are mole ratios; o+p+q+r=1) is prepared.