abstract |
Thermally useful photochromic and / or dichroic properties in at least one state and can be used in various applications to impart photochromic and / or dichroic properties A reversible photochromic compound. A) 3-phenyl-3- (4- (4-piperidinopiperidino) phenyl) -13,13-dimethyl-indeno [2 ′, 3 ′: 3,4] naphtho [1, 2-b] pyran; (b) 3-phenyl-3- (4- (4-phenylpiperazine) phenyl) -13,13-dimethyl-indeno [2 ′, 3 ′: 3,4] naphtho [1,2 -B] pyran; (c) 3-phenyl-3- (4-pyrrolidin-1-yl-phenyl) -13,13-dimethyl-6-methoxy-7- (4-phenyl-piperazin-1-yl) indeno [2 ′, 3 ′: 3,4] Photochromic compound selected from 9 types such as naphtho [1,2-b] pyran. [Selection figure] None |