16957-90-7Relevant articles and documents
Thermally Irreversible Photochromic Systems. Reversible Photocyclization of 1,2-Bis(benzothiophen-3-yl)ethene Derivatives
Uchida, Kingo,Nakayama, Yasuhide,Irie, Masahiro
, p. 1311 - 1315 (1990)
1,2-Bis(benzothiophen-3-yl)ethene derivatives, which possess thermally irreversible and fatique resistant photochromic properties, were synthsized. cis-1,2-Dicyano-1,2-bis(2-methylbenzothiophen-3yl)ethene Ia and 2,3-bis(2-methylbenzothiophen-3-yl)maleic anhydride 2a underwent reversible photocyclization to produce red-colored closed-ring forms with λmax at 507 and 544 nm, respectively.The closed-ring forms were stable for more than 3 weeks at 80 deg C.The coloration/decoloration (ring closure/opening)cycles were able to be repeated more than 1E4 times with keeping the adequate photochromic performance.
Benzothiophene/indole-substituted maleimide derivatives, photochromic material comprising said derivatives and optical recording material using the same material
-
, (2008/06/13)
A novel benzothiophene/indole-substituted maleimide derivative, a photochromic material and an optical recording material using the same. The benzothiophene/indole-substituted maleimide derivative is represented by the following formula (1): STR1 or the following formula (2): STR2 wherein R is a substituted or an unsubstituted monovalent hydrocarbon group, R1 and R2 are a hydrogen atom, an alkyl group, an alkylthio group or an alkoxy group under the condition where at least either one of them is an alkylthio group or an alkoxy group, R3 is an alkyl group or an acyl group, and rings A and B may not be substituted or may be substituted with an alkyl group, an alkoxy group or a halogen atom, respectively.
