Dithienylethenes with a Novel Photochromic Performance
摘要:
Dithienylethenes with low decoloration quantum yields and thermal reversibility at high temperature above 100degreesC were prepared. Introduction of bulky alkoxy substituents at 2- and 2'-positions of the thiophene rings strongly suppressed the cycloreversion quantum yields. The quantum yields were lower than 10(-3), and the photogenerated color remained stable enough under room light. On the other hand, the bulky alkoxy substituent decreased the thermal stability of the colored closed-ring isomers at high temperature. The color of the dithienylethene with cyclohexyloxy substituents faded out in less than 1 min at 160degreesC.
Synthesis of photochromic diarylethene polymers for a write-by-light/erase-by-heat recording system
作者:Seiya Kobatake、Itsuka Yamashita
DOI:10.1016/j.tet.2008.05.088
日期:2008.8
performance of the monomeric diarylethene chromophore. In addition, the colored state has a high photostability under visible room light. The diarylethene homopolymer had a glass transition temperature (Tg) as high as polystyrene. The copolymer of 1a with N-1-adamantylmaleimide exhibited extremely high Tg above 200 °C with keeping the photofunctional performance. Such photochromic polymer and copolymers
DEVELOPERS AND METHOD OF COLORING LITHOGRAPHIC PRINTING MEMBERS
申请人:Figov Murray
公开号:US20120045720A1
公开(公告)日:2012-02-23
A color contrast image in imaged lithographic printing precursors can be obtained by contacting the imaged precursor with a coloration solution containing a colorless form of a photochromic compound. Residual amounts of this compound attached to the oleophilic surface of the imaged precursor can be changed to its colored form when exposed to UV light. The coloration solution can be an alkaline or acidic developer or an alkaline or acidic solution used separately after development. The coloration solution can also be a gum solution.
US8420297B2
申请人:——
公开号:US8420297B2
公开(公告)日:2013-04-16
Molecular design for a write-by-light/erase-by-heat recording system using photochromic diarylethenes with thermal cycloreversion
作者:Yuta Sato、Daichi Kitagawa、Seiya Kobatake
DOI:10.1016/j.tet.2019.130487
日期:2019.8
designed and synthesized photochromicdiarylethenes for a write-by-light/erase-by-heat recording system. The introduction of polar substituents at both sides of the diarylethene maintained the photocyclization and photocycloreversion reactivities, but significantly affected the thermal cycloreversion reactivity. The introduction of electron-withdrawing substituents accelerated the thermal reaction and the