ULTRAFAST COLOR CHANGES IN ORGANIC THIN-FILMS BASED ON PHOTOINDUCED ELECTRON-TRANSFER REACTIONS

被引：13

作者：

NAGAMURA, T ^{[1
]}

SAKAGUCHI, H ^{[1
]}

ITO, T ^{[1
]}

MUTA, S ^{[1
]}

机构：

[1] HAMAMATSU PHOTON KK,CENT RES LAB,HAMAKITA,SHIZUOKA 434,JAPAN

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1994年 / 247卷

关键词：

D O I：

10.1080/10587259408039189

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Colour changes due to photoinduced electron transfer reaction were studied by picosecond pulsed laser in thin polymer films containing 4,4'-bipyridinium tetrakis[3,5-bis(trifluoromethyl)phenyl] borate salts as part of the main chain at 98 - 300 degrees K. The transient absorption at about 600 nm appeared in less than 20 ps upon excitation of ion-pair charge-transfer absorption, which was controlled by the laser pulse width. The decay curve was analyzed by a fast component with a fraction of about 0.2 - 0.3 and lifetime of a few hundreds ps together with an extremely slow one corresponding to steady and reversible colour changes. The lifetime of the former slightly increased with decreasing temperatures. A reaction mechanism is proposed based on these results.

引用

页码：39 / 48

页数：10