四硫代富瓦烯/四氰基对二次甲基苯醌单分子膜气-液界面性质及LB膜组装体的紫外可见光谱  

Molecular Behavior of Tatrathiafulvalene·tetracyanoquinodimethane Monolayer at Air -Water Interface and Ultraviolet - Visible Spectroscopies of Their Langmuir -Blodgett Films

作　　者：王丽颖[1] 任延志[1] 李薇[1] 曾广赋[1] 席时权[1] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022

出　　处：《分析化学》1998年第4期466-469,共4页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金资助项目

摘　　要：几种电子给体（四硫代富瓦烯，ＴＴＦ）、电子受体（长链四氰基对二次甲基苯醌；Ｃ１８ ＴＣＮＱ）及它们相应的 １：１摩尔比复合物的气－液界面分子行为表明：不带长链的 ＴＴＣ１－ ＴＴＦ、ＢＥＤＴ－ＴＴＦ的成膜性在其与Ｃ１８ＴＣＮＱ形成复合物之后均得到显著改善。Ｃ１６ＴＴＦ、Ｃ１８ ＴＣＮＱ及两者不同结构ＬＢ膜组装体的紫外可见光谱研究发现：Ｃ１８ＴＣＮＱ在其单独的Ｙ－型 膜中摩尔吸光系数是７．５×１０３，而在交替组装体中其摩尔吸光系数是１．３×１０３，给受体之间 的相互作用导致跃迁偶极矩减小，从而引起吸光系数减小４倍多。Investigations on molecular behavior of three kinds of derivatives of electron donor-tetrathiafulvalene (TTF ). electron acceptor-tetracyanoquinodimetha with long hy- drocarbon chain(C18TCNQ) and their complex with a molar ratio of 1: l at air-water inter- face show that, the interfaciaI properties of solid monolayers of TTC1-TTF and BEDT-TTF are improved greatly after forming complex with C18TCNQ. Both C16TTF and C18TCNQ have been investigated for solution phase and LB films structure by using ultraviolet-visible spectroscopies. The molar absorptivity E of C18TCNQ at 365 nm band differs considerably. In separate Y-type LB film of C18TCNQ, the ε is about 7. 5 × 103. However, in alternating depositions' structure with C16TTF, the ε is about l. 3 × 103. This result indicates that, the interaction between donor and acceptor leads the transition dipole moment of 365 nm to re- duce. The reduced transition dipole moment causes the absorptivity reduce.

关 键 词：LB膜 电荷转移复合物 TTF BEDT TCNQ 

分 类 号：O641.3[理学—物理化学]