A Fully Conjugated TTF-π-TCAQ System: Synthesis, Structure, and Electronic Properties
作者:José Santos、Beatriz M. Illescas、Nazario Martín、Javier Adrio、Juan C. Carretero、Rafael Viruela、Enrique Ortí、Fabian Spänig、Dirk M. Guldi
DOI:10.1002/chem.201002674
日期:2011.3.1
sulfonylmethyl‐exTTFs (exTTF=2‐[9‐(1,3‐dithiol‐2‐ylidene)anthracen‐10(9H)‐ylidene]‐1,3‐dithiole)—prepared as new building blocks—were linked. A variety of experimental conditions reveal that the use of sodium hexamethyldisilazane (NaHMDS) as base in THF afforded the E olefins with excellent stereoselectivity. Theoretical calculations at the B3LYP/6‐31G** level point to highly distorted exTTF and TCAQ that
第一个完全共轭的四硫富瓦烯-四氰基-对-喹二甲烷((TTF)-TCNQ)型系统的合成是通过Julia-Kocienski烯烃化反应进行的。特别是四氰基蒽醌二甲烷(TCAQ)甲酰基衍生物和两个新的磺酰基甲基-exTTF(exTTF = 2- [9-(9,(1,3-二硫醇-2-亚烷基))蒽-10(9 H)-亚烷基] -1,3-已被链接为二硫醇(准备作为新的构建基块)。各种实验条件表明,使用六甲基二硅氮烷钠(NaHMDS)作为THF中的碱可提供E具有优异的立体选择性的烯烃。在B3LYP / 6-31G **水平上的理论计算表明,高度扭曲的exTTF和TCAQ在它们之间形成了几乎平面的二苯乙烯单元。尽管计算预测了供体和受体之间可观的电子通讯,但循环伏安法研究并未证实这种作用。只是在光物理测定中,电子通信才以电荷转移(CT)吸收和发射的形式出现。一旦被光激发(即局部激发态或激发的电荷转移态),亚皮秒