Synthesis of Functionalized Triazatriangulenes for Application in Photo-Switchable Self-Assembled Monolayers
作者:Jens Kubitschke、Christian Näther、Rainer Herges
DOI:10.1002/ejoc.201000650
日期:2010.9
Various triazatriangulenes are synthesized by nucleophilic attack at the central C atom of triazatriangulenium ions. The molecular functions, especially azobenzenes, are fixed via an ethynyl linker by in situ deprotection of trimethylsilyl-alkynes. The structure of two of these molecules is further investigated by X-ray crystallography. The photo-induced trans/cis-isomerization of the azobenzene substituted
各种三氮杂三氮杂环烯是通过对三氮杂三氮杂环鎓离子的中心 C 原子进行亲核攻击来合成的。分子功能,尤其是偶氮苯,通过三甲基甲硅烷基-炔烃的原位脱保护通过乙炔基接头固定。通过 X 射线晶体学进一步研究了其中两个分子的结构。在溶液中对偶氮苯取代衍生物的光诱导反式/顺式异构化进行了分析,并显示出制备可切换功能化单层的巨大前景,因为三氮杂三烯以其在金表面的自组装而闻名。[1] .
a very unusual case of surface catalysis involving azobenzenes in contact with a Au(111) surface. A rate acceleration of the cis–transisomerization on gold up to a factor of 1300 compared to solution is observed. By using carefully designed molecular frameworks, the electronic coupling to the surface can be systematically tuned. The isomerization kinetics of molecules with very weak coupling to the