Molecular Wires Comprising π-Extended Ethynyl- and Butadiynyl-2,5-Diphenyl-1,3,4-Oxadiazole Derivatives: Synthesis, Redox, Structural, and Optoelectronic Properties
作者:Changsheng Wang、Lars-Olof Pålsson、Andrei S. Batsanov、Martin R. Bryce
DOI:10.1021/ja0577600
日期:2006.3.1
5-Diphenyl-1,3,4-oxadiazole (OXD) derivatives with terminal ethynyl- (4a,b) and butadiynyl- (8a,b) substituents have been synthesized in high yields. 2-Methyl-3,5-hexadiyn-2-ol has not been exploited previously in the synthesis of terminal butadiynes. Crystals of 8a and 8b are remarkably stable to long-term storage under ambient conditions. The X-ray crystal structure of 8a reveals that the butadiyne
具有末端乙炔基-(4a,b) 和丁二炔基-(8a,b) 取代基的 2,5-二苯基-1,3,4-恶二唑 (OXD) 衍生物已以高产率合成。2-Methyl-3,5-hexadiyn-2-ol 以前没有被用于合成末端丁二炔。8a 和 8b 的晶体在环境条件下对长期储存非常稳定。8a 的 X 射线晶体结构显示丁二炔部分被芳香部分空间隔离,这解释了高稳定性。两个衍生的pi-共轭分子,Donor-(C[triple bond]C)(n)-OXD (n = 1, 2) 和OXD-(C[triple bond]C)(n)-Donor-(C) [三键]C)(n)-OXD (n = 1) [供体 = 四硫富瓦烯 (TTF)、联噻吩、9-(4,5-二甲基-1,3-二硫醇-2-亚基)芴和三苯胺] , 已使用 Sonogashira 反应合成,并通过 X 射线晶体学、循环伏安法和光学吸收/发射光谱进行表征。OXD