我们从理论上预测,乙炔桥联的苯并[1,2- c ; 4,5- c ']双[1,2,5]噻二唑(BBT)低聚物会随着链长的增加而显示出双自由基特性的快速增加。为了验证该假设,合成了六种基于BBT的稳定双基类化合物,并通过X射线晶体学分析和各种光谱测量对其进行了全面表征。其中三者由于从开壳单重态基态到三重态激发态的热填充而在高温下表现出显着的顺磁活性。还发现,在末端通过供电子三苯胺基团进行的取代促进了双自由基特性并降低了单重态-三重态的能隙,同时还导致了强烈的近红外吸收。
Bis[1,2,5]thiadiazolo-tetracyanoquinodimethane (1) was prepared and found to form a highly conductive complex with tetrathianaphthacene.
制备了双[1,2,5]噻二唑-四氰基喹二甲烷(1),发现它与四噻吩并四苯形成高导电络合物。
Preparation and Properties of Tetrathio-derivatives of Quinodimethanes Fused to a 1,2,5-Thiadiazole Unit and Related Heterocycles
作者:Yoshiro Yamashita、Tsutomu Miyashi
DOI:10.1246/cl.1988.661
日期:1988.4.5
Wittig-Horner reaction of 2-dimethoxyphosphinyl-1,3-benzodithiole with 1,4-benzoquinones fused to a 1,2,5-thiadiazole unit and relatedheterocycles gave a new type of donors which show reversible two-electron oxidation waves and formed conductive complexes with iodine and DDQ.