Synthesis of highly functionalized BEDT-TTF analogues incorporating 1,4-dithiin rings from 1,8-diketones
作者:Erdal Ertas、F. Betul Kaynak、Suheyla Ozbey、Ipek Osken、Turan Ozturk
DOI:10.1016/j.tet.2008.08.085
日期:2008.11
with dihydroxyl, dimethyl, MEM and diphenylthiophene groups. Spectroelectrochemistry of ET and its fully unsaturated analogue 4 was compared. While both displayed nearly similar behaviours, ET started to precipitate as the second oxidation potential is reached. CV studies indicated that the fully unsaturated 4 and tetraphenyldithiophene 20 have the highest oxidation potentials, while diphenyldithiindimethylthio
使用1,8-二酮环形成反应导致具有二苯基-1,4-二硫辛环以及二羟基,二甲基,MEM和二苯基噻吩基团的四硫富瓦烯衍生物的合成。比较了ET及其完全不饱和类似物4的光谱电化学。尽管两者表现出几乎相似的行为,但随着达到第二氧化电位,ET开始沉淀。CV研究表明,完全不饱和的4和四苯基二噻吩20具有最高的氧化电位,而二苯基二硫代二甲硫基16显示最低的氧化电位。CV测量表明二硫辛和羟基的结合有助于降低氧化电位。令人惊讶的是,尽管二硫辛环的存在导致较高的氧化电势,但是羟基降低了电势。研究了具有二硫辛和1,4-二硫平环的13的单晶结构,观察到二硫辛和二硫平环与平面TTF核呈顺式形成20.52°和25.65°的角,因为两个环都绕着它们弯曲S⋯S轴为船形。