π Conjugation Across the Tetrathiafulvalene Core: Synthesis of Extended Tetrathiafulvalene Derivatives and Theoretical Analysis of their Unusual Electrochemical Properties
作者:Najoua Terkia-Derdra、Raquel Andreu、Marc Sallé、Eric Levillain、Jesús Orduna、Javier Garín、Enrique Ortí、Rafael Viruela、Rosendo Pou-Amérigo、Bouchta Sahraoui、Alain Gorgues、Jean-François Favard、Amédée Riou
DOI:10.1002/(sici)1521-3765(20000403)6:7<1199::aid-chem1199>3.3.co;2-7
日期:2000.4.3
A series of extended tetrathiafulvalene (TTF) derivatives bearing one or two 1,4-dithiafulven-6-yl substitutents has been prepared. The new compounds present remarkable electrochemical singularities compared with other TTF derivatives, which are strongly affected by the nature of the substitution on the lateral heterocycle(s). This unusual electrochemical behaviour follows a square-scheme sequence
已经制备了一系列带有一个或两个1,4-二硫富富翁-6基取代基的扩展的四硫富瓦烯(TTF)衍生物。与其他TTF衍生物相比,这些新化合物具有显着的电化学奇异性,这些奇异性受横向杂环取代性质的强烈影响。这种不寻常的电化学行为遵循平方方案序列,并且归因于供体pi分子氧化后的结构变化。电化学数据的数字模拟已用于得出平方方案中涉及的动力学和热力学常数的值。理论计算确定了高度离域的共振形式的重要贡献,该共振形式涉及氧化物种中的四价硫,这可以证明发生不同于TTF的电化学行为。最后,给出了其中两个系统的三级磁化率chi 3,其中给电子和吸电子取代基共存并通过TTF pi系统共轭。