Synthesis and Properties of Conjugated Oligoyne-Centered π-Extended Tetrathiafulvalene Analogues and Related Macromolecular Systems
作者:Guang Chen、Ilias Mahmud、Louise N. Dawe、Lee M. Daniels、Yuming Zhao
DOI:10.1021/jo2000447
日期:2011.4.15
groups of the oligyne-exTTFs could undergo oxidative coupling to form tetrathiafulvalene vinylogue (TTFV)-linked polymer wires. Through a different synthetic route involving oxidative dimerization and Pd/Cu-catalyzed alkynyl homocoupling, the acetylenic phenyldithiafulvene precursors led to shape-persistent macrocycles where the formation of trimeric macrocycles was particularly favored due to the small
已发现炔基取代的苯基二硫噻烯富烯可用作构建π共轭分子棒,形状持久性大环(SPM)和导电聚合物的通用构建基块。通过Cu(I)催化的炔基均偶联,可以轻松制备一系列带有共轭低聚物(从二炔到己炔)作为中心π-桥的线性π-扩展的四硫富瓦烯类似物(exTTFs)。X射线晶体学和差示扫描量热法(DSC)表征了以二炔和四炔为中心的exTTF的固态性质和反应性,而紫外可见吸收光谱和密度泛函则阐明了低聚exTTF的电子性质。理论(DFT)计算。循环伏安分析表明,低聚物-exTTFs的末端苯基二硫富富烯基可进行氧化偶联,形成四硫富瓦烯乙烯基类似物(TTFV)连接的聚合物线。通过涉及氧化二聚作用和Pd / Cu催化的炔基均偶联的另一种合成途径,炔基苯基二硫富富烯前驱物形成了形状持久的大环,其中三聚体大环的形成因其产生的小环应变而特别受青睐。最后,对这些低聚炔和TTF杂化材料的光谱电化学研究揭示了适用于分子电子和光