New metallomesogens derived from unsymmetric 1,3,4-thiodiazoles: synthesis, single crystal structure, mesomorphism, and optical properties
作者:Cheng-Tsung Liao、Yueh-Ju Wang、Chi-Shuen Huang、Hwo-Shuenn Sheu、Gene-Hsiang Lee、Chung K. Lai
DOI:10.1016/j.tet.2007.09.031
日期:2007.12
A series of copper(II) complexes 1 derived from unsymmetric 1,3,4-thiadiazoles 2 exhibiting mesogenic properties are reported. All the precursors 2 and 3 exhibited smectic A or/and smectic C phases, whereas, copper complexes formed nematic, SmA or SmC phases. The mesophases formed by derivatives 2 and 3 were probably attributed to the H-bondings induced both intramolecularly or/and intermolecularly
报道了衍生自具有介晶性质的不对称1,3,4-噻二唑2的一系列铜(II)配合物1。所有前体2和3均表现出近晶A相和/或近晶C相,而铜络合物形成向列相,SmA或SmC相。衍生物2和3形成的中间相可能归因于酰胺(-NH)和酚(-OH)基团在分子内或分子间诱导的H键。介晶的2-(5-(2-(己氧基氧基)萘-6-基)-1,3,4-恶二唑-2-基)苯酚的晶体和分子结构(2 ; n = 6,m= 6)通过X射线结构分析确定。它在单斜空间群P -1中结晶,a = 7.4255(18)Å,b = 8.209(2)Å,c = 17.315(5)Å,Z = 2。观察到N2和H1A原子之间的分子间H键(d = 1.89Å)的夹角为161.5°。所有分子堆积成倾斜层排列,并观察到π-π相互作用(约3.56Å)。可变温度FTIR和1 H NMR光谱也用于探测化合物2(m = 0,n = 6)中可能形成的H键。这些化合