New star-shaped triarylamines: synthesis, mesomorphic behavior, and photophysical properties
作者:Yueh-Ju Wang、Hwo-Shuenn Sheu、Chung K. Lai
DOI:10.1016/j.tet.2006.11.058
日期:2007.2
mesomorphic properties were also investigated. Compounds 1–4 and 5,6 were prepared from p,p′,p″-triformyltriphenylamine and p,p′-diformyltriphenylamine with appropriate alkoxyphenylamines. The phase behavior of these mesogenic compounds was characterized and studied by differential scanning calorimetry, polarized optical microscopy, and powder XRD diffraction. Compounds 1–3 exhibited columnar mesophase
共有18个化合物1 - 6从三苯胺作为核心组衍生的制备和表征,以及它们的介晶性能进行了研究。化合物1 - 4和5,6是从制备p,p ',p “和-triformyltriphenylamine p,p具有适当alkoxyphenylamines'-diformyltriphenylamine。这些介晶化合物的相行为已通过差示扫描量热法,偏振光学显微镜和粉末XRD衍射进行了表征和研究。化合物1 - 3展出柱状相,然而,化合物4 - 6是nonmesogenic。化合物中观察到的中间相1 - 3被认为是侧依赖性的。附有一个,两个或三个侧链的化合物1a,2a和3a表现为层状柱状(Col L)相,具有四个或六个侧链的化合物2b和3b形成六方柱状(Col h)相。中间相(层状或柱状中间相)的形成可能是由–CH 2之间形成的氢键引起的。NH组。循环伏安法测定的氧化过程显示出两个氧化还原波,一个在220-255