摘要
以４，４′－（烷亚甲基二酰氧）二苯甲酰氯和Ｎ－（２，５－二羟基苯）亚甲基－４－正辛氧基苯胺为单体，采用低温缩聚方法，合成了一类新的含Ｔ－型二维液晶基元的液晶高分子配体及其钯配合物，聚合物的液晶行为用ＤＳＣ、偏光显微镜和Ｘ射线衍射进行了表征。发现高分子配体和配合物均为向列型热致液晶高分子，液晶态温度范围较宽。Ｐｄ２＋离子引入高分子配体，对液晶性起正效应，随结构改变，除ｎ＝２外，熔点（Ｔｍ）和液晶态清亮点（Ｔｉ）呈规律性变化。
A new kind of the ligand and palladium of liquid crystal polymers with Tshaped two-dimensional mesogens were synthesized by low temperature solution polycondensations using the monomers 4,4-(alkylene-dioyldioxy) dibenzoyl dichloride and N-2,5-dihydroxy benzylidene-4-n-octyloxyaniline. The liquid crystalline behavior of the ligand and complex was characterized by DSC, polarizing microscopy. It was found that the ligand and complex of polymers are thermotropic nematic liquid crystals with wide mesomorphic temperature range. The incorporation of Pd^2+ ions into the polymeric ligand does play a positive effect on the liquid crystalline property. The Tm and Ti of ligand and complex(except the n=2) changed regularly with the flexible spacers.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1998年第2期24-27,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金
关键词
液晶
讥分子配体
合成
钯
T型
铬合物
T-shaped two-dimensional mesogens
ligand and complex of liquid crystal polymers
synthese and characterization
palladium complex
