【摘要】 合成了2个系列酰胺型液晶冠醚钾配合物,配合物的结构通过元素分析、IR、UV-Vis和AAS等方法表征。液晶行为通过DSC、POM、XRD等方法表征。实验结果表明,所有配合物均具有热致液晶性,且随分子末端烷氧基碳原子数增加,其熔点和清亮点呈规律性变化。与配体相比,配合物液晶态温度范围变宽。液晶相态类型发生改变,配体只有近晶相,而配合物既有近晶相,又有向列相。更多还原

【Abstract】 Two series of amide type liquid crystalline crown ether potassium complexes containing dibenzo-18-crown-6 were synthesized. Their structures and properties were characterized by elemental analysis, IR, UV-Vis, AAS, DSC, XRD and polarizing optical microscopy with a heating stage (POM). Results show that the complexes change into liquid crystal phase when they are heated over their respective melting points, and the complexes melting points Tm and isotropization temperature Ti change regularly with the increase of the carbon numbers in the end alkoxy groups. The liquid crystalline phase temperature range became broader after complexation, and showed nematic and smectic phase comparing with ligands.更多还原