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合成了17个未见报道的中心桥连基为酯基、C=N基,分别含有3～4个苯环,不同刚性实长度以及不同末端链长度的二茂铁化合物,并通过DSC和偏光显微镜对其介晶性进行了表征.研究表明,末端链长度对相变温度和清亮点温度均有影响,但对相变温度范围影响较小,而刚性实长度对其影响却很大.当刚性实达到一定长度时,末端为H原子也具有介晶性——这是第一个无柔性末端链的金属有机液晶化合物.
Seventeen unreported central bridging groups were synthesized, which were ester groups, C = N groups and ferrocene compounds containing 3 ~ 4 benzene rings, different rigid real lengths and different terminal chain lengths, respectively. Their structures were characterized by DSC and polarized light The results show that the length of the terminal chain has an influence on the phase transition temperature and the clearing point temperature, but has little effect on the phase transition temperature range, but the rigid real length has a great influence on it. When the rigidity reaches a certain length, the terminal H atom also has a mesogenicity - this is the first metal-organic liquid crystal compound having no flexible terminal chain.