二茂铁基长链烷基β-二酮镍(Ⅱ)配合物的合成及其液晶行为研究

Synthesis and Studies on Liquid Crystalline Behavior of Ferrocenyl Long-Chain Alkyl β-Diketonato Nickel(Ⅱ) Complexes

以二茂铁基长链烷基β－二酮为配体与醋酸镍反应，合成了五个新的二茂铁基长链烷基β－二酮镍（Ⅱ）配合物，经元素分析、红外光谱、核磁共振氢谱、质谱和热分析，确定配合物的组成为ＮｉＬ２·２Ｈ２Ｏ（Ｌ＝Ｃ５Ｈ５ＦｅＣ５Ｈ４ＣＯＣＨＣＯＣｎＨ２ｎ＋１，ｎ＝５～９，对应配合物Ⅰ～Ⅴ）．采用热台偏光显微镜和ＤＳＣ方法研究了配合物的液晶行为，发现这五个含混合金属铁／镍的配合物，具有热致液晶性．

The five novel ferrocenyl long-chain alkyl β-diketonato nickel (Ⅱ) complexes with a generalformula NiL2·2H2O (L=C5H5FeC5H4COCHCOCnH2n+1, where n= 5～ 9 for the correspondingcomplexes Ⅰ～Ⅴ) were synthesized in 79%～93% yield by reaction of the β-diketone ligandwith nickel (Ⅱ) acetate hydrate. These complexes were characterized by elementary analysis,IR,1HNMR,MS and TG-DTA. The liquid crystalline behavior of the complexes was studied bypolarizing microscopy with a heating stage and DSC. It was found that the his (β-diketonato)nickel (Ⅱ) complexes have thermotropic liquid crystalline properties. The type of the heteronuclear liquid crystalline metal complexes have not been reported so far.