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科学通报  2014 

金属有机杂化型相变化合物四氯合锌酸二吡咯烷的设计合成和性质

DOI: 10.1360/N972014-00582, PP. 3080-3085

Keywords: 金属有机,结构相变,单晶结构,原子位移,一级相变

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Abstract:

利用有机含氮杂环小分子吡咯烷与氯化锌、盐酸反应,制备得到1例新颖的金属有机相变化合物--四氯合锌酸二吡咯烷.通过差热扫描量热(DSC)测试,在升温(339.5K)和降温(320.5K)过程中出现可逆的热力学相变峰和较大的的热滞(19K),表明该化合物发生了可逆的一级相变.对其变温介电常数进行分析,室温下低介电态到高温下高介电态的转变进一步证实了化合物发生结构相变.通过变温X射线单晶衍射,研究了晶体在150和353K晶体结构,揭示了其相变机理,表明锌离子的相对位移是该化合物相变的主要原因.

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