以钼酸钠、联咪唑、盐酸胍及过量的磷酸在pH值3～4的水溶液中,自组装形成1个由联咪唑和胍修饰的Strandberg型钼磷酸盐化合物1{H4(H2biim)5 (C(NH2)3)4}[H2P2Mo5O23]2 ·8H2O(H2biim=2,2'-联咪唑).通过X射线单晶衍射、红外光谱(FT-IR)、热重-差热(TG-DTA)、粉末衍射(XRD)等技术手段对化合物1进行表征,确定其具有稳定的有机-无机杂化的3D结构.将化合物1用作有机化学中酮羰基保护反应的催化剂,以环己酮缩乙二醇合成为例,分别考察了催化剂用量、物料比及反应时间对反应的影响.确定最佳反应条件为:催化剂(以Mo计)与酮的摩尔比1∶300,酮醇摩尔比1∶1.4,反应时间2.5h.在此条件下评价了化合物1对其它4种缩酮合成的催化活性,结果表明,化合物1对环己酮缩乙二醇合成反应的催化作用最佳.
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