在水热条件下,以对苯二甲基二膦酸为有机配体,以4,4'-联吡啶为辅助配体,合成了具有二维层状结构的有机膦酸镍化合物.晶体属于单斜晶系,C2/c空间群.该化合物每个金属中心与4个氧原子和2个氮原子配位,金属中心Nil通过4,4'-联吡啶配体相连,形成一维链状结构,再由有机膦酸连接形成了二维层状结构.通过灼烧可以除去化合物中的端基配位水分子,使金属具有不饱和配位点,并且膦酸根上的2个氧原子并未参与配位,这2个未配位的氧原子一个为端基氧,另一个带有氢离子,预示骨架带有酸性,能够吸附碱性气体.%A novel metal organo-diphosphonate compound constructed 2D layers with alkaline gas adsorption property was synthesized through hydrothermal method. The compound is isomorphous and crystallizes in the monoclinic C2/c space group. The metal ions Nil are connected by 4,4'-bpy ligands to form 1D chains and further connected by the organo-diphosphonate ligands to form 2D layer structure. The metal ions are six-coordinated with four oxygen atoms coming from phosphonate and coordinated aqua molecules and two nitrogen atoms coming from 4,4'-bpy. Two oxygen atoms of phosphonate are uncoordinated and the compound could absorb alkaline gas.
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