一个基于Cd-(P_4Mo_6)的超分子化合物的合成、结构及性质

Synthesis,crystal ctructure and properties of a two-dimensional supramolecular compound based on cd-(P_4Mo_6) Units

以1,4-二咪唑基-丁烷(bbi)为有机胺模板剂,利用中温水热合成方法获得了一个三维镉超分子化合物:[Cd(H2O)]2[Cd(H2PO4)2(HPO4)4(PO4)2(Mo O2)12(OH)6]·(bbi)·(H2bbi)2·4H2O,并通过单晶X-射线衍射确定了其结构.该化合物分子式为C30H72Cd3Mo12P8N12O68,三斜晶系,P 1空间群,a=13.274(5),b=13.927(5),c=23.360(5),α=89.943(5)°,β=82.633(5)°,γ=77.037(5)°,Z=1,V=4172(2)3,Mr=3425.24,Dc=2.656 g/cm3,μ=2.760 mm-1,F(000)=3135,S=1.026,R=0.0499,wR=0.1150.晶体结构分析表明,配合物中存在两种配位环境的Cd2+.其中一种Cd2+与来自两个[P4Mo6O28(OH)3]9-[P4Mo6]中的六个Mo O6八面体的桥O配位形成Cd-(P4Mo6)2二聚物结构单元,另一种Cd2+通过来自不同P4Mo6中的PO4中的两个桥O连接成[Cd O(H2O)]2二聚物结构单元.上述两种结构单元交替连接成为一维无机配位聚合物链.相邻的无机链通过bbi配体以及结晶水分子拓展成三维超分子网络.另外,还研究了该化合物的光催化降解亚甲蓝活性和荧光性质.

A two-dimensional Cd（II） supramolecular compound [Cd（H2O） ]2[Cd（H2PO4）2（HPO4）4（PO4）2（Mo O2）12（OH）6]·（bbi） ·（H2bbi）2·4H2O][bbi = 1,1＇-（1,4-butanediyl） bis（imidazole） ] has been hydrothermally synthesized and structurally characterized by single crystal X-ray diffraction analysis.C30H72Cd3Mo12P8N12O68,triclinic,P 1,a = 13.274（5）A,b = 13.927（5）A,c = 23.360（5）A,α = 89.943（5） °,β = 82.633（5） °,γ = 77.037（5） °,Z = 1,V = 4172（2） 3,Mr= 3425.24,Dc= 2.656 g / cm^3,μ =2.760 mm^-1,F（000） = 3135,S = 1.026,R = 0.0499,wR = 0.1150.The crystal structure analysis indicates that the Cd^2＋cations exhibit the two kinds of coordinated environments.One type is that the Cd^2＋cation is coordinated by six bridged oxygen atoms of Mo O6 units from two [P4Mo6O28（OH）3]^9-[P4Mo6]anions,forming a geometry dinuclear subunit.Another type is that two bridged oxygen atoms of PO4 from two P4Mo6 anions connect two Cd^2＋to form a bimetallic [Cd O（H2O） ]2subunit.The above subunits are interlinked alternately to generate one dimensional inorganic chain.The adjacent chains are linked by bbi ligands and the lattice water molecules through H-bonding interactions to form a two dimensional supramolecular network.Moreover,the photoluminescent and photocatalytic activity for the degradation of methylene blue under UV light of the title compound were investigated.CCDC：1458162.