两个新型的多酸基复合物的合成及催化性质研究

Study on the Synthesis and Catalytic Properties of Two New Polyoxometalate Based Compounds

以硅钼酸作为起始原料,用4,4’-bipy做结构导向剂、还原剂和抗衡阳离子,在水热条件下合成了两个新型的多酸基复合物[NH(C10H8)NH]4[Si Mo12O40〗2·4H2O(1)和[NH(C10H8)NH]3[Si MoVI10MoV2O40]·2H2O(2).并通过IR,元素分析,X-射线单晶衍射仪等手段对复合物进行了结构表征.晶体结构分析表明,复合物1属于单斜晶体,P-1空间群,晶胞参数a=11.225(2),b=12.080(2),c=17.297(2),α=γ=90.000°,β=103.40°,V=2342(8)3;复合物2属于单斜晶体,Cc空间群,晶胞参数a=15.199(3),b=18.193(4),c=21.197(4),α=γ=90.000°,β=103.41°,V=5702(2)3.另外以新型复合物为催化剂,对水污染物模型-罗丹明B染料进行了光催化降解性能研究.结果表明复合物1的催化活性强于复合物2.

In this paper, the hydrothermal synthesis of two new POM-based hybrid compounds, namely [NH（C10H8）NH]4[SiMo12O40]2？ 4H2O（1） and [NH（C10H8）NH]3[SiMoVI10MoV2O40]？ 2H2O（2）, was re-ported, which were synthesized by reactions of Keggin POMs and 4,4’-bipy.IR spectra and X-ray diffraction crystallographic analyses revealed that the compound 1 crystallizes in monoclinic system, P-1 space group, a=11.225（2） ？, b =12.080（2） ？, c =17.297（2） ？, α=γ=90.000＆#176;, β=103.40＆#176;, and V=2342 （8） ？3 .Compound 2 crystallizes in monoclinic system, Cc space group, a =15.199（3） ？, b =18.193（4） ？, c =21.197（4） ？,α=γ=90.000＆#176;,β=103.41＆#176;, and V=5702（2） ？3 .The result of the photocata-lytic activities indicates that the new compounds present better degradation activity and may be a potential photo-catalyst to oxidative decomposition of Rhodamine B dye under ultraviolet-light irradiation.