一例有机-无机杂化3d-4f异金属砷钨酸盐的制备、晶体结构及表征（英文）  

Synthesis,crystal structure and characterization of an organic-inorganic hybrid 3d-4f heterometallic arsenotungstate

作　　者：金梦添 庞晶晶 刘云[1] 陈利娟[1] JIN Mengtian;PANG Jingjing;YUN Liu;CHEN Lijuan(College of Chemistry and Chemical Engineering,Henan University,Kaifeng 475004,Henan,China)

机构地区：[1]河南大学化学化工学院,河南开封475004

出　　处：《化学研究》2018年第4期362-368,共7页Chemical Research

基　　金：Supported by the Natural Science Foundation of China(21671054);the Students Innovative Pilot Plan of Henan University(16NA005)

摘　　要：在水溶液中合成了一例有机-无机杂化3d-4f异金属砷钨酸盐[H_2N(CH_3)_2]5Na_2H_4[Cu(H_2L) Tm0.5Na1.5Cu_3(H_2O)5(B-α-AsW_9O_(33))2]·17H_2O (1)[[H6L=1,3-双((三羟甲基)甲基氨基)丙烷],通过元素分析、红外光谱、热重分析以及X射线单晶衍射对其进行了表征.结构分析表明1的分子结构包含一个有机-无机杂化上午夹心型多阴离子[Cu(H_2L) Tm0.5Na1.5Cu3(H_2O)5(B-α-AsW_9O_(33))2]11-,该多阴离子是由两个相同的亚单元[B-α-AsW_(79)O_(33)]9-和一个六核异金属簇单元[Cu(H_2L) Tm0.5Na1.5Cu3(H_2O)5]+所构成的.该六核异金属簇单元是由一个开放的五元金属环状簇单元[Tm90.5Na1.5Cu3(H_2O)5]+通过一个桥氧原子连接铜-有机配体基团[Cu(H_2L)]2-而组成.对化合物1在不同pH条件下的紫外-可见吸收光谱进行了测试,结果表明化合物1在pH区间0.48～10.06是稳定存在的.An organic-inorganic hybrid 3d-4f heterometallic arsenotungstate [H 2 N（CH3）2]5Na2H4[Cu（H2L）Tm 0.5Na 1.5 Cu3 （H2O） 5（B-α -AsW9O33 ） 2 ]·17H2O（1） [H6L=1,3-Bis[tris （hydroxymethyl）methylamino]propane] was synthesized in aqueous solution and further characterized by elemental analysis, IR spectrum, thermogravimetric analysis and single-crystal X-ray diffraction. Structural analysis shows that the molecular structure of 1 emcompasses an organic-inorganic hybrid sandwich-type polyoxoanion [Cu（H 2 L）Tm 0.5 Na 1.5 Cu 3 （H 2 O） 5 （B-α-AsW9O33 ） 2 ] 11- , which is constructed of two identical [B- α -AsW 9O33 ] 9- subunits sandwiching and a hexanuclear [Cu（H2L）Tm 0.5 Na 1.5 Cu 3 （H2O） 5 ] 7＋ heterometallic cluster. The hexanuclear [Cu（H 2 L）Tm 0.5 Na 1.5 Cu 3 （H 2 O） 5 ] 7＋ heterometallic cluster consists of an opening pentagonal metallocycle subcluster [Tm 0.5 Na 1.5 Cu 3 （ H 2 O ） 5 ] 9＋ connecting with the copper-organic group [Cu（H 2 L）] 2- through a bridging oxygen atom. The UV-vis absorption spectra have been explored under different pH conditions, indicating that 1 is stable in the pH range of 0.48 -10.06.

关 键 词：砷钨酸盐 异金属化合物 紫外-可见吸收光谱 

分 类 号：O614.3[理学—无机化学]