对氨基苯甲酸共价修饰的杂多钼酸盐的合成、结构及性质  

Synthesis,structure and characterization of a 4-aminobenzoic covalently modified heteropolymolybdate

作　　者：于丽[1] 武贺臣 张鑫 马鹏涛[1] 

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》2017年第6期686-690,共5页Chemical Research

基　　金：河南省教育厅科学技术研究重点项目基金(14A150028)

摘　　要：以(NH_4)_6Mo_7O_(24)·4H_2O为基本原料,与对氨基苯甲酸、亚磷酸、CsCl在常规水溶液中反应,合成了一例新型杂多钼酸盐Cs_(2.5)H_(2.5)[HPMo_6O_(21)(O_2CC_6H_4NH_2)_3]·7H_2O(1),通过X射线单晶衍射、元素分析、红外光谱、紫外光谱和荧光光谱等方法对该化合物进行了结构表征和性质研究.X射线单晶衍射分析表明,化合物1属于三斜晶系,P-1空间群,晶胞参数a=1.177 46(7)nm,b=1.249 69(8)nm,c=1.880 99(12)nm,α=73.715 0(10)°,β=85.432 0(10)°,γ=84.061 0(10)°.化合物1阴离子结构中包含一个{PMo6}结构单元,并且三个对氨基苯甲酸共价修饰在{PMo6}框架上;紫外光谱分析结果表明,化合物1在水溶液中5 h内相对稳定,荧光光谱的结果表明化合物1存在配体发射.A new heteropolymolybdate Cs_(2.5)H_(2.5)[HPMo_6O_(21)(O_2CC_6H_4NH_2)_3]·7H_2O(1) has been synthesized by reaction of(NH_4)_6Mo_7O_(24)·4H_2O with 4-aminobenzoic acid,phosphorous acid and CsCl in aqueous solution,and was characterized and investigated by X-ray single-crystal diffraction,elemental analysis,IR spectrum,UV spectrum and photoluminescence.Structural characterization revealed that 1 crystallizes in the triclinic P-1 space group with the cell constants: a = 1.177 46(7) nm,b = 1.249 69(8) nm,c = 1.880 99(12) nm,α = 73.715 0(10) °,β = 85.432 0(10) °,γ =84.061 0(10) °.The polyanion in 1 consists of a { PMo6} subunit covalently grafted on three 4-aminobenzoic acid ligands.UV spectrum analysis indicates that 1 is stable for 5 h in aqueous solution.

关 键 词：杂多钼酸盐 对氨基苯甲酸 晶体结构 荧光 

分 类 号：O612.6[理学—无机化学]