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通过水热法合成了一种结构新颖的有机-无机多金属氧酸配合物H_7[AsMo_8V_6O_(42)]·[C_2H_8N_2]·4H_2O(简记为配合物1),用IR及X-射线单晶衍射技术对其结构进行了表征,并测试了配合物(1)在苯甲醛氧化制苯甲酸中的催化活性.实验结果表明,配合物(1)的阴离子[AsMo_8V_6O_(42)]~(7-)是一种新型的以As原子为中心的双帽pseudo-Keggin结构多金属氧酸阴离子.配合物(1)在苯甲醛氧化制苯甲酸中具有较高的催化活性,当反应温度为65℃,H_2O_2用量为3.5 mL·m L~(-1)苯甲醛,催化剂用量为30 mg·mL~(-1)苯甲醛,反应历时4 h,苯甲酸的产率最高,可达73.9%.
A novel organic-inorganic polyoxometallate complex H_7 [AsMo_8V_6O_ (42)] [C_2H_8N_2] · 4H_2O (abbreviated as complex 1) was synthesized by hydrothermal method. The complex was characterized by IR and X-ray single crystals (1) in the oxidation of benzaldehyde to benzoic acid.The experimental results show that the anion [AsMo_8V_6O_ (42)] ~ (7- ) Is a novel double-capped pseudo-Keggin polyoxometalate anion centered at As atom.The complex (1) has a high catalytic activity in the oxidation of benzaldehyde to benzoic acid. When the reaction temperature is 65 ℃ , The amount of H 2 O 2 was 3.5 mL · m L -1 benzaldehyde and the amount of catalyst was 30 mg · mL -1 benzaldehyde. The yield of benzoic acid was up to 73.9% after 4 h reaction.