铁取代钨硅酸盐位置异构体的合成、表征及电化学性质

• 作 者: 马荣华 刘春涛 瞿伦玉
• 机 构: 齐齐哈尔大学化学化工学院! 齐齐哈尔 161006,齐齐哈尔市环境监测中心站! 齐齐哈尔 161005,东北师范大学化学学院! 长春 130024
• 出 处: 无机化学学报
• 发表日期: 2001年01期
• 关键词: 电化学性质 杂多 位置异构体 环氧化反应 催化活性 金属卟啉 催化剂选择 模型反应 吸收峰 氧化还原性质

： The four heteropoly isomers K3H2[α-,β i-SiW11Fe(H2O)O39]· xH2O(β i=β 1,β 2,β 3)were prepared and Characterized by elementary analysis, IR and UV Spectroscopy. Its electrochemical behavior in aqueous solution has been discussed. The order of Polarographic half-wave potential E1/2 of heteropoly anions is as follows:β 2 >β 1 >β 3 >α . Its reduction process involves an one-electron reduction of Fe? and a pair of two-electron reduction of W? . Epolidation of maleic acid with H2O2 Catalyzed by heteropoly positional isomers was studied.β 3 isomers are the most active.

: The four heteropoly isomers K3H2 [α-, β i-SiW11Fe (H2O) O39] · xH2O (β i = β 1, β 2, β 3) were prepared and Characterized by elementary analysis, IR and UV Spectroscopy. Its electrochemical behavior in aqueous solution has been discussed. The order of Polarographic half-wave potential E1 / 2 of heteropolyanions is as follows: β2> β1> β3> α. Its reduction process involves an one-electron reduction of Fe? and pair of two-electron reduction of W?. Epolidation of maleic acid with H2O2 Catalyzed by heteropoly positional isomers was studied. β3 isomers are the most active.