Abstract: Multicomponent heteropoly compounds (Cpyr)3+xPVxMoyW12-x-yO40•nH2O with Keggin structure were synthesized and proved by FTIR and X-ray spectroscopies．With 30% aqueous hydrogen peroxide as oxidant，benzyl alcohol was efficiently oxidized to benzaldehyde over reaction-controlled phase-transfer catalysts (Cpyr)3+xPVxMoyW12-x-yO40. Effects of the type of catalyst，the amount of catalyst and H2O2，the kind of solvent，reaction temperature and time were investigated．Under the optimal conditions，i.e.，with 0.1 mol of benzyl alcohol，0.04 mmol of (Cpyr)5PV2Mo5W5O40 catalyst and 0.1mol of 30% H2O2，reaction temperature 100 ℃，10 mL water as the solvent，88.51% conversion of benzyl alcohol and 96.06% selectivity for benzaldehyde were achieved within 8h．

摘要： 合成了一系列具有Keggin结构的P-V-Mo-W四元杂多化合物(Cpyr)3+xPVxMoyW12-x-yO40•nH2O [其中，Cpyr=(C16H32C5H4N)+，x=0、1、2和3]，采用傅里叶变换红外光谱和X射线衍射等方法表征了杂多化合物的结构；以磷钒钼钨杂多化合物为相转移催化剂，用m(H2O2)=30%双氧水氧化苯甲醇制备苯甲醛。考察了催化剂的种类、溶剂的类型和反应条件（催化剂用量、反应温度、反应时间、H2O2用量）对苯甲醇氧化反应的影响。在优化条件下，即苯甲醇0.1 mol、催化剂(Cpyr)5PV2Mo5W5O40 0.04 mmol、m(H2O2)=30%H2O2 0.1 mol、在100 ℃反应8 h、溶剂水10 mL，苯甲醇的转化率达88.51%、苯甲醛的选择性达96.06%。