金属离子修饰的铂纳米金属簇催化2,3-戊二酮区域选择性氢化

• 作 者: 张洯 刘汉范 王黎辉
• 机 构: 中国科学院化学研究所分子科学中心!中国科学院中国石油化工集团公司高分子化学联合实验室,北京100080,中国科学院化学研究所分子科学中心!中国科学院中国石油化工集团公司高分子化学联合实验室,北京100
• 出 处: 催化学报
• 发表日期: 2000年05期
• 关键词: 氢化 铂纳米簇 金属离子 修饰作用 区域选择性 戊二酮 纳米 选择性氢化 金属簇 控制反应条件

Regioselective hydrogenation of 2,3 pentanedione was investigated over poly ( N vinyl 2 pyrrolidone) stabilized platinum nanoclusters (PVP Pt) with metal cation as modifier. The results indicated that the addition of metal cations as well as the increase of solvent polarity could enhance the regioselectivity for 3 hydroxy 2 pentanone. The use of Sn 2+ could remarkably activate the hydrogenation reaction while the use of Ce 3+ decreased the reaction activity greatly. The modification effect was explained by the toxic effect of metal cations on the metal catalyst, the polarization effect of metal cations on the carbonyl group and the steric effect of the substrate itself.

Regioselective hydrogenation of 2,3 pentanedione was investigated over poly (N vinyl 2 pyrrolidone) stabilized platinum nanoclusters (PVP Pt) with metal cation as modifier. The results indicated that the addition of metal cations as well as the increase of solvent polarity could enhance the The use of Sn 2+ could remarkably activate the hydrogenation reaction while the use of Ce 3+ decreased the reaction activity greatly. The modification effect was explained by the toxic effect of metal cations on the metal catalyst, the polarization effect of metal cations on the carbonyl group and the steric effect of the substrate itself.