权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Preparation of Functional Polymers Containing Untrafine Metal Particles and Their Applications

含超细金属颗粒功能聚合物的制备及其应用

基本信息

批准号：
60550633
负责人：
TOSHIMA Naoki
金额：
$ 1.34万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

项目摘要

1. The present study concerns synthesis of functional polymers containing ultrafine metal particles and their application to highly selective and effective organic syntheses and effective solar energy conversion. The first step of the synthesis of the functional polymers is preparation of the dispersions of ultrafine metal particles. In this study, various methods for reduction of metal ions was examined and photo-reduction method was disclosed to be effective because this method especially produces small particles of metal and monodispersed colloid.2. Synthesis of functional polymers containing ultrafine metal particles was succeeded by photochemical reduction of metal ions in the presence of the assemblies of unsaturated surfactants followed by polymerization of the surfactants.3.1) The molecular assemblies containing ultrafine platinum particles showed high catalytic activities when they were used as the catalysts for hydrogenation of olefins. Nonionic molecular assemblies having polyether groups as hydrophilic moieties of the surfactants showed the higher activity than ionic ones. It was found that the hydrogenation rate varies with the location of double bond in alkyl chain of the unsaturated fatty acid used as a substrate. This regio-selectivity is explained by the effect of the surfactant assemblies to solubilize substrates. These polymers containing colloidal metals are expected to be developed as highly selective catalysts for hydrogenation.2) Polymerized micelle containing ultrafine colloidal platinum particles was used as a catalyst for photochemical hydrogen generation in the system of EDTA/ <Ru(bpy)_3^(2+)> / <MV^(2+)> . It showed higher catalytic activity and stability than the common platinum catalysts. The catalyst supported by nonionic polymerized micelle was more active than those supported by ionic ones. The nonionic hydrophilic group would bring effective charge separation and electron transfer in the present system.

1.本论文主要研究含金属超微粒子的功能高分子的合成及其在高选择性、高效率有机合成和高效太阳能转化中的应用。合成功能高分子的第一步是制备超细金属颗粒的分散体。在这项研究中，各种方法还原金属离子进行了检查和光还原方法被公开是有效的，因为这种方法特别是产生小颗粒的金属和单分散的胶体.在不饱和表面活性剂组装体的存在下，通过光化学还原金属离子，再通过表面活性剂的聚合反应，成功地合成了含金属超细粒子的功能聚合物。3.1）含铂超细粒子的分子组装体作为烯烃加氢催化剂，表现出很高的催化活性。以聚醚基团为亲水基团的非离子型分子组装体比离子型分子组装体具有更高的活性。结果表明，以不饱和脂肪酸为底物，其烷基链上双键的位置不同，加氢速率也不同。这种区域选择性解释的表面活性剂组件的效果，以溶解基板。2）在EDTA/ <Ru（bpy）_3^（2+）> / <MV^（2+）>体系中，以含铂微粒的聚合胶束为催化剂，研究了光化学制氢反应。该催化剂具有比普通铂催化剂更高的催化活性和稳定性。以非离子聚合物胶束为载体的催化剂比以离子聚合物胶束为载体的催化剂活性高。非离子型亲水基团在体系中会产生有效的电荷分离和电子转移。