...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemical Reviews >Dendritic Catalysts and Dendrimers in Catalysis
【24h】

Dendritic Catalysts and Dendrimers in Catalysis

机译：树枝状催化剂和树枝状大分子的催化作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The field of dendrimers~1-5 was developed in the late 1970s~(7-11) and has exploded during the past decade.~(12-38) This situation is due, beyond the aesthetics appeal, to their great potential of applications in biology and materials science. Among the main potential applications of dendrimers, catalysis stands as one of the most promising ones. Indeed, dendrimers offer a unique opportunity to combine the advantages of homogeneous and heterogeneous catalysis yet keep the well-defined molecular features required for a fully detailed analysis of the catalytic events.~(39,40) It is possible to tune the structure, size, shape, and solubility of dendrimers and metallodendrimers at will and to locate catalytic sites the core or at the periphery.~(30,31) A large number and variety of metallodendrimers are now known, and excellent reviews are available.~(25,29-35) It is clear that designs are without frontier in the field. It has been demonstrated that, as expected, it is possible to remove the catalyst from the reaction medium after a reaction carried out in the preence of a metallodendritic catalyst. This is achieved by precipitation or techniques which are familiar to the biochemists, e.g., ultrafiltration or ultracentrifugation . Membrane reactors are presently developed for this purpose. Organometallic and inorganic catalysts~(41-45 supported on organic polymers such as polystyrene or inorganic polymers such as silica have been investigated for some time,~46-51 but dendrimers now offer a much better control of the number, shape, and structure of the catalytic sites and of their microenvironment.
机译：树枝状聚合物〜1-5的领域是在1970年代后期〜（7-11）发展的，并且在过去的十年间发生了爆炸式的发展。〜（12-38）这种情况是由于其极具应用潜力而超出了美学吸引力。在生物和材料科学领域。在树枝状聚合物的主要潜在应用中，催化是最有前途的方法之一。的确，树枝状聚合物提供了独特的机会，可以结合均相和异相催化的优势，同时保持对催化事件进行全面详细分析所需的明确的分子特征。（39,40）可以调节结构，大小，树状聚合物和金属树状聚合物的形状，溶解度和溶解度，以及位于核心或外围的催化位置。〜（30,31）现在已知大量各种各样的金属树状聚合物，并且有很好的评论。〜（25， 29-35）很明显，设计在该领域没有前沿。已经证明，如所期望的，在存在金属树枝状催化剂的情况下进行反应之后，可以从反应介质中除去催化剂。这可以通过沉淀或生物化学家熟悉的技术来实现，例如超滤或超速离心。目前为此目的开发了膜反应器。有机金属和无机催化剂〜（41-45负载在有机聚合物如聚苯乙烯上或无机聚合物如二氧化硅上）进行了一段时间的研究，〜46-51但树状聚合物现在提供了更好地控制其数量，形状和结构的方法催化部位及其微环境。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号