纤维素负载金属基催化体系在有机反应中的研究进展EI北大核心CSCD

金属基催化剂现已成为催化领域的主流催化剂,但其存在难以分离循环使用、催化剂遗留、成本较高、催化剂与底物不稳定性等问题,采用高分子载体进行负载是解决以上问题的一种有效方法。纤维素是地球最丰富的绿色高分子,作为催化剂载体具有来源广泛、可生物降解、无毒、良好的生物相容性的优异特点,且分子结构上具有大量的羟基易改性、可通过多种方式负载金属催化剂。因此,本文综述了纤维素作为载体,负载零价金属纳米粒子、非零价金属基催化剂的进展,以及对负载后的催化体系在氧化还原反应、Heck反应、Suzuki反应等反应中的催化活性进行概述;并通过对比该体系中载体-金属等之间的作用机理,阐述了不同负载方式之间的协同作用,以及催化活性的差异性。

Research progress of cellulose supported metal based catalytic system in organic reactions

Nowadays, metal-based catalysts have become the mainly catalyst in the field of catalysis, which also have some problems such as difficult to be separated and recycled, easily remain, high cost, as well as instability of catalysts and substrate. One effective way to solve the above problems is loading with polymer carrier.Cellulose is the most abundant green and natural polymer on the earth. As a catalyst carrier, cellulose has the excellent characteristics with wide source, biodegradability, non-toxic and good biocompatibility. Meanwhile, cellulose also has a large number of hydroxyl groups on the molecular structure, which can be easily modified and loaded with metal catalysts in various ways. In this paper, the advance of cellulose supported zero valent metal nanoparticles and non-zero valent metal as catalysts were reviewed, and the catalytic activities of the supported catalysts in redox reaction, Heck reaction, Suzuki reaction and other reactions were summarized; by comparing the mechanism of action between carrier and metal in the system, the synergy between different loading modes and the difference of catalytic activity were expounded.