Pd catalysts immobilized onto gel-supported ionic liquid-like phases (g-SILLPs): A remarkable effect of the nature of the support
Pd catalysts immobilized onto gel-supported ionic liquid-like phases (g-SILLPs): A remarkable effect of the nature of the support
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DOI：
10.1016/j.jcat.2009.11.002
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发表时间：
2010-01-01
影响因子：
7.3
通讯作者：
Sans, Victor
中科院分区：
文献类型：
--
作者：
Isabel Burguete, M.;Garcia-Verdugo, Eduardo;Sans, Victor
合成了具有类似离子液体功能位点的新型高分子材料。这些材料是活性钯的支撑库。它们的催化活性已经对Heck反应进行了评估，证明了在活性和可回收性方面的优异性能。虽然可溶性钯似乎参与了催化循环，但对于许多其他支持的钯系统，g-SILLPs表现出有效释放和重新捕获这些可溶性钯的能力。这可以大大减少或消除I浸出到最终溶液的量，特别是在较高温度下，并基于释放和捕获策略，为开发活性支持的Pd催化系统开辟了道路，该系统易于回收和可重复使用，可用于大量催化循环。聚合物（SILLPs）的确切性质对整个过程有显著的影响。g-SILLPs的合理设计是优化释放捕获系统的关键因素。所制备的功能化聚合物可以重复使用大量的催化循环而不损失任何性能。(c) 2009爱思唯尔公司版权所有
New polymeric materials containing functional sites analogous to ionic liquids have been synthesized. Those materials are a supported reservoir for the active Pd species. Their catalytic activity has been evaluated for the Heck reaction proving an excellent performance in terms of both activity and recyclability. Although soluble Pd species seem to participate in the catalytic cycle, as for many other supported Pd-systems, the g-SILLPs present the ability to efficiently release and recapture those soluble species. This allows to dramatically reduce or eliminate the amount of I'd leached to the final solution, in particular at higher temperatures, and opens the way, based on a release and catch strategy, for the development of active-supported Pd catalytic systems, easily recoverable and reusable for a large number of catalytic cycles. The exact nature of the polymer (SILLPs) has a remarkable influence on the overall process. The appropriate design of the g-SILLPs is a key factor for the optimization of the release and catch system. The functionalized polymers prepared can be reused for a significant number of catalytic cycles without any loss in performance. (c) 2009 Elsevier Inc. All rights reserved