Metal N − heterocyclic carbenes (M − NHCs) on the pore walls of a porous metal − organic framework (MOF) can be used as active sites for efficient organic catalysis. Traditional approaches that need strong alkaline reagents or insoluble Ag2O are not however suitable for the incorporation of NHCs on the backbones of MOFs because such reagents could destroy their frameworks or result in low reactivity. Accordingly, development is needed of facile strategies toward functional MOFs with covalently bound M − NHCs for catalysis. Herein, we describe the development of a general and facile approach to prepare MOFs with covalently linked active M − NHC (M = Pd, Ir) single site catalysts by using a soluble Ag salt AgOC(CF3)3 as the source and subsequent transmetalation. The well − defined M − NHC − MOF (M = Pd, Ir) catalysts obtained in this way have shown excellent catalytic activity and stability in Suzuki reactions and transfer hydrogenation reactions. This provides a general and facile strategy to anchor functional M − NHC single − site catalysts onto functionalized MOFs for different reactions.

中文翻译：

---

金属-有机骨架与金属 N-杂环卡宾键合用于高效催化

多孔金属 - 有机骨架 (MOF) 的孔壁上的金属 N - 杂环卡宾 (M - NHC) 可用作高效有机催化的活性位点。然而，需要强碱性试剂或不溶性 Ag2O 的传统方法不适合在 MOF 的骨架上掺入 NHC，因为此类试剂可能会破坏其框架或导致低反应性。因此，需要开发针对具有共价结合的 M - NHC 催化的功能性 MOF 的简便策略。在此，我们描述了一种通用且简便的方法的发展，该方法通过使用可溶性银盐 AgOC(CF3)3 作为来源并随后进行金属转移来制备具有共价连接的活性 M - NHC (M = Pd, Ir) 单中心催化剂的 MOF。定义良好的 M - NHC - MOF (M = Pd, 以这种方式获得的Ir)催化剂在Suzuki反应和转移加氢反应中表现出优异的催化活性和稳定性。这提供了一种通用且简便的策略，可将功能性 M - NHC 单中心催化剂锚定到功能化 MOF 上以进行不同反应。