Luo Jie, Lin Jia-Tong, Luo Xiao, Yin Na, Xie Mo, Chen Xu, Li Ying-Qiang, Li Yang-Guang, Ning Guo-Hong, Li Dan
College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Supramolecular Coordination Chemistry, Jinan University, Guangzhou, 510632, China.
Angew Chem Int Ed Engl. 2025 Apr 28:e202502749. doi: 10.1002/anie.202502749.
The development of porous solids for gold recovery is highly desired from both an economical and environmental point of view; however, the design of solid adsorbents with high overall performance is still challenging. Herein, we designed three copper(I) cyclic trinuclear units, Cu(I)-CTUs, based covalent metal-organic frameworks (CMOFs) by networking metal clusters with dynamic covalent linkages. These CMOFs deliver a high gold adsorption capacity of 3687 mg g, ultra-fast adsorption kinetics (i.e., removal efficiency > 99% within 20 s), excellent selectivity and reusability. In addition, they can be readily used for gold extraction from e-waste. Owing to the rich redox properties of Cu-CTUs, these CMOFs show three sorption mechanisms including adsorption, chemical reduction and photocatalytic reduction. Interestingly, the gold-loaded CMOFs can be used as catalysts for hydration of alkynes to ketones with high yields (e.g., up to ∼ 95% for 6 examples).
从经济和环境角度来看，开发用于金回收的多孔固体非常必要；然而，设计具有高整体性能的固体吸附剂仍然具有挑战性。在此，我们通过将金属簇与动态共价键连接，设计了三种基于铜（I）环状三核单元（Cu（I）-CTUs）的共价金属有机框架（CMOFs）。这些CMOFs具有3687 mg g的高金吸附容量、超快的吸附动力学（即在20秒内去除效率>99%）、优异的选择性和可重复使用性。此外，它们可很容易地用于从电子废物中提取金。由于Cu-CTUs具有丰富的氧化还原性质，这些CMOFs表现出三种吸附机制，包括吸附、化学还原和光催化还原。有趣的是，负载金的CMOFs可用作炔烃水合制酮的催化剂，产率很高（例如，6个例子中高达约95%）。
