Functional Polyselenoureas for Selective Gold Recovery Prepared from Catalyst-Free Multicomponent Polymerizations of Elemental Selenium  

作　　者：Xiuying Wu Hua Lin Fengying Dai Rongrong Hu Ben Zhong Tang 

机构地区：[1]State Key Laboratory of Luminescent Materials and Devices,Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates,Center for Aggregation-Induced Emission,South China University of Technology,Guangzhou 510640 [2]Analytical and Testing Center,South China University of Technology,Guangzhou 510640 [3]Department of Chemistry,Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction,The Hong Kong University of Science&Technology,Kowloon,Hong Kong

出　　处：《CCS Chemistry》2020年第3期191-202,共12页中国化学会会刊（英文）

基　　金：This research was made possible as a result of a generous grant from National Science Foundation of China(21822102,21774034,21490573,21490574,and 21788102);the Natural Science Foundation of Guangdong Province(2016A030306045 and 2016A030312002);the Innovation and Technology Commission of Hong Kong(ITC-CNERC14SC01)。

摘　　要：Selenium-containing polymers with fascinating functionalities such as stimuli-responsive property,enzyme mimics,antioxidant activity,promotion of immune-cell activity,anticancer activity,and controlled delivery property,are highly desired,but rarely developed due to their underexplored synthetic methods.Herein,through careful design of monomeric structures and polymerization conditions,we report a series of catalyst-free multicomponent polymerizations(MCPs)of elemental selenium with aliphatic/aromatic diamines and diisocyanides that directly converted selenium to polyselenoureas with long-term stability,good solubility,well-characterized structures,and unique functionalities.The MCPs enjoyed broad monomer scope and fast conversion in 1 min,delivering 18 polyselenoureas with high molecular weights(M_(w)s up to 94,600 g/mol)in high yields(up to 99%).Furthermore,the polyselenoureas could be used for the extraction of Au^(3+)from mixed-metal ion solutions under practical conditions with high selectivity,sensitivity(<1μg/L),efficiency(>99.99%),and capacity(up to 665.60 mg·Au^(3+)/g)within 1 min.Further,the elemental gold was recoverable after the pyrolysis of the polymer complexes.

关 键 词：elemental selenium multicomponent polymerizations functional polyselenoureas gold recovery 

分 类 号：O62[理学—有机化学]