Loosening metal nodes in metal-organic frameworks to facilitate the regulation of valence  

作　　者：Yu-Xia Li Jia-Xin Shen Ze-Jiu Diao Shi-Chao Qi Xiao-Qin Liu Lin-Bing Sun 

机构地区：[1]State Key Laboratory of Materials-Oriented Chemical Engineering,Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM),College of Chemical Engineering,Nanjing Tech University,Nanjing 210009,China

出　　处：《Fundamental Research》2025年第1期158-164,共7页自然科学基础研究(英文版)

基　　金：funding support from National Science Fund for Distinguished Young Scholars(22125804);the National Natural Science Foundation of China(22008112,22078155,and 21878149);the China Postdoctoral Science Foundation(2019M661813);the Project of Priority Academic Program Development of Jiangsu Higher Education Institutions.

摘　　要：The valence of metal nodes in metal-organic frameworks(MOFs)determines their performance in applications while developing an efficient approach for valence regulation is challenging.Here we present a strategy to make the valence regulation much easier by loosening metal nodes by thermal pretreatment.The typical MOF,HKUST-1,with the tunable valence of Cu nodes,was used as a proof of concept.Thermal pretreatment(producing HK-T)changes the chemical environment and loosens Cu nodes,endowing them with enhanced reducibility.In the subsequent vapor-induced reduction,the yield of Cu^(+)from Cu^(2+)conversion in HK-T(producing HK-T-V)reaches 69%,which is higher than that in pristine HKUST-1(producing HK-V)with a Cu^(+)yield of 19%as well as the reported yields of target-valence metal nodes in various MOFs(6%–30%).The obtained HK-T-V possessing abundant Cu^(+)sites can capture 0.809 mmol/g thiophene in adsorptive desulfurization,2.5 times higher than HK-V and superior to most reported adsorbents.

关 键 词：Metal-organic frameworks Valence regulation Copper ADSORPTION DESULFURIZATION 

分 类 号：O62[理学—有机化学]