Boosting the proton conduction in a magnetic dysprosium-organic framework by introducing conjugate NH_(4)^(+)-NH_(3)pairs

作     者：Yi-Ping Qu Qian Zou Song-Song Bao Li-Min Zheng Yi-Ping Qu;Qian Zou;Song-Song Bao;Li-Min Zheng

作者机构：State Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2024年第35卷第1期

页      面：518-522页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：the National Natural Science Foundation of China(No.21731003) 

主　　题：Metal-organic framework Proton conduction Ammonia adsorption Metal phosphonate Single molecule magnet 

摘      要：Metal-organic frameworks(MOFs)with inherent porosity and suspended acidic groups are promising proton conducting materials in water or aqua-ammonia *** we report a new lanthanide phosphonate,namely,Dy_(2)(amp_(2)H_(2))_(2)(mal)(H_(2)O)_(2)·5H2O(MDAF-6).It possesses a 3D open-framework structure,and shows a high NH_(3)adsorption capacity of 142.4 cm^(3)/g at P/P0=0.98 at 298 K due to acid-base ***,the proton conductivity of MDAF-6-NH3 is enhanced by five orders of magnitude compared to MDAF-6 after 8.5 h exposure in saturated NH_(3)-H_(2)O vapor,indicating the importance of coexistent conjugate acid-base pairs of H_(3)O+-H_(2)O and NH_(4)^(+)-NH_(3)in promoting proton *** studies of MDAF-6 revealed slow magnetization relaxation under zero dc field,characteristic of singlemolecule magnet *** work provides not only a new multifunctional MOF material,but also a new strategy to improve proton conduction in aqua-ammonia medium.