Enhancing anion conductivity in a highly alkali-stable eta topologic Cu(Ⅰ)framework via strong electrostatic repulsion  

作　　者：Xiao-Lu Wang Shaohui Guo Chao Suo Fu-Qiang Zhang Jun-Hao Wang Wenjing Wang Daqiang Yuan Linfeng Liang Xian-Ming Zhang 

机构地区：[1]College of Chemistry,Taiyuan University of Technology,Taiyuan 030024,China [2]Institute of Crystalline Materials,Shanxi University,Taiyuan 030006,China [3]School of Chemistry and Materials Science,Shanxi Normal University,Taiyuan 030031,China [4]State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China

出　　处：《Science China Chemistry》2025年第3期980-986,共7页中国科学(化学英文版)

基　　金：supported by the Fundamental Research Program of Shanxi Province (202403021212028);the National Natural Science Foundation of China (22001154);the Central Government Funding for Talent Promotion (231545023);the Youth Fund from the Department of Science and Technology of Shanxi Province (201901D211148);the Science and Technology Innovation Planning Project in Universities and Colleges of Shanxi Province (2019L0063)。

摘　　要：Metal-organic frameworks(MOFs)based on anion exchange membranes(AEMs)have garnered considerable interest,particularly for their potential to enhance ion conductivity by pre-introducing anions into MOFs.This approach is recognized as straightforward and effective for improving ion conductivity.However,developing high-performance AEMs is limited by the inherent instability and low resistance of MOFs.This study presents a novel 1,3,5-triazineμ_(3)-bridged neutral Cu(Ⅰ)framework,designated SXU-120(where SXU represents Shanxi University).This framework is synthesized using melamine,a widely available industrial product,as the starting material,achieving a high space-time yield exceeding 1.1 kg m^(-3)day^(-1).The organic ligands and metal ions in SXU-120 are 3-connected,forming a rare eta topology with the point symbol 83.SXU-120 exhibits exceptional stability,even in a 10 M KOH solution,due to its high density of uncoordinated-NH_(2) and carbonyl groups.Furthermore,the framework's unique one-dimensional channels,characterized by their electronegativity,interact electrostatically with OH^(-)ions,thereby accelerating OH^(-)ion transfer along these channels.Consequently,the OH^(-)conductivity of this material reaches an impressive 0.49 S cm^(-1)at 90℃under full humidity for 100 h,representing the highest OH^(-)conductivity reported for MOF-based conductors to date.These properties make SXU-120 a promising candidate for efficient AEM materials in next-generation industrial applications.

关 键 词：metal-organic framework crystal engineering ionic conduction 

分 类 号：O641.4[理学—物理化学] TQ425.236[理学—化学]