A homopolymolybdate-supported plate-like 2D cobalt network constructed from a new pyrazole-amide-pyridyl ligand: highly electrochemical activity in both capacitive performance and the detection of Cr(Ⅵ)

作     者：Xiu-Li Wang Yong-Zhen Chen Zhi-Han Chang Yu-Chun Lin Jing-Yi Ma 

作者机构：College of Chemistry and Materials EngineeringBohai UniversityJinzhou 121013China Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar CellJinzhou 121013China 

出 版 物：《Tungsten》 (钨科技（英文）)

年 卷 期：2024年第6卷第2期

页      面：422-427页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 07[理学] 08[工学] 070304[理学-物理化学(含∶化学物理)] 070302[理学-分析化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.22271021,21971024) Liao Ning Revitalization Talents Program(XLYC1902011),which are gratefully acknowledged. 

主　　题：Homopolymolybdate Metal–organic network Pyrazole-amide-derived bis(pyridyl)ligand Supercapacitor Electrochemical sensor 

摘      要：By employing a new semi-rigid pyrazole-amide-derived bis(pyridyl)ligand[N,N -bis(4-picolylamine)-1-hydropyrazole(4-dpap)],a new homopolymolybdate-based two-dimensional(2D)plate-like complex[Co(4-dpap)(H_(2)O)(β-Mo_(8)O_(2)6)1/2](1)has been prepared under solvothermal condition and structurally characterized.Theβ-Mo_(8)anions are fi xed between the 2D metal–organic networks[Co(4-dpap)(H_(2)O)]n 2n+via hydrogen-bonding interaction.Complex 1 possesses satisfactory specifi c capacitance of 1512.4 F·g^(−1)(current density:1 A·g^(−1))and good cycling stability(90.8%after 1000 cycles).Moreover,1 represents a promising amperometric sensor for measurement of Cr(Ⅵ)with low detection limit(0.042μmol·L^(−1))and high durability.The insertion ofβ-Mo_(8)anions between the unique 2D metal−organic networks improves the active area of polyoxometalates,which further promotes electrochemical performance.