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 

机构地区：[1]College of Chemistry and Materials Engineering,Bohai University,Jinzhou 121013,China [2]Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar Cell,Jinzhou 121013,China

出　　处：《Tungsten》2024年第2期422-427,共6页钨科技（英文）

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.

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.

关 键 词：Homopolymolybdate Metal–organic network Pyrazole-amide-derived bis(pyridyl)ligand SUPERCAPACITOR Electrochemical sensor 

分 类 号：TM53[电气工程—电器] O641.4[理学—物理化学] O657.1[理学—化学]