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)

Autor: Wang, Xiu-Li, Chen, Yong-Zhen, Chang, Zhi-Han, Lin, Yu-Chun, Ma, Jing-Yi
Zdroj: Tungsten; June 2024, Vol. 6 Issue: 2 p422-427, 6p
Abstrakt: 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)(H2O)(β-Mo8O26)1/2] (1) has been prepared under solvothermal condition and structurally characterized. The β-Mo8anions are fixed between the 2D metal–organic networks [Co(4-dpap)(H2O)]n2n+via hydrogen-bonding interaction. Complex 1possesses satisfactory specific capacitance of 1512.4 F·g−1(current density: 1 A·g−1) and good cycling stability (90.8% after 1000 cycles). Moreover, 1represents a promising amperometric sensor for measurement of Cr(VI) with low detection limit (0.042 µmol·L−1) and high durability. The insertion of β-Mo8anions between the unique 2D metal − organic networks improves the active area of polyoxometalates, which further promotes electrochemical performance.
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