Synthesis, crystal structure and battery-like studies on a new acylpyrazolone-based mixed-ligand Cu(II) complex

Autor: Elaheh Bechari Poormohammadi, Farshad Boorboor Ajdari, Mahdi Behzad, Maryam Hasanzadeh Esfahani, Alireza Abbasi
Rok vydání: 2021
Předmět:
Zdroj: Research on Chemical Intermediates. 48:575-591
ISSN: 1568-5675
0922-6168
DOI: 10.1007/s11164-021-04605-5
Popis: A new mixed-ligand Cu(II) complex, [Cu(pyr)(bpy)(OH2)]ClO4 (1), was synthesized from 4-acetyl-3-methyl-1-phenyl-2-pyrazoline-5-one (H-pyr) and 2,2-bipyridine (bpy). Single-crystal X-ray diffraction, elemental analysis, and FTIR and UV–Vis spectroscopy were used to confirm its structure. The pyr ligand is the monoanionic deprotonated form of the H-pyr enol tautomer. Additionally, the complex’s battery-like capabilities were investigated. The newly synthesized complex possessed a high specific capacity and provided sufficient energy density for SC devices. Electrochemical evaluations, such as cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy (EIS), indicated that (1) with redox of metal-center holds satisfactory capacity and delivered energy when constructed in three- or two-electrode configuration (KOH 3 M). (1) displayed battery-like qualities (b-value ~ 0.88), as determined by the diffusion contribution at various scan rates. In an alkaline environment, the EIS measurements revealed a low interfacial charge resistance. The maximum specific capacity measured in the three-electrode system was 483 C g−1 (413.6 C g−1 at 2 mV s−1) at a current density of 1 A g−1. These pyrazolone-based compounds would be promising candidates for further energy storage.
Databáze: OpenAIRE
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