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Nickel(II) cluster‐based mixed‐cation coordination polymer synthesized from 2‐mercaptobenzoic acid and its application
Author(s) -
Zhu Jingyan,
Yan Shan,
Xiao Hongping,
Jiang Jun,
Li Xinhua
Publication year - 2019
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229619007368
Subject(s) - nickel , cluster (spacecraft) , coordination polymer , chemistry , polymer , polymer chemistry , computer science , organic chemistry , operating system
High‐nuclearity metal clusters have received considerable attention not only because of their diverse architectures and topologies, but also because of their potential applications as functional materials in many fields. To explore new types of clusters and their potential applications, a new nickel(II) cluster‐based mixed‐cation coordination polymer, namely poly[hexakis[μ 4 ‐(2‐carboxylatophenyl)sulfanido]di‐μ 3 ‐chlorido‐tri‐μ 2 ‐hydroxido‐octanickel(II)sodium(I)], [Ni 8 NaCl 2 (OH) 3 (C 7 H 4 O 2 S) 6 ] n , 1 , was synthesized using nickel chloride hexahydrate and mercaptobenzoic acid (H 2 mba) as starting reactants under hydrothermal conditions. The material was characterized by single‐crystal X‐ray diffraction (SCXRD), Fourier transform IR spectroscopy, thermogravimetric analysis, powder X‐ray diffraction and X‐ray photoelectron spectroscopy analysis. SCXRD shows that 1 consists of a hexanuclear nickel(II) [Ni 6 ] cluster, dinuclear Ni II nodes and a mononuclear Na I node, resulting in the formation of a complex covalent three‐dimensional network. In addition, a tightly packed NiO/C&S nanocomposite is fabricated by sintering the coordination precursor at 400 °C. The uniform nanocomposite consists of NiO nanoparticles, incompletely carbonized carbon and incompletely vulcanized sulfur. When used as a supercapacitor electrode, the synthesized composite shows an extra‐long cycling stability (>5000 cycles) during the charge/discharge process.