Encapsulation of positive ion [Ni(Im)(6)](2+) in a cage structure based on imidazole sulfate supramolecules self-assemble: Preparation, structure, hirshfeld surface analysis and electrochemical study

摘要

An interesting compound of supramolecular architecture has been reported in this paper. The molecular formula is [(NiIm(6))SO4](2)[(HIm)(2)SO4](4)center dot 6H(2)O (Im= imidazole). Analysis of crystal structure data shows that the imidazole sulfate [(HIm)(2)SO4] and water molecules form a cage-like structure, then surround the metal nickel complex in the center of the cage. Six water molecules form a large ring structure with six SO42- by strong hydrogen bonding. The tetrahedron structure of six SO42- and eight imidazole positive ions pass through N-H center dot center dot center dot O hydrogen bonds form a cage-like structure, enclosing [NiIm(6)](2+) positive ions. The compound was characterized by single-crystal X-ray diffraction, Hirshfeld surface analysis, thermogravimetric analysis, infrared spectroscopy and cyclic voltammogram analysis. (C) 2021 Elsevier B.V. All rights reserved.