Co(II)-based 2D framework with sql topology: Adsorption of permanganate ions in water and energy storage performances

Xylene-functionalized N-donor ligand p-BIMB (p = para position, BIMB = bis- (imidazole-1-ylmethyl) benzene) and rigid carboxylate linker trans-H(2)CHDA (CHDA = 1,4-cyclohexane(dicarboxylic)acid) were treated with Co(NO3)(2) under solvothermal conditions to afford a new two-dimensional (2D) coordination polymer [Co(trans-H(2)CHDA)(2)(p-BIMB)(2)center dot 2H(2)O](n) (1). Complex 1 possesses a sql network. With the porosity formed by the 2D framework, the Co(II) complex 1 demonstrates an excellent specific capacitance of 563 F g(-1) at a current density of 1 A g(-1), and also good retention of capacitance (approximate to 64% after 4000 cycles at 5 A g(-1)). Which make complex 1 a good candidate for electrode material in a supercapacitor application. Meanwhile, this Co(II) compound exhibits good adsorption ability for the permanganate anion. (C) 2019 Elsevier B.V. All rights reserved.