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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(NO 3) 2 under solvothermal conditions to afford a new two-dimensional (2D) coordination polymer [Co(trans -H 2 CHDA) 2 (p -BIMB) 2 ·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 (≈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. Image 1 • A new coordination polymer [Co(trans -H 2 CHDA) 2 (p -BIMB) 2.•2H 2 O] n has been prepared and characterized. • 2D network with a 4,4-sql topology. • Stable metal organic framework for permanganate recognition and removal in an aqueous solution. • Good candidate for electrode material in a supercapacitor application. [ABSTRACT FROM AUTHOR]