Abstract
Two ternary mixed ligand Co(II) coordination polymers (CPs), {[Co(L1)(tbta)]·H2O}n (1) and [Co(L1)(nip)]n (2) [L1 = 1,5-bis(benzimidazolyl)pentane, H2tbta = tetrabromoterephthalic acid, H2nip = 5-nitroisophthalic acid], have been synthesized under hydrothermal conditions and structurally characterized by single-crystal X-ray diffraction, powder X-ray diffraction (PXRD), IR spectroscopy and elemental analysis. 1 consists of infinite two-dimensional (4,4) sheets, which further extend into a three-dimensional supramolecular framework by hydrogen-bonding interactions. 2 exhibits a unique 3D framework with a 2-nodal (3,5)-connected 3,5T1 topology. Both compounds show high photocatalytic activity for the degradation of methylene blue (MB) dye under UV irradiation. Furthermore, the luminescence properties, thermal behavior and electrochemical behaviors of 1 and 2 have also been investigated in detail.
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