A 1D Co(II) coordination polymer based on semi-rigid bis(thiabendazole) and butane-1,2,3,4-tetracarboxylic acid linkers: synthesis, crystal structure, fluorescence sensing and photocatalytic properties

A Co(II)-based ternary coordination polymer with formula {[Co(BTC)(0.5)(L)(H2O)]center dot 3H2O}(n) (NCST-2, NCST = North China University of Science and Technology) was constructed from 1,2-bis(thiabendazol-1-ylmethyl)benzene (L) and butane-1,2,3,4-tetracarboxylic acid (H4BTC) under hydrothermal conditions. NCST-2 features a one-dimensional zigzag chain, which is further extended through O-H center dot center dot center dot O hydrogen bond and pi center dot center dot center dot pi stacking interactions into a three-dimensional supramolecular network. NCST-2 exhibits highly selective and recyclable performance for the fluorescence sensing of Fe3+ in aqueous solution with a linear detection range of 0-400 mu M and a detection limit of 0.12 mu M. NCST-2 displays high photocatalytic activities for degrading methylene blue (MB) under UV irradiation. The possible mechanism of the photodegradation towards MB was investigated in detail. (C) 2019 Elsevier Ltd. All rights reserved.