New Transition Metal Coordination Polymers Derived from 2-(3,5-Dicarboxyphenyl)-6-carboxybenzimidazole as Photocatalysts for Dye and Antibiotic Decomposition
Yu Wu,
Wenxu Zhong,
Xin Wang,
Weiping Wu,
Mohd. Muddassir,
Omoding Daniel,
Madhav Raj Jayswal,
Om Prakash,
Zhong Dai,
Aiqing Ma,
Ying Pan
Affiliations
Yu Wu
School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
Wenxu Zhong
School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
Xin Wang
School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
Weiping Wu
School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
Mohd. Muddassir
Department of Chemistry, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia
Omoding Daniel
Department of Chemistry, Faculty of Science, University of Lucknow, Lucknow 226007, India
Madhav Raj Jayswal
Department of Chemistry, Faculty of Science, University of Lucknow, Lucknow 226007, India
Om Prakash
Department of Chemistry, Faculty of Science, University of Lucknow, Lucknow 226007, India
Zhong Dai
Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs, and School of Pharmacy, Guangdong Medical University, Guangdong Medical University Key Laboratory of Research and Development of New Medical Materials, Dongguan 523808, China
Aiqing Ma
Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs, and School of Pharmacy, Guangdong Medical University, Guangdong Medical University Key Laboratory of Research and Development of New Medical Materials, Dongguan 523808, China
Ying Pan
Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs, and School of Pharmacy, Guangdong Medical University, Guangdong Medical University Key Laboratory of Research and Development of New Medical Materials, Dongguan 523808, China
Coordination polymers (CPs) are an assorted class of coordination complexes that are gaining attention for the safe and sustainable removal of organic dyes from wastewater discharge by either adsorption or photocatalytic degradation. Herein, three different coordination polymers with compositions [Ni(HL)(H2O)2·1.9H2O] (1), [Mn3(HL)(L)(μ3-OH)(H2O)(phen)2·2H2O] (2), and [Cd(HL)4(H2O)]·H2O (3) (H3L = 2-(3,5-dicarboxyphenyl)-6-carboxybenzimidazole; phen = 1,10-phenanthroline) have been synthesized and characterized spectroscopically and by single crystal X-ray diffraction. Single crystal X-ray diffraction results indicated that 1 forms a 2D layer-like framework, while 2 exhibits a 3-connected net with the Schläfli symbol of (44.6), and 3 displays a 3D supramolecular network in which two adjacent 2D layers are held by π···π interactions. All three compounds have been used as photocatalysts to catalyze the photodegradation of antibiotic dinitrozole (DTZ) and rhodamine B (RhB). The photocatalytic results suggested that the Mn-based CP 2 exhibited better photodecomposition of DTZ (91.1%) and RhB (95.0%) than the other two CPs in the time span of 45 min. The observed photocatalytic mechanisms have been addressed using Hirshfeld surface analyses.
