A zinc(II) metal-organic complex based on 2-(2-aminophenyl)-1H- benzimidazole ligand: Exhibiting high adsorption capacity for aromatic hazardous dyes and catecholase mimicking activity

Muslim M., Ali A., Ahmad M., Alarifi A., Afzal M., Sepay N., ...More

JOURNAL OF MOLECULAR LIQUIDS, vol.363, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 363
  • Publication Date: 2022
  • Doi Number: 10.1016/j.molliq.2022.119767
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, INSPEC
  • Keywords: Metal-organic complex, Topological description, Adsorption studies, Catecholase activity, Turnover number, Environmental remediation, HIRSHFELD SURFACE-ANALYSIS, CRYSTAL-STRUCTURES, CATIONIC DYES, FRAMEWORKS, REMOVAL, MODEL, ADSORBENT, DISCRETE, TOPOLOGY, COPPER
  • Ondokuz Mayıs University Affiliated: Yes


A dual functional metal-organic complex (MOC) {[Zn(L1)(Cl)(2)]center dot DMF} (1), ( L1 = 2-(2-aminophenylbenzimi dazole) was synthesized by a solvothermal method and characterized by various analytical techniques. Crystals of 1 were harvested by a solvent evaporation method, and single-crystal X-ray diffraction (SCXRD) analysis revealed that 1 adopted a distorted tetrahedral geometry around the central metal ion. The topological simplification of 1 ascertained the simple hcb net. The bulk-phase purity of as-synthesized 1 was confirmed by the decent match of powder X-ray diffraction (PXRD) patterns with the simulated patterns. The band gap and chemical reactivity potential of 1 were confirmed by HOMO-LUMO analysis. Complex 1 showed the efficient adsorption of cationic methylene blue (MB) and anionic methyl orange (MO) dyes from wastewater with good uptake. At room temperature and at neutral pH, complex 1 exhibited the highest removal efficiencies (90% and 80%) and adsorption capacities (q(e) =116.22 mg/g and 102.62 mg/g) for MB and MO dyes, respectively. The plausible mechanism of cationic and anionic dyes removal is based on insight from structural information and existance of array of non-covalent interactions in complex 1. Additionally, complex 1 was also evaluated for catecholase-like activity in ethanol for the oxidation of 3,5-DTBC to 3,5-DTBQ. Complex 1 showed good catecholase-like activity with potential catechol conversion results, k(cat) = 0.98x10(2) h(-1), K-M = 0.0506 M, and V-max = 0.0485x10(-3) M min( -1).(c) 2022 Elsevier B.V. All rights reserved.