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Synthesis, structural and DFT investigation of Zn(nba) 2 (meim) 2 for adsorptive removal of eosin yellow dye from aqueous solution
Author(s) -
Oladipo Adetola C.,
Tella Adedibu C.,
Olayemi Victoria T.,
Adimula Vincent O.,
Dembaremba Tendai O.,
Ogunlaja Adeniyi S.,
Clayton Hadley S.,
Clarkson Guy J.,
Walton Richard I.
Publication year - 2021
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.202000425
Subject(s) - chemistry , adsorption , aqueous solution , carboxylate , hydrogen bond , molecule , ligand (biochemistry) , imidazole , inorganic chemistry , tetrahedral molecular geometry , crystal structure , crystallography , stereochemistry , organic chemistry , biochemistry , receptor
A novel Zn(II) mixed‐ligand complex, Zn(nba) 2 (meim) 2 ( 1 ), synthesized from Zn(NO 3 ) 2 .6H 2 O, nitrobenzoic acid (Hnba) and 1‐methylimidazole (meim) is reported. The complex was characterized by elemental analysis, FT‐IR, powder and single crystal X‐ray crystallography and TGA/DSC. 1 exhibits a tetrahedral geometry for Zn(II), which is coordinated to two carboxylate oxygen atoms from two nba anions and two imidazole nitrogen atoms from two meim molecules. Thermal analysis shows the stability of 1 up to 260 °C. The adsorption of eosin yellow (EY) dye on 1 was investigated. The adsorption capacity of 1 for EY amounted to 65.32 mg/g, fitting best into Langmuir isotherm and pseudo second order kinetic models. From DFT studies, it was determined that adsorption is predominantly due to electrostatic, hydrogen bonding and π‐π interactions.