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Synthesis and crystal structures of zinc(II) coordination polymers of trimethylenedipyridine (tmdp), 4-nitrobenzoic (Hnba) and 4-biphenylcarboxylic acid (Hbiphen) for adsorptive removal of methyl orange from aqueous solution
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Tella, Adedibu C., Oladipo, Adetola C., Adimula, Vincent O., Olayemi, Victoria T., Dembaremba, Tendai O., Ogunlaja, Adeniyi S., Clarkson, Guy J. and Walton, Richard I. (2020) Synthesis and crystal structures of zinc(II) coordination polymers of trimethylenedipyridine (tmdp), 4-nitrobenzoic (Hnba) and 4-biphenylcarboxylic acid (Hbiphen) for adsorptive removal of methyl orange from aqueous solution. Polyhedron, 192 . 114819. doi:10.1016/j.poly.2020.114819 ISSN 0277-5387.
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Official URL: http://dx.doi.org/10.1016/j.poly.2020.114819
Abstract
Two novel Zn(II) coordination polymers (CPs), [Zn(nba)2(tmdp)]n (1) and [Zn(biphen)2(tmdp)]n (2), were synthesised by reacting Zn(NO3)2·6H2O and 4,4′-trimethylenedipyridine (tmdp) with corresponding carboxylates: 4-nitrobenzoic (Hnba) and 4-biphenylcarboxylic acid (Hbiphen). Their structures were characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis (TGA), powder X-ray diffraction (PXRD) and single-crystal X-ray diffraction. Compounds 1 and 2 are one-dimensional CPs with the zinc(II) carboxylate units bridged through the N-donor spacer ligand. The zinc (II) atom adopts a tetrahedral arrangement in 1 and 2 coordinated by two nitrogen atoms from two tmdp ligand molecules and two deprotonated oxygen atoms from two carboxylate ligand molecules. The adsorption capacities of MO in this study was found to be 546.31 mg/g and 22.67 mg/g for 1 and 2, respectively. DFT studies confirmed that adsorption is primarily due to π-π stacking and electrostatic interactions between MO and 1. It is noteworthy that binding energy (BE) values for 1 (-74.14 KJ/mol) and 2 (-61.11 KJ/mol) correlate reasonably well with the observed adsorption capacities of MO. The study demonstrated that 1 has higher adsorption efficiency in comparison to 2 and could be an effective and easily reusable adsorbent for the removal of MO from wastewater.
Item Type: | Journal Article | |||||||||
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Subjects: | Q Science > QD Chemistry | |||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | |||||||||
Library of Congress Subject Headings (LCSH): | Coordination polymers , X-ray crystallography, Adsorption, Volumetric analysis | |||||||||
Journal or Publication Title: | Polyhedron | |||||||||
Publisher: | Pergamon | |||||||||
ISSN: | 0277-5387 | |||||||||
Official Date: | 1 December 2020 | |||||||||
Dates: |
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Volume: | 192 | |||||||||
Article Number: | 114819 | |||||||||
DOI: | 10.1016/j.poly.2020.114819 | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||
Date of first compliant deposit: | 13 October 2020 | |||||||||
Date of first compliant Open Access: | 4 October 2021 | |||||||||
RIOXX Funder/Project Grant: |
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