Insights on the interaction of Zn cation with triazoles: Structures, bonding, electronic excitation and applications.

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ID: 89465
2018
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Abstract
At present, we investigate the structures, the stability, the bonding and the spectroscopy of the Zn-triazole complexes (Zn-Tz), which are subunits of triazolate based porous materials and Zn-enzymes. This theoretical work is performed using ab initio methods and density functional theory (DFT) where dispersion correction is included. Through these benchmarks, we establish the ability and reliability of M05-2X+D3 and PBE0+D3 functionals for the correct description of Zn-Tz bond since these DFTs lead to close agreement with post Hartree-Fock methods. Therefore, M05-2X+D3 and PBE0+D3 functionals are recommended for the characterization of larger organometallic complexes formed by Zn and N-rich linkers. For Zn-Tz, we found two stable σ-type complexes: (i) a planar structure where Zn links to unprotonated nitrogen and (ii) an out-of-plane cluster where carbon interacts with Zn. The most stable isomers consist on a coordinated covalent bond between the lone pair of unprotonated nitrogen and the vacant 4s orbital of Zn. The roles of covalent interactions within these complexes are discussed after vibrational, NBO, NPA charges and orbital analyses. The bonding is dominated by charge transfer from Zn to Tz and intramolecular charge transfer, which plays a vital role for the catalytic activity of these complexes. These findings are important to understand, at the microscopic level, the structure and the bonding within triazolate based macromolecular porous materials and Zn-enzymes.
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dahmani2018insightsspectrochimica Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Dahmani, R;Ben Yaghlane, S;Boughdiri, S;Mogren Al-Mogren, M;Prakash, M;Hochlaf, M;
Journal spectrochimica acta part a, molecular and biomolecular spectroscopy
Year 2018
DOI
S1386-1425(17)30991-5
URL
Keywords
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