Syntheses and crystal structures of Ni(II) complexes with pyridine-based macrocyclic ligands

Zahradníková, Eva; Cı́sařová, Ivana; Drahoš, Bohuslav

doi:10.1016/j.poly.2021.115552

Cited by 2 publications

(1 citation statement)

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“…[ 6–8 ] They are ideal donors for metal ions, and can form stable complexes with a variety of metals due to their eclectic coordination modes. [ 9,10 ] The applications of these metal complexes in the fields of catalysis, [ 11,12 ] magnetism, [ 13,14 ] photoluminescence properties, [ 15 ] and biological activity [ 16 ] have become the object of interest to many researchers. However, the antimicrobial activity and theoretical study of manganese and bismuth complexes rooted in quinazoline‐type ligand containing pyridine rings are little‐reported.…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial activities of two 1‐D, 2‐D, and 3‐D mononuclear Mn (II) and dinuclear Bi (III) complexes: X‐ray structures, spectroscopic, electrostatic potential, Hirshfeld surface analysis, and time‐dependent/density functional theory studies

Chai

Zhang

et al. 2022

Applied Organom Chemis

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Two mononuclear and dinuclear octahedral complexes, [Mn(L1)2Cl2] (1) and [Bi2(L2)2Cl8] (2) (L1 = 2‐(2‐pyridyl)‐4‐methyl‐1,2‐dihydroquinazoline‐N3‐oxide, L2 = 2‐(3‐pyridyl)‐4‐methyl‐1,2‐dihydroquinazoline‐N3‐oxide) were prepared by natural volatilization method. The ligands and both complexes were compared with spectroscopic methods, as well as characterized by elemental analysis. The photoluminescence behaviors of both complexes in different solvents were also investigated. The coordination possibility of ligands toward Mn (II)/Bi (III) was verified using X‐ray crystallography, and it revealed that the ratio of ligand to metal was 2:1 in 1, whereas 1:1 in 2. The adjacent molecules of six‐coordinated complex 1 constituted an infinite 1‐D chain, 2‐D network, and ladder‐like 3‐D supramolecular frameworks. Most strikingly, hexa‐coordinated complex 2 with dinuclear structure formed an infinite 1‐D chain, 2‐D layered and meter‐shaped 3‐D supramolecular skeleton. Density functional theory (DFT) calculation was used to optimize the geometry of complexes, compute the electrostatic potential diagrams, and evaluate the HOMO‐LUMO energy gap. The electronic transition simulated through time‐dependent (TD)‐DFT level of calculation rationalized the experimental data. The antibacterial properties of all compounds were evaluated against Gram‐positive and Gram‐negative bacterial strains. In addition, the Hirshfeld surface was utilized to quantify some hydrogen bonding interactions and their contributions.

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