Synthesis and spectral characterization of macrocyclic lanthanide(III) Complexes of an 18-Membered Tetraaza Tetraimine Schiff Bases

Benedict, B. Anna

doi:10.3233/mgc-180675

Cited by 4 publications

(1 citation statement)

References 31 publications

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“…Macrocyclic metal complexes exhibit widespread potential applications in cytotoxicity, antioxidant and antibacterial activities [1][2][3][4], photoluminescent property [5][6][7], catalytic proper-ties, such as: hydrosilylation of diphenyl acetylenes [8], electrocatalytic oxygen reduction [9,10], ring opening reaction [11], electrocatalytic CO2 reduction [12], hydrogen evolution reaction [13], water oxidation catalysis [14], gas adsorption [15], magnetic property [16], and so on. According to the literatures report [17][18][19][20][21][22], precious metal oxide, hydrogen peroxide, precious metal nanomaterials and MOFs are used as a catalyst to produce benzaldehyde by oxidation of benzyl alcohol.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Crystal Structure of Tetra-Nuclear Macrocyclic Zn(II) Complex and Its Application as Catalyst for Oxidation of Benzyl Alcohol

Wang

Wang²,

Zhao

et al. 2021

Bull. Chem. React. Eng. Catal.

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A new six coordinated tetra-nuclear macrocyclic Zn(II) complex, ZnL4(Phen)2 (1) (HL= 3-bromo-2-hydroxybenzaldehyde-pyridine-2-carbohydrazone, Phen = 1,10-phenanthroline) has been synthesized by the self-assembly of 3-bromo-2-hydroxybenzaldehyde-pyridine-2-carbohydrazone, Zn(CH3COO)2•2H2O, NaOH and 1,10-phenanthroline in water/ethanol (v:v = 1:3) solution. Complex 1 was characterized by elemental analysis, infra red (IR), and single-crystal X-ray diffraction (XRD) analysis. The results show that Zn1 and Zn1b ions are six-coordinated with a distorted octahedral geometric configuration by four O atoms of two different L ligands and two N atoms of two different L ligands, Zn1a and Zn1c ions are also six-coordinated with a distorted octahedral geometric configuration by two N atoms of two different L ligands, two N atoms of Phen ligands and two O atoms of two different L ligands. Complex (1) forms 3D network structure by the - interaction. The selective oxidation reactions of benzyl alcohols catalyzed by complex (1) was investigated. The highest benzyl alcohol conversion and benzaldehyde selectivity were obtained at 100 °C for 4 h under 5 bar of O2. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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