Oxovanadium(IV) complexes containing tetradentate N2O2-type ligands: synthesis, crystal structure, antioxidant activity, and spectroscopic characterization

IF 2.3 4区 化学 Q2 Agricultural and Biological Sciences Journal of Inclusion Phenomena and Macrocyclic Chemistry Pub Date : 2024-01-05 DOI:10.1007/s10847-023-01215-z
Ngoc Tram Anh Le, Yuri Jeong, Yoon Jung Jang, Kil Sik Min
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Abstract

Two coordination complexes were synthesized using vanadyl(IV) acetylacetonate and H2denm/H4dpim in MeOH/CHCl3 and characterized. The complexes were [VO(denm)(H2O)]·CH3OH (1) and [VO(H2dpim)(CH3COONa)]·CH3OH (2) (H2denm = 2,2′-[[(1R,2R)-1,2-diphenyl-1,2-ethanediyl]bis[(E)-nitrilomethylidyne]]bis[6-methoxyphenol]; H4dpim = [(2,2-dimethyl-1,3-propanediyl)bis(iminomethylene)bis(6-methoxyphenol)]. The vanadyl(IV) species of 1 and 2 exhibited distorted octahedral geometries with two N and two O atoms of each ligand and aqua/acetate ligand. Complex 1 did not exhibit emissions in the solid and solution states, whereas complex 2 exhibited strong band maxima in the solid state and a dimethyl sulfoxide solution. The magnetic properties and electron paramagnetic resonance spectra of 1 and 2 revealed that they were S = 1/2 spin systems. The antioxidant activity of 2 was higher than those of 1 and ascorbic acid.

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含有四向 N2O2 型配体的氧钒(IV)配合物:合成、晶体结构、抗氧化活性和光谱表征
利用乙酰丙酮酸钒(IV)和 H2denm/H4dpim 在 MeOH/CHCl3 中合成了两种配位配合物,并对其进行了表征。这两种配合物分别是 [VO(denm)(H2O)]-CH3OH (1) 和 [VO(H2dpim)(CH3COONa)]-CH3OH (2)(H2denm = 2,2′-[[(1R,2R)-1,2-二苯基-1,2-乙二基]双[(E)-次氮基亚甲基]]双[6-甲氧基苯酚];H4dpim = [(2,2-二甲基-1,3-丙二基)双(亚氨基亚甲基)双(6-甲氧基苯酚)]。1 和 2 中的钒(IV)物种呈现出扭曲的八面体几何结构,每个配体和水/乙酸配体都有两个 N 原子和两个 O 原子。络合物 1 在固态和溶液状态下都没有发射,而络合物 2 则在固态和二甲基亚砜溶液中显示出很强的带状最大值。1 和 2 的磁性和电子顺磁共振谱显示它们是 S = 1/2 自旋系统。2 的抗氧化活性高于 1 和抗坏血酸。
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来源期刊
CiteScore
3.30
自引率
8.70%
发文量
0
审稿时长
3-8 weeks
期刊介绍: The Journal of Inclusion Phenomena and Macrocyclic Chemistry is the premier interdisciplinary publication reporting on original research into all aspects of host-guest systems. Examples of specific areas of interest are: the preparation and characterization of new hosts and new host-guest systems, especially those involving macrocyclic ligands; crystallographic, spectroscopic, thermodynamic and theoretical studies; applications in chromatography and inclusion polymerization; enzyme modelling; molecular recognition and catalysis by inclusion compounds; intercalates in biological and non-biological systems, cyclodextrin complexes and their applications in the agriculture, flavoring, food and pharmaceutical industries; synthesis, characterization and applications of zeolites. The journal publishes primarily reports of original research and preliminary communications, provided the latter represent a significant advance in the understanding of inclusion science. Critical reviews dealing with recent advances in the field are a periodic feature of the journal.
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