TY - JOUR
T1 - Oxovanadium(IV) complexes containing tetradentate N2O2-type ligands
T2 - synthesis, crystal structure, antioxidant activity, and spectroscopic characterization
AU - Le, Ngoc Tram Anh
AU - Jeong, Yuri
AU - Jang, Yoon Jung
AU - Min, Kil Sik
N1 - Publisher Copyright:
© The Author(s), under exclusive licence to Springer Nature B.V. 2024.
PY - 2024/6
Y1 - 2024/6
N2 - 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.
AB - 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.
KW - Antioxidant activity
KW - Crystal structure
KW - Electron paramagnetic resonance
KW - Magnetic properties
KW - Tetradentate ligand
KW - Vanadium complex
UR - https://www.scopus.com/pages/publications/85181462585
U2 - 10.1007/s10847-023-01215-z
DO - 10.1007/s10847-023-01215-z
M3 - Article
AN - SCOPUS:85181462585
SN - 1388-3127
VL - 104
SP - 277
EP - 287
JO - Journal of Inclusion Phenomena and Macrocyclic Chemistry
JF - Journal of Inclusion Phenomena and Macrocyclic Chemistry
IS - 5-6
ER -