Cyclic Voltammetric and EPR Studies on the Oxidation Products of Vanadyl Mesoporphyrin

Subramanian, J.; Shedbalkar, V. P.; Lemtur, A.; Chakravorty, R.; Saloi, T. N.

doi:10.1021/jp9511820

Cited by 5 publications

(1 citation statement)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The spin Hamiltonian for such a system has been discussed elsewhere [29]. Diagonalization of the Hamiltonian was done considering the system to be of axial symmetry while the powder spectrum is obtained by averaging over all angular orientations using gaussian quadrature method.…”

Section: Epr Studiesmentioning

confidence: 99%

Oxidation products of VO(T(m-NO2)PP): EPR and cyclic voltammetric studies

Singh

Lemtur

2003

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

View full text Add to dashboard Cite

Section: Epr Studiesmentioning

confidence: 99%

Oxidation products of VO(T(m-NO2)PP): EPR and cyclic voltammetric studies

Singh

Lemtur

2003

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

View full text Add to dashboard Cite

Availability of π–Cation Radical in the Oxidative Products of Oxidovanadium Porphyrin: Significance for DNA Binding and Antibacterial Activity

Muzaddadi,

Murugan,

Saha

et al. 2024

Applied Organom Chemis

View full text Add to dashboard Cite

Oxidovanadium meso‐tetrakis(3,4,5‐trimethoxyphenyl) porphyrin [VO(T(OMe)3PP)] (Complex 1) was prepared. The oxidation product of Complex 1 has been characterized by cyclic voltammetry (CV), UV–visible spectrophotometer, electron paramagnetic resonance (EPR) and nuclear magnetic resonance (NMR) by the addition of SbCl5 to Complex 1. There is a one‐electron oxidation product in Complex 1 that creates π–cation radicals in CV data. This is supported by an IR spectrophotometer. Subsequent EPR spectra verified the initiation of the π–cation monoradical, which subsequently transforms into a triplet state where S = 1. DNA binding and antibacterial analysis with Complex 1 have also been analysed. In the DNA‐binding analysis, the CV data confirm the interaction between Complex 1 and DNA. Furthermore, the fact that Complex 1 is more effective at killing bacteria shows that the metal ion's chelation with the porphyrin ligand makes it more lipophilic.

show abstract

Ferromagnetic Coupling in Oxidovanadium(IV)–Porphyrin Radical Dimers

et al. 2021

View full text Add to dashboard Cite

Three different oxidovanadium(IV) porphyrin dimers with anti, cis, and trans arrangements of the two rings have been synthesized by changing the bridge between the porphyrin macrocycles. This provides a unique opportunity to investigate the role of the bridge and spatial arrangement between the two V IV O centers for their electronic communication and magnetic coupling. They were characterized by the combined application of XRD analysis, UV−vis and electron paramagnetic resonance (EPR) spectroscopy, cyclic voltammetry, magnetic susceptibility, and DFT calculations. One-and two-electron oxidations produce mono-and dication diradical species, respectively, which display an unusual ferromagnetic interaction between the unpaired spins of vanadium(IV) and porphyrin πcation radical, in contrast to other metalloporphyrin dimers. The oxidized species show a dissimilar behavior between cis and trans isomers. The ferromagnetic coupling occurs between the porphyrin π-cation radical and the unpaired electron of the V IV O ion on the d xy orbital, orthogonal to the porphyrin-based molecular orbitals a 1u and a 2u .

show abstract

Cyclic Voltammetric and EPR Studies on the Oxidation Products of Vanadyl Mesoporphyrin

Cited by 5 publications

References 34 publications

Oxidation products of VO(T(m-NO2)PP): EPR and cyclic voltammetric studies

Oxidation products of VO(T(m-NO2)PP): EPR and cyclic voltammetric studies

Availability of π–Cation Radical in the Oxidative Products of Oxidovanadium Porphyrin: Significance for DNA Binding and Antibacterial Activity

Ferromagnetic Coupling in Oxidovanadium(IV)–Porphyrin Radical Dimers

Contact Info

Product

Resources

About