A5082872120- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Metal-Catalyzed Oxygenation Mechanisms
- Metal complexes synthesis and properties
- CO2 Reduction Techniques and Catalysts
- Electrochemical sensors and biosensors
- Electrocatalysts for Energy Conversion
- Magnetism in coordination complexes
- Molecular Sensors and Ion Detection
- Analytical Chemistry and Sensors
- Electrochemical Analysis and Applications
- Radioactive element chemistry and processing
- Lanthanide and Transition Metal Complexes
- Porphyrin and Phthalocyanine Chemistry
Indian Institute of Technology Delhi
2022-2025
Indian Institute of Technology Bhubaneswar
2021-2022
The study describes 4e − /4H + reduction of oxygen to water by a non-heme iron complex containing proton exchanging site at the secondary coordination sphere.
A mononuclear CoIII complex (1) of a bisamide-bisalkoxide donor ligand was synthesized and thoroughly characterized. The reaction 1 with 0.5 equiv. m-chloroperbenzoic acid (m-CPBA) in acetonitrile at -40 °C resulted the formation μ-oxodicobalt(IV) (2), which characterized by an array spectroscopic techniques, including X-ray absorption spectroscopy revealed short Co-Ooxo distance 1.67 Å. Reactivity studies 2 towards oxidation/oxygenation hydrocarbon C-H bond triphenylphosphine or thioanisole...
Developing catalysts that achieve a higher turnover frequency (TOF) with lower effective overpotential (ηeff) in electrocatalytic reactions is an emerging focus of research. A promising approach to this end modifying the secondary coordination sphere (SCS) can facilitate hydrogen bonding interactions or electrostatic effects, thereby lowering activation energy barrier rate-determining step (rds). Herein, we designed and synthesized series CoIII complexes (1–8) featuring bis-pyridine-dioxime...
Controlling the selectivity of 4e–/4H+ reduction oxygen over 2e–/2H+ is a key challenge in making efficient catalysts for fuel cell cathodes. A tyrosine residue poised active site cytochrome c oxidase (CcO) has been demonstrated to control hydrogen atom transfer reactions and cleavage O–O bond Fe–O–O–Cu moiety yield water. In couple small-molecule iron complexes supported by porphyrin derivatives, it was shown that presence protonation sites at secondary coordination sphere plays an...
The formation of Cu(III) species are often invoked as the key intermediate in Cu-catalyzed organic transformation reactions. In this study, we synthesized Cu(II) (1) and (3) complexes supported by a bisamidate-bisalkoxide ligand consisting an ortho-phenylenediamine (o-PDA) scaffold characterized them through array spectroscopic techniques, including UV-visible, electron paramagnetic resonance, X-ray crystallography, 1H nuclear magnetic resonance (NMR) absorption spectroscopy. Cu-N/O bond...
Understanding the effect of local electrical field around reaction center in enzymes and molecular catalysis is an important topic research. Herein, we explored electrostatic exerted by alkaline earth metal ions (M2+ = Mg2+, Ca2+, Sr2+, Ba2+) Fe FeIII(Cl) complexes experimental computational investigations. M2+ coordinated dinuclear (12M) were synthesized characterized X-ray crystallography different spectroscopic techniques. EPR magnetic moment measurements exhibited presence high-spin...
Mononuclear nickel(II) and nickel(III) complexes of a bisamidate-bisalkoxide ligand, (NMe4)2[NiII(HMPAB)] (1) (NMe4)[NiIII(HMPAB)] (2), respectively, have been synthesized characterized by various spectroscopic techniques including X-ray crystallography. The reaction redox-inactive metal ions (Mn+ = Ca2+, Mg2+, Zn2+, Y3+, Sc3+) with 2 resulted in 2-Mn+ adducts, which was assessed an array absorption spectroscopy (XAS), electron paramagnetic resonance (EPR), reactivity studies. structure Ca2+...
Herein, we show that the reaction of a mononuclear FeIII(OH) complex (1) with N-tosyliminobenzyliodinane (PhINTs) resulted in formation FeIV(OH) species (3). The obtained 3 was characterized by an array spectroscopic techniques and represented rare example synthetic complex. 1 one-electron oxidizing agent reported to form ligand-oxidized (2). revealed reduction potential −0.22 V vs Fc+/Fc at −15 °C, which 150 mV anodically shifted than 2 (Ered = −0.37 °C), inferring be more 2. reacted...