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A Highly Oxidized Cobalt Porphyrin Dimer Spin Coupling

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A Highly Oxidized Cobalt Porphyrin Dimer: Spin Coupling .

A highly oxidized cobalt porphyrin dimer is reported. Each cobalt(II) ion and porphyrin ring underwent 1e oxidation with iodine as the oxidant to give a 4e-oxidized cobalt(III) porphyrin π-cation radical dimer.

Full List of Publications - Indian Institute of Technology .

85. A Highly Oxidized Cobalt Porphyrin Dimer: Spin Coupling and Stabilization of the Four-Electron Oxidation Product S. Dey, D. Sil and S. P. Rath* Angew. Chem. Int. Ed. 2016, 55, 996-1000. Full Article

Dual-Channel-Mediated Spin Coupling for One-Electron .

As the axial ligand X = I and R = CF3, the strongest spin coupling will be induced, and paramagnetic characters are readily tuned up by other combinations of X and R. ... Dual-Channel-Mediated Spin Coupling for One-Electron-Oxidized Cobalt(II)-Saddled Porphyrin.

An ethane-bridged porphyrin dimer as a model of di-heme .

2. Ethane-bridged porphyrin dimer as a model of diheme proteins In order to mimic the heme centers in diheme cytochrome c (DHC2), a covalently linked porphyrin dimer with a highly flexible ethane spacer has been used in which two porphyrin rings can take conformations that are widely seen in the dihemes.

CV S P Rath IIT-K F - PDF Free Downlo

ic time depths of M31 and M32 in Onge and Great Andamanese populations (Fig. 1) more likely reflect the effect of genetic drift in these extremely small populations.

A Highly Oxidized Cobalt Porphyrin Dimer: Spin Coupling .

Each cobalt (II) ion and porphyrin ring underwent 1e oxidation with iodine as the oxidant to give a 4e-oxidized cobalt (III) porphyrin π-cation radical dimer. The bridging ethylene group allows for substantial conjugation of the porphyrin macrocycles, thus leading to a strong antiferromagnetic coupling between the π-cation radicals and to ...

Energy transfer between covalently linked metal porphyrins .

A zinc porphyrin is linked covalently to either a copper or a cobalt porphyrin by a peptide linkage containing either a p-phenylene or an ethylene group.These double porphyrins were prepared by reacting the acid chloride of 2-carboxyl-12,17-diethyl-3,7,8,13,18-pentamethyl-porphyrin with either p-phenylenediamine or ethylenediamine and subsequent reaction with a second acid chloride porphyrin.

Axial Thiophenolate Coordination on Diiron(III .

The binding of a series of substituted thiophenols as axial ligands on a highly flexible ethane-bridged diiron(III)bisporphyrin framework has been investigated as a model of diheme proteins. Spectroscopic characterization reveals a high-spin (S = 5/2) state of iron for all of the pentacoordinate thiophenolato complexes. In the UV–visible spectra of the complexes, the positions of the Soret ...

Chemistry Tree - Debangsu S

(2015) A Highly Oxidized Cobalt Porphyrin Dimer: Spin Coupling and Stabilization of the Four-Electron Oxidation Product. Angewandte Chemie (International Ed. in English) Sil D, Rath SP. (2015) An ethane-bridged porphyrin dimer as a model of di-heme proteins: inorganic and bioinorganic perspectives and consequences of heme-heme interactions.

Triplet State Delocalization in a Conjugated Porphyrin .

Triplet State Delocalization in a Conjugated Porphyrin ...

Publications Authored by Sankar Prasad Rath | PubFac

Publications by authors named "Sankar Prasad Rath" Are you Sankar Prasad Rath?Register this Author

Debangsu Sil | PhD | Pennsylvania State University, PA .

A highly oxidized cobalt porphyrin dimer is reported. Each cobalt(II) ion and porphyrin ring underwent 1e oxidation with iodine as the oxidant to give a 4e-oxidized cobalt(III) porphyrin π-cation ...

Sankar Prasad - IIT Kanp

Rath's group at IIT Kanpur is engaged studying a wide range of bioinorganic and biological systems, all of which fall under the general theme of gaining a better understanding of the heme centers in heme proteins that are vital to the life of almost all living organisms.

Synthesis, Crystal Structure, and Nonlinear Optical .

A vinylene-linked porphyrin dimer, with no substituents at the β-positions, has been synthesized by CuI/CsF promoted Stille coupling. In the crystal structure of this dimer, the C2H2 bridge is twisted by 45° relative to the plane of the porphyrins. The absorption, emission spectra, and electrochemistry reveal substantial porphyrin−porphyrin π-conjugation.

Chemistry Tree - Soumyajit D

Dey S, Sil D, Rath SP. (2015) A Highly Oxidized Cobalt Porphyrin Dimer: Spin Coupling and Stabilization of the Four-Electron Oxidation Product. Angewandte Chemie (International Ed. in English) Dey S, Rath SP.

Light-driven water oxidation for solar fue

Multiple-electron transfer is one of the most difficult hurdles in light-driven water oxidation, especially in manganese-based systems. There are several examples in the literature of attempts to interface the previously reported [Mn III/IV 2 (tpy) 2 (μ-O) 2 (OH 2)] 3+ dimer to chromophores for light-driven water oxidation [66, 73, 172, 173].

Mechanisms of water oxidation using ruthenium, cobalt .

Recently a report using a commercially available cobalt tetraphenylporphyrin sample indicated the formation of ultrathin film of highly active cobalt oxide species, which was only detectable using the synchrotron-based X-ray photoelectron spectroscopy technique. 48 However, the rinse tests carried out using our cobalt porphyrin samples did not ...

Modulation of iron spin in ethane-bridged diiron(III .

Abstract. The multiheme cytochrome c involves extensive interaction among the heme centers to enable them to perform a wide variety of enzymatic activities. In an attempt to exploit such heme–heme interactions in the synthetic diheme, an ethane-bridged diiron(III) porphyrin dimer has been utilized that can switch easily between syn and anti conformations due to highly flexible nature of the ...

A Highly Oxidized Cobalt Porphyrin Dimer: Spin Coupling .

A Highly Oxidized Cobalt Porphyrin Dimer: Spin Coupling ...

Modulation of iron spin in ethane-bridged diiron(III .

Abstract. The multiheme cytochrome c involves extensive interaction among the heme centers to enable them to perform a wide variety of enzymatic activities. In an attempt to exploit such heme–heme interactions in the synthetic diheme, an ethane-bridged diiron(III) porphyrin dimer has been utilized that can switch easily between syn and anti conformations due to highly flexible nature of the ...