|
1
|
Singh AK, Usman M, Sarkar S, Sciortino G, Kumar D, Garribba E, Rath SP. Ferromagnetic Coupling in Oxidovanadium(IV)-Porphyrin Radical Dimers. Inorg Chem 2021; 60:16492-16506. [PMID: 34664950 DOI: 10.1021/acs.inorgchem.1c02331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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 VIVO 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 π-cation 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 VIVO ion on the dxy orbital, orthogonal to the porphyrin-based molecular orbitals a1u and a2u.
Collapse
Affiliation(s)
- Akhil Kumar Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Mohammad Usman
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Sabyasachi Sarkar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Giuseppe Sciortino
- Dipartimento di Chimica e Farmacia, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy.,Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST), 43007 Tarragona, Spain
| | - Devesh Kumar
- Department of Physics, School for Physical and Decision Sciences, Babasaheb Bhimrao Ambedkar University, Lucknow 226025, India
| | - Eugenio Garribba
- Dipartimento di Chimica e Farmacia, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - Sankar Prasad Rath
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| |
Collapse
|
|
2
|
Doukkali A, Saoiabi A, Ferhat M, Mugnier Y, Vallat A, Guilard R. Thermodynamic and kinetic control over the oxidation mechanism of the natural vanadyl porphyrin series (DPEP)VO in methylene chloride: electrogeneration of an unusual dicationic species [(DPEP)VO]22+. NEW J CHEM 2006. [DOI: 10.1039/b512360g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
|
3
|
Singh AT, Lemtur A. Oxidation products of VO(T(m-NO2)PP): EPR and cyclic voltammetric studies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2003; 59:1549-1556. [PMID: 12714078 DOI: 10.1016/s1386-1425(02)00333-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The EPR study of VO(T(m-NO2)PP)+ at 77 K is reported. A triplet state spectrum of VO(T(m-NO2)PP)(+) at 77 K is obtained. The ZFS parameters are obtained from the computer simulation. An inter-electron distance of 3.57+/-0.05 A between the two unpaired electrons is obtained. This is attributed to an a(2u) ground state of the porphyrin. Also, room temperature EPR of the pre-oxidized species of VOTPP with SbCl5 are reported. The effect on the oxidation potentials due to substitution is also reported.
Collapse
Affiliation(s)
- A Tomba Singh
- Department of Chemistry, North-Eastern Hill University, Umshing, Mawkynroh, 793 022, Meghalaya, Shillong, India
| | | |
Collapse
|
|
4
|
Czarnecki K, Proniewicz LM, Fujii H, Ji D, Czernuszewicz RS, Kincaid JR. Insensitivity of Vanadyl−Oxygen Bond Strengths to Radical Type (2A1u vs 2A2u) in Vanadyl Porphyrin Cation Radicals. Inorg Chem 1999. [DOI: 10.1021/ic981369g] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kazimierz Czarnecki
- Chemistry Department; Marquette University, Milwaukee, Wisconsin 53233, Chemical Physics Division, Department of Chemistry, and Regional Laboratory of Physicochemical Analysis and Structural Research, Jagiellonian University, 3 Ingardena Street, 30-060 Krakow, Poland, Institute for Molecular Science, Okazaki National Research Institutes, Okazaki 444, Japan, and Chemistry Department, University of Houston, Houston, Texas 77004
| | - Leonard M. Proniewicz
- Chemistry Department; Marquette University, Milwaukee, Wisconsin 53233, Chemical Physics Division, Department of Chemistry, and Regional Laboratory of Physicochemical Analysis and Structural Research, Jagiellonian University, 3 Ingardena Street, 30-060 Krakow, Poland, Institute for Molecular Science, Okazaki National Research Institutes, Okazaki 444, Japan, and Chemistry Department, University of Houston, Houston, Texas 77004
| | - Hiroshi Fujii
- Chemistry Department; Marquette University, Milwaukee, Wisconsin 53233, Chemical Physics Division, Department of Chemistry, and Regional Laboratory of Physicochemical Analysis and Structural Research, Jagiellonian University, 3 Ingardena Street, 30-060 Krakow, Poland, Institute for Molecular Science, Okazaki National Research Institutes, Okazaki 444, Japan, and Chemistry Department, University of Houston, Houston, Texas 77004
| | - David Ji
- Chemistry Department; Marquette University, Milwaukee, Wisconsin 53233, Chemical Physics Division, Department of Chemistry, and Regional Laboratory of Physicochemical Analysis and Structural Research, Jagiellonian University, 3 Ingardena Street, 30-060 Krakow, Poland, Institute for Molecular Science, Okazaki National Research Institutes, Okazaki 444, Japan, and Chemistry Department, University of Houston, Houston, Texas 77004
| | - Roman S. Czernuszewicz
- Chemistry Department; Marquette University, Milwaukee, Wisconsin 53233, Chemical Physics Division, Department of Chemistry, and Regional Laboratory of Physicochemical Analysis and Structural Research, Jagiellonian University, 3 Ingardena Street, 30-060 Krakow, Poland, Institute for Molecular Science, Okazaki National Research Institutes, Okazaki 444, Japan, and Chemistry Department, University of Houston, Houston, Texas 77004
| | - James R. Kincaid
- Chemistry Department; Marquette University, Milwaukee, Wisconsin 53233, Chemical Physics Division, Department of Chemistry, and Regional Laboratory of Physicochemical Analysis and Structural Research, Jagiellonian University, 3 Ingardena Street, 30-060 Krakow, Poland, Institute for Molecular Science, Okazaki National Research Institutes, Okazaki 444, Japan, and Chemistry Department, University of Houston, Houston, Texas 77004
| |
Collapse
|
|
5
|
Schulz CE, Song H, Mislankar A, Orosz RD, Reed CA, Debrunner PG, Scheidt WR. [Fe(OEP•)(X)]+ π-Cation Radicals: Characterization and Spin−Spin Interactions. Inorg Chem 1997. [DOI: 10.1021/ic961053d] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Charles E. Schulz
- Departments of Physics, Knox College, Galesburg, Illinois 61401, and University of Illinois, Urbana, Illinois 61801, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Chemistry, University of Southern California, Los Angeles, California 90089-0744
| | - Hungsun Song
- Departments of Physics, Knox College, Galesburg, Illinois 61401, and University of Illinois, Urbana, Illinois 61801, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Chemistry, University of Southern California, Los Angeles, California 90089-0744
| | - Anil Mislankar
- Departments of Physics, Knox College, Galesburg, Illinois 61401, and University of Illinois, Urbana, Illinois 61801, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Chemistry, University of Southern California, Los Angeles, California 90089-0744
| | - Robert D. Orosz
- Departments of Physics, Knox College, Galesburg, Illinois 61401, and University of Illinois, Urbana, Illinois 61801, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Chemistry, University of Southern California, Los Angeles, California 90089-0744
| | - Christopher A. Reed
- Departments of Physics, Knox College, Galesburg, Illinois 61401, and University of Illinois, Urbana, Illinois 61801, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Chemistry, University of Southern California, Los Angeles, California 90089-0744
| | - Peter G. Debrunner
- Departments of Physics, Knox College, Galesburg, Illinois 61401, and University of Illinois, Urbana, Illinois 61801, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Chemistry, University of Southern California, Los Angeles, California 90089-0744
| | - W. Robert Scheidt
- Departments of Physics, Knox College, Galesburg, Illinois 61401, and University of Illinois, Urbana, Illinois 61801, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Chemistry, University of Southern California, Los Angeles, California 90089-0744
| |
Collapse
|