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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.
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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
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Alagarsamy R, Hoon SR. Metal pollutants in Indian continental coastal marine sediment along a 3700km transect: An electron paramagnetic resonance spectroscopic study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 612:26-38. [PMID: 28850846 DOI: 10.1016/j.scitotenv.2017.08.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 08/07/2017] [Accepted: 08/07/2017] [Indexed: 06/07/2023]
Abstract
We report the analysis and geographical distribution of anthropogenically impacted marine surficial sediments along a 3700km transect around the continental shelf of India. Sediments have been studied using a mixed analytical approach; high sensitivity electron paramagnetic resonance (EPR), chemical analysis and environmental magnetism. Indian coastal marine deposits are heavily influenced by monsoon rains flushing sediment of geological and anthropogenic origin out of the subcontinental river systems. That is, climatic, hydro-, geo- and anthropogenic spheres couple strongly to determine the nature of Indian coastal sediments. Enrichment of Ni, Cu and Cr is observed in shelf sediments along both east and west coasts associated with industrialised activities in major urban areas. In the Gulf of Cambay and the Krishna and Visakhapatnam deltaic regions, levels of Ni and Cr pollutants (≥80 and ≥120ppm respectively) are observed, sufficient to cause at least medium adverse biological effects in the marine ecosystem. In these areas sediment EPR spectra differ in characteristic from those of less impacted ones. Modelling enables deconvolution of EPR spectra. In conjunction with environmental magnetism techniques, EPR has been used to characterise species composition in coastal depositional environments. Paramagnetic species can be identified and their relative concentrations determined. EPR g-values provide information about the chemical and magnetic environment of metals. We observe g-values of up to 5.5 and large g-shifts indicative of the presences of a number of para and ferrimagnetic impurities in the sediments. EPR has enabled the characterisation of species composition in coastal depositional environments, yielding marine sediment environmental 'fingerprints'. The approach demonstrates the potential of EPR spectroscopy in the mapping and evaluation of the concentration and chemical speciation in paramagnetic metals in sediments from marine shelf environments and their potential for source apportionment and environmental impact assessment.
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Affiliation(s)
- R Alagarsamy
- CSIR-National Institute of Oceanography, Donapaula, Goa 403 004, India.
| | - S R Hoon
- School of Science & the Environment, Faculty of Science & Engineering, Manchester Metropolitan University, Manchester M1 5GD, UK.
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Cui Q, Nakabayashi K, Ma X, Ideta K, Miyawaki J, Marafi AMJ, Al-Mutairi A, Park JI, Yoon SH, Mochida I. Examining the molecular entanglement between VO complexes and their matrices in atmospheric residues by ESR. RSC Adv 2017. [DOI: 10.1039/c7ra06436e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The VO complexes in atmospheric residues, their maltene, resin and asphaltene fractions have been investigated using ESR to examine the effects of the surrounding matrixes on the electron structure and mobility of the VO ion at various conditions.
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Affiliation(s)
- Qingyan Cui
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Kasuga
- Japan
| | - Koji Nakabayashi
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Kasuga
- Japan
| | - Xiaoliang Ma
- Petroleum Research Center
- Kuwait Institute for Scientific Research
- Safat
- Kuwait
| | - Keiko Ideta
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Kasuga
- Japan
| | - Jin Miyawaki
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Kasuga
- Japan
| | | | - Adel Al-Mutairi
- Petroleum Research Center
- Kuwait Institute for Scientific Research
- Safat
- Kuwait
| | - Joo-Il Park
- Petroleum Research Center
- Kuwait Institute for Scientific Research
- Safat
- Kuwait
| | - Seong-Ho Yoon
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Kasuga
- Japan
| | - Isao Mochida
- Kyushu Environmental Evaluation Association
- Japan
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Ramachandran V, van Tol J, McKenna AM, Rodgers RP, Marshall AG, Dalal NS. High Field Electron Paramagnetic Resonance Characterization of Electronic and Structural Environments for Paramagnetic Metal Ions and Organic Free Radicals in Deepwater Horizon Oil Spill Tar Balls. Anal Chem 2015; 87:2306-13. [DOI: 10.1021/ac504080g] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Vasanth Ramachandran
- Department
of Chemistry and Biochemistry, Florida State University, 95 Chieftain
Way, Tallahassee, Florida 32306, United States
| | - Johan van Tol
- National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United States
| | - Amy M. McKenna
- National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United States
| | - Ryan P. Rodgers
- Department
of Chemistry and Biochemistry, Florida State University, 95 Chieftain
Way, Tallahassee, Florida 32306, United States
- National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United States
| | - Alan G. Marshall
- Department
of Chemistry and Biochemistry, Florida State University, 95 Chieftain
Way, Tallahassee, Florida 32306, United States
- National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United States
| | - Naresh S. Dalal
- Department
of Chemistry and Biochemistry, Florida State University, 95 Chieftain
Way, Tallahassee, Florida 32306, United States
- National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United States
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Gourier D, Delpoux O, Bonduelle A, Binet L, Ciofini I, Vezin H. EPR, ENDOR, and HYSCORE Study of the Structure and the Stability of Vanadyl−Porphyrin Complexes Encapsulated in Silica: Potential Paramagnetic Biomarkers for the Origin of Life. J Phys Chem B 2010; 114:3714-25. [DOI: 10.1021/jp911728e] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Didier Gourier
- Laboratoire de Chimie de la Matière Condensée de Paris, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech) and Université Pierre et Marie Curie, UMR-CNRS 7574, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech), UMR-CNRS 7575, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, and Laboratoire de Spectrochimie Infrarouge et
| | - Olivier Delpoux
- Laboratoire de Chimie de la Matière Condensée de Paris, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech) and Université Pierre et Marie Curie, UMR-CNRS 7574, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech), UMR-CNRS 7575, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, and Laboratoire de Spectrochimie Infrarouge et
| | - Audrey Bonduelle
- Laboratoire de Chimie de la Matière Condensée de Paris, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech) and Université Pierre et Marie Curie, UMR-CNRS 7574, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech), UMR-CNRS 7575, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, and Laboratoire de Spectrochimie Infrarouge et
| | - Laurent Binet
- Laboratoire de Chimie de la Matière Condensée de Paris, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech) and Université Pierre et Marie Curie, UMR-CNRS 7574, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech), UMR-CNRS 7575, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, and Laboratoire de Spectrochimie Infrarouge et
| | - Ilaria Ciofini
- Laboratoire de Chimie de la Matière Condensée de Paris, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech) and Université Pierre et Marie Curie, UMR-CNRS 7574, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech), UMR-CNRS 7575, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, and Laboratoire de Spectrochimie Infrarouge et
| | - Hervé Vezin
- Laboratoire de Chimie de la Matière Condensée de Paris, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech) and Université Pierre et Marie Curie, UMR-CNRS 7574, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech), UMR-CNRS 7575, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, and Laboratoire de Spectrochimie Infrarouge et
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Zaragoza I, Santamaria R, Salcedo R. The interaction of vanadyl porphyrin with the HY zeolite surface. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcata.2009.03.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Onay H, Yerli Y, Öztürk R. Synthesis and EPR studies of vanadyl tetrakis(selenodiazole)porphyrazine. TRANSIT METAL CHEM 2008. [DOI: 10.1007/s11243-008-9172-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Sharma S, Kumar A, Chand P, Sharma BK, Sarkar S. Electron paramagnetic resonance study of 3,4,5-trimethoxytetraphenyl porphyrinoxovanadium (IV) complex. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2006; 63:556-64. [PMID: 16024276 DOI: 10.1016/j.saa.2005.06.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2005] [Revised: 05/26/2005] [Accepted: 06/02/2005] [Indexed: 05/03/2023]
Abstract
3,4,5-Trimetoxytetraphenylporphyrinoxovanadium (IV) complex (3,4,5-TMVOTPP) was synthesized by a new one pot synthetic method. The complex was studied in the form of single crystal, powder (polycrystalline state), solution and frozen solution (glassy state) by electron paramagnetic resonance (EPR) between room temperature (RT) and liquid nitrogen temperature (LNT). Interestingly a well-resolved octet in the EPR spectrum at RT is observed in the pure paramagnetic state of the crystal. This observation is attributed to a greatly reduced dipolar interaction between paramagnetic vanadyl ions due to the large size of the molecule and the resultant stacking in the crystalline state. The line width of the EPR signals in single crystal at RT is approximately 3.3 mT which is more than the usual line width in diluted paramagnets ( approximately 1.5 mT) and is attributed to some kind of broadening effect akin to slow motion broadening. The line width in solvents is more than the crystal value but decreases appreciably at low temperatures. The decrease in line width at low temperature is attributed to the increase in spin-lattice-relaxation time and quenching of RT broadening motion. Only one octet is observed in the crystal EPR spectra which suggests only one formula unit per unit cell or a parallel/antiparallel ordering of V=O vectors in case the formula units per unit cell are more than one. This result needs verification by a detailed X-ray investigation. The crystalline field symmetry around the V(4+) metal ion is revealed to be axial by the observed angular dependence of the EPR spectrum and the powder EPR spectrum. No super hyperfine splitting of the hyperfine lines of the vanadyl ion is observed in solid state or diluted glass up to liquid nitrogen temperature. This suggests an expected weak in-plane pi-bonding with ligands. The spin Hamiltonian parameters for vanadyl ion in crystal, powder, diluted solutions and frozen glasses are evaluated and discussed.
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Affiliation(s)
- Swati Sharma
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
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