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Kuzmin SM, Chulovskaya SA, Tesakova MV, Semeikin AS, Parfenyuk VI. Solvent and electrode influence on electrochemical forming of poly-Fe(III)-aminophenylporphyrin films. J PORPHYR PHTHALOCYA 2017. [DOI: 10.1142/s1088424617500559] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Fe(III)-complexes of amino-substituted tetraphenylporphyrins obtained from solutions in organic solvents: dichloromethane, ethanol, and dimethyl sulfoxide have been electropolymerized. The solvents’ effects on deposition and surface morphology of the obtained polyporphyrin film have been determined. It is only possible to obtain a polyporphyrin film from DMSO solutions through electrochemical activation of electropolymerization by a superoxide anion radical (O[Formula: see text]. The activation effect of the dissolved oxygen becomes evident in porphyrin interaction with the superoxide anion radical (O[Formula: see text] that is synthesized in DMSO thanks to the quasi-reversible redox process. The size of particles forming the film is lowest when the film is deposited from DMSO and highest when it is deposited from dichloromethane. Therefore, the ratio of polyporphyrin phase grain growth rate to the nucleation rate has the highest value when the film is deposited from dichloromethane. Such films have the most developed surfaces, while those deposited from ethanol are the smoothest. If the film is deposited on an ITO-electrode, the particles forming the surface are a little larger than in the case of deposition on Pt, which is explained by a slower nucleation on the ITO surface. FeClT([Formula: see text]-NH2Ph)P-based films obtained from ethanol and dichloromethane have negative photo-EMF values, which indicates that the [Formula: see text]-type films have semiconductor properties.
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Affiliation(s)
- Sergey M. Kuzmin
- G.A. Krestov Institute of Solution Chemistry of RAS, Akademicheskaya St., 1, Ivanovo, 153045, Russia
- Ivanovo State Power Engineering University, Rabfakovskaya St., 34, Ivanovo, 153003, Russia
| | - Svetlana A. Chulovskaya
- G.A. Krestov Institute of Solution Chemistry of RAS, Akademicheskaya St., 1, Ivanovo, 153045, Russia
| | - Mariya V. Tesakova
- G.A. Krestov Institute of Solution Chemistry of RAS, Akademicheskaya St., 1, Ivanovo, 153045, Russia
| | - Aleksandr S. Semeikin
- Ivanovo State University of Chemistry and Technology, Sheremetevsky Prospekt, 7, Ivanovo, 153000, Russia
| | - Vladimir I. Parfenyuk
- G.A. Krestov Institute of Solution Chemistry of RAS, Akademicheskaya St., 1, Ivanovo, 153045, Russia
- Kostroma State University, Dzerzhinskogo St., 17, Kostroma, 156005, Russia
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Kuzmin SM, Chulovskaya SA, Parfenyuk VI. Substituent position influence on the electrochemical properties and antioxidant activity of tetra(aminophenyl)porphyrins. J PORPHYR PHTHALOCYA 2014. [DOI: 10.1142/s108842461450031x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Free radicals and reactive oxygen species (ROS) are important intermediate products in physiological processes. In the healthy cell, they are generated and regulated by enzymes and low molecular weight antioxidants. Overproduction of ROS leads to a large list of diseases, so the determination of antioxidant activity of perspective natural and synthetic compounds is necessary for drugs development. In this paper cyclic voltammetry (CV) method was applied to the electrochemical and superoxide scavenging properties of 5,10,15,20-tetrakis(4′-aminophenyl)porphyrin ( H 2 T (p- NH 2 Ph ) P ) and 5,10,15,20-tetrakis(3′-aminophenyl)porphyrin ( H 2 T (m- NH 2 Ph ) P ) investigation. It is shown that the studied porphyrins have very similar electrochemical behavior and slight effect on the quantity of superoxide produced during first CV cycle therefore the estimation of superoxide scavenging properties may be performed by the [Formula: see text] oxidation peak current monitoring. The antioxidant properties of porphyrins were estimated in terms of binding constants. The strong effect of NH 2 group position on the superoxide scavenging activity are shown: the H 2 T (p- NH 2 Ph ) P (kb = 12.7 × 102 mol-1) demonstrates the significant superoxide scavenging activities whereas H 2 T (m- NH 2 Ph ) P (kb = 0.83 × 102 mol-1) — negligible. The most probable mechanism of superoxide scavenges explaining the observed differences are the H -atoms transfer due to N – H bond breaking in the aminophenyl substituent.
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Affiliation(s)
- Sergey M. Kuzmin
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Ivanovo 153045, Russia
| | - Svetlana A. Chulovskaya
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Ivanovo 153045, Russia
| | - Vladimir I. Parfenyuk
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Ivanovo 153045, Russia
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Aoki K, Li C, Nishiumi T, Chen J. Self-dispersion of mercury metal into aqueous solutions. J Electroanal Chem (Lausanne) 2012. [DOI: 10.1016/j.jelechem.2012.07.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Boga C, Calvaresi M, Franchi P, Lucarini M, Fazzini S, Spinelli D, Tonelli D. Electron reduction processes of nitrothiophenes. A systematic approach by DFT computations, cyclic voltammetry and E-ESR spectroscopy. Org Biomol Chem 2012; 10:7986-95. [DOI: 10.1039/c2ob26128f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Hernández-Muñoz LS, González FJ, González I, Goulart MO, Abreu FCD, Ribeiro AS, Ribeiro RT, Longo RL, Navarro M, Frontana C. Revisiting the electrochemical formation, stability and structure of radical and biradical anionic structures in dinitrobenzenes. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.04.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Mominul Islam M, Ohsaka T. Two-electron quasi-reversible reduction of dioxygen at HMDE in ionic liquids: Observation of cathodic maximum and inverted peak. J Electroanal Chem (Lausanne) 2008. [DOI: 10.1016/j.jelechem.2008.07.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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