Oxidation of NO mediated by water-soluble iron porphyrin |
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| Affiliation: | 1. Department of Chemistry, Faculty of Science, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan;2. Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Tatsuno kuchi, Ishikawa 923-1100, Japan;3. Faculty of Medicine, Osaka University, 1-7 Yamadaoka, Suita, Osaka 565-0871, Japan;1. Department of Chemistry, Pondicherry University, Puducherry, India;2. Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, India;1. Instituto Interamericano de Tecnología y Ciencias de Agua (IITCA), Universidad Autónoma del Estado de México, Km.14.5, carretera Toluca-Atlacomulco, C.P 50200 Toluca, Estado de México, Mexico;2. CONACyT-Instituto Nacional de Investigaciones Nucleares, Departamento de Química. Carretera México-Toluca S/N, La Marquesa, C.P. 52750 Ocoyoacac, Estado de México, Mexico;3. Universidad Autónoma Metropolitana, División de Ciencias Básicas e Ingeniería, Departamento de Recursos de la Tierra, Unidad Lerma, Av. de las Garzas N°.10, Colonia el Panteón, Lerma de Villada, C.P. 52005 Lerma, Estado de México, Mexico;4. Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala, Col. Santo Tomás, Miguel Hidalgo, C. P 11340 Ciudad de México, Mexico |
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| Abstract: | An anodic voltammetric wave of NO catalyzed by meso-tetra(N-methyl-4-pyridyl) iron(III) pentachloride ([FeIII(TMPyP)]5+) was found in a phosphate buffer solution (pH 7.4). The current was 10 times larger than the diffusion-controlled current of NO without the iron porphyrin. The current can be used to detect NO in aerobic physiological environments. Spectroelectrochemical measurements suggested the formation of iron-nitrosyl complex, which is responsible for the catalytic oxidation of NO. The intermediate of the catalytic oxidation was detected by spectroelectrochemistry. |
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