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Noreen A, Anwar Z, Ahsan Ejaz M, Usmani M, Khan T, Ali Sheraz M, Ahmed S, Mirza T, Khurshid A, Ahmad I. Riboflavin (vitamin B 2) sensitized photooxidation of ascorbic acid (vitamin C): A kinetic study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 309:123813. [PMID: 38198998 DOI: 10.1016/j.saa.2023.123813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 12/01/2023] [Accepted: 12/23/2023] [Indexed: 01/12/2024]
Abstract
Ascorbic acid (AH2) photoxidation sensitized by riboflavin (RF) has been studied between pH 2.0 and 12.0 in ambient air and anaerobic environment using UV and visible irradiation sources. The kinetics of AH2 degradation in aqueous medium along with RF is found to be first-order for its photodegradation. AH2 photolysis rate constants in aerobic and anaerobic conditions with RF (1.0-5.0 × 10-5 M) are 0.14-3.89 × 10-2 and 0.026-0.740 × 10-2 min-1, respectively. The rate constants (k2) of second-order kinetics for AH2 and RF photochemical interaction in aerobic and anaerobic conditions are in the range of 0.24-3.70 to 0.05-0.70 × 10-3 M-1 min-1, respectively, which manifests that increasing the RF concentration also increases the rate of photodegradation (photooxidation) of AH2. The k2 versus pH graph is bell-shaped which indicates that increasing the pH increases photolytic degradation rate of AH2 with RF. Increasing the pH results in the increased ionization of AH2 (ascorbyl anion, AH-) and redox potential which leads to the higher rates of photodegradation of AH2. Two-component spectrophotometric (243 and 266 nm, AH2 and RF, respectively) and high-performance liquid chromatography (HPLC) methods have been used to determine the concentration of AH2 and RF in pure and degraded solutions. The results obtained from these two methods are compared using a student t-test which showed no noteworthy difference between them.
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Affiliation(s)
- Aisha Noreen
- Department of Pharmaceutical Chemistry, Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, Gadap Road, Super Highway, Karachi 75340, Pakistan
| | - Zubair Anwar
- Department of Pharmaceutical Chemistry, Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, Gadap Road, Super Highway, Karachi 75340, Pakistan.
| | - Muhammad Ahsan Ejaz
- Department of Pharmaceutical Chemistry, Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, Gadap Road, Super Highway, Karachi 75340, Pakistan
| | - Muneeba Usmani
- Department of Pharmaceutics, Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, Gadap Road, Super Highway, Karachi 75340, Pakistan
| | - Tooba Khan
- Department of Pharmaceutical Chemistry, Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, Gadap Road, Super Highway, Karachi 75340, Pakistan; Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Sindh, Allama I.I., Kazi Campus, Jamshoro 76080, Sindh, Pakistan
| | - Muhammad Ali Sheraz
- Department of Pharmaceutics, Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, Gadap Road, Super Highway, Karachi 75340, Pakistan
| | - Sofia Ahmed
- Department of Pharmaceutics, Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, Gadap Road, Super Highway, Karachi 75340, Pakistan
| | - Tania Mirza
- Department of Pharmaceutical Chemistry, Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, Gadap Road, Super Highway, Karachi 75340, Pakistan
| | - Adeela Khurshid
- Department of Pharmaceutics, Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, Gadap Road, Super Highway, Karachi 75340, Pakistan
| | - Iqbal Ahmad
- Department of Pharmaceutical Chemistry, Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, Gadap Road, Super Highway, Karachi 75340, Pakistan
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Sacchetto J, Gutierrez E, Reta GF, Gatica E, Miskoski S, Montaña MP, Natera J, Massad WA. A novel eco-friendly polymeric photosensitizer based on chitosan and flavin mononucleotide. Photochem Photobiol Sci 2023; 22:2827-2837. [PMID: 37839053 DOI: 10.1007/s43630-023-00489-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 09/26/2023] [Indexed: 10/17/2023]
Abstract
Flavin mononucleotide (FMN) is a dye belonging to the flavin family. These dyes produce photosensitized degradation of organic compounds via reaction with the excited states of the dye or with reactive oxygen species photogenerated from the triplet of the dye. This article presents a new polymeric dye (FMN-CS) composed of the photosensitizer FMN covalently bonded to chitosan polysaccharide (CS). FMN-CS obtained has a molecular weight of 230 × 103 g mol-1 and a deacetylation degree of 74.8%. The polymeric dye is an environmentally friendly polymer with spectroscopic and physicochemical properties similar to those of FMN and CS, respectively. Moreover, under sunlight, it is capable of generating 1O2 with a quantum yield of 0.31. FMN-CS, like CS, is insoluble in basic media. This allows easy recovery of the polymeric dye once the photosensitized process has been carried out and makes FMN-CS a suitable photosensitizer for the degradation of pollutants in contaminated waters. To evaluate whether FMN-CS may be used for pollutant degradation, the photosensitized degradation of two trihydroxybenzenes by FMN-CS was studied.
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Affiliation(s)
- Julieta Sacchetto
- Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), CONICET-UNRC, Depto. De Química-FCEF-QyN, Universidad Nacional de Río Cuarto, Río Cuarto, Argentina
| | - Eduardo Gutierrez
- Instituto de Química de San Luis "Dr. Roberto Antonio Olsina" (INQUISAL) Centro Científico Tecnológico CONICET-UNSL, San Luis, Argentina
| | - Guillermo F Reta
- INTEQUI-CONICET, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Almirante Brown 1455, CP 5700, San Luis, Argentina
| | - Eduardo Gatica
- Depto. de Estudios Básicos y Agropecuarios, Facultad de Agronomía y Veterinaria, Universidad Nacional de Río Cuarto, Río Cuarto, Argentina
| | - Sandra Miskoski
- Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), CONICET-UNRC, Depto. De Química-FCEF-QyN, Universidad Nacional de Río Cuarto, Río Cuarto, Argentina
- Depto. de Estudios Básicos y Agropecuarios, Facultad de Agronomía y Veterinaria, Universidad Nacional de Río Cuarto, Río Cuarto, Argentina
| | - María P Montaña
- Instituto de Química de San Luis "Dr. Roberto Antonio Olsina" (INQUISAL) Centro Científico Tecnológico CONICET-UNSL, San Luis, Argentina
| | - José Natera
- Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), CONICET-UNRC, Depto. De Química-FCEF-QyN, Universidad Nacional de Río Cuarto, Río Cuarto, Argentina
- Depto. de Estudios Básicos y Agropecuarios, Facultad de Agronomía y Veterinaria, Universidad Nacional de Río Cuarto, Río Cuarto, Argentina
| | - Walter A Massad
- Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), CONICET-UNRC, Depto. De Química-FCEF-QyN, Universidad Nacional de Río Cuarto, Río Cuarto, Argentina.
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Caminos DA, Rimondino GN, Gatica E, Massad WA, Argüello JE. Riboflavin and Eosin Y Supported on Chromatographic Silica Gel as Heterogeneous Photocatalysts. ACS OMEGA 2023; 8:30705-30715. [PMID: 37636947 PMCID: PMC10448656 DOI: 10.1021/acsomega.3c04622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 07/26/2023] [Indexed: 08/29/2023]
Abstract
The application of photocatalysis for organic synthesis, both in the laboratory and on an industrial scale, will depend on the achieving of good yields and the ease with which it can be applied. Selective irradiation of the photocatalyst with LED light has made it possible to activate the reactions easily, without the need for UV or heat filters. However, a common problem is the need to separate the photocatalyst from the reaction products through extraction and chromatography isolation processes. These procedures make it difficult to recover and reuse the catalyst, which is not compatible with scale-up applications. Photocatalysts attached to heterogeneous supports resulted in an alternative, which facilitates their removal and reuse. In this study, we use chromatographic silica gel as a low-cost heterogeneous support to bind photosensitizers such as Riboflavin or Eosin Y. The modified silica gel was analyzed by FTIR-ATR and diffuse reflectance UV-visible spectroscopy, thermogravimetric analysis, and optical microscopy. These hybrid materials have a suitable size for easy separation by decantation and were found to be photoactive against two photooxidation reactions. These easy-to-handle materials open the door to effective applications for photoinduced organic synthesis methods at medium to large scale.
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Affiliation(s)
- Daniel A. Caminos
- Instituto
de Investigaciones en Fisicoquímica de Córdoba, INFIQC,
Consejo Nacional de Investigaciones Científicas y Técnicas,
CONICET, Ciudad Universitaria, Haya de la Torre y Medina Allende.
Ed Cs II. Córdoba, Córdoba X5000HUA, Argentina
- Departamento
de Química Orgánica, Facultad de Ciencias Químicas,
Universidad Nacional de Córdoba, Ciudad Universitaria, Haya
de la Torre y Medina Allende. Ed Cs II. Córdoba, Córdoba X5000HUA, Argentina
| | - Guido N. Rimondino
- Instituto
de Investigaciones en Fisicoquímica de Córdoba, INFIQC,
Consejo Nacional de Investigaciones Científicas y Técnicas,
CONICET, Ciudad Universitaria, Haya de la Torre y Medina Allende.
Ed Cs II. Córdoba, Córdoba X5000HUA, Argentina
- Departamento
de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria,
Haya de la Torre y Medina Allende. Córdoba, Córdoba X5000HUA, Argentina
| | - Eduardo Gatica
- Instituto
para el Desarrollo Agroindustrial y de la Salud (IDAS). CONICET −
UNRC. Depto. de Estudios Básicos y Agropecuarios, Facultad
de Agronomía y Veterinaria, Universidad
Nacional de Río Cuarto, Rio Cuarto X5804BYA, Argentina
| | - Walter A. Massad
- Instituto
para el Desarrollo Agroindustrial y de la Salud (IDAS), CONICET −
UNRC, Depto. de Química − FCEFQyN, Universidad Nacional de Río Cuarto, Rio Cuarto X5804BYA, Argentina
| | - Juan E. Argüello
- Instituto
de Investigaciones en Fisicoquímica de Córdoba, INFIQC,
Consejo Nacional de Investigaciones Científicas y Técnicas,
CONICET, Ciudad Universitaria, Haya de la Torre y Medina Allende.
Ed Cs II. Córdoba, Córdoba X5000HUA, Argentina
- Departamento
de Química Orgánica, Facultad de Ciencias Químicas,
Universidad Nacional de Córdoba, Ciudad Universitaria, Haya
de la Torre y Medina Allende. Ed Cs II. Córdoba, Córdoba X5000HUA, Argentina
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Pavanello A, Miranda MA, Marin ML. Organic photoredox catalysts for wastewater remediation: Beyond the established advanced oxidation processes. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Sensitized photooxidation of triclosan pesticide. A kinetic study in presence of vitamin B2. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Gambetta C, Reynoso A, Natera J, Sancho MI, Montaña P, Massad WA. Riboflavin sensitized photodegradation of Furaneol in a β-cyclodextrin complex. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113188] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Gatica E, Possetto D, Reynoso A, Natera J, Miskoski S, De Gerónimo E, Bregliani M, Pajares A, Massad WA. Photo-Fenton and Riboflavin-photosensitized Processes of the Isoxaflutole Herbicide. Photochem Photobiol 2018; 95:901-908. [PMID: 30403296 DOI: 10.1111/php.13047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Accepted: 10/30/2018] [Indexed: 01/01/2023]
Abstract
The proherbicide Isoxaflutole (IXF) hydrolyzes spontaneously to diketonitrile (DKN) a phytotoxic compound with herbicidal activity. In this work, the sensitized degradation of IXF using Riboflavin (Rf), a typical environmentally friendly sensitizer, Fenton and photo-Fenton processes has been studied. The results indicate that only the photo-Fenton process produces a significant degradation of the IXF. Photolysis experiments of IXF sensitized by Riboflavin is not a meaningful process, IXF quenches the Rf excited triplet (3 Rf*) state with a quenching rate constant of 1.5 · 107 m-1 s-1 and no reaction is observed with the species O2 (1 Δg ) or O 2 · - generated from 3 Rf*. The Fenton reaction produces no changes in the IXF concentration. While the photo-Fenton process of the IXF, under typical conditions, it produces a degradation of 99% and a mineralization to CO2 and H2 O of 88%. A rate constant value of 1.0 × 109 m-1 s-1 was determined for the reaction between IXF and HO˙. The photo-Fenton process degradation products were identified by UHPLC-MS/MS analysis.
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Affiliation(s)
- Eduardo Gatica
- Departamento de Estudios Básicos y Agropecuarios, Facultad de Agronomía y Veterinaria, UNRC, Río Cuarto, Cordoba, Argentina
| | - David Possetto
- Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC, Río Cuarto, Cordoba, Argentina
| | - Agustina Reynoso
- Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC, Río Cuarto, Cordoba, Argentina
| | - José Natera
- Departamento de Estudios Básicos y Agropecuarios, Facultad de Agronomía y Veterinaria, UNRC, Río Cuarto, Cordoba, Argentina.,Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC, Río Cuarto, Cordoba, Argentina
| | - Sandra Miskoski
- Departamento de Estudios Básicos y Agropecuarios, Facultad de Agronomía y Veterinaria, UNRC, Río Cuarto, Cordoba, Argentina.,Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC, Río Cuarto, Cordoba, Argentina
| | - Eduardo De Gerónimo
- Instituto Nacional de Tecnología Agropecuaria (INTA), Estación Experimental Agropecuaria, Balcarce, Argentina
| | - Mabel Bregliani
- Instituto de Tecnología Aplicada (ITA), UARG-UNPA, Río Gallegos, Argentina
| | - Adriana Pajares
- Instituto de Tecnología Aplicada (ITA), UARG-UNPA, Río Gallegos, Argentina.,Departamento Ingeniería Química, FI, UNPSJB, Comodoro Rivadavia, Argentina
| | - Walter A Massad
- Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC, Río Cuarto, Cordoba, Argentina
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Cacciari RD, Reynoso E, Montejano HA, Biasutti MA. Photodegradation of prednisolone under UVB solar irradiation. Role of photogenerated ROS in the degradation mechanism. Photochem Photobiol Sci 2018; 16:1717-1726. [PMID: 29072760 DOI: 10.1039/c7pp00200a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The use of biologically active substances with anti-inflammatory properties such as corticosteroids has increased considerably in the last few decades. Particularly, the compound we are interested in, prednisolone (Predn), is a glucocorticoid with high biological activity. This compound absorbs UV radiation and may participate in photochemical processes, which can result in its own decomposition. These processes could result in the formation of free radicals or reactive oxygen species (ROS). On these grounds, the kinetic and mechanistic aspects of the direct photodegradation of Predn have been studied in aqueous medium under different atmospheric conditions by stationary and time-resolved techniques. The mechanism involved in the photodegradation has been elucidated. Predn is capable of generating the excited triplet state 3Predn* as a result of UVB light absorption. In the presence of oxygen, 3Predn* allows the formation of ROS, of which O2(1Δg) (ΦΔ = 0.014), H2O2 and the radical OH˙ stand out. The latter is generated from the spontaneous dismutation of O2˙- and subsequent homolytic cleavage, photochemically promoted, of H2O2. Predn undergoes unimolecular photodegradation reactions under an inert argon atmosphere. In this study we found that in the presence of oxygen, the Predn photo-consumption is improved. This implies that the attack by ROS involves a very important additional contribution to the photodegradation of Predn under aerobic conditions.
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Affiliation(s)
- R Daniel Cacciari
- Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional 36 Km 601, X5804BYA Río Cuarto, Córdoba, Argentina.
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