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Browsing by Subject "Singlet oxygen"

Now showing items 1-14 of 14

A mechanistic study on the potential of quinolinium salts as photocatalysts for the abatement of chlorinated pollutants

Martínez-Haya, Rebeca; Sabater Marco, Consuelo; Castillo López, María-Ángeles; Miranda Alonso, Miguel Ángel; Marín García, Mª Luisa (Elsevier, 2018-06)

[EN] Photocatalytic degradation of three highly chlorinated contaminants, namely 2,4,6-trichlorophenol (TCP), 2,4,6-trichloroanisole (TCA) and 5-chloro-2-(2,4-dichlorophenoxy)phenol (triclosan, TCS) has been investigated ...
A spectroscopic study to assess the photogeneration of singlet oxygen by graphene oxide

Felip-León, Carles; Puche Panadero, Marta; Miravet, Juan F.; Galindo, F.; Feliz Rodriguez, Marta (Elsevier, 2019-09-15)

[EN] The photogeneration of singlet oxygen (O-1(2) ) during short irradiation times of graphene oxide (GO) is assessed under visible light with soft irradiation conditions either directly monitoring the phosphorescence ...
Evaluación in vitro de nuevos agentes fotosensibilizantes con aplicación en terapia fotodinámica para el tratamiento del melanoma humano

Estellés Díaz, Carlos (Universitat Politècnica de València, 2020-07-24)

[ES] El melanoma, originado en los melanocitos, es un tipo de cáncer de piel invasivo, con alta tendencia a metastatizar y que presenta una elevada resistencia a fármacos. En la actualidad, los tratamientos convencionales ...
Novel Mechanistic Insights on the Photoredox Degradation of CECs Using Organic Photocatalysts

Pavanello, Alice (Universitat Politècnica de València, 2022-12-30)

[ES] La demanda de agua y la contaminación del agua son dos problemas ligados no solo de los últimos años sino también para el futuro. Mucho se ha hecho en el pasado para eliminar los contaminantes emergentes (CEC) de los ...
Phosphorogenic dipyrrinato-iridium(III) complexes as photosensitizers for photodynamic therapy

Prieto-Castañeda, A.; Lérida-Viso, A.; Avellanal-Zaballa, E.; Sola-Llano, R.; Bañuelos, J.; Agarrabeitia, A.R.; Martínez-Máñez, Ramón; Ortiz, M.J. (Elsevier, 2022-01)

[EN] We have designed and synthesized a family of Ir(III) metal complexes coordinated with two cyclometalated bisfluorophenylpyridine ligands and an ancillary dipyrromethene which is functionalized with a mesityl group (Ir ...
Photocatalytic degradation of drugs in water mediated by acetylated riboflavin and visible light: A mechanistic study

Pavanello, Alice; Fabbri, Debora; Calza, Paola; Battiston, Debora; Miranda Alonso, Miguel Ángel; Marín García, Mª Luisa (Elsevier, 2021-08)

[EN] There is a current concern, among the scientific community, on the pollutants classified as "persistent organic pollutants (POPs)". Pharmaceuticals and personal care products (PPCPs) belong to this family of contaminants; ...
Photoreactivity of new rose bengal-SiO2 heterogeneous photocatalysts with and without a magnetite core for drug degradation and disinfection

Flores, Jenny; Moya Sanz, Mª Del Pilar; Bosca Mayans, Francisco; Marín García, Mª Luisa (Elsevier, 2023-03-15)

[EN] The main drawback of homogeneous photocatalysis is the difficult separation of the photocatalysts from the reaction media after treatment completion; thus, heterogeneous photocatalysis represents a step forward in ...
Photoredox catalysis for environmental and chemical applications. A mechanistically-based approach

Martínez Haya, Rebeca (Universitat Politècnica de València, 2019-01-04)

En las últimas décadas, los procesos redox fotoinducidos mediados por luz visible han recibido gran atención debido a las suaves condiciones de operación en que se llevan a cabo. Como resultado, se han logrado posicionar ...
Reactivity of phenolic compounds as antioxidants determined by photophysical techniques

Saez Ferre, Sara (Universitat Politècnica de València, 2014-09-24)

[EN] Different phtophysical techniques have been employed to evaluate the antioxidant capability of a selected group of phenolic compounds. Thus, reactivity against singlet oxygen, hydroxyl radical as well as hydrogen donor ...
Scope and limitations of the TEMPO/EPR method for singlet oxygen detection: the misleading role of electron transfer

Nardi, Giacomo; Manet, Ilse; Monti, Sandra; Miranda Alonso, Miguel Ángel; Lhiaubet-Vallet, Virginie (Elsevier, 2014-12)

For many biological and biomedical studies, it is essential to detect the production of O-1(2) and quantify its production yield. Among the available methods, detection of the characteristic 1270-nm phosphorescence of ...
Transient UV-vis absorption spectroscopic characterisation of 2 '-methoxyacetophenone as a DNA photosensitiser

Rodriguez-Alzueta, Ofelia; Cuquerella Alabort, Maria Consuelo; Miranda Alonso, Miguel Ángel (Elsevier, 2019-07-05)

[EN] 2'-Methoxyacetophenone (2M) presents improved UVA absorption as compared with other acetophenone derivatives. On the basis of transient infrared spectroscopy it has been previously claimed that 2M is an interesting ...
Triplet photosensitization mechanism of thymine by an oxidized nucleobase: from a dimeric model to DNA environment

Francés-Monerris, Antonio; Hognon, Cécilia; Miranda Alonso, Miguel Ángel; Lhiaubet, Virginie Lyria; Monari, Antonio (The Royal Society of Chemistry, 2018-10-28)

[EN] Nucleic acids are constantly exposed to external agents that can induce chemical and photochemical damage. In spite of the great advances achieved in the last years, some molecular mechanisms of DNA damage are not ...
Type I vs Type II photodegradation of pollutants

Martínez-Haya, Rebeca; Miranda Alonso, Miguel Ángel; Marín García, Mª Luisa (Elsevier, 2018-09-01)

[EN] Rose Bengal (RB) is a widely used photocatalyst due to its high quantum yield of singlet oxygen (O-1(2)) formation. Hence, when RB has been employed for wastewater remediation, the observed photodegradation has been ...
Waste cleaning waste: Photodegradation of monochlorophenols in the presence of waste-derived photosensitizer

Avetta, P.; Bella, F.; Prevot, A. Bianco; Laurenti, E.; Montoneri, E.; Arques Sanz, Antonio; Carlos, L. (American Chemical Society, 2013)

Soluble bio-based substances (SBO) have been isolated from urban waste. Their structural similarity with natural organic matter suggested exploring their activity in the photodegradation of organic substrates. In this ...