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Browsing by Subject "Photochemistry"

Now showing items 1-20 of 26

A Photoactivated Molecular Gate

Agostini, Alessandro; Sancenón Galarza, Félix; Martínez Mañez, Ramón; Marcos Martínez, María Dolores; Soto Camino, Juan; Amoros del Toro, Pedro Jose (Wiley-VCH Verlag, 2012-09-24)

Light-controlled gate: A novel capped silica nanoscopic mesoporous hybrid material for photo-driven cargo release applications has been designed and prepared. The capped system, which shows a zero release, contains a ...
Autonomous artificial nanomotor powered by sunlight

Balzani, V.; Clemente-Leon, M.; Credi, A.; Ferrer Ribera, Rosa Belén; Venturi, M.; Flood, A.H.; Stoddart, J.F. (National Academy of Sciences, 2006-01-31)

Light excitation powers the reversible shuttling movement of the ring component of a rotaxane between two stations located at a 1.3-nm distance on its dumbbell-shaped component. The photoinduced shuttling movement, which ...
Caracterización espectroscópica, a través de técnicas de absorción y emisión, de la interacción fotoinducida entre N-óxidos heterocíclicos y proteínas

Cerdán Flores, Claudia (2020-01-07)

[ES] Los N-óxidos heterocíclicos (NO) son compuestos aromáticos cuyo heteroátomo es el nitrógeno al que está unido un oxígeno a través de un enlace sencillo. Los NO han demostrado una amplia versatilidad como agentes ...
Chemiluminescent determination of the pesticide bromoxynil by on-line photodegradation in a flow-injection assembly

Pawlicova, Z.; Albert-Garcia, J. R.; Sahuquillo, I.; García Mateo, J. V.; Catalá-Icardo, Mónica; Martínez Calatayud, J. (Nihon Bunseki Kagakkai (Japan Society for Analytical Chemistry), 2006-01)

[EN] A new, robust and simple method is proposed for the chemiluminescent determination of the pesticide Bromoxynil. The empirical procedure is performed with the aid of a flow-injection manifold provided with an on-line ...
Computational study on fluoride recognition by an urea-activated phthalimide chemosensor

Pérez Ruiz, Raúl; Griesbeck, Axel G.; Sampedro, Diego (Elsevier, 2012-07-22)

[EN] The mechanism of the fluoride anion recognition by an urea phthalimide chemosensor has been studied in detail by means of CASPT2//CASSCF calculations. Computational data are in well-agreement with changes in the ...
Diastereodifferentiation of novel naphthalene dyads by fluorescence quenching and excimer formation

Abad Fuentes, Sergio; Vayá Pérez, Ignacio; Jiménez Molero, María Consuelo; Pischel ., Uwe; Miranda Alonso, Miguel Ángel (John Wiley & Sons, 2006)

[EN] Four new bichromophoric naphthalene dyads in form of diastereomeric pairs are synthesized and photophysically characterized. For a closely related group of compounds (NAP-NAP MNAP-NAP, MNAP-MNAP), systematic variation ...
Effect of organic species on the solar detoxification of water polluted with pesticides

Soler Escoda, Juan Miguel; Santos-Juanes Jordá, Lucas; Miró Martínez, Pau; Vicente Candela, Rafael; Arques Sanz, Antonio; Amat Payá, Ana María (Elsevier, 2011-04-15)

The effect of organic species on a solar-driven photo-Fenton treatment of a mixture of pesticides (methyl-oxydemethon, methidathion, carbaryl and dimethoate) has been studied in this paper. Triethoxyisododecyl alcohol, ...
Enhancement of the catalytic activity of supported gold nanoparticles for the fenton reaction by light

Navalón Oltra, Sergio; De Miguel de la Torre, Maykel; Martín González, Roberto; Alvaro Rodríguez, Maria Mercedes; García Gómez, Hermenegildo (American Chemical Society, 2011)

[EN] Laser flash photolysis of supported gold nanopar-ticles exciting at the surface plasmon band (532 nm) has allowed in the case of Au/CeO 2 and Au/OH-npD (OH-npD: Fenton-treated diamond nanoparticles) detection of ...
Estudio fotoquímico y fotofísico del fármaco Sulindaco y sus metabolitos en medios biológicos

Calero Pons, Elena (2019-09-04)

[ES] En este trabajo se ha estudiado la fotorreactividad del fármaco sulindaco (SLD), que es un antiinflamatorio no esteroideo (AINE), en disolución y en presencia de proteínas. También se ha investigado la fotorreactividad ...
Evidence of Photoinduced Charge Separation in the Metal-Organic Framework MIL-125(Ti)-NH2

De Miguel de la Torre, Maykel; Ragon, Florence; Devic, Thomas; Serre, Christian; Horcajada Campos, Patricia; García Gómez, Hermenegildo (Wiley-VCH Verlag, 2012-11-12)

[EN] Herein, we describe the photochemical behavior of the porous metal¿organic framework MIL-125(Ti)-NH2, built up from cyclic Ti8O8(OH)4 oxoclusters and 2-aminoterephthalate ligands. While MIL-125(Ti)-NH2 does not emit ...
Gas-Phase Photochemical Overall H2 S Splitting by UV Light Irradiation

Garcia-Baldovi, Hermenegildo; Albero-Sancho, Josep; Ferrer Ribera, Rosa Belén; Mateo-Mateo, Diego; Alvaro Rodríguez, Maria Mercedes; García Gómez, Hermenegildo (John Wiley & Sons, 2017)

[EN] Splitting of hydrogen sulfide is achieved to produce valueadded chemicals. Upon irradiation at 254 nm in the gas phase and in the absence of catalysts or photocatalysts at near room temperature, H2S splits into ...
Mechanistic Studies on the Photoallergy Mediated by Fenofibric Acid: Photoreactivity with Serum Albumins

Vayá Pérez, Ignacio; Andreu Ros, María Inmaculada; Monje-López, Vicente Tomás; Jiménez Molero, María Consuelo; Miranda Alonso, Miguel Ángel (American Chemical Society, 2016-01)

[EN] The photoreactivity of fenofibric acid (FA) in the presence of human and bovine serum albumins (HSA and BSA, respectively) has been investigated by steady-state irradiation, fluorescence, and laser flash photolysis ...
Metal Nanoparticles as Heterogeneous Fenton Catalysts

Dhakshinamoorthy, Amarajoth; Navalón Oltra, Sergio; Alvaro Rodríguez, Maria Mercedes; García Gómez, Hermenegildo (Wiley-VCH Verlag, 2012-01-09)

[EN] The Fenton reaction (the generation of hydroxyl radicals from hydrogen peroxide) is the most useful method for degradation of organic pollutants in aqueous solution at moderate concentrations. In this Review we summarize ...
Photochemistry of 1,3-Dicarbonyl Compounds: DNA Photodamage vs. Photoprotection

Aparici Espert, María Isabel (2018-07-13)

El objetivo principal de esta tesis es contrastar el papel de dichos compuestos 1,3-dicarbonilicos como agentes que dañan el ADN con respecto a su potencial fotoprotector. Primero, 5,6-dihidropirimidinas han sido ...
Photochemistry of charge-transfer complexes in a viologen periodic mesoporous organosilica: Time evolution from femtoseconds to minutes

Alvaro Rodríguez, Maria Mercedes; Ferrer Ribera, Rosa Belén; García Gómez, Hermenegildo; Hashimoto, Shuichi; Hiratsuka, Masahiro; Asahi, Tsuyoshi; Masuhara, Hiroshi (Wiley-VCH Verlag, 2014-07)

Persistent radical cations can be generated in V∝PMO, a periodic mesoporous organosilica incorporating a viologen in its silicate framework. Photoexcitation of V∝PMO forms a geminate viologen–halide ion pair that can undergo ...
Photogeneration of Quinone Methides as Latent Electrophiles for Lysine Targeting

Pérez Ruiz, Raul; Molins-Molina, Oscar; Lence, Emilio; González-Bello, Concepción; Miranda Alonso, Miguel Ángel; Jiménez Molero, María Consuelo (American Chemical Society, 2018-11-02)

[EN] Latent electrophiles are nowadays very attractive chemical entities for drug discovery, as they are unreactive unless activated upon binding with the specific target. In this work, the utility of 4-trifluoromethyl ...
Photoinduced electron flow in a self-assembling supramolecular extension cable

Ferrer Ribera, Rosa Belén; Rogez, Guillaume; Credi, Alberto; Ballardini, Roberto; Gandolfi, Maria Teresa; Balzani, Vincenzo; Liu, Yi; Tseng, Hsian-Rong; Stoddart, J. Fraser (National Academy of Sciences, 2006-07-28)

We report the design, bottom-up construction, characterization, and operation of a supramolecular system capable of mimicking the function played by a macroscopic electrical extension cable. The system is made up of a ...
Photosensitization of DNA by 5-methyl-2pyrimidone deoxyribonucleoside: (6-4) photoproduct as a posible trojan horse

Vendrell Criado, Victoria; Rodríguez Muñiz, Gemma María; Cuquerella Alabort, Maria Consuelo; Lhiaubet, Virginie Lyria; Miranda Alonso, Miguel Ángel (Wiley-VCH Verlag, 2013-06-17)

A (photo)sensitive subject: Combined agarose gel electrophoresis and photochemical studies show that 5-methyl-2-pyrimidone (see picture), the main chromophore of (6-4) photoproducts, behaves as a DNA photosensitizer. These ...
Probing lipid peroxidatin by using linoleic acid and benzophenone

Andreu Ros, María Inmaculada; Neshchadin, Dmytro; Rico Inglada, Enrique; Griesser, Markus; Samadi, Abdelouahid; Morera Bertomeu, Isabel María; Gescheidt, Georg; Miranda Alonso, Miguel Ángel (Wiley-VCH Verlag, 2011-07-26)

A thorough mechanistic study has been performed on the reaction between benzophenone (BZP) and a series of 1,4-dienes, including 1,4-cyclohexadiene (CHD), 1,4-dihydro-2-methylbenzoic acid (MBA), 1,4-dihydro-1,2-dimethylbenzoic ...
Reactivity of Nucleosides with a Hydroxyl Radical in Non-aqueous Medium

Rodríguez Muñiz, Gemma María; Marín García, Mª Luisa; Lhiaubet, Virginie Lyria; Miranda Alonso, Miguel Ángel (Wiley-VCH Verlag, 2012-06-25)

DNA damage: The reactivity of HO. with silylated 2¿-deoxyribonucleosides was investigated in acetonitrile by means of a time-resolved technique. The obtained rate constants were in general slightly lower than those reported ...