A5051402470- Photodynamic Therapy Research Studies
- Pharmaceutical and Antibiotic Environmental Impacts
- bioluminescence and chemiluminescence research
- Photochemistry and Electron Transfer Studies
- Advanced oxidation water treatment
- Porphyrin and Phthalocyanine Chemistry
- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- Light effects on plants
- Radioactive element chemistry and processing
- Photochromic and Fluorescence Chemistry
- Crystallization and Solubility Studies
- Nanoplatforms for cancer theranostics
- X-ray Diffraction in Crystallography
- Lanthanide and Transition Metal Complexes
- Porphyrin Metabolism and Disorders
- Insect and Pesticide Research
- Analytical Chemistry and Sensors
- Free Radicals and Antioxidants
- Luminescence and Fluorescent Materials
- Radical Photochemical Reactions
- Crystallography and molecular interactions
- Skin Protection and Aging
- Bee Products Chemical Analysis
- Pesticide and Herbicide Environmental Studies
Consejo Nacional de Investigaciones Científicas y Técnicas
2020-2024
National University of Río Cuarto
2013-2024
Institut Químic de Sarrià
2010-2020
Universitat Ramon Llull
2010-2020
Universitat de Barcelona
2010
National University of Austral Patagonia
2008
Universidad Nacional de Córdoba
1999-2005
The thermal cis-to-trans isomerisation process has been studied for a series of para-, ortho- and polyhydroxy-substituted azobenzenes in different solvents. kinetics the back reaction p-hydroxy-substituted depend strongly on nature solvent used, with relaxation times ranging from 200-300 milliseconds ethanol to half an hour toluene. Otherwise, rate is mainly independent ortho substituted analogues. Polyhydroxy-substituted show very much faster than para- monohydroxyazoderivatives. With 6-12...
The acaricide abamectin is a mixture of two colorless homologues in molar ratio at least 4:1 with the same structure macrocyclic lactone. kinetics its degradation under direct (254 nm) and dye-sensitized (>400 photoirradiation methanol solution has been studied by UV−vis spectrophotometry, potentiometric detection dissolved oxygen, stationary fluorescence, laser flash photolysis, time-resolved singlet molecular oxygen (O2(1Δg)) phosphorescence. results indicate that very efficient...
The usefulness of azopyridinium methyl iodide salts for designing new promising light-controlled molecular switches is presented. Large absorbance changes have been produced in the samples by irradiation with light at λ = 355 nm. thermal recovery initial state took place completely within 130−450 ms, which much faster than that reported previously other push−pull azobenzene-doped nematic mixtures.
Kinetic and mechanistic aspects on the stability of flavones (FL) quercetin (Que), morin (Mor) rutin (Rut), in methanolic solution presence reactive oxygen species (ROS) generated by visible light-promoted riboflavin (Rf, vitamin B(2)) photoirradiation were studied. The system was chosen as a model for evaluation vivo protective effect biological targets flavones. overall picture includes an endogenous natural photosensitizer. A systematic study ROS FL photostability shows that under work...
Optical detection of singlet oxygen, a reactive oxygen species that plays crucial role in variety biomedical processes, is hampered by its extremely low emission probability. Using plasmonic effects induced silver islands films coated with C60, we have been able to enhance the near-IR phosphorescence factor ca. 35. Both an enhanced production via plasmon-induced light absorption and perturbation radiative rate constant are shown account for this effect. The dependence enhancement on...
Reactions in aqueous solution under hydrothermal conditions between (±)-2,3-dimethylsuccinic acid and lanthanide chlorides lead to two different isostructural types with chemical formulas [Ln2(C6H8O4)3(H2O)2] Ln(III) = Pr–Eu (except Pm) (Type I, compounds 1–4) [Ln2(C6H8O4)3] Tb–Yb Tm) II, 5–9). The crystal structure has been solved for the Pr (1)-, Sm (3)-, Ho (7)-containing by means of single-crystal XRD methods, whereas powder Rietveld refinement was used rest MOFs. Compounds 1–4...
Kinetics and mechanism of the photo-oxidation natural catecholamine-type neurotransmitter dopamine (DA) has been studied in aqueous solution, under aerobic conditions, presence riboflavin (Rf, vitamin B(2)) as a photosensitizer. Results indicate formation weak dark complex Rf-DA, with mean apparent association constant K(ass) = 30 m(-1), only detectable at DA concentrations much higher than those employed photochemical experiments. An intricate competitive reactions operates upon...
The sensitized photooxidation promoted by daylight-absorbing compounds appears as a plausible course to produce the photodegradation of catecholamines. We report kinetics and mechanism vitamin B2 (riboflavin [Rf])–sensitized isoproterenol (Iso), synthetic sympathomimetic drug structurally related epinephrine, using water solvent. A weak dark complex Rf–Iso is formed, only detectable at relatively high Iso concentrations (>10 mM), with mean value 13 ± 3 M−1 for apparent association constant....
Abstract The known O 2 ( 1 ∆ g )‐sensitizer system Chitosan bounded Rose Bengal (CH‐RB), with (RB) immobilized by irreversible covalent bonding to the polymer (CH), soluble in aquous acidic medium, was employed photodegradation of three tri‐hydroxy benzene water‐contaminants (THBs). sensitizes )‐mediated THBs a process kinetically favored, as compared that employing free RB dissolved same solvent. Additionally xanthene dye, degradable ) through self‐sensitization upon prolonged...