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Photochemistry of aliphatic aldehydes
(1980)
The photochemistry of alkanals in dilute solutions and in the presence of olefins and hydrogen donors was analysed and the results obtained are discussed taking as reference the photochemical behaviour of the alkanones. ...
PHOTOCHEMISTRY OF 1‐PYRENYLDIAZOMETHANE
(1991)
Photoexcitation of 1‐pyrenyldiazomethane (1) leads to carbenes which attach to various molecules, e.g. surfactants, polymers, hydroxylated surfaces. This provides a convenient method of labelling these compounds with pyrene ...
Temperature Dependence of the Photochemistry of Aryl Alkyl Ketones
(1983)
The photochemistry of several phenyl alkyl and p-anisyl alkyl ketones has been examined using laser flash photolysis and conventional quantum yield techniques. The methoxy-substituted ketones show higher activation energies ...
Thermodynamic and Kinetic Study of the Interaction between Alkylpyridinium Ions and Pyrene Derivatives in Aqueous Solution
(American Society for Photobiology, 1997)
The kinetics of fluorescence quenching of pyrene and three of its derivatives by a series of n-alkylpyridinium ions has been studied. The quenching process is diffusion controlled for all the systems studied, independent ...
Deactivation of excited singlet aromatic hydrocarbons by metallic ions in ethanol-water solution
(1987)
The deactivation of a number of excited polycyclic aromatic hydrocarbons by copper(II), cobalt(II), nickle(II) and chromium(III) in ethanol-water (1:1 by volume) has been investigated. In spite of the fact that most of the ...
The effects of gamma radiation on aqueous solutions of 2'-3' uridylic acid
(1968)
The free radicals induced by gamma radiation in deaerated aqueous solutions of 2′‐3′ uridylic acid at 77°K have been studied by electron spin resonance techniques. The annealing at 193°K of the OH radical trapped at 77°K ...
Variations in UV radiation in Chile
(1995)
The first observation of UV global radiation in Chile with a portable multichannel radiometer are reported. Four UV wavelengths are included: 305, 320, 340 and 380 nm. Observation latitudes spanning from 18° to 53 °S allow ...
Determination of chemical rate constants in singlet molecular oxygen reaction by using 1,4-dimethylnaphthalene endoperoxide
(2002)
Thermal decomposition of 1,4-dimethylnaphthalene endoperoxide (DMNE) as a source of singlet oxygen was used to measure chemical rate constants, k(R), for reactions between singlet oxygen, O-2((1)Delta(g)), and various ...
Solar ultraviolet A radiation and nonmelanoma skin cancer in Arica, Chile
(Elsevier, 2020)
In this work, we present the maximum daily values of solar ultraviolet A radiation (UV-A) as a function of time. The results indicated that such values reached a maximum of 93.9 W/m(2) in 2010 and a minimum of 16.5 W/m(2) ...
Line defect Ce3+ induced Ag/CeO2/ZnO nanostructure for visible-light photocatalytic activity
(Elsevier Science SA, 2018)
This article reports, synthesis and characterization of the ternary Ag/CeO2/ZnO nanostructure which was tested for visible light photocatalytic degradation of industrial textile effluent. The HR-TEM and XPS results confirms ...