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Converging fate of the oxidation and reduction of 8-thioguanosine
(Molecular Diversity Preservation International, 2019-08)
Thione-containing nucleobases have attracted the attention of the scientific community for their application in oncology, virology, and transplantology. The detailed understanding of the reactivity of the purine derivative ...
Photophysical properties of safranine and phenosafranine. A comparative study by laser flash photolysis and laser induced optoacoustic spectroscopy
(Elsevier Science Sa, 2005-07)
The triplet quantum yield of the dyes safranine and phenosafranine was determined in methanol and acetonitrile by laser flash photolysis (LFP) and laser induced opto-acoustic spectroscopy (LIOAS). The excited singlet ...
Líquido iônico [bmim.PF6] como solvente: um meio conveniente para estudos por fotólise por pulso de laser
(2009)
The spectroscopic behavior of thioxanthone and benzil (diphenylethanedione or dibenzoyl) in the ionic liquid [bmim.PF6] has been investigated employing the laser flash photolysis technique. Triplet-triplet absorption spectra ...
Photochemical study of Eosin-Y with PAMAM dendrimers in aqueous solution
(Elsevier Science, 2016-04)
A steady-state and time-resolved study of the xanthene dye Eosin-Y (Eos) in the presence of amino-terminated polyamidoamine (PAMAM) dendrimers in alkaline aqueous solution is presented. Stationary photolysis experiments ...
Phenolic hydrogen abstraction by the triplet excited state of thiochromanone: a laser flash photolysis study
(2010)
O estado excitado triplete de cetonas pode oxidar substratos biológicos acarretando danos a diversas biomoléculas como aminoácidos, nucleosídeos e mesmo DNA. Como parte de nossos estudos acerca da interação entre carbonilas ...
Direct Irradiaton of Aryl Sulfides: Homolytic Fragmentation and Sensitized S-Oxidation
(American Chemical Society, 2017-09)
The direct irradiation of diphenyl sulfide and p-substituted thioanisoles in the presence of oxygen was investigated by means of both steady state and laser flash photolysis experiments. Two competitive pathways took place ...
Excited states quenching of phenosafranine dye by electron donors
(Elsevier Science Sa, 2005-03)
The quenching of the excited singlet and triplet states of phenosafranine by aromatic amines, methoxybenzenes and triethanolamine was investigated in acetonitrile and methanol. The rate constants for the aromatic quenchers ...
Photochemical cyclization of thioformanilides by chloranil: An approach to 2-substituted benzothiazoles
(Pergamon-Elsevier Science Ltd, 2009-08)
2-Substituted benzothiazoles were efficiently synthesized by radical cyclization of thioformanilides induced by chloranil under irradiation in 1,2-dichloroethane and toluene at 80 °C. Hydrogen atom abstraction from ...
Nitric oxide release from the S-nitrosothiol zinc phthalocyanine complex by flash photolysis
(Associação Brasileira de Divulgação Científica, 2012)