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Selective quenching of triplet excited states of pteridines
(Royal Society of Chemistry, 2014-06)
Steady-state and time-resolved studies on quenching of excited states of pterin (Ptr) and lumazine (Lum) in the presence of iodide in aqueous solution have been performed. In contrast to the typical iodide enhancement in ...
Comparison of the Kinetics of Electron Transfer in the Diffusion Limit for the Singlet and Triplet Quenching of Eosin Y by Quinones
(Wiley, 2013-06)
Electron transfer (ET) rate constants were determined by means of lifetime measurements for the fluorescence quenching and by laser flash photolysis for the triplet quenching of the dye eosin Y by benzoquinones in acetonitrile. ...
Photophysics of thionine in AOT and BHDC reverse micelles. Quenching of the triplet state by aliphatic amines studied by transient absorption spectroscopy
(Elsevier Science Sa, 2017-09)
The photophysics of thionine (3,7-diamino-5-phenothiazinium) (Th+) was investigated in reverse micelles (RMs) of sodium bis(2-ethylhexyl)sulfosuccinate (AOT) and benzyldimethylhexadecylammonium chloride (BHDC) with special ...
Excited state kinetics in crystalline solids: Self-quenching in nanocrystals of 4,4′-disubstituted benzophenone triplets occurs by a reductive quenching mechanism
(American Chemical Society, 2011-11)
We report an efficient triplet state self-quenching mechanism in crystals of eight benzophenones, which included the parent structure (1), six 4,4′-disubstituted compounds with NH 2 (2), NMe 2 (3), OH (4), OMe (5), COOH ...
Triplet state quenching of phenosafranine dye by indolic compounds studied by transient absorption spectroscopy
(Royal Society of Chemistry, 2015-02)
The interaction of the triplet state of the synthetic dye phenosafranine (3,7-diamino-5-phenylphenazinium chloride) with indolic compounds of biological relevance was investigated in water by means of laser flash photolysis. ...
Study on the triplet states of N-phenyl carbazoles: Transient spectra and singlet oxygen generation
(Elsevier Science SA, 2020-06)
Here we report a study on the photophysics of a series of N-phenyl-carbazoles (N-Ph-Czs) in homogenous solvents and micellar media. The compounds investigated were TCz (N-tolyl-carbazole), TCz-TCz (a 3,3´-linked dimer), ...
Quenching of the Singlet and Triplet Excited States of Pterin by Amino Acids
(Wiley Blackwell Publishing, Inc, 2019-01)
Unconjugated oxidized pterins accumulate in the skin of patients suffering from vitiligo and, under UVA irradiation, photosensitize the oxidation of amino acids. In this work, we study the interaction of the singlet and ...
Photophysics of Xanthene Dyes at High Concentrations in Solid Environments: Charge Transfer Assisted Triplet Formation
(Wiley Blackwell Publishing, Inc, 2018-09)
The photophysical behavior of two xanthene dyes, Eosin Y and Phloxine B, included in microcrystalline cellulose particles is studied in a wide concentration range, with emphasis on the effect of dye concentration on ...
Noniterative Doubles Corrections to the Random Phase and Higher Random Phase Approximations: Singlet and Triplet Excitation Energies
(John Wiley & Sons Inc, 2019-10)
The second-order noniterative doubles-corrected random phase approximation (RPA) method has been extended to triplet excitation energies and the doubles-corrected higher RPA method as well as a shifted version for calculating ...
Triplet state of 4-methoxybenzyl alcohol chemisorbed on silica nanoparticles
(Royal Society of Chemistry, 2012-06)
The knowledge of photochemical kinetics in colloidal systems is important in understanding environmental photochemistry on dispersed solid surfaces. As model materials for the chemically sorbed organic compounds present ...