Zobrazeno 1 - 10
of 179
pro vyhledávání: '"Peter P. Levin"'
Autor:
Peter P. Levin, Silvia M. B. Costa
Publikováno v:
International Journal of Photoenergy, Vol 4, Iss 4, Pp 161-171 (2002)
The kinetics of triplet state decay and concomitant delayed fluorescence of tetraphenylporphyrin (TPP) incorporated into the multilayers of n-decanol adsorbed on the external surface of zeolites at different temperatures were studied by the laser fla
Externí odkaz:
https://doaj.org/article/08304d942e9c44179060f74466ae1d2f
Autor:
Peter P. Levin, Igor V. Khudyakova
Publikováno v:
Mini-Reviews in Organic Chemistry. 18:830-835
In this brief review, we consider the generation of free radicals by irradiation with UVlight solutions of compounds with weak chemical bonds. Bond Dissociation Energies (BDE) are compared with the energies of photons. Light sources used in industry
Publikováno v:
Coatings
Volume 13
Issue 2
Pages: 300
Volume 13
Issue 2
Pages: 300
The properties of new coatings with nanopigments (NPs) prepared by the dye mixture treatment of montmorillonite modified with cationic surfactants were investigated. The colorimetric parameters of polymer films with nanopigments were determined. The
Publikováno v:
Russian Journal of Physical Chemistry B. 14:488-491
It is believed that one of the causes of photodamage to the retina is the accumulation of all-trans-retinal (ATR) in the visual cells. However, the ATR is formed during photolysis inside the disk of the photoreceptor cell and transferred to the cytop
Autor:
I. R. Mardaleishvili, N. L. Zaichenko, Alexander S. Tatikolov, A. V. Lyubimov, A. I. Shienok, L. S. Kol’tsova, Peter P. Levin, G. V. Lyubimova
Publikováno v:
High Energy Chemistry. 54:15-23
The spectral and luminescent properties of compounds A3–SA, A4–o–SA, and A4–o–K have been studied, whose structures include moieties of triphenylimidazole A3, tetraphenylimidazole A4, and hydroxyazomethines salicylideneaniline SA and coumar
Publikováno v:
Russian Journal of Physical Chemistry B. 14:522-524
The results of kinetic studies of the recombination of radicals in the cage and in bulk of polymers obtained by nanosecond laser photolysis are summarized. The films of rubbers (poly(ethylene-co-butylene)), biaxially oriented polypropylene depending
Autor:
L. S. Kol’tsova, Peter P. Levin, Alexander S. Tatikolov, I. R. Mardaleishvili, A. I. Shienok, G. V. Lyubimova, N. L. Zaichenko, A. V. Lyubimov
Publikováno v:
High Energy Chemistry. 53:13-21
The photochromic properties of new di- and tetranitrobisspiropyrans have been studied. Dinitrobisspiropyran solutions are characterized by direct photochromism, whereas reverse photochromism—coloration of the solution in the dark and its discolorat
Publikováno v:
The Journal of chemical physics. 151(21)
The geminate recombination kinetics of the triplet pairs of neutral radicals formed as a result of hydrogen atom transfer from 4-methylphenol to 4,4′-dimethylbenzophenone in the triplet excited state was studied by laser flash photolysis in the tem
Autor:
Peter P. Levin, Igor V. Khudyakov
Publikováno v:
Modern Concepts in Material Science. 2
Autor:
Peter P. Levin, G. V. Lyubimova, Alexander S. Tatikolov, N. L. Zaichenko, A. I. Shienok, L. S. Kol’tsova, I. R. Mardaleishvili
Publikováno v:
High Energy Chemistry. 52:240-248
The effect of OMe and NO2 substituents in the phenol ring of hydroxytetraphenylimidazole (HTPI) derivatives on their luminescence in solutions and in the solid phase has been studied. The presence of the nitro group leads to multiple luminescence. In