Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Viktor Řehák"'
Autor:
Viktor Řehák
Publikováno v:
Collection of Czechoslovak Chemical Communications. 52:1666-1671
The quantum yields of formation of the methylviologen cation-radical were measured, the effect of pH was studied, and the possibility of photogeneration of hydrogen was examined for systems with disodium 1,5- and 1,8-anthracenedisulphonate in aqueous
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67af8152440abf12e0ea3d485296233e
https://doi.org/10.1135/cccc19871666
https://doi.org/10.1135/cccc19871666
Publikováno v:
Collection of Czechoslovak Chemical Communications. 44:1772-1778
Photolysis of 1,2-naphthoquinone-1-diazide and 9,10-phenathrenequinonediazide in cyclohexane gives coloured products decomposing on further irradiation. Formation of the products and their concentration depends on the way of irradiation (short, conti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8bc738789827682d4b759d38bade41fe
https://doi.org/10.1135/cccc19791772
https://doi.org/10.1135/cccc19791772
Autor:
Viktor Řehák, Vladimír Kadeřábek
Publikováno v:
Collection of Czechoslovak Chemical Communications. 44:1613-1618
Electronic absorption spectra of N-alkyl and N-arylsubstituted 2,4-dinitro- and 2,6-dinitroanilines are discussed in the terms of energy and intensity of the energetically lowest absorption transitions and molecular structure (intramolecular hydrogen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e11cdebb36829e69ea39f937215abfe2
https://doi.org/10.1135/cccc19791613
https://doi.org/10.1135/cccc19791613
Autor:
Viktor Řehák, Jaroslav Poskočil
Publikováno v:
Collection of Czechoslovak Chemical Communications. 44:2015-2023
Besides population and relaxation of T1 state of methylene blue in methanolic solution it has been possible to observe increase and decomposition of a transient with longer lifetime which is probably a triplet excimer of the dyestuff. Kinetic measure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c8282b3953def45c947bf4da051b8dc
https://doi.org/10.1135/cccc19792015
https://doi.org/10.1135/cccc19792015
Autor:
Jana Boledovičová, Viktor Řehák
Publikováno v:
Collection of Czechoslovak Chemical Communications. 52:1658-1665
Disodium 1,5- and 1,8-anthracenedisulphonate (ADS) and 9-acetylanthracene form coloured CT complexes with methylviologen (MV2+) in aqueous and micellar media. The complex formation constants and molar absorptivities were determined by the Benesi-Hild
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2113092bfa973c0e2602e857e31a1d21
https://doi.org/10.1135/cccc19871658
https://doi.org/10.1135/cccc19871658
Publikováno v:
Collection of Czechoslovak Chemical Communications. 45:307-320
Absorption, fluorescence excitation and APF spectra of cryptocyanine have been measured. Dipole moment of the respective S1 excited state has been estimated from shifts of the marked maximum of the first absorption band in various solvents. On the ba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ac87b2574df6b60da8f7c704ac56f1b
https://doi.org/10.1135/cccc19800307
https://doi.org/10.1135/cccc19800307
Publikováno v:
Collection of Czechoslovak Chemical Communications. 44:756-761
The photolysis of 9,10-phenanthrenequinonediazide and 1,2-naphthoquinonediazide derivatives was studied; the spectral changes occurring during the photolysis and the quantum yields for various excitation wavelengths were measured, the order of the re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba50a34a94476d5849714faa8c558c49
https://doi.org/10.1135/cccc19790756
https://doi.org/10.1135/cccc19790756
Autor:
Yvona Rybová, Viktor Řehák
Publikováno v:
Collection of Czechoslovak Chemical Communications. 53:1-9
In the micellar medium of sodium dodecyl sulphate the monomer-dimer equilibrium of methylene blue is shifted markedly in favour of the monomer. Methylene blue quenches the fluorescence of pyrene solvated in micelles, which is explained in terms of re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0f98ff53d0efe449332d3f18d69c5f9
https://doi.org/10.1135/cccc19880001
https://doi.org/10.1135/cccc19880001