Spectral and kinetic properties of an immunoactive 8-azasteroid and a product of its photochemical transformation in aqueous solutions

Autor:	T. F. Raĭchenok, Sergei A. Tikhomirov, V. L. Dubovskiĭ, G. B. Tolstorozhev, A. L. Mikhal'chuk, Olga V. Gulyakevich
Rok vydání:	2008
Předmět:	Aqueous solution Chemistry Intermolecular force Electronic structure Absorption (chemistry) Luminescence Photochemistry Kinetic energy Atomic and Molecular Physics and Optics Dynamic equilibrium Spectral line Electronic Optical and Magnetic Materials
Zdroj:	Optics and Spectroscopy. 104:875-885
ISSN:	1562-6911 0030-400X
Popis:	The spectral and kinetic properties of an immunoactive 8-azasteroid and a product of its photochemical transformation are studied by the methods of steady-state and transient spectroscopy. It is found that the spectral features of the studied compounds in solvents of different nature are determined by a high sensitivity of the electronic structure of the aminovinyldicarbonyl fragment to intermolecular interactions of the donor-acceptor type. This leads to the existence in solutions of several mesomeric-tautomeric forms that are in a dynamic equilibrium controlled by the experimental conditions. Based on the analysis of the dynamics of the transient spectra of induced absorption and of the spectral and luminescent properties of the extracted photoproduct, the conclusion is made on the direction of the photochemical transformation of 2,3-dimethoxy-8-azagona-1,3,5(10),13-tetraene-12,17-dione and the final product is identified as 6,7-dehydroderivative of the parent compound.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::605b69fd80a48988708c0872e29cfc55 https://doi.org/10.1134/s0030400x08060131 Zobrazit plný text záznamu Plný text ve formátu PDF