ESR kinetic study of the photobleaching of chlorine dioxide solutions at 303, 365 and 436 nm

Autor:	M. E. J. Coronel, María Sandra Churio, E. Ghibaudi, M. A. Brusa, Agustín J. Colussi, L. J. Perissinotti
Rok vydání:	1995
Předmět:	Chemistry Photodissociation Solvatochromism Analytical chemistry General Physics and Astronomy Photochemistry Kinetic energy Mass spectrometry Photobleaching law.invention Wavelength law Physical and Theoretical Chemistry Electron paramagnetic resonance Polarization (electrochemistry)
Zdroj:	Chemical Physics Letters. 232:237-241
ISSN:	0009-2614
DOI:	10.1016/0009-2614(94)01355-y
Popis:	Initial quantum yields for the photobleaching of OClO dissolved in CCl_4 at 298 K are measured by electron spin resonance spectrometry at three wavelengths, under 1 atm of either N_2 or O_2. Yields are unaffected at 365 nm, but increase by about 45% at 303 and 436 nm, when O_2 is replaced by N_2. These results, at variance with gas-phase photolysis, suggest a qualitative change in the mechanism of photofragmentation at ≈365 nm. We show that OClO solvatochromic shifts are controlled by the dynamic polarization of the medium, rather than by a modification of the energies of the states involved.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::86cfe46e8f73d2fd488772948e6e47f2 https://doi.org/10.1016/0009-2614(94)01355-y Zobrazit plný text záznamu Full Text from ScienceDirect