Počet záznamů: 1
Photooxidation of Aniline Derivatives Can Be Activated by Freezing Their Aqueous Solutions
- 1.
SYSNO ASEP 0483886 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Photooxidation of Aniline Derivatives Can Be Activated by Freezing Their Aqueous Solutions Tvůrce(i) Corrochano, P. (CZ)
Nachtigallová, Dana (UOCHB-X) RID, ORCID
Klán, P. (CZ)Zdroj.dok. Environmental Science and Technology - ISSN 0013-936X
Roč. 51, č. 23 (2017), s. 13763-13770Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova air-ice interface ; experimental-computational approach ; dissolved organic matter Vědní obor RIV CF - Fyzikální chemie a teoretická chemie Obor OECD Physical chemistry CEP GA15-12386S GA ČR - Grantová agentura ČR Institucionální podpora UOCHB-X - RVO:61388963 UT WOS 000417549500026 EID SCOPUS 85038206874 DOI 10.1021/acs.est.7b04510 Anotace A combined experimental and computational approach was, used to investigate the spectroscopic properties of three different aniline derivatives (aniline, N,N-dimethylaniline, and N,N-diethylaniline) in aqueous solutions and at the air-ice interface in the temperature range of 243-298 K The absorption and diffuse reflectance spectra of ice samples prepared by different techniques, such as slow or shock freezing of the aqueous solutions or vapor deposition on ice grains, exhibited unequivocal bathochromic shifts of 10-15 nm of the absorption maxima of anilines in frozen samples compared to those in liquid aqueous solutions. DFT and SCS-ADC(2) calculations showed that contaminant contaminant and contaminant-ice interactions are responsible for these shifts. Finally, we demonstrate that irradiation of anilines in the presence of a hydrogen peroxide/O-2 system by wavelengths that overlap only with the red-shifted absorption tails of anilines in frozen samples (while having a marginal overlap with their spectra in liquid solutions) can almost exclusively trigger a photochemical oxidation process. Mechanistic and environmental considerations are discussed. Pracoviště Ústav organické chemie a biochemie Kontakt asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Jana Procházková, Tel.: 220 183 418 Rok sběru 2018
Počet záznamů: 1