Photodecarbonylation of Dibenzyl Ketones and Trapping of Radical Intermediates by Copper(II) Chloride in Frozen Aqueous Solutions
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F05%3A00012596" target="_blank" >RIV/00216224:14310/05:00012596 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Photodecarbonylation of Dibenzyl Ketones and Trapping of Radical Intermediates by Copper(II) Chloride in Frozen Aqueous Solutions
Original language description
This paper presents a quantitative and qualitative study of the Norrish type I reaction of dibenzyl ketone(DBK) and 4-methyldibenzyl ketone (MeDBK), producing the benzyl radicals and consequently recombination products, in frozen aqueous solutions over abroad temperature range (-80 to 20 oC). This work extends previous research on the cage effects in various constrained media to provide information about the dynamics and reactivity of the photochemically generated intermediates at the grain boundariesof ice matrix. As the temperature of aqueous solutions decreases, the solute concentrations become high at layers covering ice crystals, causing efficient molecular segregation. The cage effect experiments have shown that diffusion of the benzyl radicalswithin such reaction aggregates is still remarkably efficient at temperatures below -50 oC, independently of the initial ketone concentration in the range of 10(-6)to -10(-4) mol L(-1). In addition, the study of trapping the benzyl radic
Czech name
Photodecarbonylation of Dibenzyl Ketones and Trapping of Radical Intermediates by Copper(II) Chloride in Frozen Aqueous Solutions
Czech description
This paper presents a quantitative and qualitative study of the Norrish type I reaction of dibenzyl ketone(DBK) and 4-methyldibenzyl ketone (MeDBK), producing the benzyl radicals and consequently recombination products, in frozen aqueous solutions over abroad temperature range (-80 to 20 oC). This work extends previous research on the cage effects in various constrained media to provide information about the dynamics and reactivity of the photochemically generated intermediates at the grain boundariesof ice matrix. As the temperature of aqueous solutions decreases, the solute concentrations become high at layers covering ice crystals, causing efficient molecular segregation. The cage effect experiments have shown that diffusion of the benzyl radicalswithin such reaction aggregates is still remarkably efficient at temperatures below -50 oC, independently of the initial ketone concentration in the range of 10(-6)to -10(-4) mol L(-1). In addition, the study of trapping the benzyl radic
Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2005
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Physical Chemistry B
ISSN
1089-5639
e-ISSN
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Volume of the periodical
109
Issue of the periodical within the volume
19
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
9346-9353
UT code for WoS article
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EID of the result in the Scopus database
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