About: Photodecarbonylation of Dibenzyl Ketones and Trapping of Radical Intermediates by Copper(II) Chloride in Frozen Aqueous Solutions

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About: Photodecarbonylation of Dibenzyl Ketones and Trapping of Radical Intermediates by Copper(II) Chloride in Frozen Aqueous Solutions Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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 a broad 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 boundaries of 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 radicals within 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). 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 a broad 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 boundaries of 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 radicals within 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). (en)
Title	Photodecarbonylation of Dibenzyl Ketones and Trapping of Radical Intermediates by Copper(II) Chloride in Frozen Aqueous Solutions Photodecarbonylation of Dibenzyl Ketones and Trapping of Radical Intermediates by Copper(II) Chloride in Frozen Aqueous Solutions (en)
skos:prefLabel	Photodecarbonylation of Dibenzyl Ketones and Trapping of Radical Intermediates by Copper(II) Chloride in Frozen Aqueous Solutions Photodecarbonylation of Dibenzyl Ketones and Trapping of Radical Intermediates by Copper(II) Chloride in Frozen Aqueous Solutions (en)
skos:notation	RIV/00216224:14310/05:00012596!RIV10-MZP-14310___
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA205/05/0819), P(SB/660/01/03), Z(MSM0021622412)
http://linked.open...iv/cisloPeriodika	19
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Klán, Petr
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Masarykova univerzita / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	535925
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/05:00012596
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	photochemistry; ice; debenzyl ketone (en)
http://linked.open.../riv/klicoveSlovo	photochemistry ice debenzyl ketone
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[63286D674318]
http://linked.open...i/riv/nazevZdroje	Journal of Physical Chemistry B
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Geological Research of Antarctica Environmental consequences of photochemical processes in ice and snow
http://linked.open...UplatneniVysledku	2005
http://linked.open...v/svazekPeriodika	109
http://linked.open...iv/tvurceVysledku	Klán, Petr Růžička, Radovan Baráková, Lenka
http://linked.open...ain/vavai/riv/wos	000229134000024
http://linked.open...n/vavai/riv/zamer	Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)
issn	1089-5639
number of pages	8 (xsd:int)
http://localhost/t...ganizacniJednotka	14310

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