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Statements

Subject Item
n2:RIV%2F61388955%3A_____%2F07%3A00092666%21RIV08-AV0-61388955
rdf:type
skos:Concept n16:Vysledek
dcterms:description
V tomto článku jsou popsány experimenty s fotodisociací molekul HBr v prostředí různých klastrů. Fotolýza HBr v klastrech (HBr)n vázaných vodíkovými můstky vykazuje značný únik H-fragmentů. Naproti tomu H-fragmenty fotolýzy HBr vázané slabými vand der Waalsovskými interakcemi na Ar klastrech jsou efektivně zachyceny. Tyto efekty jsou vysvětlovány zejména geometrickým uspořádáním klastrů. HBr na velkých vodních klastrech vykazuje zcela odlišné chování. Dochází zde k acidické disociaci a vzniklá zwitterionická struktura je excitována a vznikne molekula hydronia H3O, která následně disociuje. Experiments on the photodissociation of molecules in different cluster environments are described and illustrated based on the example of HBr molecules photolysed at 193 nm in various clusters. The photolysis of HBr molecules incorporated in the hydrogen bonded network of (HBr)(n) clusters exhibits pronounced direct exits of the H-fragments. On the other hand, the H-fragments from HBr molecules bound by much weaker van der Waals forces at the surface of large Ar-n clusters are trapped efficiently by the cluster cage. These observations are mainly explained by the geometry of the molecule bound to the cluster. The HBr molecules deposited on the large (H2O) n clusters behave quite differently. They undergo acid dissociation and the resulting zwitterionic form is excited by the radiation giving rise to the generation of the hydronium H3O molecule and its subsequent dissociation. Experiments on the photodissociation of molecules in different cluster environments are described and illustrated based on the example of HBr molecules photolysed at 193 nm in various clusters. The photolysis of HBr molecules incorporated in the hydrogen bonded network of (HBr)(n) clusters exhibits pronounced direct exits of the H-fragments. On the other hand, the H-fragments from HBr molecules bound by much weaker van der Waals forces at the surface of large Ar-n clusters are trapped efficiently by the cluster cage. These observations are mainly explained by the geometry of the molecule bound to the cluster. The HBr molecules deposited on the large (H2O) n clusters behave quite differently. They undergo acid dissociation and the resulting zwitterionic form is excited by the radiation giving rise to the generation of the hydronium H3O molecule and its subsequent dissociation.
dcterms:title
Photodissociation of HBr molecules in clusters: from rare gas clusters to water nanoparticles Photodissociation of HBr molecules in clusters: from rare gas clusters to water nanoparticles Fotodisociace HBr molekul v klastrech: od klastrů vzácných plynů k nanočásticím vody
skos:prefLabel
Photodissociation of HBr molecules in clusters: from rare gas clusters to water nanoparticles Fotodisociace HBr molekul v klastrech: od klastrů vzácných plynů k nanočásticím vody Photodissociation of HBr molecules in clusters: from rare gas clusters to water nanoparticles
skos:notation
RIV/61388955:_____/07:00092666!RIV08-AV0-61388955
n4:strany
C73;C78
n4:aktivita
n9:Z n9:P
n4:aktivity
P(GA203/06/1290), P(KAN400400651), Z(AV0Z40400503)
n4:cisloPeriodika
3
n4:dodaniDat
n14:2008
n4:domaciTvurceVysledku
n17:1866877
n4:druhVysledku
n5:J
n4:duvernostUdaju
n7:S
n4:entitaPredkladatele
n15:predkladatel
n4:idSjednocenehoVysledku
441242
n4:idVysledku
RIV/61388955:_____/07:00092666
n4:jazykVysledku
n13:eng
n4:klicovaSlova
(HBR)(N) clusters; ice; photochemistry; distributions
n4:klicoveSlovo
n12:%28HBR%29%28N%29%20clusters n12:photochemistry n12:distributions n12:ice
n4:kodStatuVydavatele
SE - Švédské království
n4:kontrolniKodProRIV
[C047DF883F8A]
n4:nazevZdroje
Physica Scripta
n4:obor
n6:CF
n4:pocetDomacichTvurcuVysledku
1
n4:pocetTvurcuVysledku
2
n4:projekt
n8:GA203%2F06%2F1290 n8:KAN400400651
n4:rokUplatneniVysledku
n14:2007
n4:svazekPeriodika
76
n4:tvurceVysledku
Buck, U. Fárník, Michal
n4:zamer
n18:AV0Z40400503
s:issn
0031-8949
s:numberOfPages
6