About: Photodissociation of HBr molecules in clusters: from rare gas clusters to water nanoparticles

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Description	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. (en) 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. (cs)
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 (en) Fotodisociace HBr molekul v klastrech: od klastrů vzácných plynů k nanočásticím vody (cs)
skos:prefLabel	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 (en) Fotodisociace HBr molekul v klastrech: od klastrů vzácných plynů k nanočásticím vody (cs)
skos:notation	RIV/61388955:_____/07:00092666!RIV08-AV0-61388955
http://linked.open.../vavai/riv/strany	C73;C78
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA203/06/1290), P(KAN400400651), Z(AV0Z40400503)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2008
http://linked.open...aciTvurceVysledku	Fárník, Michal
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	Ústav fyzikální chemie J. Heyrovského AV ČR, v.v.i.
http://linked.open...dnocenehoVysledku	441242
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/07:00092666
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	(HBR)(N) clusters; ice; photochemistry; distributions (en)
http://linked.open.../riv/klicoveSlovo	photochemistry distributions ice (HBR)(N) clusters
http://linked.open...odStatuVydavatele	SE - Švédské království
http://linked.open...ontrolniKodProRIV	[C047DF883F8A]
http://linked.open...i/riv/nazevZdroje	Physica Scripta
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Novel rare-gas molecules in the gas phase Experimentální a teoretické studium volných nanočástic: %22létající nanoreaktory%22 pro výzkum procesů na molekulární úrovni
http://linked.open...UplatneniVysledku	2007
http://linked.open...v/svazekPeriodika	76
http://linked.open...iv/tvurceVysledku	Fárník, Michal Buck, U.
http://linked.open...n/vavai/riv/zamer	Struktura, reaktivita a dynamika molekulárních a biomolekulárních systémů: teorie, experiment, aplikace
issn	0031-8949
number of pages	6 (xsd:int)

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