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Photochemistry in clusters and nanoparticles: Systems of atmospheric and biological importance

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    0092702 - ÚFCH JH 2008 RIV CZ eng C - Conference Paper (international conference)
    Fárník, Michal
    Photochemistry in clusters and nanoparticles: Systems of atmospheric and biological importance.
    [Fotochemie v klastrech a nanočásticích: systémy relevantní v atmosférické chemii a v biologii.]
    WDS´07 Proceedings of contributed papers. Praha: MATFYZPRESS UK, 2007 - (Šafránková, J.; Pavlů, J.), s. 69-77. ISBN 978-80-7378-025-8.
    [Annual Conference of Doctoral Students - WDS 2007 /16./. Prague (CZ), 05.06.2007-08.06.2007]
    R&D Projects: GA AV ČR KAN400400651; GA ČR GA203/06/1290
    Institutional research plan: CEZ:AV0Z40400503
    Keywords : cluster photochemistry * nanoparticles * atmospheric chemistry
    Subject RIV: CF - Physical ; Theoretical Chemistry

    Influence of solvation on photodissociation of molecules is investigated in clusters produced in a molecular beam experiment. Photochemistry in three different systems is compared: (i) HBrArn and (HBr)n clusters, where the fragment does not react with the solvent and an effect of the fragment caging is observed, (ii) HBr(H2O)n system where chemical reaction occurs and a reaction channel is closed by the electronic interaction with the solvent. The practical relevance of the studied processes ranges from atmospheric chemistry to biology.

    Vliv solvatace na fotolýzu molekul je studován v klastrech v experimentech s molekulovými paprsky. Fotochemie tří různých systému je porovnávána: (i) HBrArn a (HBr)n klastry, kde fragmenty nereagují s klastrem a záchyt fragmentu je pozorován, (ii) HBr(H2O)n systém, kde dochází k chemickým reakcím a solvatací se otevírají nové reakční kanály, (iii) (Py)n klastry, kde dochází elektronickou interakcí se solventem k uzavření reakčního kanálu. Tyto studie mají praktickou relevanci v nejrůznějších oborech od chemie atmosféry po biologii.
    Permanent Link: http://hdl.handle.net/11104/0152953

     
     
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