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Recent Studies from Institute of Chemical Technology Add New Data to Photochemistry (Clustering and Photochemistry of Freon CF2Cl2 on Argon and Ice...

August 15, 2014

Recent Studies from Institute of Chemical Technology Add New Data to Photochemistry (Clustering and Photochemistry of Freon CF2Cl2 on Argon and Ice Nanoparticles)

By a News Reporter-Staff News Editor at Health & Medicine Week -- Researchers detail new data in Photochemistry. According to news reporting out of Prague, Czech Republic, by NewsRx editors, research stated, "The photochemistry of CF2Cl2 molecules deposited on argon and ice nanoparticles was investigated. The clusters were characterized via electron ionization mass spectrometry, and the photochemistry was revealed by the Cl fragment velocity map imaging after the CF2Cl2 photodissociation at 193 mu."

Our news journalists obtained a quote from the research from the Institute of Chemical Technology, "The complex molecular beam experiment was complemented by ab initio calculations. The (CF2Cl2)(n) clusters were generated in a coexpansion with Ar buffer gas. The photodissociation of molecules in the (CF2Cl2)(n) clusters yields predominantly Cl fragments with zero kinetic energy: caging. The CF2Cl2 molecules deposited on large argon clusters in a pickup experiment are highly mobile and coagulate to form the (CF2Cl2)(n) clusters on Ar-N. The photodissociation of the CF2Cl2 molecules and clusters on Ar-N leads to the caging of the Cl fragment. On the other hand, the CF2Cl2 molecules adsorbed on the (H2O)(N) ice nanoparticles do not form clusters, and no Cl fragments are observed from their photodissociation."

According to the news editors, the research concluded: "Since the CF2Cl2 molecule was clearly adsorbed on (H2O)(N), the missing Cl signal is interpreted in terms of surface orientation, possibly via the so-called halogen bond and/or embedding of the CF2Cl2 molecule on the disordered surface of the ice nanopartides."

For more information on this research see: Clustering and Photochemistry of Freon CF2Cl2 on Argon and Ice Nanoparticles. Journal of Physical Chemistry A, 2014;118(26):4740-4749. Journal of Physical Chemistry A can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society -; Journal of Physical Chemistry A -

Our news journalists report that additional information may be obtained by contacting V. Poterya, Prague Inst Chem Technol, Dept. of Phys Chem, CR-16628 Prague 6, Czech Republic. Additional authors for this research include J. Kocisek, J. Lengyel, P. Svrckova, A. Pysanenko, D. Hollas, P. Slavicek and M. Farnik (see also Photochemistry).

Keywords for this news article include: Argon, Prague, Europe, Chemicals, Nanoparticle, Czech Republic, Nanotechnology, Photochemistry, Emerging Technologies

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Source: Health & Medicine Week

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