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dc.creatorLetzner, M.en_US
dc.creatorGrun, S. A.en_US
dc.creatorSchwaab, G.en_US
dc.creatorHavenith, M.en_US
dc.date.accessioned2011-07-12T17:38:43Z
dc.date.available2011-07-12T17:38:43Z
dc.date.issued2011en_US
dc.identifier2011-FE-08en_US
dc.identifier.urihttp://hdl.handle.net/1811/49638
dc.descriptionAuthor Institution: Department of Physical Chemistry II, Ruhr-University Bochum, D-44780 Bochum, Germanyen_US
dc.description.abstractGlycine is the smallest amino acid, and therefore it is of special interest as a model and starting point for theoretical and experimental studies. Whereas the crystalline form of glycine consists of zwitterions $NH_3^{+}-CH_2-COO^{-}$, gas phase glycine is known to exist in the nonionized form $NH_2-CH_2-COOH$ . The interaction between glycine and water has been widely studied using a large variety of theoretical methods. Depending on the theoretical level used, a stabilisation of the zwitterionic form is predicted for complexes containing from 2 to 7 water molecules. In low-temperature Ar matrices a set of characteristic IR absorption bands for the zwitterionic form has been observed. The higher stoichiometry complexes (glycine)$\cdots$$(H_2O)_n$ with n larger than 3 are demonstrated to be zwitterionic H-bonded complexes . The multitude of conformations expected for these glycine-water complexes makes a combination of low temperature and high resolution spectroscopy essential. We want to use the advantages of our experiment to investigate glycine and its complexes with water in helium-nanodroplets at ultracold temperatures in the range from 3000-3800 $cm^{-1}$. Our measurements were carried out using a high power IR-OPO (cw: 2.7 W) as radiation source and a helium nanodroplet spectrometer. Helium-nanodroplets are formed by expansion of helium at 55 bar through a 5 $\mu$m nozzle which is kept at a temperature of 16 K. The status of the project is presented.en_US
dc.language.isoenen_US
dc.publisherOhio State Universityen_US
dc.titleIR-SPECTROSCOPY OF GLYCINE AND ITS COMPLEXES WITH WATER IN HELIUM NANODROPLETSen_US
dc.typeArticleen_US


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