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|Title:||Electron attachment to amino acid clusters in helium nanodroplets: Glycine, alanine, and serine|
|Authors:||da Silva, F. Ferreira|
Ellis, Andrew M.
|Publisher:||American Institute of Physics (AIP)|
|Citation:||Journal of Chemical Physics, 2010, 132 (21), pp. 4306-4311 (6)|
|Abstract:||The first detailed study of electron attachment to amino acid clusters is reported. The amino acids chosen for investigation were glycine, alanine, and serine. Clusters of these amino acids were formed inside helium nanodroplets, which provide a convenient low temperature (0.37 K) environment for growing noncovalent clusters. When subjected to low energy (2 eV) electron impact the chemistry for glycine and alanine clusters was found to be similar. In both cases, parent cluster anions were the major products, which contrasts with the corresponding monomers in the gas phase, where the dehydrogenated products ([AA(n)-H](-), where AA=amino acid monomer) dominate. Serine clusters are different, with the major product being the parent anion minus an OH group, an outcome presumably conferred by the facile loss of an OH group from the beta carbon of serine. In addition to the bare parent anions and various fragment anions, helium atoms are also observed attached to both the parent anion clusters and the dehydrogenated parent anion clusters. Finally, we present the first anion yield spectra of amino acid clusters from doped helium nanodroplets as a function of incident electron energy.|
|Rights:||Copyright © 2010 American Institute of Physics. Deposited with reference to the publisher's archiving policy available on the SHERPA/RoMEO website. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Journal of Chemical Physics, 2010, 132 (21), pp. 4306-4311 and may be found at http://jcp.aip.org/resource/1/jcpsa6/v132/i21/p214306_s1|
|Appears in Collections:||Published Articles, Dept. of Chemistry|
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