Gas-phase formation of large neutral alkaline-earth metal tryptophan complexes
Gas-phase formation of large neutral alkaline-earth metal tryptophan complexes
We report on the first observation of isolated large neutral metal amino acid complexes such as TrpnMek, with Me = Ca, Ba, Sr, cluster combinations covering n=1…33, k=0..2 and masses beyond 6500 u. The cluster beam is generated using UV laser desorption from a mixed powder of alkaline-earth metal salts and tryptophan inside a cluster mixing channel. The particles are detected using VUV photoionization followed by time-of-flight mass spectroscopy. The enhanced stability of metal amino acid clusters over pure amino acid clusters is substantiated in molecular dynamics simulations by determining the gain in binding energy related to the inclusion of the metal atoms
1021-1026
Marksteiner, Markus
10af17a8-1106-4e12-ba09-361529e673ae
Haslinger, Philipp
6a68010c-fe9f-497d-8279-5abbfb6af1aa
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d
Sclafani, Michele
7f2b276c-2a26-4085-ac77-21f2982325fb
Oberhofer, Harald
e6b73c0c-95e7-4d43-ad7c-1ca9ada10d93
Dellago, Christoph
1837454f-6e53-4da6-a9e3-824e266e9628
Arndt, Markus
5979dced-ae4f-4dce-8480-71fc8b6dee88
July 2008
Marksteiner, Markus
10af17a8-1106-4e12-ba09-361529e673ae
Haslinger, Philipp
6a68010c-fe9f-497d-8279-5abbfb6af1aa
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d
Sclafani, Michele
7f2b276c-2a26-4085-ac77-21f2982325fb
Oberhofer, Harald
e6b73c0c-95e7-4d43-ad7c-1ca9ada10d93
Dellago, Christoph
1837454f-6e53-4da6-a9e3-824e266e9628
Arndt, Markus
5979dced-ae4f-4dce-8480-71fc8b6dee88
Marksteiner, Markus, Haslinger, Philipp, Ulbricht, Hendrik, Sclafani, Michele, Oberhofer, Harald, Dellago, Christoph and Arndt, Markus
(2008)
Gas-phase formation of large neutral alkaline-earth metal tryptophan complexes.
Journal of the American Society for Mass Spectrometry, 19 (7), .
(doi:10.1016/j.jasms.2008.04.028).
Abstract
We report on the first observation of isolated large neutral metal amino acid complexes such as TrpnMek, with Me = Ca, Ba, Sr, cluster combinations covering n=1…33, k=0..2 and masses beyond 6500 u. The cluster beam is generated using UV laser desorption from a mixed powder of alkaline-earth metal salts and tryptophan inside a cluster mixing channel. The particles are detected using VUV photoionization followed by time-of-flight mass spectroscopy. The enhanced stability of metal amino acid clusters over pure amino acid clusters is substantiated in molecular dynamics simulations by determining the gain in binding energy related to the inclusion of the metal atoms
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Published date: July 2008
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Local EPrints ID: 144281
URI: http://eprints.soton.ac.uk/id/eprint/144281
ISSN: 1044-0305
PURE UUID: 250ff0d4-5efd-4fc7-9350-4fce6b9b6a9c
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Date deposited: 14 Apr 2010 08:13
Last modified: 14 Mar 2024 02:54
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Author:
Markus Marksteiner
Author:
Philipp Haslinger
Author:
Michele Sclafani
Author:
Harald Oberhofer
Author:
Christoph Dellago
Author:
Markus Arndt
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