Gas-Phase Formation of Large Neutral Alkaline-Earth Metal Tryptophan Complexes

Autor(en)

Markus Marksteiner, Philipp Haslinger, Hendrik Ulbricht, Michele Sclafani, Harald Oberhofer, Christoph Dellago, Markus Arndt

Abstrakt

We report on the first observation of isolated large neutral metal amino acid complexes such as Trp n Me k , 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.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation, Computergestützte Physik und Physik der Weichen Materie, Institut für Lehrer*innenbildung

Journal

Journal of the American Society for Mass Spectrometry

Band

19

Seiten

1021-1026

Anzahl der Seiten

6

ISSN

1044-0305

DOI

https://doi.org/10.1016/j.jasms.2008.04.028

Publikationsdatum

2008

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/7caed8bb-b6d3-4d58-8c49-258db44744f3