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Medientyp:
E-Artikel
Titel:
Cooling, Spectroscopy and Non‐Sticking of trans‐Stilbene and Nile Red
Beteiligte:
Piskorski, Julia;
Patterson, David;
Eibenberger, Sandra;
Doyle, John M.
Erschienen:
Wiley, 2014
Erschienen in:ChemPhysChem
Sprache:
Englisch
DOI:
10.1002/cphc.201402502
ISSN:
1439-4235;
1439-7641
Entstehung:
Anmerkungen:
Beschreibung:
<jats:title>Abstract</jats:title><jats:p>We create and study <jats:italic>trans</jats:italic>‐Stilbene and Nile Red in a cryogenic (7 K) cell with a low density helium buffer gas. No molecule–helium cluster formation is observed, indicating limited atom–molecule sticking in this system. We place an upper limit of 5 % on the population of clustered He–<jats:italic>trans</jats:italic>‐Stilbene, consistent with a measured He–molecule collisional residence time of less than 1 μs. With its very low energy torsional modes, <jats:italic>trans</jats:italic>‐Stilbene is less rigid than any molecule previously buffer‐gas‐cooled into the Kelvin regime. We also report cooling and gas phase visible spectroscopy of Nile Red, a much larger molecule. Our data suggest that buffer gas cooling will be feasible for a variety of small biological molecules.</jats:p>