title: Spectroscopy of 3, 4, 9, 10-perylenetetracarboxylic dianhydride (PTCDA) attached to rare gas samples: clusters vs. bulk matrices. I. Absorption spectroscopy.
abstract: The interaction between 3, 4, 9, 10-perylenetetracarboxylic dianhydride (PTCDA) and rare gas or para-hydrogen samples is studied by means of laser-induced fluorescence excitation spectroscopy. The comparison between spectra of PTCDA embedded in a neon matrix and spectra attached to large neon clusters shows that these large organic molecules reside on the surface of the clusters when doped by the pick-up technique. PTCDA molecules can adopt different conformations when attached to argon, neon, and para-hydrogen clusters which implies that the surface of such clusters has a well-defined structure without liquid or fluxional properties. Moreover, a precise analysis of the doping process of these clusters reveals that the mobility of large molecules on the cluster surface is quenched, preventing agglomeration and complex formation.
authors.affiliation: Physikalisches Institut, Universität Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany.
authors.forename: Matthieu
authors.initials: M
authors.lastname: Dvorak
authors.forename: Markus
authors.initials: M
authors.lastname: Müller
authors.forename: Tobias
authors.initials: T
authors.lastname: Knoblauch
authors.forename: Oliver
authors.initials: O
authors.lastname: Bünermann
authors.forename: Alexandre
authors.initials: A
authors.lastname: Rydlo
authors.forename: Stefan
authors.initials: S
authors.lastname: Minniberger
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Harbich
authors.forename: Frank
authors.initials: F
authors.lastname: Stienkemeier