Hamburg 2009 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 10: Kalte Moleküle 1
MO 10.6: Vortrag
Dienstag, 3. März 2009, 12:00–12:15, VMP 6 HS-G
Spatially separating individual conformers of neutral molecules — •Frank Filsinger1, Jochen Küpper1, Gerard Meijer1, Jonas L. Hansen2, Jens H. Nielsen2, Lotte Holmegaard2, Iftach Nevo2, Jochen Maurer2, and Henrik Stapelfeldt2 — 1Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany — 2Århus University, Århus, Denmark
Large (bio)molecules exhibit multiple conformers (structural isomers), even under the cold conditions present in a supersonic jet. For various applications, i. e., scattering experiments or time resolved studies, it would be highly desirable to prepare molecular packets of individual conformers.
It is well known that polar molecules can be manipulated using strong electric fields. Recently, we have demonstrated that electrostatic deflection of a molecular beam can be used for quantum-state selection of large molecules [1]. Here we demonstrate how this quantum state selectivity can be exploited to spatially separate the individual conformers of large molecules based on their distinct mass-to-dipole (m/µ) ratios. In a proof-of-principle experiment, we have spatially isolated both, cis and trans, conformers of 3-aminophenol. We will compare this approach to conformer selection using alternating gradient (dynamic) focusing in an m/µ-selector [2].
[1] L. Holmegaard et al., Phys. Rev. Lett., in press, preprint available at arXiv:physics.chem-ph 0810:2307 (2008)
[2] F. Filsinger et al., Phys. Rev. Lett. 100, (2008),133003