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A SELECTOR FOR STRUCTURAL ISOMERS OF NEUTRAL MOLECULES

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/33242

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Title: A SELECTOR FOR STRUCTURAL ISOMERS OF NEUTRAL MOLECULES
Creators: Filsinger, Frank; Erlekam, Undine; Von Helden, Gert; Kupper, Jochen; Meijer, Gerard
Issue Date: 2008
Abstract: 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, 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. Many techniques have been developed for the manipulation of small molecules in low-field-seeking quantum states. However, application of these techniques to large molecules is not straightforward, because, for larger molecules, all states are high-field seeking at the relevant electric field strengths. To manipulate the motion of large molecules one has to use alternating gradient (dynamic) focusing} \textbf{39} (2006), R263}. This method has been successfully demonstrated in the alternating gradient deceleration of benzonitrile} }, CO} \textbf{88} (2002), 133003 } and YbF} \textbf{92} (2004), 173002 }. Using the same alternating gradient focusing principle, applying switched electric fields in a quadrupole guide, we have set up a new experiment to spatially separate individual conformers of large molecules. This experiment exploits the different mass-to-dipole (m/$\mu$) ratios, similar to a quadrupole mass-to-charge (m/q) filter for ions. In a proof-of-principle experiment, we have demonstrated the conformer selection of cis- and trans-3-aminophenol}, preprint available at: arXiv:0802.2795v1}.
URI: http://hdl.handle.net/1811/33242
Other Identifiers: 2008-TG-04
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