FS-CFELCMI

 2018-11-1413:43 [PUBDB-2018-04495] Dissertation / PhD Thesis Küpper, J. Cold Beams of Large Molecules for Structural Dynamics Studies Hamburg 123 pp. (2018) = Dissertation, Universität Hamburg, 2018 Biomolecules and their reactions are of great interest because they are important for the functions in our body and thus for health. The structure of a molecule defines its function, and in this work we demonstrate the crucial steps that will allow direct recording of structural information from large biological molecules through gas-phase x-ray di↵raction. [...] Restricted: PDF; 2018-11-1314:50 [PUBDB-2018-04473] Report/Journal Article Küpper, J. Räumliche Trennung der Konformere eines Dipeptids [arXiv:1805.12396] Angewandte Chemie / International edition International edition 130(42), 13971 - 13975 (2018) [10.1002/ange.201807646]   Die Abbildung isolierter Moleküle mit atomarer Auflösung, z. B. in Experimenten zur kohärenten Röntgenbeugung an Freie‐Elektronen‐Lasern, benötigt Molekülstrahlen identischer Moleküle mit hoher Dichte [...] Fulltext: PNG; 2018-11-1214:15 [PUBDB-2018-04422] Journal Article et al Climbing the Rotational Ladder to Chirality Physical review letters 121(19), 193201 (2018) [10.1103/PhysRevLett.121.193201]   Molecular chirality is conventionally understood as space-inversion-symmetry breaking in the equilibrium structure of molecules. Less well known is that achiral molecules can be made chiral through extreme rotational excitation. [...] Fulltext: TeaserImage - GIF; chiral-PH3_suppmat - PDF PDF (PDFA); Restricted: PDF PDF (PDFA); External link: Fulltext 2018-11-0911:13 [PUBDB-2018-04356] Journal Article et al Note: Knife edge skimming for improved separation of molecular species by the deflector Review of scientific instruments 89(9), 096110 (2018) [10.1063/1.5026145]   A knife edge for shaping a molecular beam is described to improve the spatial separation of the species in a molecular beam by the electrostatic deflector. The spatial separation of different molecular species from each other as well as from atomic seed gas is improved. [...] Restricted: PDF PDF (PDFA); External link: Fulltext 2018-11-0613:41 [PUBDB-2018-04186] Report/Journal Article Küpper, J. Spatially Separating the Conformers of a Dipeptide [arXiv:1805.12396] Angewandte Chemie / International edition 57(42), 13775 - 13779 (2018) [10.1002/anie.201807646]   Atomic‐resolution‐imaging approaches for single molecules, such as coherent X‐ray diffraction at free‐electron lasers, require the delivery of high‐density beams of identical molecules. However, even very cold beams of biomolecules typically have multiple conformational states populated [...] Fulltext: PNG; 2018-08-2709:31 [PUBDB-2018-03175] Preprint/Report et al Impulsive laser-induced alignment of OCS molecules at FERMI [arXiv:1808.07281]   We demonstrate the experimental realization of impulsive alignment of carbonyl sulfide (OCS) molecules at the Low Density Matter Beamline (LDM) at the free-electron laser FERMI. OCS molecules in a molecular beam were impulsively aligned using 200 fs pulses from a near-infrared laser. [...] OpenAccess: PDF PDF (PDFA); 2018-08-2709:20 [PUBDB-2018-03174] Journal Article et al Energy dependent parity-pair behavior in NO + He collisions The journal of chemical physics 149(8), 084306 (2018) [10.1063/1.5042074]   Colliding molecules behave fundamentally differently at high and low collision energies. At high energies, a collision can be described to a large extent using classical mechanics, and the scattering process can be compared to a billiard-ball-like collision. [...] Fulltext: PDF PDF (PDFA); Restricted: 1.5042074 - PDF PDF (PDFA); Accepted manuscript - PDF PDF (PDFA); 2018-08-2414:15 [PUBDB-2018-03160] Conference Presentation (Invited) Küpper, J. Controlled molecules and chemical dynamics in the molecular frame 256th ACS National Meeting – Symposium 'Ultrafast Molecular Sviences by Femtosecond Photons&Electrons: Symposium in Honor of Ahmed Zewail', BostonBoston, MA, USA, 19 Aug 2018 - 23 Aug 2018 Based on the visionary experiments in femtochemistry and ultrafast electron diffraction many details of the elementary steps of chemical reactions could be unraveled [1]. However, thermal averaging over different molecular species and the isotropic directionality of molecules, even in cold molecular beams, limits the information that can be extracted from such experiments.Here, I will report on our endeavors to unravel the molecular structures and chemical dynamics of well-defined single molecular species and directly in the molecular frame [...] External link: Fulltext 2018-08-1411:14 [PUBDB-2018-02944] Conference Presentation Küpper, J. Observation of different reactivities of para- and ortho-water towards cold diazenylium $\mathrm{(N_{2}H^{+})}$ ions General Assembly of the German Bunsen Society for Physical Chemistry, Bunsentagung 2018, HannoverHannover, Germany, 10 May 2018 - 12 May 2018 External link: Fulltext 2018-07-2416:55 [PUBDB-2018-02671] Conference Presentation (Invited) Horke, D. COMOTION - Controlling the motion of large molecules and particles 9th Conference on isolated Biomolecules and Biomolecular Interactions, IBBI, Oxford UniversityOxford, Oxford University, United Kingdom, 10 Apr 2016 - 15 Apr 2016