Fast Molecular Compression by a Hyperthermal Collision Gives Bond-Selective Mechanochemistry

Krumbein, Lukas, Anggara, Kelvin, Stella, Martina , Michnowicz, Tomasz, Ochner, Hannah, Abb, Sabine, Rinke, Gordon, Portz, André, Dürr, Michael, Schlickum, Uta, Baldwin, Andrew, Floris, Andrea, Kern, Klaus and Rauschenbach, Stephan (2020) Fast Molecular Compression by a Hyperthermal Collision Gives Bond-Selective Mechanochemistry. Physical Review Letters . ISSN 0031-9007

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Fast Molecular Compression by a Hyperthermal Collision Gives Bond-Selective Mechanochemistry
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Abstract

Using electrospray ion beam deposition, we collide the complex molecule Reichardt’s Dye (C41H30NO+) at low, hyperthermal translational energy (2 - 50 eV) with a Cu(100) surface and image the outcome at single-molecule level by scanning tunneling microscopy. We observe bond-selective reaction induced by the translational kinetic energy. The collision impulse compresses the molecule and bends specific bonds, prompting them to react selectively. This dynamics drives the system to seek thermally inaccessible reactive pathways, since the compression timescale (sub-ps) is much shorter than the thermalization timescale (ns), thereby yielding reaction products that are unobtainable thermally.

Keywords:Mechanochemistry, Density functional theory, Hyperthermal Collision, electrospray ion beam deposition
Subjects:F Physical Sciences > F300 Physics
F Physical Sciences > F320 Chemical Physics
F Physical Sciences > F170 Physical Chemistry
F Physical Sciences > F343 Computational Physics
F Physical Sciences > F100 Chemistry
Divisions:College of Science > School of Chemistry
ID Code:43360
Deposited On:15 Dec 2020 11:43

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