Title

Ultrafast Electron Diffraction Imaging of Bond Breaking in Di-Ionized Acetylene

Abstract

Visualizing chemical reactions as they occur requires atomic spatial and femtosecond temporal resolution. Here, we report imaging of the molecular structure of acetylene (C₂H₂) 9 femtoseconds after ionization. Using mid-infrared laser-induced electron diffraction (LIED), we obtained snapshots as a proton departs the [C₂H₂]²⁺ ion. By introducing an additional laser field, we also demonstrate control over the ultrafast dissociation process and resolve different bond dynamics for molecules oriented parallel versus perpendicular to the LIED field. These measurements are in excellent agreement with a quantum chemical description of field-dressed molecular dynamics.

Department(s)

Physics

Keywords and Phrases

Acetylene Derivative; Di Ionized Acetylene; Proton; Unclassified Drug, Acetylene; Chemical Reaction; Diffraction; Electron; Ionization; Molecular Analysis; Quantum Mechanics; Spatial Resolution, Article; Chemical Bond; Chemical Structure; Dissociation; Electron Diffraction; Ionization; Molecular Imaging; Molecule; Priority Journal; Quantum Chemistry; Ultrafast Electron Diffraction Imaging

International Standard Serial Number (ISSN)

0036-8075

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2016 American Association for the Advancement of Science (AAAS), All rights reserved.

PubMed ID

27846561

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