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Related Experiment Video

Updated: Jun 13, 2025

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F⁻

Published on: July 27, 2018

SF₆ Negative Ion Formation in Charge Transfer Experiments.

Sarvesh Kumar^1,2, Masamitsu Hoshino³, Boutheïna Kerkeni^4,5

¹Atomic and Molecular Collisions Laboratory, CEFITEC-Centre of Physics and Technological Research, Department of Physics, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal.

Molecules (Basel, Switzerland)

|September 14, 2024

Summary

This summary is machine-generated.

Potassium collisions with sulfur hexafluoride (SF6) produce fragment anions, predominantly SF5-. This study updates previous findings with new data on anion formation and electronic states.

Keywords:

anion formation charge transfer energy loss mass spectrometry sulphur hexafluoride

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Area of Science:

Physical Chemistry
Chemical Physics
Atomic and Molecular Collisions

Background:

Extends previous ion-pair formation studies on K + SF6 collisions.
Addresses the complex intramolecular energy redistribution in temporary negative ions.

Purpose of the Study:

To update and extend previous ion-pair formation studies of K + SF6 collisions.
To investigate fragment anion formation and energy loss spectra.
To support experimental findings with quantum chemical calculations.

Main Methods:

Time-of-flight mass spectrometry to detect fragment anions.
Collisions conducted over a wide energy range (10.7–213.1 eV).
Quantum chemical calculations for unoccupied molecular orbitals.

Main Results:

SF5- is the dominant anion (>70% yield), followed by SF6- and F-.
Minor anions include SF3- and F2-, with trace S-.
Energy loss spectrum of potassium cations provides insights into collision dynamics.

Conclusions:

Experimental and theoretical results elucidate the mechanisms of anion formation in K + SF6 collisions.
The role of resonances and Rydberg states in anion formation is highlighted.
Provides a comprehensive understanding of the collision dynamics and fragmentation pathways.