Probing the structures of neutral B11 and B12 using high-resolution photoelectron imaging of B11− and B12−

Cheung, Ling Fung

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https://hdl.handle.net/2142/97142 Copy

Description

Title

Probing the structures of neutral B11 and B12 using high-resolution photoelectron imaging of B11− and B12−

Author(s)

Cheung, Ling Fung

Contributor(s)

• Wang, Lai-Sheng
• Czekner, Joseph

Issue Date

2017-06-20

Keyword(s)

Multiple potential energy surfaces

Date of Ingest

• 2017-07-27T20:15:51Z
• 2018-01-29T23:06:23Z

Abstract

We report high-resolution photoelectron imaging of B$_{11}$$^-$ and B$_{12}$$^-$ at 354.7 and 532.0 nm, respectively, resolving several low-frequency vibrational modes for neutral B$_{11}$ and B$_{12}$. The vibrational information is highly valuable to verify the structures of the neutral clusters. Several isomers are considered, and vibrational frequencies are calculated for B$_{11}$ and B$_{12}$ using density functional theory. Comparisons between the experimental and calculated vibrational frequencies prove that the B$_{11}$ neutral and anion both possess a perfectly planar C$_{2v}$ structure. The B$_{12}$$^-$ anion is quasi-planar with C$_s$ symmetry, while the experiment confirms that neutral B$_{12}$ possesses C$_{3v}$ symmetry. The high-resolution photoelectron spectra also allow the electron affinities of B$_{11}$ and B$_{12}$ to be measured more accurately as 3.401 and 2.221 eV, respectively. It is shown that high-resolution photoelectron imaging can be an effective method to determine structures of small neutral boron clusters, complementary to infrared spectroscopy.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Genre of Resource

Conference Paper / Presentation

Language

eng

Permalink

http://hdl.handle.net/2142/97142

DOI

https://doi.org/10.15278/isms.2017.TB06

Copyright and License Information

Copyright 2017 Ling Fung Cheung

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