Probing broad π-resonances of tetracenyl anion

Sagan, Cole R.

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https://hdl.handle.net/2142/107698 Copy

Description

Title

Probing broad π-resonances of tetracenyl anion

Author(s)

Sagan, Cole R.

Contributor(s)

Garand, Etienne

Issue Date

2020-06-26

Keyword(s)

• Electronic structure
• Potential energy surfaces

Abstract

Polyaromatic hydrocarbon (PAH) anions are proposed to be present in the interstellar medium. These molecules, which do not feature a large enough dipole moment to capture an electron via a dipole-bound state, are instead purported to capture electrons via broad $\pi$-resonances. These $\pi$-resonances are closely spaced anion excited electonic states. We use an action spectroscopy that monitors total photoelectron yield of these anions above detachment threshold. This investigates the many states present in the dense manifold of electronic states. With the resolution of our instrument, we are able to deconvolute these $\pi$-resonances. In addition, we report new electron affinity values for isomers of tetracenyl radical using high resolution photoelectron spectroscopy. One radical in particular, 9-tetracenyl, EA = 1.845eV, disagrees with the previous literature value, 2.6eV.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Permalink

http://hdl.handle.net/2142/107698

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Copyright 2020 is held by the Author(s)

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