Work

A multiphoton ionisation photoelectron imaging \nstudy of thiophene

Year: 2024

Type: article

Abstract: Thiophene is a prototype for the excited state photophysics that lies at the heart of many technologies within the field of organic electronics. Here, we report a multiphoton ionisation photoelectron imaging study of gas-phase thiophene using a range of photon energies to excite transitions from the ground electronic state to the first two electronically excited singlet states, from the onset of absorption to the absorption maximum. Analysis of the photoelectron spectra and angular distributions reveal features arising from direct photoionisation from the ground electronic state, and resonance-enhanced photoionisation via the electronically excited singlet states. The first two ionisation energies from the ground electronic state were confirmed to be 8.8 eV (adiabatic) and 9.6 eV (vertical). The ionisation energies from the first two electronically excited singlet states were found to be 3.7 eV (adiabatic) and 4.4 eV (vertical).

Source: UCL Discovery (University College London)

Authors: Broughton, Joseph J, Patra, Sarbani, Parkes, Michael A, Worth, Graham A, Fielding, Helen H

Institution: University College London

Language: English

Topic: Atomic and Molecular Physics

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Engineering and Physical Sciences Research Council

Awards: EPSRC Centre for Doctoral Training in Molecular Modelling and Materials Science, Ultrafast Photochemical Dynamics in Complex Environments, Ultrafast Laser Spectroscopy with Photons from the IR to the VUV

OpenAlex ID: W7021007138