Jump to main content
Jump to site search

Issue 39, 2017
Previous Article Next Article

Dynamics of π*-resonances in anionic clusters of para-toluquinone

Author affiliations

Abstract

Frequency-resolved photoelectron spectroscopy applied to mass-selected cluster anions is an insightful approach to characterise the dynamics of π*-resonances with microsolvation. Here, the technique is demonstrated with monomer, dimer and trimer radical anions of para-toluquinone (pTQ) over a ∼1 eV excitation window above the detachment threshold. The pTQ spectra show similar resonances and dynamics to para-benzoquinone, a prototype electrophore. The dimer, (pTQ)2, has a π-stacked geometry and shows a competition between photodissociation and prompt autodetachment. The trimer, (pTQ)3, also has a π-stacked cluster geometry and shows vibrational autodetachment from a non-valence state up to ∼0.7 eV above-threshold, outcompeting dissociation. At higher photoexcitation energies, (pTQ)3 shows monomer-like dynamics, blue-shifted in photoexcitation energy by the cluster cohesion energy. Overall, the study highlights the variety of non-adiabatic dynamics available to π*-resonances and the profound changes that occur through clusterization with one and two monomers.

Graphical abstract: Dynamics of π*-resonances in anionic clusters of para-toluquinone

Back to tab navigation

Supplementary files

Publication details

The article was received on 30 May 2017, accepted on 17 Sep 2017 and first published on 18 Sep 2017


Article type: Paper
DOI: 10.1039/C7CP03628K
Citation: Phys. Chem. Chem. Phys., 2017,19, 26589-26595
  •   Request permissions

    Dynamics of π*-resonances in anionic clusters of para-toluquinone

    J. N. Bull and J. R. R. Verlet, Phys. Chem. Chem. Phys., 2017, 19, 26589
    DOI: 10.1039/C7CP03628K

Search articles by author

Spotlight

Advertisements