Vancea2019_Article_EnergyAndElectronTransferReact.pdf (2.4 MB)
Download fileEnergy and electron transfer reactions on silica gel and titania-silica mixed oxide surfaces
journal contribution
posted on 2019-03-28, 14:33 authored by Anisoara Vancea, Iain Kirkpatrick, David Worrall, Sian L. WilliamsThe energy and electron transfer reactions of anthracene co-adsorbed with an electron donor on silica gel and titania-silica mixed oxides have been studied by a combination of steady state reflectance, emission spectroscopy, and nanosecond diffuse reflectance laser flash photolysis. Bimolecular rate constants for energy and electron transfer between anthracene and azulene have been measured; kinetic analysis of the decay of the anthracene triplet state and radical cation show that the kinetic parameters depend on the titania content of the sample and the azulene loading. The rate of energy and electron transfer reactions increases as a function of azulene loading and decreases with increasing titania content in titania-silica mixed oxides. These findings indicate that the observed rate of reaction is determined by the rate of diffusion of anthracene on the titania-silica surfaces whereas, in contrast, the observed rate of reaction on silica gel is predominantly governed by the rate of diffusion of azulene.
Funding
The authors would like to thank EPSRC for funding this project.
History
School
- Science
Department
- Chemistry
Published in
Research on Chemical IntermediatesVolume
45Issue
8Pages
4205 - 4223Citation
VANCEA, A. ... et al., 2019. Energy and electron transfer reactions on silica gel and titania-silica mixed oxide surfaces. Research on Chemical Intermediates, 45 (8), pp.4205-4223.Publisher
Springer VerlagVersion
- VoR (Version of Record)
Rights holder
© The AuthorsPublisher statement
This work is made available according to the conditions of the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/Acceptance date
2019-03-19Publication date
2019-07-02Copyright date
2019ISSN
0922-6168eISSN
1568-5675Language
- en