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Energy and electron transfer reactions on silica gel and titania-silica mixed oxide surfaces

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posted on 28.03.2019 by Anisoara Vancea, Iain Kirkpatrick, David Worrall, Sian L. Williams
The 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 Intermediates

Volume

45

Issue

8

Pages

4205 - 4223

Citation

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 Verlag

Version

VoR (Version of Record)

Rights holder

© The Authors

Publisher 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

19/03/2019

Publication date

2019-07-02

Copyright date

2019

ISSN

0922-6168

eISSN

1568-5675

Language

en

Licence

Exports

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Exports