Next Article in Journal
Synthesis, Antifungal Activity and QSAR of Some Novel Carboxylic Acid Amides
Previous Article in Journal
Theoretical and Experimental Electrostatic Potential around the m-Nitrophenol Molecule
Previous Article in Special Issue
The Games Radicals Play: Special Issue on Free Radicals and Radical Ions
Article Menu

Export Article

Open AccessArticle
Molecules 2015, 20(3), 4055-4070;

In Situ EPR Studies of Reaction Pathways in Titania Photocatalyst-Promoted Alkylation of Alkenes

Chemistry Department, University of Aberdeen, Aberdeen AB24 3UE, UK
Author to whom correspondence should be addressed.
Academic Editors: John Walton and Ffrancon Williams
Received: 15 January 2015 / Revised: 17 February 2015 / Accepted: 26 February 2015 / Published: 3 March 2015
(This article belongs to the Special Issue Free Radicals and Radical Ions)
Full-Text   |   PDF [826 KB, uploaded 3 March 2015]   |  


In situ EPR spectroscopy at cryogenic temperatures has been used to observe and identify paramagnetic species produced when titania is irradiated in the presence of reactants used in the photocatalytic alkylation of maleimide with t-butyl carboxylic acid or phenoxyacetic acid. It is shown that maleimide acts as an acceptor of conduction band electrons. Valence band holes oxidise t-butyl carboxylic acid to the t-butyl radical and phenoxyacetic acid to the phenoxyacetic acid radical cation. In the presence of maleimide, the phenoxymethyl radical is formed from phenoxyacetic acid. The relevance of these observations to the mechanisms of titania photocatalyst-promoted alkylation of alkenes is discussed. View Full-Text
Keywords: EPR spectroscopy; titania; photocatalysis; alkene alkylation EPR spectroscopy; titania; photocatalysis; alkene alkylation

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Rhydderch, S.; Howe, R.F. In Situ EPR Studies of Reaction Pathways in Titania Photocatalyst-Promoted Alkylation of Alkenes. Molecules 2015, 20, 4055-4070.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Molecules EISSN 1420-3049 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top