Bonding of Methyl Phosphonate to TiO2(110)

Pang, C L, Watkins, M, Cabailh, G, Ferrero, S, Ngo, L T, Chen, Q, Humphrey, D S, Shluger, A L and Thornton, G (2010) Bonding of Methyl Phosphonate to TiO2(110). Journal of Physical Chemistry C, 114 (40). pp. 16983-16988. ISSN 1932-7447

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Abstract

We have used scanning tunneling, microscopy (STM), noncontact atomic force microscopy (NC-AFM), low energy electron diffraction (LEED), and ab initio calculations to study adsorbates resulting from exposure of rutile TiO2(110)1 x 1 to methyl phosphonic acid (Ch(3)P=O(OH)(2)). At low exposures, adsorbates appear on the 5-fold coordinated Ti (Ti-5c) rows. As the coverage of adsorbates approaches 0.5 ML. STM images show an ordered 2 x 1 overlayer consistent with LEED. We propose that the phosphonic acid is deprotonated with the resulting phosphonate bridging across two adjacent Ti-5c atoms in the [001] direction. This bridging conformation would lead to the observed 2 x 1 overlayer and is analogous to that found for a range of carboxylates adsorbed on TiO2(110).

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Depositing User: Qiao Chen
Date Deposited: 06 Feb 2012 21:15
Last Modified: 30 Nov 2012 17:10
URI: http://sro.sussex.ac.uk/id/eprint/30495
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