Bonding configurations of catechol on rutile and anatase TiO2

Peter Jacobson, Jianguo Wang, Matthew Connors, Xue Qing Gong, Annabella Selloni, Ulrike Diebold

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The addition of organic and organo-metallic chromophores to TiO2 lowers the absorption threshold of light to the visible range. Thus dye sensitized TiO2 represents a promising system for use in solar energy conversion devices. The electron transfer characteristics of a dye sensitized TiO2 surface depend on the bonding configuration of the anchor group. Catechol is a small organic molecule frequently used to anchor large chromophores to the TiO2 surface. We have thus utilized angle resolved ultraviolet photoemission spectroscopy (ARUPS) to determine the bonding structure of catechol on the surfaces of the rutile and anatase polymorphs of TiO2. For catechol on rutile (110), Scanning Tunneling Microscopy studies show a densely packed 2×1 monolayer; the proposed adsorption geometry is similar to that of carboxylic acids on rutile (110). Photoemission data support a bidentate adsorption structure. The presence of lateral interactions in the densely packed monolayer is also inferred.

Original languageEnglish (US)
Title of host publicationAmerican Chemical Society - 235th National Meeting, Abstracts of Scientific Papers
StatePublished - Dec 1 2008
Event235th National Meeting of the American Chemical Society, ACS 2008 - New Orleans, LA, United States
Duration: Apr 6 2008Apr 10 2008

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727

Other

Other235th National Meeting of the American Chemical Society, ACS 2008
CountryUnited States
CityNew Orleans, LA
Period4/6/084/10/08

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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    Jacobson, P., Wang, J., Connors, M., Gong, X. Q., Selloni, A., & Diebold, U. (2008). Bonding configurations of catechol on rutile and anatase TiO2 In American Chemical Society - 235th National Meeting, Abstracts of Scientific Papers (ACS National Meeting Book of Abstracts).