Bonding configurations of catechol on rutile and anatase TiO2

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

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 proceeding › Conference 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 language	English (US)
Title of host publication	American Chemical Society - 235th National Meeting, Abstracts of Scientific Papers
State	Published - 2008
Event	235th National Meeting of the American Chemical Society, ACS 2008 - New Orleans, LA, United States Duration: Apr 6 2008 → Apr 10 2008

Publication series

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

Other

Other	235th National Meeting of the American Chemical Society, ACS 2008
Country/Territory	United States
City	New Orleans, LA
Period	4/6/08 → 4/10/08

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)

Cite this

@inproceedings{d1046fe44d4f44a7a7a6a153eee58b8c,

title = "Bonding configurations of catechol on rutile and anatase TiO2",

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.",

author = "Peter Jacobson and Jianguo Wang and Matthew Connors and Gong, {Xue Qing} and Annabella Selloni and Ulrike Diebold",

year = "2008",

language = "English (US)",

isbn = "9780841269859",

series = "ACS National Meeting Book of Abstracts",

booktitle = "American Chemical Society - 235th National Meeting, Abstracts of Scientific Papers",

}

Jacobson, P, Wang, J, Connors, M, Gong, XQ, 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, 235th National Meeting of the American Chemical Society, ACS 2008, New Orleans, LA, United States, 4/6/08.

TY - GEN

T1 - Bonding configurations of catechol on rutile and anatase TiO2

AU - Jacobson, Peter

AU - Wang, Jianguo

AU - Connors, Matthew

AU - Gong, Xue Qing

AU - Selloni, Annabella

AU - Diebold, Ulrike

PY - 2008

Y1 - 2008

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=77955605266&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77955605266&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:77955605266

SN - 9780841269859

T3 - ACS National Meeting Book of Abstracts

BT - American Chemical Society - 235th National Meeting, Abstracts of Scientific Papers

T2 - 235th National Meeting of the American Chemical Society, ACS 2008

Y2 - 6 April 2008 through 10 April 2008

ER -