Adsorption of dopamine on rutile TiO2 (110): A photoemission and near-edge x-ray absorption fine structure study

Mark J. Jackman; Karen L. Syres; David J H Cant; Samantha J O Hardman; Andrew G. Thomas

doi:10.1021/la501357b

Adsorption of dopamine on rutile TiO2 (110): A photoemission and near-edge x-ray absorption fine structure study

Mark J. Jackman, Karen L. Syres, David J H Cant, Samantha J O Hardman, Andrew G. Thomas

Research output: Contribution to journal › Article › peer-review

Abstract

Synchrotron radiation photoelectron spectroscopy and near-edge X-ray absorption fine structure (NEXAFS) techniques have been used to study the adsorption of dopamine on a rutile TiO2 (110) single crystal. Photoemission results suggest that dopamine bonds through the oxygen molecules in a bidentate fashion. From the data, it is ambiguous whether the oxygens bond to the same 5-fold coordinated surface titanium atom or bridges across two, although based on the bonding of pyrocatechol on rutile TiO2 (110), it is likely that the dopamine bridges two titanium atoms. Using the searchlight effect, the carbon K-edge near-edge X-ray absorption fine structure NEXAFS spectra recorded for dopamine on rutile TiO2 (110) show the phenyl ring to be oriented at 78° ± 5° from the surface and twisted 11 ± 10° relative to the (001) direction.

Original language	English
Pages (from-to)	8761-8769
Number of pages	8
Journal	Langmuir
Volume	30
Issue number	29
DOIs	https://doi.org/10.1021/la501357b
Publication status	Published - 8 Jul 2014

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http://pubs.acs.org/journal/langd5

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@article{7c17086a02844158b8cc31ed43076342,

title = "Adsorption of dopamine on rutile TiO2 (110): A photoemission and near-edge x-ray absorption fine structure study",

abstract = "Synchrotron radiation photoelectron spectroscopy and near-edge X-ray absorption fine structure (NEXAFS) techniques have been used to study the adsorption of dopamine on a rutile TiO2 (110) single crystal. Photoemission results suggest that dopamine bonds through the oxygen molecules in a bidentate fashion. From the data, it is ambiguous whether the oxygens bond to the same 5-fold coordinated surface titanium atom or bridges across two, although based on the bonding of pyrocatechol on rutile TiO2 (110), it is likely that the dopamine bridges two titanium atoms. Using the searchlight effect, the carbon K-edge near-edge X-ray absorption fine structure NEXAFS spectra recorded for dopamine on rutile TiO2 (110) show the phenyl ring to be oriented at 78° ± 5° from the surface and twisted 11 ± 10° relative to the (001) direction.",

author = "Jackman, {Mark J.} and Syres, {Karen L.} and Cant, {David J H} and Hardman, {Samantha J O} and Thomas, {Andrew G.}",

note = "The authors thank MAX-lab for the award of experimental beam time funded by the Swedish Research Council and The 482 European Community{\textquoteright}s Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 226716. M.J.J. and D.J.H.C. thank EPSRC (UK) for the award of studentships through the NowNano Doctoral Training Centre (grant EP/G03737X/1). K.L.S. thanks EPSRC (UK) for a studentship. S.J.O.H. was funded by EPSRC grant no. EP/E036287/1. A.T. thanks the Photon Science Institute and The University of Manchester for funding.",

year = "2014",

month = jul,

day = "8",

doi = "10.1021/la501357b",

language = "English",

volume = "30",

pages = "8761--8769",

journal = "Langmuir",

issn = "0743-7463",

publisher = "American Chemical Society",

number = "29",

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TY - JOUR

T1 - Adsorption of dopamine on rutile TiO2 (110): A photoemission and near-edge x-ray absorption fine structure study

AU - Jackman, Mark J.

AU - Syres, Karen L.

AU - Cant, David J H

AU - Hardman, Samantha J O

AU - Thomas, Andrew G.

N1 - The authors thank MAX-lab for the award of experimental beam time funded by the Swedish Research Council and The 482 European Community’s Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 226716. M.J.J. and D.J.H.C. thank EPSRC (UK) for the award of studentships through the NowNano Doctoral Training Centre (grant EP/G03737X/1). K.L.S. thanks EPSRC (UK) for a studentship. S.J.O.H. was funded by EPSRC grant no. EP/E036287/1. A.T. thanks the Photon Science Institute and The University of Manchester for funding.

PY - 2014/7/8

Y1 - 2014/7/8

N2 - Synchrotron radiation photoelectron spectroscopy and near-edge X-ray absorption fine structure (NEXAFS) techniques have been used to study the adsorption of dopamine on a rutile TiO2 (110) single crystal. Photoemission results suggest that dopamine bonds through the oxygen molecules in a bidentate fashion. From the data, it is ambiguous whether the oxygens bond to the same 5-fold coordinated surface titanium atom or bridges across two, although based on the bonding of pyrocatechol on rutile TiO2 (110), it is likely that the dopamine bridges two titanium atoms. Using the searchlight effect, the carbon K-edge near-edge X-ray absorption fine structure NEXAFS spectra recorded for dopamine on rutile TiO2 (110) show the phenyl ring to be oriented at 78° ± 5° from the surface and twisted 11 ± 10° relative to the (001) direction.

AB - Synchrotron radiation photoelectron spectroscopy and near-edge X-ray absorption fine structure (NEXAFS) techniques have been used to study the adsorption of dopamine on a rutile TiO2 (110) single crystal. Photoemission results suggest that dopamine bonds through the oxygen molecules in a bidentate fashion. From the data, it is ambiguous whether the oxygens bond to the same 5-fold coordinated surface titanium atom or bridges across two, although based on the bonding of pyrocatechol on rutile TiO2 (110), it is likely that the dopamine bridges two titanium atoms. Using the searchlight effect, the carbon K-edge near-edge X-ray absorption fine structure NEXAFS spectra recorded for dopamine on rutile TiO2 (110) show the phenyl ring to be oriented at 78° ± 5° from the surface and twisted 11 ± 10° relative to the (001) direction.

U2 - 10.1021/la501357b

DO - 10.1021/la501357b

M3 - Article

SN - 0743-7463

VL - 30

SP - 8761

EP - 8769

JO - Langmuir

JF - Langmuir

IS - 29

ER -

Adsorption of dopamine on rutile TiO2 (110): A photoemission and near-edge x-ray absorption fine structure study

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