Adsorption of Dopamine on Rutile TiO2 (110): A Photoemission and Near-Edge X-ray Absorption Fine Structure Study

被引：15

作者：

Jackrnan, Mark J. ^{[1
,2
]}

Syres, Karen L. ^{[3
]}

Gant, David J. H. ^{[1
,2
]}

Hardman, Samantha J. O. ^{[1
,2
]}

Thomas, Andrew G. ^{[1
,2
]}

机构：

[1] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England

[2] Univ Manchester, Photon Sci Inst, Manchester M13 9PL, Lancs, England

[3] Univ Nottingham, Sch Chem, Nottingham NG7 2RD, England

来源：

LANGMUIR | 2014年 / 30卷 / 29期

基金：

英国工程与自然科学研究理事会; 瑞典研究理事会;

关键词：

SURFACE SCIENCE; ANATASE TIO2(101); BAND-GAP; NANOPARTICLES; TITANIUM; REACTIVITY; DEFECTS; NEXAFS; WATER;

D O I：

10.1021/la501357b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 degrees +/- 5 degrees from the surface and twisted 11 +/- 10 degrees relative to the (001) direction.

引用

页码：8761 / 8769

页数：9

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