Different orientations of large rigid organic chromophores at the rutile TiO2 surface controlled by different binding geometries of specific anchor groups

被引：33

作者：

Gundlach, L. ^{[1
]}

Szarko, J. ^{[1
]}

Socaciu-Siebert, L. D. ^{[1
]}

Neubauer, A. ^{[1
]}

Ernstorfer, R. ^{[1
]}

Willig, F. ^{[1
]}

机构：

[1] Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.75.125320

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polarization and angle-resolved two-photon photoelectron spectroscopy was employed to determine the adsorption geometry of di-tert-butyl-perylene when anchored via two different acid groups on rutile TiO2(110). With the carboxylic acid group as anchor and a rigid bridge group the binding geometry of the chromophore was found with the long molecular axis perpendicular to the surface. In contrast, with the phosphonic acid as anchor group the long axis of perylene showed a tilt angle of around 66 degrees with respect to the surface normal and an alignment in the direction perpendicular to [001]. Our experimental results agree with adsorption geometries recently predicted from DFT calculations by Persson's group.

引用

页数：8

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