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Issue 33, 2013
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Fine tuning and orientation control of surface Cu complexes on TiO2(110) premodified with mercapto compounds: the effect of different mercapto group positions

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Abstract

Three-dimensional structures of vacuum-deposited Cu species formed on TiO2(110) surfaces premodified with three mercaptobenzoic acid (MBA) isomers were studied using polarization-dependent total reflection fluorescence X-ray absorption fine structure (PTRF-XAFS). We explored the possibility of fine tuning and orientation control of the surface Cu structures, including their coordination and configuration against the surface, according to the different mercapto group positions of the three MBA isomers (o-, m-, and p-MBA). Almost linear S–Cu–O (lattice O of TiO2) surface compounds were formed on the three MBA-modified TiO2(110) surfaces; however, the orientation of the Cu species on the o- and m-MBA-modified TiO2(110) surfaces (40–45° inclined from the surface normal) was different from that on the p-MBA-modified TiO2(110) surface (60° from the surface normal). This work suggests that the selection of a different MBA isomer for premodification of a single crystal TiO2(110) surface enables fine tuning and orientation control of surface Cu complexes.

Graphical abstract: Fine tuning and orientation control of surface Cu complexes on TiO2(110) premodified with mercapto compounds: the effect of different mercapto group positions

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Publication details

The article was received on 04 Apr 2013, accepted on 25 Jun 2013 and first published on 26 Jun 2013


Article type: Paper
DOI: 10.1039/C3CP51425K
Phys. Chem. Chem. Phys., 2013,15, 14080-14088

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    Fine tuning and orientation control of surface Cu complexes on TiO2(110) premodified with mercapto compounds: the effect of different mercapto group positions

    S. Takakusagi, H. Nojima, H. Ariga, H. Uehara, K. Miyazaki, W. Chun, Y. Iwasawa and K. Asakura, Phys. Chem. Chem. Phys., 2013, 15, 14080
    DOI: 10.1039/C3CP51425K

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