Characterization of the adsorption of ru-bpy dyes on mesoporous TiO2 films with UV-Vis, Raman, and FTIR spectroscopies

被引：250

作者：

León, CP ^{[1
]}

Kador, L

Peng, B

Thelakkat, M

机构：

[1] Univ Bayreuth, Inst Phys, D-95440 Bayreuth, Germany

[2] Univ Bayreuth, Bayreuther Inst Makromolekulforsch, D-95440 Bayreuth, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2006年 / 110卷 / 17期

关键词：

D O I：

10.1021/jp0561827

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In the present work the adsorption of a new dye, [Ru(dcbpyH(2))(2)(bpy-TPA(2))](PF6)(2), and the well-known (Bu4N)(2)-[Ru(dcbpyH)(2)(NCS)(2)] complex on mesoporous anatase films were investigated to clarify the role of the carboxylate groups in the anchoring process of the dyes on the semiconductor surface. For this purpose UV-vis, Raman, resonance Raman, and ATR-FTIR spectroscopies have been used. The results of the Raman experiments at different excitation wavelengths demonstrate that photoinduced charge-transfer processes take place efficiently between the adsorbate and the substrate. Moreover, this is the first time that the Raman spectrum of a Ru-bpy dye (in this case, the dye N719) adsorbed on TiO2 has been obtained without the resonance condition, only by means of SERS enhancement. The coordination of both complexes on the TiO2 paste films is proposed to occur via bidentate or bridging linkage.

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页码：8723 / 8730

页数：8

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