A single centre water splitting dye complex adsorbed on rutile TiO2(110): Photoemission, x-ray absorption, and optical spectroscopy

作者：Weston Matthew^*; Reade Thomas J; Britton Andrew J; Handrup Karsten; Champness Neil R; O'Shea James N

来源：Journal of Chemical Physics, 2011, 135(11): 114703.

DOI：10.1063/1.3637497

A single centre water splitting dye complex (aqua(2,2'-bipyridy1-4,4'-dicarboxylic acid)-(2,2':6',6 ''-terpyridine)Ruthenium(II)), along with a related complex ((2,2'-bipyridy1-4,4'-dicarboxylic acid)(2,2':6',6 ''-terpyridine)chloride Ruthenium(II)), has been investigated using photoemission and compared to molecules with similar structures. Dye molecules were deposited in situ using ultra-high vacuum electrospray deposition, which allows for the deposition of thermally labile molecules, such as these dye molecules. Adsorption of the dye molecules on the rutile TiO2(110) surface has been studied using core-level and valence photoemission. Core-level photoemission spectra reveal that each complex bonds to the surface via deprotonation of its carboxylic acid groups. A consideration of the energy level alignments reveals that both complexes are capable of charge transfer from the adsorbed molecules to the conduction band of the rutile TiO2 substrate.

• 出版日期2011-9-21