Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 116, Issue 34, Pages 18184-18192Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp3025864
Keywords
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Funding
- European Community
- Royal Society Wolfson Merit Award
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The adsorption of two ruthenium-based dye complexes containing dipyrrin-based ligands has been studied on the rutile TiO2(110) surface using synchrotron-based electron spectroscopy. The dye complexes studied were bis(5-(4-carboxypheny1)-4,6-dpyrrin)bis(dimethyl sulfordde)ruthenium(II) and bis(5-(4-carboxypheny1)-4,6-dipyrrin)-(2,2'-bipyridine)ruthenium(II). The dye molecules were deposited using in situ electrospray deposition, which allows for the deposition of thermally fragile molecules in ultrahigh vacuum. Photoemission studies were used to provide experimental data on the bonding geometry of the dye complexes to the rutile TiO2(110) substrate and to provide data on molecular orbitals involved in the charge transfer process. DFT calculations of the molecules adsorbed onto the rutile TiO2(110) surface have also been performed to identify the most energetically favorable bonding geometry.
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