Time-resolved resonance Raman spectroscopic studies of the photosensitization of colloidal titanium dioxide

Journal Article · Thu Dec 27 00:00:00 EST 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100389a007· OSTI ID:6148507

Umapathy, S; Cartner, A M; Hester, R E ^[1]; Parker, A W ^[2]

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1. Univ. of York (England)
2. Rutherford Appleton Laboratory, Chilton (England)

Resonance Raman and time-resolved resonance Raman spectroscopies have been used to study the surface interactions of substituted bipyridyl complexes of ruthenium(II) as sensitizers with the colloidal semiconductor TiO{sub 2}. It has been shown that the adsorption of ruthenium(II) tris((2,2{prime}-bipyridyl)-4,4{prime}-dicarboxylate) (RB4H) onto a colloidal TiO{sub 2} surface is through the solvation layer, whereas cis-diaquaruthenium(II) bis((2,2{prime}-bipyridyl)-4,4{prime}-dicarboxylate) (RBDA) adsorption is via the water ligands of the complex. The transient Raman spectrum of the metal-ligand charge-transfer triplet excited state of the ethyl ester of RB4H is reported. Analysis of the spectrum provides conclusive evidence for the excited electron being localized on one of the ligands. The photosensitization of TiO{sub 2} by RB4H and RBDA has also been studied by using time-resolved resonance Raman spectroscopy.

• OSTI ID: 6148507
• Journal Information: Journal of Physical Chemistry; (USA), Vol. 94:26; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
TITANIUM OXIDES
PHOTOSENSITIVITY
RAMAN SPECTROSCOPY
COLLOIDS
EXPERIMENTAL DATA
MEASURING METHODS
RUTHENIUM COMPLEXES
SOLAR ENERGY CONVERSION
SURFACE PROPERTIES
CHALCOGENIDES
COMPLEXES
CONVERSION
DATA
DISPERSIONS
ENERGY CONVERSION
INFORMATION
LASER SPECTROSCOPY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
SENSITIVITY
SPECTROSCOPY
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
140505* - Solar Energy Conversion- Photochemical
Photobiological
& Thermochemical Conversion- (1980-)
400500 - Photochemistry