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

Journal Article · Thu Dec 27 04:00:00 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), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:26; ISSN JPCHA; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

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