Transient Absorption Spectroscopy of Ruthenium and Osmium Polypyridyl Complexes Adsorbed onto Nanocrystalline TiO2 Photoelectrodes
نویسندگان
چکیده
منابع مشابه
Preparation and application of new ruthenium(II) polypyridyl complexes as sensitizers for nanocrystalline TiO2
A series of Ru-(II) polypyridyl complexes, containing carboxylicand sulphonic ‘anchor’ groups, were synthesized as sensitizers for nanocrystalline TiO2. Depending on number and type of ligands the sensitizers are divided into three classes: tris-homoleptic complexes 1a–d, tris-heteroleptic complexes 2a–d and bis-complexes 3a–f. The compounds were characterized and the photophysical and electroc...
متن کاملUltrafast transient IR spectroscopy and DFT calculations of ruthenium(ii) polypyridyl complexes.
Ultrafast time-resolved infrared spectroscopy of [Ru(bpy)3]2+ (bpy = 2,2'-bipyridine), [Ru(mbpy)3]2+ (mbpy = 6-methyl-2,2'-bipyridine) and [Ru(mphen)3]2+ (mphen = 2-methyl-1,10'-phenanthroline) in deuterated acetonitrile serves to elucidate the evolution of the system following pulsed excitation into the 1MLCT band at 400 nm. While for [Ru(bpy)3]2+ no intermediate state can be evidenced for the...
متن کاملEmission spectroscopy of a ruthenium(ii) polypyridyl complex adsorbed on calcium niobate lamellar solids and nanosheets.
Ru(ii) tris-diimine complexes are known to exhibit emission at around 630 nm as a result of (1)MLCT photoexcitation. The emission is quenched in the presence of a suitable semiconductor solid due to electron injection from the excited state of a Ru(ii) complex to the conduction band of the adjacent semiconductor. Here we investigated emission quenching behaviour of Ru(II){(4,4'-(CH3)2-bpy)2(4,4...
متن کاملnitrido complexes of ruthenium and osmium
Ru=O complexes have been demonstrated to be competent oxidants for oxidation of saturated hydrocarbons and epoxidat ion of alkenes . Photoexcitation of transdioxoosmium(V1) gives rise to super-oxidizing complexes having EO >2.2 V vs. n.h.e.. Some cationic RuZN and OsZN complexes are good model system for study of the mechanism of metalcatalysed oxidation of ammonia to nitrite and activation of ...
متن کاملKelvin probe force microscopy of nanocrystalline TiO2 photoelectrodes
Dye-sensitized solar cells (DSCs) provide a promising third-generation photovoltaic concept based on the spectral sensitization of a wide-bandgap metal oxide. Although the nanocrystalline TiO2 photoelectrode of a DSC consists of sintered nanoparticles, there are few studies on the nanoscale properties. We focus on the microscopic work function and surface photovoltage (SPV) determination of TiO...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of Physical Chemistry B
سال: 2002
ISSN: 1520-6106,1520-5207
DOI: 10.1021/jp014589f