Showing papers by "Debabrata Chatterjee published in 2004"
TL;DR: In this article, the degradation of a pesticide (atrazine) in air-equilibrated aqueous mixture has been achieved on the surface of a TiO2 semiconductor modified with thionine and eosin Y by using visible light.
Abstract: Degradation of a pesticide (atrazine) in air-equilibrated aqueous mixture has been achieved on the surface of TiO2 semiconductor modified with thionine and eosin Y by using visible light. Under 5 h of irradiation with a 150 W xenon lamp, appreciable degradation of atrazine has been observed. A working mechanism involving excitation of surface adsorbed dye, followed by charge injection into the TiO2 conduction band and formation of reactive O2 −/HO2 radicals is proposed for the degradation of the pesticide to carbon dioxide. Formation of O2 − radical has been evidenced by using a chemiluminescent probe, luminol.
48 citations
TL;DR: In this article, mixed-chelate complexes of ruthenium have been synthesized using tridentate Schiff-base ligands derived by condensation of aldehydes (salicyldehyde, 2-pyridinecarboxaldehyde) with 2-aminobenzoic acid, and bidentate ligands (2,2′-bipyridine or picolinic acid).
43 citations
TL;DR: Schiff-base complexes of ruthenium (1-5) have been synthesized using Schiff-base ligands derived by condensation of either 1,2-phenylenediamine with aldehydes (salicyldehyde, 2-pyridinecarboxaldehyde) or acetylacetone with amines (2-aminophenol, 2aminomethyl pyridine). All complexes were characterized by analytical, spectroscopic, conductance, magnetic moment and electrochemical studies as discussed by the authors.
Abstract: Schiff-base complexes of ruthenium (1–5) have been synthesized using Schiff-base ligands derived by condensation of either 1,2-phenylenediamine with aldehydes (salicyldehyde, 2-pyridinecarboxaldehyde) or acetylacetone with amines (2-aminophenol, 2-aminomethylpyridine). All complexes were characterized by analytical, spectroscopic, conductance, magnetic moment and electrochemical studies. At room temperature, complexes 1–5 catalyze the oxidation of both saturated and unsaturated hydrocarbons using tert-butylhydroperoxide (t-BuOOH). A mechanism involving formation of and transfer from a reactive high valency Ru(V)-oxo species as the catalytic intermediate is proposed for the processes.
21 citations
TL;DR: In this article, a series of complexes with formal oxidation state assignments of {Ru V (O 2− )} have been examined by molecular mechanics and molecular orbital methods at the level of PM3 calculations in order to assess the origin of differences in the activity of these complexes in the conversion of benzene to phenol by oxygen transfer.
10 citations