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Photoinduced electron transfer (PET) reactions in room temperature ionic liquid (RTIL) have been paid great interests due to their potential applications in the field of solar energy conversion. In this work, we selected four commonly used coumarin dyes and studied the bimolecular PET reaction between respective coumarin dye and N,N-dimethylaniline (DMA) in [Emim][BF 4 ], [Bmim][BF 4 ...
•Proposed mechanisms for photoproducts from 4-chloro-2-methylphenoxyacetic acid.•All carboxylic acid groups will be dissociated at neutral pH in pure water.•2,6-Dimethyl-1,4-hydroquinone from photodecarboxylation.•2,5-Dihydroxy-3-methylbenzaldehyde via intermolecular redox/decarboxylation/oxidation.
The photocatalytic removal of Rhodamine B dye was successfully carried under UV irradiation over mesoporous SnO 2 /TiO 2 nanoparticles embedded various molar compositions of SnO 2 (0–25%) synthesized by sol–gel process using polymethylmethacrylate as template. Structural and textural features of the samples were investigated by X-ray diffraction (XRD), nitrogen adsorption–desorption...
Tetraphenylporphyrin (H2TPP), covalently linked to four 2-pyridone moieties was synthesized (II) and studied. This composite molecule, in combination with light and ground state oxygen, has the ability to generate, trap, store, and release singlet oxygen. The process can be operated reversibly without detectable decomposition or side reactions using light with wavelength greater than 500nm. Oxidation...
The intramolecular charge transfer (ICT) exhibiting fluorophore trans-2-[4′-(dimethylamino)styryl]benzimidazole (t-DMASBI) is synthesized and its spectral characteristics are investigated using absorption and fluorescence techniques. The solvatochromic studies reveal that the molecule is emitting from the locally excited state in non-polar and from an ICT state in polar solvents. Photoisomerization...
•We have prepared transition metal complexes of a new fullerene–bipyridine ligand.•We have completed a detailed photophysical characterization of the ligand and complexes.•For the ligand the excited-state manifold exhibits independent states on the fullerene and bipyridine.•For the complex the ligand excited states are still predominant along with a dark charge separated state.•Characteristics representing...
Ni–TiO 2 /Al 2 O 3 photocatalysts prepared by Double Impregnation Method using a new biodegradable chelates e.g. S,S-ethylenediaminedisuccinic acid (EDDS), tetrasodium salt of N-(1,2-dicarboxyethyl)-d,l-aspartic acid (available as product Baypure CX 100) and poly(aspartic acid) (available as product Baypure DS), instead of typically used EDTA, were tested in the photo removal...
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