Titanium niobate and titanium tantalite nanosheets as strong solid acid catalysts

Article Abstract:

HTiNbO5, HTi2NbO7 and HTiTaO5 nanosheet, prepared by exfoliation of protonated cation-exchangeable layered metal oxides, function as strong solid acids for the esterification of acetic acid and hydrolysis of ethyl acetate, acid-catalyzed reactions. The acid catalytic activity of these titanium niobate/tantalate nanosheets analyzed by H1 magic-angle-spinning nuclear magnetic resonance spectroscopy (H1 MAS NMR), revealed the presence of strong Bronsted active sites in the form of bridging hydroxyl groups.

All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Acetic Acid, Methods, Hydrolysis, Titanium compounds, Atomic properties, Ethyl acetate

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Photoconductive properties of organic-inorganic hybrid films of layered perovskite-type niobate

Article Abstract:

A hybrid film of layered niobate and an organic amphiphile was prepared by the Langmuir-Blodgent (LB) method. From the FT-IR and XRD results, it was deduced that the photomodification of LB films caused the decomposition of organic templates accompanied by the collapse of layer-by layer structures, dc analyses on the 5-and 10-layered films after photomodification also showed that they behaved as a photosemiconductor under UV light illumination.

Analysis, Decomposition (Chemistry), Photolysis

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Preparation and nonlinear optical properties of inorganic-organic hybrid films with various substituents on chromophores

Article Abstract:

The chromophore-attached precursors and a sol-gel process were successfully synthesized to give inorganic-organic hybrid nonlinear optical (NLO) films. The hybrid films exhibit large optical nonlinearity and full transparency in the visible range.

Nonlinear optics, Chromophores

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