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.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2004
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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.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
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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.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
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