Photochemistry of azobenzene in microporous aluminophosphate AlPO4-5

Article Abstract:

The spectra and photochemistry of trans-azobenzene incorporated into the eight angstrom channels of AlPO4-5 have been studied. Uniform crystals of AlPO4-5 were prepared according to the procedure used by Finger. The dispersed aluminum oxide hydrate sol was prepared by adding 1.3889 g of boehmite to 40 mL of water in the presence of 0.8 mL of 1.4% HNO3 and stirred for 45 min. Results indicate the Bronsted acidity of AlPO4-5 can protonate the azo groups in azobenzene. Emission occurs at 518 nm at room temperature due to the protonated form of azobenzene.

Analysis, Aluminum compounds, Photochemistry, Azo compounds

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Intrazeolitic photochemical charge separation for Ru(bpy)3(2+)-bipyridinium system: role of the zeolite structure

Article Abstract:

A study was conducted to analyze the intrazeolitic photoelectron transfer from trisbipyridyl ruthenium (II) that was prepared within zeolite Y supercages to ion-exchanged bipyridinium molecules in neighboring supercages. A kinetic framework was utilized to obtain the back electron transfer rate at high loadings with the rate constants for electron hopping. Results indicated that the zeolite framework supports a critical function in influencing electron transfer rates through the arrangement of acceptor and donor molecules.

Ruthenium, Photoelectrons

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Nanometer-sized zeolite X crystals: use as photochemical hosts

Article Abstract:

The preparation and properties of nanometer-sized faujasite-type zeolite crystallites for artificial photosynthetic applications were investigated by synthesizing Ru(bpy)(sub 3)(super 2+) in these zeolites in the presence of sucrose. The synthesis was modified twice to further examine the framework degradation. The photochemical charge separation efficiency of nanocrystallites was found to be better than that of the conventional micro-sized zeolite Y.

Reports, Crystals, Photochemical research

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