Spectroscopy and photo physics of self-organized zinc porphyrin nanolayers. 3. Fluorescence detected magnetic resonance of triplet states

Article Abstract:

Two papers were reported that focused on the nature and properties of the photo excited porphyrin triplet states in zinc porphyrin solid films, and were studied by using fluorescence detected magnetic resonance (FDMR). The zinc tetraphenylporphyrin (ZnTPP) films contain only a single, ligand, triplet species with zero-field splitting (ZFS) parameters very similar to those of ligated zinc tetra-(p-octylphenyl)-porphyrin (ZnTOPP).

Magnetic resonance, Zinc compounds

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Catalysis with transition metal nanoparticles in colloidal solution: Nanoparticle shape dependence and stability

Article Abstract:

The work on the effect of the shape of the colloidal nanocatalyst on the catalytic activity and the effect of the catalytic process on the shape and size of the colloidal transition metal of the nanocatalysts and their recycling potential is reviewed. It provides important clues on the mechanism of the reactions that is studied and can be very useful in the process of designing better catalysts in the future.

Transition metals, Catalysis, Colloid chemistry

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Thermal wetting of platinum nanocrystals on silica surface

Article Abstract:

A study investigates the thermal stability of facetted Pt nanocrystals on amorphous silica support films by using in situ transmission electron microscopy in a temperature range between 25 and 800 degree Celsius. Results shows that temperature-induced wetting of Pt nanoparticles on silica surface can be attributed to the interfacial mixing of Pt and SiO2 and the resulting negative interface energy.

Spectra, Transmission electron microscopes, Platinum compounds

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