Nanotubes from carbon

Article Abstract:

Carbon nanotubes can divided into single-walled and multiwalled forms. The former is similar to an ideal fullerene fiber, are also similar to fullerenes in size, and have single-layer cylinders extending from end to end. They have uniform diameters of 1 to 2 nm and self-assemble into larger bundles when produced in the vapor phase. Multiwalled nanotubes are closer to hollow graphite fibers but have a greater level of structural perfection. They consist of concentric cylinders placed around a common central hollow and the spacing between the layers is similar to the interlayer distance in graphite.

Carbon compounds

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About dendrimers: structure, physical properties, and applications

Article Abstract:

Advances in mass spectrometry have enabled researchers to determine the purity of dendrimers. It has been proven that dendrimers are synthetic macromolecules that are almost monodisperse. Dendrimers are highly flexible molecules with very unusual properties. Their end groups are highly backfolded while the interior can expose itself to the environment and huge distortions of the dendritic shape is possible under experimental conditions. The newer dendrimers have deviating properties when compared to linear oligomers or polymers.

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Suprasupermolecules with novel properties: metallodendrimers

Article Abstract:

The chemical structure of metallodendrimers has been studied. Metallodendrimers are suprasupermolecules with unique physical, optical, electrochemical, photochemical, biological and catalytic properties. They may be used as drug carriers, enzyme mimics, MRI contrast agents and biocatalysts. It was Balzani and associates who reported the first synthesis of metallodendrimers with homo- and heterometallic branching centers in 1992.

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