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      Fluorescent Platinum Nanoclusters: Synthesis, Purification, Characterization, and Application to Bioimaging

      , , , ,
      Angewandte Chemie
      Wiley

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          Protein-directed synthesis of highly fluorescent gold nanoclusters.

          A simple, one-pot, "green" synthetic route, based on the "biomineralization" capability of a common commercially available protein, bovine serum albumin (BSA), has been developed for the preparation of highly stable Au nanocrystals (NCs) with red emission and high quantum yield.
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            Dendrimer-encapsulated metal nanoparticles: synthesis, characterization, and applications to catalysis.

            This Account reports the synthesis and characterization of dendrimer-encapsulated metal nanoparticles and their applications to catalysis. These materials are prepared by sequestering metal ions within dendrimers followed by chemical reduction to yield the corresponding zerovalent metal nanoparticle. The size of such particles depends on the number of metal ions initially loaded into the dendrimer. Intradendrimer hydrogenation and carbon-carbon coupling reactions in water, organic solvents, biphasic fluorous/organic solvents, and supercritical CO2 are also described.
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              Cytotoxicity of colloidal CdSe and CdSe/ZnS nanoparticles.

              Cytotoxicity of CdSe and CdSe/ZnS nanoparticles has been investigated for different surface modifications such as coating with mercaptopropionic acid, silanization, and polymer coating. For all cases, quantitative values for the onset of cytotoxic effects in serum-free culture media are given. These values are correlated with microscope images in which the uptake of the particles by the cells has been investigated. Our data suggest that in addition to the release of toxic Cd(2+) ions from the particles also their surface chemistry, in particular their stability toward aggregation, plays an important role for cytotoxic effects. Additional patch clamp experiments investigate effects of the particles on currents through ion channels.
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                Author and article information

                Journal
                Angewandte Chemie
                Angew. Chem.
                Wiley
                00448249
                January 10 2011
                January 10 2011
                December 09 2010
                : 123
                : 2
                : 451-455
                Article
                10.1002/ange.201004907
                39b3d196-849d-40d0-8396-67bfebf004bf
                © 2010

                http://doi.wiley.com/10.1002/tdm_license_1.1

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