title: Hybrid nanoparticles by step-growth Sonogashira coupling in disperse systems.
abstract: Organic/inorganic hybrid nanoparticles were prepared by a Sonogashira miniemulsion polymerization of dibromo aryl and diethynyl aryl monomers and modified titanium dioxide and cadmium selenide nanocrystals, respectively. The poly(arylene ethynylene) microstructure and polymerization rates, as reflected by monomer reactivity, decisively impact whether inorganic guest particles can be trapped to afford a uniform distribution within a newly formed polymer particle or phase separate. This issue was found to be more critical for the TiO2 rods studied here. To this end, the compatibility of the organic and inorganic portions could be improved substantially by the incorporation of functional groups that bind the inorganic surface to the polymer via an appropriate termonomer. This concept, in combination with rapid particle formation via a postpolymerization dispersion of a premade poly(arylene ethynylene)/TiO2 composite as an alternative technique, yielded composite particles with a high loading of the inorganic nanoparticles.
authors.affiliation: Chair of Chemical Materials Science, Department of Chemistry, University of Konstanz , Universitätstrasse 10, D-78457 Konstanz, Germany.
authors.forename: Christoph
authors.initials: C
authors.lastname: Jung
authors.forename: Marina
authors.initials: M
authors.lastname: Krumova
authors.forename: Stefan
authors.initials: S
authors.lastname: Mecking