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Grafting Perylenes to ZnO Nanoparticles
Author(s) -
Schönamsgruber Jörg,
Zeininger Lukas,
Hirsch Andreas
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201303416
Subject(s) - perylene , surface modification , zeta potential , dendrimer , nanoparticle , dynamic light scattering , materials science , thermogravimetric analysis , moiety , chemical engineering , photochemistry , ostwald ripening , dispersity , nanotechnology , polymer chemistry , chemistry , organic chemistry , molecule , engineering
A new prototype of dendritic perylenes suitable for the chemical functionalization of inorganic nanoparticles was synthesized and characterized. The bay‐functionalized perylene core of these molecular architectures was coupled to a catechol moiety, which serves as an anchor group for the functionalization of metal oxides, in particular ZnO. To increase the solubility of both the perylene and the targeted hybrid nanostructures, a Newkome‐type dendron bearing nine positive charges was introduced. This charge was also employed to stabilize the nanoparticles and further protect them from Ostwald ripening through Coulombic repulsion. ZnO quantum dots with an average diameter of 5 nm were synthesized and functionalized with the perylene derivative. Successful functionalization was clearly demonstrated by dynamic light scattering, zeta‐potential measurements, thermogravimetric analysis/MS, and UV/Vis and fluorescence spectroscopy. The generated particle dispersions were stable against agglomeration for more than eight weeks.