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Very Facile Polarity Umpolung and Noncovalent Functionalization of Inorganic Nanoparticles: A Tool Kit for Supramolecular Materials Chemistry
Author(s) -
Zeininger Lukas,
Petzi Stefanie,
Schönamsgruber Jörg,
Portilla Luis,
Halik Marcus,
Hirsch Andreas
Publication year - 2015
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.201501682
Subject(s) - supramolecular chemistry , amphiphile , chemistry , non covalent interactions , nanoparticle , surface modification , umpolung , molecule , self assembly , covalent bond , combinatorial chemistry , supramolecular assembly , nanotechnology , chemical engineering , organic chemistry , materials science , copolymer , hydrogen bond , polymer , catalysis , engineering , nucleophile
The facile assembly of shell‐by‐shell (SbS)‐coated nanoparticles [TiO 2 PAC 16 ]@shell 1 – 7 (PAC 16 =hexadecylphosphonic acid), which are soluble in water and can be isolated as stable solids, is reported. In these functional architectures, an umpolung of dispersibility (organic apolar versus water) was accomplished by the noncovalent binding of ligands 1 – 7 to titania nanoparticles [TiO 2 PAC 16 ] containing a first covalent coating with PAC 16 . Ligands 1 – 7 are amphiphilic and form the outer second shell of [TiO 2 PAC 16 ]@shell 1 – 7 . The tailor‐designed dendritic building blocks 3 – 5 contain negative and positive charges in the same molecule, and ligands 6 and 7 contain a perylenetetracarboxylic acid dimide (PDI) core ( 6 / 7 ) as a photoactive reporter component. In the redox and photoactive system [TiO 2 PAC 16 ]@shell 7 , electronic communication between the inorganic core to the PDI ligands was observed.