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Synthesis and Supramolecular Association of Immobilized NCN‐Pincer Platinum( II ) Complexes on Hyperbranched Polyglycerol Supports
Author(s) -
Stiriba SalahEddine,
Slagt Martijn Q.,
Kautz Holger,
Klein Gebbink Robertus J. M.,
Thomann Ralf,
Frey Holger,
van Koten Gerard
Publication year - 2004
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.200305454
Subject(s) - platinum , supramolecular chemistry , pincer movement , macromolecule , chemistry , polymer chemistry , pincer ligand , transmission electron microscopy , covalent bond , crystallography , materials science , organic chemistry , catalysis , crystal structure , nanotechnology , biochemistry
Pertosylation of hyperbranched polyglycerol ( M n =2000; M w /M n =1.3) followed by partial displacement of the tosyl groups with carboxylic acid functionalized NCN‐pincer platinum( II ) complexes [PtI‐2,6‐(NMe 2 CH 2 ) 2 C 6 H 2 ‐4‐COOH], resulted in covalent attachment of the NCN‐pincer complexes to the polyglycerol. These functionalized hyperbranched macromolecules have been characterized by 1 H, 13 C, and 195 Pt NMR, UV‐visible, and IR spectroscopy. The presence of Pt and I atoms renders them directly visible by transmission electron microscopy (TEM) without staining procedures, which offers images of associated hyperbranched macromolecules. TEM micrographs show disk‐shaped structures with a small size‐distribution (15–20 nm), and characteristic core‐shell ring structures. The thickness of the corona observed in TEM could be correlated with the substitution degree with pincer platinum moieties.