Synthesis and supramolecular association of immobilized NCN-pincer platinum(II) complexes on hyperbranched polyglycerol supports.
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.
Instituto de Ciencia Molecular/Facultad de Farmacia, Av Vicent Andrés Estelles, s/n, 46100 BurjassotValencia, Spain. salah.stiriba@uv.es
Salah-Eddine
SE
Stiriba
Martijn Q
MQ
Slagt
Holger
H
Kautz
Robertus J M
RJ
Klein Gebbink
Ralf
R
Thomann
Holger
H
Frey
Gerard
G
van Koten
D002244:Carbon / Q000032:analysis / Q000737:chemistry*; D005990:Glycerol / Q000032:analysis / Q000138:chemical synthesis* / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D015394:Molecular Structure; D009584:Nitrogen / Q000032:analysis / Q000737:chemistry*; D009942:Organometallic Compounds / Q000032:analysis / Q000138:chemical synthesis* / Q000737:chemistry; D010984:Platinum / Q000737:chemistry*; D011108:Polymers / Q000032:analysis / Q000138:chemical synthesis* / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet / Q000379:methods
D009942:Organometallic Compounds; D011108:Polymers; C043941:polyglycerol; D010984:Platinum; D002244:Carbon; D009584:Nitrogen; D005990:Glycerol