Oligosaccharide-modified poly(propyleneimine) dendrimers: synthesis, structure determination, and Cu(II) complexation.
The multiple application of reductive amination on primary amino groups of first and second generation poly(propyleneimine) dendrimers is used as a one-pot approach to introduce twice the amount of the oligosaccharide units as surface groups, compared to initially present amino groups in the first and second generation dendrimers. This was proven by (1)H NMR, MALDI-TOF-MS, and LILBID-MS analysis. The size of these dendrimers was determined by the hydrodynamic radius using pulsed field gradient NMR and dynamic light scattering. Molecular modeling confirmed the presence of dense-shell dendrimers. These dendrimers exhibit a generation dependent Cu(II)/dendrimer ratio in an aqueous environment, highlighting these materials as possible metal-carrier systems with a well-defined oligosaccharide protection shell for application in a biological environment.
Appelhans
Dietmar
D
Leibniz Institute of Polymer Research Dresden, Hohe Strasse 6, Dresden, Germany. applhans@ipfdd.de
Zhong
Yong
Y
Komber
Hartmut
H
Friedel
Peter
P
Oertel
Ulrich
U
Scheler
Ulrich
U
Morgner
Nina
N
Kuckling
Dirk
D
Richter
Sven
S
Seidel
Jürgen
J
Brutschy
Bernhard
B
Voit
Brigitte
B
D003300:Copper / Q000737:chemistry*; D050091:Dendrimers / Q000138:chemical synthesis / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D015394:Molecular Structure; D009844:Oligosaccharides / Q000138:chemical synthesis / Q000737:chemistry; D011126:Polypropylenes / Q000138:chemical synthesis / Q000737:chemistry
D050091:Dendrimers; D009844:Oligosaccharides; D011126:Polypropylenes; C443641:poly(propyleneimine); D003300:Copper