Polyethylene imine hyperbranched

Scheme 9. (A) Different dendrimers as macromolecular scaffolds for MRI contrast agents ethylenediamine cored polyamido amine, generation 4 (PAMAM G4), top hyperbranched, ethylenediamine cored polyethylene imine (HB-PEI), bottom left hyperbranched, amino functionalized polyglycerol (HB-PG), bottom right. (B) Different moieties attached to the respective dendrimers via amide or thiourea bonds.

Fig. 4 Examples (a) PEGylated monolayer (b) Glucose-modified monolayer (c) Surface-attached hyper-branched polyethylene imine and (d) Surface-attached hyperbranched polyglycerols of surface-coatings that resist the nonspecific adsorption of proteins. (Figure reproduced in part with permission from [41])...

Amphiphilic modification of hyperbranched polyglycerol (1) or polyethylene imine) by partial esterification or, respectively, amidation with fatty acids results in macromolecules with a nonpolar shell and a polar core. Metal nanoparticles are stabilized efficiently by these materials, because the polar moieties are responsible for adsorption to the particle surface and the nonpolar region also convey solubility in nonpolar organic solvents [17,94,95]. 

Bannerjee, P., Weissleder, R., Bogdanov, A., Jr. Linear polyethylene-imine grafted to a hyperbranched polyfethylene glycol)-like core a copolymer for gene delivery. Bioconjug. Chem. 2006, 77(1), 125-131. 

LIU Liu, H., Chen, Y., and Shen, Z., Thermoresponsive hyperbranched polyethylen-imines with isobutyramide functional groups, J. Polym. Sci. Part A Polym. Chem., 45, 1177, 2007. 

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