A cross-linked polyethyleneimine polymer containing the[ZnWZn2(H2O)2(ZnW9O34)2] poly-oxometalate was prepared from branched polyethyleneimine(Mw ) 600), the polyoxometalate, and an-octylamine-epichlorohydrin cross-linking reagent. This catalytic assembly was active for the selectiveoxidation of 2-alkanols to 2-alkanones with aqueous H2O2 with reactions presumably occurring a...

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The key issues, associated with nanocarriers for small interfering RNAs (siRNAs), are their poor stability and lack of tumor targetability in vivo. To address these issues, we developed gold-installed polyethyleneimine/siRNA complexes with a corona of PEGylated hyaluronic acid.

Polyethyleneimine (PEI) is known for its metal-coordinating properties and in its crosslinked form has applications in different areas ranging from drug delivery to waste water treatment and recovery of trace metals. With the aim to regulate the coordination environment of Cu(I) and Cu(II) ions in marine coatings, we have prepared a triazole cross-linking agent with 'soft' coordination that can...

one of the problems in the case of stainless steels is their low corrosion resistance against pitting corrosionin chloride containing environments, thereby leading to severe damage to industries. in this research, the pitting corrosion of 304 austenitic stainless steel was studied in 3.5% nacl solution at room temperature (25˚c) by performing electrochemical measurements (containing cyclic pola...

A hydrophilic, positively charged, durable coating has been developed for capillary electrophoresis of macromolecules. Polyethyleneimine is adsorbed to the inner wall of fused silica capillaries and the adsorbed coating cross-linked into a stable layer. Capillaries of polyethyleneimine-coated silica gave unique separations owing to the reversal of electro-osmotic flow caused by the positively c...

In this paper, based on the previous steps, a facile in situ reduction method was developed to controllably prepare polystyrene/Ag (PS/Ag) core-shell-shaped nanostructures. The crucial procedure includes surface treatment of polystyrene core particles by cationic polyelectrolyte polyethyleneimine, in situ formation of Ag nanoparticles, and immobilization of the Ag nanoparticles onto the surface...