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Recyclable Spherical Polyelectrolyte Brushes Containing Magnetic Nanoparticles in Core

✍ Scribed by Kaimin Chen; Yan Zhu; Li Li; Yan Lu; Xuhong Guo

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
401 KB
Volume
31
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Spherical polyelectrolyte brushes consisting of a magnetite/polystyrene nanocomposite core and a poly(acrylic acid) brush shell were prepared by photo‐emulsion polymerization. They are narrowly dispersed, superparamagnetic and redispersible after aggregating by external magnetic field, as determined by transmission electron microscopy, dynamic light scattering, thermal gravimetric analysis and a vibrating sample magnetometer. Magnetic control is thus introduced into nano‐sized spherical polyelectrolyte brushes to achieve recovery and controllable delivery in applications. This approach opens up the way for cost‐effective applications of spherical polyelectrolyte brushes.

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C–C Coupling Reaction of Triphenylbismut
C–C Coupling Reaction of Triphenylbismuth(V) Derivatives and Olefins in the Presence of Palladium Nanoparticles Immobilized in Spherical Polyelectrolyte Brushes
✍ Yulia B. Malysheva; Alexey V. Gushchin; Yu Mei; Yan Lu; Matthias Ballauff; Sebas πŸ“‚ Article πŸ“… 2008 πŸ› John Wiley and Sons 🌐 English βš– 262 KB

## Abstract Carbon–carbon coupling reactions were carried out by using the triphenylbismuth(V) derivatives Ph~3~BiX~2~ (X = O~2~CH, O~2~CMe, O~2~CEt, O~2~C__n__Pr, O~2~C__n__Bu, O~2~C__t__Bu, O~2~CPh, O~2~CCH~2~Cl, O~2~CCCl~3~, O~2~CCF~3~) and a variety of olefins in the presence of palladium nanop