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Spherical polyelectrolyte brush

Phenylation of styrene, acrylic esters, and acrylamide with Ph3Bi(02CCF3)2 was examined using palladium nanoparticles immobilized in spherical polyelectrolyte brushes (Pd SPB) (Scheme 7) [21], The reaction can be conducted under air, and... [Pg.203]

Ballauff M (2007) Spherical polyelectrolyte brushes. Progr Polym Sd 32 1135-1151... [Pg.72]

Wittemann A, Haupt B, Ballauff M (2003) Adsorption of proteins on spherical polyelectrolyte brushes in aqueous solution. Phys Chem Chem Phys 5 1671-1677... [Pg.158]

Mei Y, Lu Y, Polzer F, Ballauff M, Drechsler M (2007) Catalytic activity of palladium nanoparticles encapsulated in spherical polyelectrolyte brushes and core-shell microgels. Chem Mater 19 1062-1069... [Pg.158]

Sharma G, Mei Y, Lu Y, Ballauff M, Irrgang T, Proch S, Kempe R (2007) Spherical polyelectrolyte brushes as carriers for platinum nanoparticles in heterogeneous hydrogenation reactions. J Catal 246 10-14... [Pg.158]

Schrinner M, Polzer F, Mei Y, Lu Y, Haupt B, Ballauff M, Goldel A, Drechsler M, Preussner J, Glatzel U (2007) Mechanism of the formation of amorphous gold nanoparticles within spherical polyelectrolyte brushes. Macromol Chem Phys 208 1542-1547... [Pg.158]

Schrinner M, Proch S, Mei Y, Kempe R, Miyajima N, Ballauff M (2008) Spherical polyelectrolyte brushes synthesis, characterization and application for the oxidation of alcohols. Adv Mater 20 1928-1933... [Pg.159]

Mei Y, Sharma G, Lu Y, Drechsler M, Ballauff M, Irrgang T, Kempe R (2005) High catalytic activity of platinum nanoparticles immobilized on spherical polyelectrolyte brushes. Langmuir 21 12229-12234... [Pg.160]

Lu Y, Wittemann A, Ballauff M (2009) Supramolecular structures generated by spherical polyelectrolyte brushes and their application in catalysis. Macromol Rapid Commun 30 806-815... [Pg.162]

Fig. 14 Schematic representation of a spherical polyelectrolyte brush prepared by the photoemulsion grafting from technique (details see text). The brush consists of a solid polystyrene core and surface-attached strong (PSS) or weak (PAA) polyelectrolyte brush shell (Reprinted from Ref. [71] with permission from the American Physical Society)... Fig. 14 Schematic representation of a spherical polyelectrolyte brush prepared by the photoemulsion grafting from technique (details see text). The brush consists of a solid polystyrene core and surface-attached strong (PSS) or weak (PAA) polyelectrolyte brush shell (Reprinted from Ref. [71] with permission from the American Physical Society)...
Figure 6.17 Schematic representation of a spherical polyelectrolyte brush in which linear chains of poly(acrylic acid) (PAA) are chemically grafted onto the surface of a colloidal polystyrene (PS) particle. L denotes thickness of the PAA brush. (After Guo and Ballauff, 2000.)... Figure 6.17 Schematic representation of a spherical polyelectrolyte brush in which linear chains of poly(acrylic acid) (PAA) are chemically grafted onto the surface of a colloidal polystyrene (PS) particle. L denotes thickness of the PAA brush. (After Guo and Ballauff, 2000.)...
Rosenfeldt S, Wittemann A, Ballauff M, Breininger E, Bolze J, Dingenouts N. Interaction of proteins with spherical polyelectrolyte brushes in solution as studied by small-angle x-ray scattering. Phys Rev E 2004 70(6). [Pg.10]

Figure 1.1. (a) Stmeture of the spherical polyelectrolyte brushes having cationic polyelectrolyte chains on their surface. The core consists of poly(styrene) and has diameters of approximately 100 nm. The chains are densely grafted to the surface of these cores by a grafting-from technique ( photoemulsion polymerization, cf. Ref. 24). (b) The core-shell microgel particles shown in a schematic fashion The core consists of poly(styrene) (PS) whereas the network consists of poly(iV-isopropylacrylamide) (PNIPA) crosslinked by JVdV -methylenebisacrylamide (BIS). [Pg.2]

SPHERICAL POLYELECTROLYTE BRUSH BASED METALLIC NANOPARTICLES... [Pg.3]

SPHERICAL POLYELECTROLYTE BRUSH BASED METALLIC NANOPARTICLES 9 TABLE 1.2. Heck Reaction Promoted by Pd SPB in Aqueous Media"... [Pg.9]

However, alloy nanoparticles turned out to be fully stable under the same conditions. This finding is corroborated by an analysis of the composite particles before and after catalysis by cryogenic TEM. No change or leaching of the nanoparticles is observed. Moreover, repeated use of the composite particles as catalysts did not lead to a noticeable decrease of catalytic activity. Hence, spherical polyelectrolyte brushes present a system that allows us to generate and to utilize alloy nanoparticles that exhibit properties widely differing from the properties of the respective bulk alloys. [Pg.11]

Here we have reviewed our recent studies on metallic nanoparticles encapsulated in spherical polyelectrolyte brushes and thermosensitive core-shell microgels, respectively. Both polymeric particles present excellent carrier systems for applications in catalysis. The composite systems of metallic nanoparticles and polymeric carrier particles allow us to do green chemistry and conduct chemical reactions in a very efficient way. Moreover, in the case of using microgels as the carrier system, the reactivity of composite particles can be adjusted by the volume transition within the thermosensitive networks. Hence, the present chapter gives clear indications on how carrier systems for metallic nanoparticles should be designed to adjust their catalytic activity. [Pg.20]

Zhen Liu, Xuelian He, Ruihua Cheng, Moris S. Eisen, Minoru Terano, Susannah L. Scott, andBoping Liu, Chromium Catalysts for Ethylene Polymerization and Oligomerization Ayyaz Ahmad, Xiaochi Liu, Li Li, and Xuhong Guo, Progress in Polymer Nanoreactors Spherical Polyelectrolyte Brushes... [Pg.325]

Spherical Polyelectrolyte Brushes as Carriers for Proteins and Enzymes 286... [Pg.265]

Figure 6.18 Schematic description of the method of preparation of spherical polyelectrolyte brushes by photoemulsion polymerization (a) general scheme (b) photodecomposition of initiator HMEM. (After Guo... Figure 6.18 Schematic description of the method of preparation of spherical polyelectrolyte brushes by photoemulsion polymerization (a) general scheme (b) photodecomposition of initiator HMEM. (After Guo...
The capability of combined nanoscale spatial and millisecond time resolution provided by SAXS is clearly revealed by a study involving the absorption of bovine serum albumin (BSA) onto spherical polyelectrolyte brushes (SPB). The experiment also highlighted the requirement of an advanced modeling capability for the complete exploration of the time-resolved SAXS data. The quantity of absorbed protein per brush as a function of time was provided from the radial electron density profile of SPB, which has been previously derived from the time-resolved SAXS intensities. Furthermore, an unexpected subdiffusive motion of proteins in the tethered polyelectrolyte brushes has been revealed. A quantitative explanation of this sub-diffusive mode can be approached in terms of a simple model involving direct motions of proteins enclosed in the effective interaction potential of the polyelectrolyte chains. [Pg.644]

Polymerization of aniline within the confined environment of spherical polyelectrolyte brushes was performed [70]. Encapsulation of aniline monomers inside a NR and controlled delivery of the oxidizing reagent to the reaction volume provide optimal conditions for matrix polymerization. The excellent kinetic stability of the resulting core-shell particles, as well as the high macroscopic conductivity of the respective composite, open up perspectives for novel materials [70]. [Pg.9]

Zhu Z, et al. Preparation of nickel nanoparticles in spherical polyelectrolyte brush nanoreactor and their catalytic activity. Ind Eng Chem Res 2011 50 13848-53. [Pg.13]

See other pages where Spherical polyelectrolyte brush is mentioned: [Pg.200]    [Pg.183]    [Pg.130]    [Pg.108]    [Pg.12]    [Pg.26]    [Pg.404]    [Pg.1]    [Pg.6]    [Pg.10]    [Pg.26]    [Pg.936]    [Pg.240]    [Pg.240]    [Pg.936]    [Pg.372]    [Pg.216]   
See also in sourсe #XX -- [ Pg.130 ]

See also in sourсe #XX -- [ Pg.2 , Pg.6 , Pg.10 , Pg.11 , Pg.20 , Pg.26 ]



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