Effects of Thickness and Grafting Density on the Activity of Polymer-Brush-Immobilized Tris(triazolyl) Copper(I) Catalysts

被引：10

作者：

Fernandes, Antony E. ^{[1
]}

Ye, Qian ^{[1
]}

Collard, Laurent ^{[1
]}

Le Duff, Cecile ^{[1
]}

d'Haese, Cecile ^{[1
]}

Deumer, Gladys ^{[2
]}

Haufroid, Vincent ^{[2
]}

Nysten, Bernard ^{[1
]}

Riant, Olivier ^{[1
]}

Jonas, Alain M. ^{[1
]}

机构：

[1] Catholic Univ Louvain, Inst Condensed Matter & Nanosci, B-1348 Louvain La Neuve, Belgium

[2] Catholic Univ Louvain, Louvain Ctr Toxicol & Appl Pharmacol, Inst Rech Expt & Clin, B-1200 Woluwe St Lambert, Belgium

来源：

CHEMCATCHEM | 2015年 / 7卷 / 05期

关键词：

copper; cycloaddition; kinetics; polymers; supported catalysts; AZIDE-ALKYNE CYCLOADDITION; SPHERICAL POLYELECTROLYTE BRUSHES; SURFACE-INITIATED POLYMERIZATIONS; CLICK CHEMISTRY; 1,3-DIPOLAR CYCLOADDITIONS; SUPPORTED; 4-N; N-DIALKYLAMINOPYRIDINE; COVALENT IMMOBILIZATION; RADICAL POLYMERIZATION; ENZYME IMMOBILIZATION; MATERIALS SCIENCE;

D O I：

10.1002/cctc.201402913

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report herein the application of polymer brushes for the immobilization of tris[(1,2,3-triazolyl) methyl] amine CuCl catalysts. Well-defined catalytic brushes were prepared through grafting-from and postpolymerization modification approaches on Si surfaces and characterized by X-ray reflectivity, X-ray photoelectron spectroscopy, and inductively coupled plasma mass spectrometry. Hairy catalysts of varying thickness and grafting density were investigated in a model Cu-I-catalyzed azidealkyne cycloaddition reaction and showed remarkable activity at loadings as low as 0.02 mol% as a result of the unique catalytic site density and nuclearity found in the brush. We demonstrate that thickness and grafting density parameters can be adjusted to maximize catalytic activity along the brush thickness.

引用

页码：856 / 864

页数：9

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