Visible Light and Sunlight Photoinduced ATRP with ppm of Cu Catalyst

被引：517

作者：

Konkolewicz, Dominik ^{[1
]}

Schroeder, Kristin ^{[1
]}

Buback, Johannes ^{[1
]}

Bernhard, Stefan ^{[1
]}

Matyjaszewski, Krzysztof ^{[1
]}

机构：

[1] Carnegie Mellon Univ, Dept Chem, Pittsburgh, PA 15213 USA

来源：

ACS MACRO LETTERS | 2012年 / 1卷 / 10期

基金：

美国国家科学基金会; 美国安德鲁·梅隆基金会;

关键词：

TRANSFER RADICAL POLYMERIZATION; METHYL-METHACRYLATE; PHOTOREDOX CHEMISTRY; FUNCTIONAL MATERIALS; REDUCING AGENTS; ARGET ATRP; COMPLEXES; POLYMERS; PERSPECTIVES; LIGANDS;

D O I：

10.1021/mz300457e

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Photochemically induced ATRP was performed with visible light and sunlight in the presence of parts per million (ppm) copper catalysts. Illumination of the reaction mixture yielded polymerization in case of 392 and 450 nm light but not for 631 nm light. Sunlight was also a viable source for the photoinduced ATRP. Control experiments suggest photoreduction of the Cu-II complex (ligand to metal charge transfer in the excited state), yielding a Cu-I complex, and a bromine radical that can initiate polymerization. No photo-activation of Cu-I complex was detected. This implies that the mechanism of ATRP in the presence of light is a hybrid of ICAR and ARGET ATRP. The method was also used to synthesize block copolymers and polymerizations in water.

引用

页码：1219 / 1223

页数：5

共 59 条

[1] Thermodynamic Properties of Copper Complexes Used as Catalysts in Atom Transfer Radical Polymerization [J].