Free Radical Polymerization Initiated and Controlled by Visible Light Photocatalysis at Ambient Temperature

被引：151

作者：

Zhang, Guan ^{[2
]}

Song, In Young ^{[1
]}

Ahn, Kyo Han ^{[3
]}

Park, Taiho ^{[1
]}

Choi, Wonyong ^{[1
,2
]}

机构：

[1] Pohang Univ Sci & Technol POSTECH, Dept Chem Engn, Pohang 790784, South Korea

[2] Pohang Univ Sci & Technol POSTECH, Sch Environm Sci & Engn, Pohang 790784, South Korea

[3] Pohang Univ Sci & Technol POSTECH, Dept Chem, Pohang 790784, South Korea

来源：

MACROMOLECULES | 2011年 / 44卷 / 19期

关键词：

N-BUTYL METHACRYLATE; METHYL-METHACRYLATE; ELECTRON-TRANSFER; PHOTOINITIATED POLYMERIZATION; CATIONIC-POLYMERIZATION; PHOTOREDOX CATALYSIS; RAFT POLYMERIZATION; ULTRAVIOLET-RADIATION; HIGHLY EFFICIENT; ARGET ATRP;

D O I：

10.1021/ma201546c

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A new method of free radical polymerization is developed on the basis of visible light photocatalysis using Ru(bpy)(3)Cl-2 that initiates and controls the polymerization at ambient temperature. The alpha-haloester and benzylic halide act as radical initiators that can be activated through the Ru(bpy)(3)(+) photoredox cycle under visible light irradiation. Successful free radical polymerizations of various methacrylates were realized using a Xe arc lamp as well as a household fluorescent lamp as light source. The polymerization is initiated with light on and immediately terminated upon turning the light off. In addition, the molecular weight of polymer can be varied by changing the ratio of monomer and initiator. The present photocatalytic method has merits of the mild reaction conditions with weak light irradiation, ambient temperature, and lower catalyst loading, which could be an alternative to the traditional thermal or photo-based free radical initiation methods. It is also advantageous over other photopolymerization methods in that the radical initiator is separated from the photosensitizer.

引用

页码：7594 / 7599

页数：6

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