Photocleavage of Poly(methyl acrylate) with Centrally Located o-Nitrobenzyl Moiety: Influence of Environment on Kinetics

被引：24

作者：

Lee, Michele E. ^{[1
]}

Gungor, Eda ^{[1
]}

Armani, Andrea M. ^{[1
]}

机构：

[1] Univ So Calif, Mork Family Dept Chem Engn & Mat Sci, Los Angeles, CA 90089 USA

来源：

MACROMOLECULES | 2015年 / 48卷 / 24期

关键词：

PHOTOREMOVABLE PROTECTING GROUPS; REACTION-MECHANISMS; RESPONSIVE POLYMERS; COPOLYMERS BEARING; TRIGGERED RELEASE; SURFACE; LIGHT; HYDROGELS; DELIVERY; LINKERS;

D O I：

10.1021/acs.macromol.5b01496

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We characterized the kinetics of a photo cleavable o-nitrobenzyl (ONB)-modified poly(methyl acrylate) in solution and in film. Using atom transfer radical polymerization, a single photolabile ONB group was incorporated into the center of the polymer chain, resulting in a clearly defined photoresponse. The photocleavage behavior was characterized in three difference solvents and in film, and it was fit to an exponential model. The dependence of the reaction rate constants and quantum efficiency on the interaction :parameter between the solvent and the polymer (chi(12)) and the molecular weight was investigated. Interestingly, as chi(12) decreased, the reaction rate increased and the quantum efficiency increased.

引用

页码：8746 / 8751

页数：6

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