A proton-transfer probe of a polymer-water interface. 2-naphthol-labeled poly(isopropyl) acrylamide

被引：6

作者：

LinaresSamaniego, S ^{[1
]}

Tolbert, LM ^{[1
]}

机构：

[1] GEORGIA INST TECHNOL,SCH CHEM & BIOCHEM,ATLANTA,GA 30332

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 1996年 / 118卷 / 41期

关键词：

D O I：

10.1021/ja961915+

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Phase transitions in poly(N-isopropylacrylamide) (PNIPAM) covalently labeled with a 2-naphthol were examined by steady-state and time-resolved spectroscopy. 2-Naphthol undergoes excited-state proton transfer (ESPT) at a rate that is dependent upon water concentration in aqueous solvent systems. Upon conversion to the phase-separated state in naphthol-labeled PNIPAM, the efficiency of excited-state proton transfer diminished, consistent with formation of a globular phase in which exposure of the probe molecules to the water phase was reduced.

引用

页码：9974 / 9979

页数：6

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