Photoinduced reversible change of fluid viscosity

被引：160

作者：

Sakai, H

Orihara, Y

Kodashima, H

Matsumura, A

Ohkubo, T

Tsuchiya, K

Abe, M

机构：

[1] Tokyo Univ Sci, Fac Sci & Technol, Noda, Chiba 2788510, Japan

[2] Tokyo Univ Sci, Inst Colloid & Interface Sci, Shinjuku Ku, Tokyo 1628601, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2005年 / 127卷 / 39期

关键词：

D O I：

10.1021/ja053323+

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report a reversible photoinduced fluid viscosity change. A small amount of a "photoswitchable" azobenzene-modified cationic surfactant (4-butylazobenzene-4′-(oxyethyl)trimethylammonium bromide, AZTMA) was added to a wormlike micellar solution of cetyltrimethylammonium bromide (CTAB) containing sodium salicylate (NaSal). The trans-AZTMA solution had a remarkably high viscosity as a result of the entangled network of wormlike micelles. UV light irradiation on the trans-AZTMA solution remarkably decreased the viscosity of the solution because the bulky structure of cis-AZTMA is likely to disrupt the network structure of wormlike micelles. This photoinduced viscosity change is perfectly reversible between the trans- and cis-AZTMA solutions. Copyright © 2005 American Chemical Society.

引用

页码：13454 / 13455

页数：2

共 21 条

[1] A molecular-thermodynamic model for Gibbs monolayers formed from redox-active surfactants at the surfaces of aqueous solutions: Redox-induced changes in surface tension [J].