Photoinduced reversible change of fluid viscosity

Hideki Sakai; Yoichi Orihara; Hideki Kodashima; Atsutoshi Matsumura; Takahiro Ohkubo; Koji Tsuchiya; Masahiko Abe

doi:10.1021/ja053323+

Photoinduced reversible change of fluid viscosity

Hideki Sakai, Yoichi Orihara, Hideki Kodashima, Atsutoshi Matsumura, Takahiro Ohkubo, Koji Tsuchiya, Masahiko Abe

Research output: Contribution to journal › Article › peer-review

158 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	13454-13455
Number of pages	2
Journal	Journal of the American Chemical Society
Volume	127
Issue number	39
DOIs	https://doi.org/10.1021/ja053323+
Publication status	Published - Oct 5 2005
Externally published	Yes

ASJC Scopus subject areas

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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T1 - Photoinduced reversible change of fluid viscosity

AU - Sakai, Hideki

AU - Orihara, Yoichi

AU - Kodashima, Hideki

AU - Matsumura, Atsutoshi

AU - Ohkubo, Takahiro

AU - Tsuchiya, Koji

AU - Abe, Masahiko

PY - 2005/10/5

Y1 - 2005/10/5

N2 - 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.

AB - 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.

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Photoinduced reversible change of fluid viscosity

Abstract

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