Photochemical switching of vesicle formation using an azobenzene-modified surfactant

被引：127

作者：

Sakai, H

Matsumura, A

Yokoyama, S

Saji, T

Abe, M

机构：

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

[2] Sci Univ Tokyo, Inst Colloid & Interface Sci, Shinjuku Ku, Tokyo 1620825, Japan

[3] Kyoritsu Coll Pharm, Minato Ku, Tokyo 1628601, Japan

[4] Tokyo Inst Technol, Dept Appl Chem, Meguro Ku, Tokyo 1528552, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1999年 / 103卷 / 49期

关键词：

D O I：

10.1021/jp9927505

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Formation and disruption of vesicles could be photochemically controlled in aqueous mixtures of a "photo-switchable" azobenzene-modified cationic surfactant (4-butylazobenzene-4'-(oxyethyl)trimethylammonium bromide; AZTMA) and an anionic surfactant (sodium dodecylbenzenesulfonate; SDBS). Vesicles were formed spontaneously in a wide composition range in aqueous trans-AZTMA/SDBS mixtures. AZTMA molecules constituting vesicles underwent reversible trans-cis photoisomerization upon alternate UV and visible-light irradiation. Transmission electron microscopic observations via freeze replica technique demonstrated the disruption of the vesicles into larger aggregates (precipitate) with UV-light irradiation (cis formation) and the following visible-light irradiation (trans formation) resulted in vesicle reformation. Furthermore, the release rate of aqueous compounds encapsulated in vesicles was shown to be photochemically controllable in the present AZTMA/SDBS mixed system.

引用

页码：10737 / 10740

页数：4

共 22 条

[1]

ABE M, 1992, MATER TECHNOL, V10, P275

[2] THE RELATION BETWEEN THE ABSORPTION SPECTRA AND THE CHEMICAL CONSTITUTION OF DYES .25. PHOTOTROPISM AND CIS-TRANS ISOMERISM IN AROMATIC AZO COMPOUNDS [J].