Photoinduced increase in vesicle size and role of photoresponsive malachite green leuconitrile derivative in vesicle fusion

被引:10
作者
Uda, Ryoko M.
Yamashita, Daisuke
Sakurai, Yoshiaki
Kimura, Keiichi
机构
[1] Nara Natl Coll Technol, Dept Chem Engn, Nara 6391080, Japan
[2] Tech Res Inst Osaka Prefecture, Osaka 5941157, Japan
[3] Wakayama Univ, Fac Syst Engn, Dept Appl Chem, Wakayama 640, Japan
关键词
LONG ALKYL CHAIN; AQUEOUS MIXTURES; UNILAMELLAR VESICLES; PHASE-BEHAVIOR; LIPOSOMES; DEPENDENCE; DESTABILIZATION; FLUORESCENCE; PHOTOCONTROL; SURFACTANTS;
D O I
10.1021/la700831z
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The influence of photoirradiation on vesicles containing a Malachite Green leuconitrile derivative carrying a long alkyl chain, affording photogenerated amphiphilicity, was investigated. The photoresponsive Malachite Green leuconitrile derivative was embedded in the vesicle bilayer of two single-tailed amphiphiles with oppositely charged head groups consisting of cetyltrimethylammonium chloride (CTAC) and sodium octyl sulfate (SOS). Transmission electron microscopy, which was used for observing photoinduced structural change in the vesicles, demonstrated that photoirradiation of the vesicles containing the Malachite Green leuconitrile derivative increased the average size of the vesicle diameter from 116 to 243 nm in the [CTAC]/[SOS] = 0.48 system. The mechanism for vesicle enlargement was studied with fluorescent probe molecules. The photoinduced change in the vesicle size can be explained by the destabilization of the vesicle bilayer, which is perturbed by photogenerated amphiphilicity. In addition, it was shown that the fusion process arising from the destabilized bilayer contributed to the increase in vesicle size.
引用
收藏
页码:7936 / 7941
页数:6
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