Journal
LANGMUIR
Volume 32, Issue 30, Pages 7606-7612Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.6b02257
Keywords
-
Funding
- Program for Next Generation World-Leading Researchers of the Council for Science and Technology Policy (CSTP) [GR066]
- Japan Society for the Promotion of Science (JSPS) KAKENHI [JP26249116, JP25889039, JPT15K14204, JP16K18279]
- Grants-in-Aid for Scientific Research [26249116, 16K18279] Funding Source: KAKEN
Ask authors/readers for more resources
Oleic acid (OA) and oleates form self-assembled structures dispersible in aqueous media. Herein, the physicochemical properties of OA/oleate assemblies were characterized using fluorescent probes and Raman spectroscopy, under relatively high dilution (< 100 mM of total amphiphile) at 25 degrees C. Anisotropy analysis using 1,6-diphenyl-1,3,5-hexatriene showed that the microviscosity of the OA/oleate assembly was highest at pH 7.5 (the pH range of 6.9=10.6 was investigated). The fluorescence spectra of 6-lauroyl-2-dimethylaminonaphthalene revealed the dehydrated environments on membrane surfaces at pH < 7.7. The pH-dependent Raman peak intensity ratios, chain torsion (S = I-1124/I-1096) and chain packing (R = I-2850/I-2930), showed local maxima, indicating the occurrence of metastable phases, such as dispersed cubic phase (pH = 7.5), vesicle (pH = 8.5), and dispersed cylindrical micelle (pH = 9.7). These results suggest that large-scale OA/oleate assemblies could possess particular membrane properties in a narrow pH region, e.g., at pH 7.5, and 9.7.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available