H-aggregation of Methyl Orange at the Interface between the Water Phase and Oil Phase in a Water-in-Oil Microemulsion

Methyl orange dissolved in a water-in-oil microemulsion was examined by UV-VIS absorption spectroscopy and differential scanning calorimetry (DSC). Methyl orange showed two temperature-dependent peaks at 416 and 354 nm in the microemulsion. The former was attributed to a methyl orange monomer, and t...

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Bibliographic Details
Published in:Journal of colloid and interface science 1997-01, Vol.185 (2), p.332-334
Main Authors: Fujieda, Takuya, Ohta, Koji, Wakabayashi, Noboru, Higuchi, Shunichi
Format: Article
Language:English
Subjects:
aggregation
blue shift
Chemistry
Colloidal state and disperse state
Emulsions. Microemulsions. Foams
Exact sciences and technology
General and physical chemistry
methyl orange
microemulsion
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Summary:Methyl orange dissolved in a water-in-oil microemulsion was examined by UV-VIS absorption spectroscopy and differential scanning calorimetry (DSC). Methyl orange showed two temperature-dependent peaks at 416 and 354 nm in the microemulsion. The former was attributed to a methyl orange monomer, and the latter to aggregates of the dye in the parallel orientation (H-aggregates) at the interface between the water phase and the oil phase in the microemulsion. The position of methyl orange in the microemulsion was verified by DSC analysis.
ISSN:0021-9797
1095-7103
DOI:10.1006/jcis.1996.4603