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Mixed anionic and zwitterionic surfactant based microemulsions as vehicles for solubilizing organodiselenides
S K Mehta1, Khushwinder Kaur, Rishu
1Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160 014, India. skmehta@pu.ac.in
Journal of Colloid and Interface Science
|April 28, 2009
Summary
This study explores how organodiselenides affect microemulsions. Organodiselenides were detected at the interface, influencing spectral properties and solubilization, especially in lecithin-containing systems.
Area of Science:
- Physical Chemistry
- Colloid and Surface Science
Background:
- Microemulsions are thermodynamically stable mixtures of oil, water, and surfactant.
- Organodiselenides are organosulfur compounds with potential applications in various chemical processes.
Purpose of the Study:
- To investigate the spectral and physicochemical behavior of water/AOT/isooctane and water/AOT+lecithin/isooctane microemulsions in the presence of organodiselenides.
- To understand the interaction of organodiselenides with microemulsion interfaces and their effect on microemulsion properties.
Main Methods:
- Fourier Transform Infrared (FTIR) spectroscopy to analyze changes in functional group stretching frequencies.
- Acridine Orange (AO) fluorescence spectroscopy to detect organodiselenide presence and assess quenching capacities.
- Determination of micropolarity using the empirical polarity parameter E(T)(30).
- Study of temperature-induced percolation processes.
Main Results:
- FTIR spectra showed changes in OH, CO, and C-O-C stretching frequencies upon organodiselenide addition.
- Acridine Orange interaction confirmed the presence of organodiselenides at the microemulsion interface.
- Micropolarity, measured by E(T)(30), increased with increasing water content (ω).
- Organodiselenides exhibited quenching effects on AO emission spectra.
- Microemulsion II (ME-II) showed higher solubilization capacity for organodiselenides compared to Microemulsion I (ME-I).
Conclusions:
- Organodiselenides interact with and are localized at the microemulsion interface.
- The presence of lecithin in ME-II enhances the solubilization of organodiselenides.
- Microemulsions can be utilized for the solubilization and study of organodiselenides.
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