Effect of Surfactants on the Belousov-Zhabotinsky Reaction with Ninhydrin as Organic Substrate
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Sukanya Mondal
Abstract
The effects of sodium dodecyl sulfate (SDS), cetyltrimethylammonium bromide (CTAB) and Brij 35 on the oscillations of the cerium-catalyzed Belousov-Zhabotinsky (B-Z) reaction with ninhydrin as the organic substrate at 30 °C were described by following the change in absorbance of the reaction mixtures at 357 nm. The behavior of the oscillatory parameters was determined: (i) the induction period (IP) increases first and then decreases with increasing the concentration of all used surfactants (ii) the number of oscillations decreases with the SDS concentration, while for Brij 35 and CTAB it remains nearly constant, and (iii) the mean amplitude of the oscillations decreases with increasing concentration of CTAB and SDS, while it varies irregularly with that of Brij 35. The ability of micelles to selectively shield ions and molecules may explain their effect on the oscillation parameters of the studied B-Z system.
Kurzfassung
Die Auswirkungen von Natriumdodecylsulfat (SDS), Cetyltrimethylammoniumbromid (CTAB) und Brij 35 auf die Oszillationen der Cer-katalysierten Belousov-Zhabotinsky (B-Z)-Reaktion mit Ninhydrin als organischem Substrat bei 30 °C wurden durch die Extinktionsänderung der Reaktionsgemische bei 357 nm beschrieben. Das Verhalten der oszillatorischen Parameter wurde bestimmt: So nimmt (i) die Induktionsperiode (IP) zuerst zu und dann mit steigender Konzentration aller verwendeten Tenside ab, (ii) die Anzahl der Oszillationen nimmt mit der SDS-Konzentration ab, während sie mit Brij 35 und CTAB nahezu konstant bleibt und (iii) nimmt die mittlere Amplitude der Oszillationen mit steigender Konzentration von CTAB und SDS ab, während sie unregelmäßig mit der von Brij 35 variiert. Die Fähigkeit von Mizellen, Ionen und Moleküle selektiv abzuschirmen, kann ihren Einfluss auf die Oszillationsparameter des untersuchten BZ-Systems erklären.
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- Influence of Cationic Surfactant and Temperature on the Growth of ZnO Nanoparticles
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- Improved Synthesis and Properties of N-(3-octadecylamino-2-hydroxyl) Propyl Trimethyl Ammonium Chloride
- Influence of the Hydro/Fluorocarbon Chain Length on CMC and HLB of Surface-Active Nonionic Surfactants Containing Polyethylene Glycol Groups
- Application
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Articles in the same Issue
- Contents/Inhalt
- Contents
- Physical Chemistry
- Morphologic Properties, Texture Transformations and Optical Refracting Properties: Aqueous Bicomponent Amphiphilic Lyotropic Systems
- Influence of Cationic Surfactant and Temperature on the Growth of ZnO Nanoparticles
- Effect of Surfactants on the Belousov-Zhabotinsky Reaction with Ninhydrin as Organic Substrate
- Solubility of Some Mineral Salts in Polyethylene Glycol and Related Surfactants
- Novel Surfactants
- Solubility Enhancement of Polycyclic Aromatic Hydrocarbons by an Eco-Friendly Ester-Linked Gemini Surfactant and its Mixtures with Conventional Surfactants
- Novel Carbohydrate Based Non-Ionic Gemini Surfactants with Flexible Spacer as Reverse Micellar Systems for Encapsulation of D- and L-Enantiomers of Some Aromatic α-Amino Acids in n-Hexane
- Synthesis and Characterization of Photosensitive Ionic Liquid Surfactant 4-Butylazobenzene-4′-(Oxyethyl)Methylimidazolium with Br− and BF4− Counterions
- Synthesis
- Improved Synthesis and Properties of N-(3-octadecylamino-2-hydroxyl) Propyl Trimethyl Ammonium Chloride
- Influence of the Hydro/Fluorocarbon Chain Length on CMC and HLB of Surface-Active Nonionic Surfactants Containing Polyethylene Glycol Groups
- Application
- Ultra-Low Interfacial Tension of a Surfactant under a Wide Range of Temperature and Salinity Conditions for Chemical Enhanced Oil Recovery
