Hebron University Research Journal-A (Natural Sciences) - (مجلة جامعة الخليل للبحوث- أ (العلوم الطبيعيه
The effect of sodium dodecyl sulfate (SDS) micelles on the observed rate constant (kobs) for complex formation of 2-nitroso-1-naphthol (NAPH ) with iron (II) ion (Fe2+) in the presence of 0.02 M NaOH at 25oC was studied at different urea concentrations. Typical saturation behavior was observed at [NAPH] ≥ 0.001 M and [Fe2+] ≥ 0.015 M, which allows the electron transfer rate constant (ket m ) between NAPH and Fe2+ in the micellar pseudophase to be evaluated. The increase in urea concentrat tion from 0.0 to 4.0 M has three effects. It increases ket m from 0.072 to 0.239 s-1, decreases the critical micelle concentration (cmc) from 6.5 to 3.5 mM and increases the NAPH binding constant to SDS micelles (K) from 20 to 170 M-1. At constant SDS concentration, the complex formation constant (KIP) increases with increasing urea concentration.
"Effect of Sodium Dodecyl Sulfate Micelles on Complex Formation of -2Nitroso-1-Naphthol with Iron (II) Ion in Aqueous Urea Solutions,"
Hebron University Research Journal-A (Natural Sciences) - (مجلة جامعة الخليل للبحوث- أ (العلوم الطبيعيه: Vol. 4
, Article 2.
Available at: https://digitalcommons.aaru.edu.jo/hujr_a/vol4/iss1/2