کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
601668 879950 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Toluidine blue: Aggregation properties and distribution behavior in surfactin micelle solution
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Toluidine blue: Aggregation properties and distribution behavior in surfactin micelle solution
چکیده انگلیسی

Aggregation properties and distribution behavior of toluidine blue in surfactin solution have been investigated by UV, infrared spectrum and fluorescence measurements. The UV measurement indicates that the location of toluidine blue can facilitate the formation of toluidine blue aggregates in contrast to that in the absence of surfactin. The fluorescence results show that the micropolarity of pyrene initially increases and then decreases with the addition of toluidine blue molecules. The binding constants of toluidine blue with surfactin micelles and the distribution coefficients between the micelles phase and the aqueous phase have been calculated by Benesi–Hildebrand method and pseudo-phase model, respectively. The values of ΔH° < 0 (−22.11 kJ/mol) and ΔS° > 0 (12.58 ± 0.07 J/(mol K)) show that electrostatic attractive interaction plays an important role in the location of toluidine blue in surfactin micelles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces B: Biointerfaces - Volume 75, Issue 2, 1 February 2010, Pages 496–500
نویسندگان
, , ,