Journal
JOURNAL OF CHEMICAL THERMODYNAMICS
Volume 57, Issue -, Pages 360-366Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jct.2012.09.018
Keywords
Glycyl dipeptide; Sodium perfluorooctanoate; Density; Conductivity; Fluorescence spectroscopy; UV-vis spectroscopy
Categories
Funding
- National Natural Science Foundation of China [20973158]
Ask authors/readers for more resources
The interactions of glycyl dipeptides (glyglycine, glycyl-L-valine and glycyl-L-leucine) with sodium perfluorooctanoate (SPFO) in aqueous solutions have been investigated by means of density, conductivity, fluorescence spectroscopy, and UV-vis spectroscopy. The standard partial molar volume (V degrees(2,phi)), standard partial molar volume of transfer for dipeptide from water to aqueous SPFO solutions (Delta V-t degrees), partial molar expansibility (E degrees(phi)) and Hepler's constant have been calculated from density data. Electrical conductivity was used to estimate the critical micellar concentration (c(cmc)) and the thermodynamic parameters of micellization of SPFO in aqueous glycyl dipeptide solutions. Effects of temperature and hydrocarbon chain length of the glycyl dipeptides on the volumetric properties of dipeptides and critical micelle concentration (ccmc) of SPFO were examined. The pyrene fluorescence spectra were used to study the change of micropolarity produced by the interactions of SPFO with glycyl dipeptides, and the aggregation behaviour of SPFO. From the results of UV-vis absorption spectra, the binding constant between dipeptide and SPFO above the ccmc was determined. (C) 2012 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available