کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5413612 | 1506632 | 2007 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Alkali chlorides-induced phase separation of acetonitrile-water mixtures studied by small-angle neutron scattering
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Alkali chlorides (MCl, M = Li+, Na+, and K+) -induced phase separation of acetonitrile-water mixtures at 298 K has been investigated. Phase diagrams of acetonitrile-H2O-MCl systems have shown that phase separation of the mixtures occurs at lower salt concentration in the order of NaCl < KCl < LiCl. Phase separation of acetonitrile-D2O-MCl systems takes place in the same order as the acetonitrile-H2O-MCl ones, but the D2O systems are separated at lower concentration of each salt than the H2O systems. To clarify phase separation of acetonitrile-water-MCl mixtures at a mesoscopic scale, small-angle neutron scattering (SANS) experiments have been made on acetonitrile-D2O-MCl mixtures before phase separation as a function of salt concentration. The SANS results in terms of the Ornstein-Zernike correlation length have suggested that D2O clusters are more easily evolved with increasing salt concentration in the order of NaCl > KCl > LiCl, which is in agreement with the order of phase separation. Based on the present results, mechanisms of LiCl-, NaCl-, and KCl-induced phase separation of acetonitrile-water mixtures have been discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volumes 131â132, 15 March 2007, Pages 131-138
Journal: Journal of Molecular Liquids - Volumes 131â132, 15 March 2007, Pages 131-138
نویسندگان
Toshiyuki Takamuku, Yasukuni Noguchi, Eiichi Yoshikawa, Tomomi Kawaguchi, Masaru Matsugami, Toshiya Otomo,