کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5413770 | 1506638 | 2006 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tracer diffusion of viologen dications in aqueous NaCl, KBr, NaDS, and DTABr solutions
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
Diffusion coefficients have been measured for five viologen halides, i.e., 1,1â²-dimethyl-, diethyl-, dipropyl-, dibutyl-, and diphenyl-4,4â²-bipyridinium chlorides or bromides, whose concentrations are less than 2 Ã 10â 4 M (1 M = 1 mol dmâ 3), in aqueous solutions of 0.1 M NaCl, 0.1 M KBr, 0.04 M sodium dodecyl sulfate (NaDS), and 0.04 M dodecyltrimethylammonium bromide (DTABr) at 298.15 K. The values obtained can be taken as tracer diffusion coefficients of the viologen dications and those in the NaCl and KBr solutions are found to be very close to those of tetraalkylammonium ions in water when compared at the same ionic radius. The degree of association of the viologen dications to the micelles were calculated to be 100% for 0.04 M NaDS in water, larger than 97% for 0.04 M NaDS + 0.1 M NaCl, and less than 6% for 0.04 M DTABr. Some discussions are made for the results with those obtained from the analyses of photoinduced electron-transfer reactions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 125, Issues 2â3, 15 April 2006, Pages 147-150
Journal: Journal of Molecular Liquids - Volume 125, Issues 2â3, 15 April 2006, Pages 147-150
نویسندگان
Toshihiro Tominaga, Hiroyasu Ohtaka-Saiki, Yui Nogami, Hiroshi Iwata,