کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5410066 | 1506553 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Reaction mechanism of diphenylborinic acid with d-fructose in aqueous solution
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The reaction of d-fructose with diphenylborinic acid (Ph2B(OH)), to which d-fructose cannot coordinate tridentately, was kinetically investigated in order to solve the reaction mechanism, and to find a clue to resolve the two-step reaction mechanism of boronic acid (RB(OH)2) with d-fructose. The title reaction was a single-step reaction under the pseudo first-order conditions with large excess d-fructose over Ph2B(OH), which suggests that the reaction of RB(OH)2 with d-fructose consists of the fast formation of a two-coordinate complex followed by the slow formation of a three-coordinate complex. The kinetic reactivity of Ph2B(OH) was considerably higher than that of its conjugate base, diphenylborinate ion (Ph2B(OH)2â). It was shown that Ph2B(OH)2â interacted with CHES buffer to form an outer-sphere complex, whereas no interaction was observed between Ph2B(OH) and CHES buffer. Both the free borinate ion and the restrained borinate ion into the outer-sphere complex react with d-fructose to form the chelate complex via stable binary and ternary outer-sphere complexes, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 217, May 2016, Pages 29-34
Journal: Journal of Molecular Liquids - Volume 217, May 2016, Pages 29-34
نویسندگان
Yukika Sobue, Tomoaki Sugaya, Satoshi Iwatsuki, Msahiko Inamo, Hideo D. Takagi, Akira Odani, Koji Ishihara,