کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1250539 970839 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
FT-IR and FT-Raman spectroscopy study of di-urethanesil hybrids doped with Mg(CF3SO3)2
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
FT-IR and FT-Raman spectroscopy study of di-urethanesil hybrids doped with Mg(CF3SO3)2
چکیده انگلیسی

In the present work di-urethane cross-linked poly(oxyethylene) (POE)/siloxane hybrids (di-urethanesils) incorporating magnesium triflate (Mg(CF3SO3)2) with 100 ≥ n ≥ 2 (where n, composition, is the molar ratio of oxyethylene repeat units per Mg2+ ion) have been characterized by Fourier transform infrared and Raman spectroscopy to elucidate the Mg2+/POE, Mg2+/urethane, Mg2+/CF3SO3− and hydrogen bonding interactions. The Mg2+ ions bond to POE chains and to the carbonyl oxygen atoms of the urethane linkages over the whole range of salt content studied. A crystalline POE/Mg(CF3SO3)2 complex of unknown stoichiometry is formed at n = 5. “Free” and weakly coordinated CF3SO3− ions are present in all the materials examined. Contact ion pairs emerge at n ≤ 20 and higher ionic aggregates appear at n ≤ 5.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vibrational Spectroscopy - Volume 57, Issue 2, November 2011, Pages 187–195
نویسندگان
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