کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5420686 | 1507514 | 2008 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of local environments in crystalline borophosphates using single and double resonance NMR
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
11B and 31P magic-angle spinning as well as 11B{31P} and 31P{11B} rotational echo double resonance (REDOR) NMR have been applied to characterize the local environments in the crystalline borophosphates K3[BP3O9(OH)3], NH4[ZnBP2O8] and Rb3[B2P3O11(OH)2]. Dipolar second moment values extracted from the REDOR curves at short evolution times (ÎS/S0⩽0.2) are in reasonable agreement with those calculated from the internuclear distances in the corresponding crystal structures. In particular, the method is found to be useful for distinguishing between boron and phosphorus local environments with different numbers of B-O-P connectivities, making REDOR a well-suited tool for medium-range order investigations in glasses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Nuclear Magnetic Resonance - Volume 34, Issues 1â2, JulyâSeptember 2008, Pages 20-31
Journal: Solid State Nuclear Magnetic Resonance - Volume 34, Issues 1â2, JulyâSeptember 2008, Pages 20-31
نویسندگان
Devidas B. Raskar, Hellmut Eckert, Bastian Ewald, Rüdiger Kniep,