کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9594254 1395492 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
1H/31P distance determination by solid state NMR in multiple-spin systems
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
1H/31P distance determination by solid state NMR in multiple-spin systems
چکیده انگلیسی
The results of two techniques of dipolar recoupling, REDOR and CPMAS, are compared in the case of a coupled multiple-spin system. A fundamentally different behavior is observed for these two techniques. In REDOR, the terms associated with each interaction S-Ik commute with each other and no truncation takes place so that each addition of spin Ik causes a splitting with its dipolar frequency. In CPMAS, the flip-flop terms of the dipolar Hamiltonian do not commute with the dominant term from the strongly coupled spin pair so that the weak coupling terms from the neighboring spin Ik are effectively truncated by the dominant pair interaction. Spin dynamics calculations are in agreement with the experimental data in a cubane shaped cluster.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Nuclear Magnetic Resonance - Volume 28, Issue 1, July 2005, Pages 50-56
نویسندگان
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