Solid-state NMR studies of 17O-enriched pyrophosphates.
نویسندگان
چکیده
For the first time, 17O NMR studies were performed on 17O-enriched crystalline pyrophosphates (magnesium-, sodium- and barium-pyrophosphate) by means of triple-quantum magic-angle spinning (3QMAS) and double-rotation (DOR) in the high external field of 17.6 T. Oxygen atoms in bridging positions (P-OB-P) exhibit a significant higher quadrupole coupling constant compared to oxygen atoms in terminal positions (P-OT). With increasing cationic radius a higher value of the chemical shift of the terminal oxygen atoms is observed.
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ورودعنوان ژورنال:
- Solid state nuclear magnetic resonance
دوره 30 2 شماره
صفحات -
تاریخ انتشار 2006