Temperature Distribution in a Solid State NMR Sample Rotor during MAS Experiments
نویسندگان
چکیده
منابع مشابه
Temperature distribution in a solid state NMR sample rotor during MAS experiments.
We investigated temperature distribution in a solid state nuclear magnetic resonance (NMR) sample rotor under magic angle spinning (MAS) experiments by analyzing the (207)Pb chemical shift of solid lead nitrate (Pb(NO3)2). The analysis corrected a mismatch of the temperature dependence of (1)H spin-lattice relaxation time (T1(H)) obtained from different sample positions in the rotor. We prepare...
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The majority of nuclei available for study in solid state Nuclear Magnetic Resonance have half-integer spin I > 1/2, with corresponding electric quadrupole moment. As such, they may couple with a surrounding electric field gradient. This effect produces anisotropic line broadening in spectra for distinct chemical species in polycrystalline solids. In Multiple Quantum Magic Angle Spinning (MQMAS...
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The use of rotor-synchronized Hahn-echo pulse train (RS-HEPT) H decoupling, in a MAS (Magic Angle Spinning) N spin-echo NMR experiment allows the use of longer the spin-echo durations compared to the case when conventional decoupling is applied, hence enabling the accurate determination of very small J couplings down to a few Hz. Here, a thorough numerical analysis of the N spin-echo under RS-H...
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ژورنال
عنوان ژورنال: Analytical Sciences
سال: 2013
ISSN: 0910-6340,1348-2246
DOI: 10.2116/analsci.29.1089