Resolution Enhancement in Multiple-Quantum MAS NMR Spectroscopy

@article{Schnell_Spiess_JMagRes_1998, abstract = {Two techniques for resolution and sensitivity enhancement are introduced in multiple-quantum (MQ) MAS spectroscopy of rigid solids. The first makes use of ultrafast MAS with spinning frequencies of up to 35 kHz, while the second combines MAS at moderately fast spinning frequencies of about 13 kHz with multiple-pulse (MP) dipolar decoupling. For the latter approach, a semiwindowless WHH-4 sequence is applied during the MQ evolution period (MQ dimension) and/or detection period (single-quantum dimension). In the MQ dimension, the MP sequence has to be supplemented by two bracketing pulses in order to preserve the order and the intensities of the evolving MQ coherences. Double-quantum1H NMR spectra of-alanine recorded using both decoupling techniques are shown and compared to each other. Triple-quantum1H NMR spectra under ultrafast MAS conditions are also presented.}, author = {Schnell, Ingo and Lupulescu, Adonis and Hafner, Siegfried and Demco, Dan E. and Spiess, Hans W. }, citeulike-article-id = {3001934}, doi = {http://dx.doi.org/10.1006/jmre.1998.1432}, journal = {Journal of Magnetic Resonance}, keywords = {1h\_ssnmr, alanine, amino\_acids, cshift, homonuclear\_dipolar\_recoupling}, month = {July}, number = {1}, pages = {61--69}, posted-at = {2008-07-15 11:26:40}, priority = {0}, title = {Resolution Enhancement in Multiple-Quantum MAS NMR Spectroscopy}, url = {http://dx.doi.org/10.1006/jmre.1998.1432}, volume = {133}, year = {1998} }

TY - JOUR ID - Schnell_Spiess_JMagRes_1998 L3 - citeulike-article-id:3001934 N2 - Two techniques for resolution and sensitivity enhancement are introduced in multiple-quantum (MQ) MAS spectroscopy of rigid solids. The first makes use of ultrafast MAS with spinning frequencies of up to 35 kHz, while the second combines MAS at moderately fast spinning frequencies of about 13 kHz with multiple-pulse (MP) dipolar decoupling. For the latter approach, a semiwindowless WHH-4 sequence is applied during the MQ evolution period (MQ dimension) and/or detection period (single-quantum dimension). In the MQ dimension, the MP sequence has to be supplemented by two bracketing pulses in order to preserve the order and the intensities of the evolving MQ coherences. Double-quantum1H NMR spectra of-alanine recorded using both decoupling techniques are shown and compared to each other. Triple-quantum1H NMR spectra under ultrafast MAS conditions are also presented. IS - 1 JF - Journal of Magnetic Resonance EP - 69 TI - Resolution Enhancement in Multiple-Quantum MAS NMR Spectroscopy VL - 133 SP - 61 KW - 1h_ssnmr KW - alanine KW - amino_acids KW - cshift KW - homonuclear_dipolar_recoupling AU - Schnell, Ingo AU - Lupulescu, Adonis AU - Hafner, Siegfried AU - Demco, Dan AU - Spiess, Hans PY - 1998/07// UR - http://dx.doi.org/10.1006/jmre.1998.1432 ER -