SPAM MQ-MAS references

Below are provided some NMR references about MQ-MAS with SPAM applied to half-integer quadrupole spins. These references contain
(1) the pulse-sequence diagram,
(2) the coherence-transfer pathways,
(3) the phase-cycling,
(4) the receiver-phase relationship.

1. Zhehong Gan, Peter L. Gor’kov, William W. Brey, Paul J. Sideris, and Clare P. Grey
   Enhancing MQMAS of low-γ nuclei by using a high B₁ field balanced probe circuit, (1)(2)
   J. Magn. Reson. 200, 2-5 (2009).
   Abstract
2. Takafumi Takahashi, Koji Kanehashi, Yuichi Shimoikeda, Takahiro Nemoto, and Koji Saito
   Practical comparison of sensitivity and resolution between STMAS and MQMAS for ²⁷Al, (1)(2)(3)
   J. Magn. Reson. 198, 228-235 (2009).
   Abstract
3. T. J. Ball and S. Wimperis
   Use of SPAM and FAM pulses in high-resolution MAS NMR spectroscopy of quadrupolar nuclei,
   J. Magn. Reson. 187, 343-351 (2007).
4. J. W. Wiench, G. Tricot, L. Delevoye, J. Trebosc, J. Frye, L. Montagne, J.-P. Amoureux, and M. Pruski
   SPAM-MQ-HETCOR: an improved method for heteronuclear correlation spectroscopy between quadrupolar and spin-1/2 nuclei in solid-state NMR,
   Phys. Chem. Chem. Phys. 8, 144-150 (2006).
5. J.-P. Amoureux, L. Delevoye, G. Fink, F. Taulelle, A. Flambard, and L. Montagne
   Implementing SPAM into STMAS: a net sensitivity improvement in high-resolution NMR of quadrupolar nuclei,
   J. Magn. Reson. 175, 285-299 (2005).
6. J.-P. Amoureux, A. Flambard, L. Delevoye, and L. Montagne
   A very sensitive high-resolution NMR method for quadrupolar nuclei: SPAM-DQF-STMAS,
   Chem. Commun.3472-3474 (2005).
7. N. Malicki, L. Mafra, A.-A. Quoineaud, J. Rocha, F. Thibault-Starzyk, and C. Fernandez
   Multiplex MQMAS NMR of quadrupolar nuclei, (1)(2)(3)
   Solid State Nucl. Magn. Reson. 28, 13-21 (2005).
8. Z. H. Gan and H. T. Kwak
   Enhancing MQMAS sensitivity using signals from multiple coherence transfer pathways,
   J. Magn. Reson. 168, 346-351 (2004).