Two-dimensional magic-angle spinning isotropic reconstruction sequences for quadrupolar nuclei.
Two-dimensional magic-angle spinning (triple quantum, single quantum) correlation pulse sequences and phase cycles based on the technique of Frydman and Harwood for the reconstruction of the isotropic spectrum of half-integer spin quadrupolar nuclei broadened to second-order are described. These sequences provide pure absorption mode two-dimensional lineshapes and increased sensitivity. Experimental examples on spin I = 3/2 (87Rb in RbNO3) and I = 5/2 (27Al in NaSi3AlO8) are presented. The isotropic chemical shift and quadrupolar coupling parameters could be obtained from a simple analysis of the triple quantum filtered single quantum magic-angle spinning cross-sections.
Massiot
D
D
Centre de Recherches sur la Physique des Hautes Températures, Orléans, France.
Touzo
B
B
Trumeau
D
D
Coutures
J P
JP
Virlet
J
J
Florian
P
P
Grandinetti
P J
PJ
D000042:Absorption; D000465:Algorithms; D000535:Aluminum / Q000737:chemistry*; D000538:Aluminum Silicates / Q000737:chemistry; D003460:Crystallization; D003461:Crystallography; D007554:Isotopes; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D009566:Nitrates; D012413:Rubidium / Q000737:chemistry*
D000538:Aluminum Silicates; D007554:Isotopes; D009566:Nitrates; D000535:Aluminum; D012413:Rubidium