3Q MAS two-pulse program for Bruker MSL spectrometer
Contributor: J. Virlet

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3QMAS sequence with pulse lengths p1 and p2 for nutation NMR

This is a pulse program for 2-dimensional 3Q-MAS experiment whatever the quadrupolar nuclei with half-integer spin I. The echo position is tau2 = k*tau1 where:

I 3/2 5/2 7/2 9/2
k 7/9 19/12 101/45 91/36

The delay tau1 should be very short, about 10 µs. The pulse lengths p1 and p2 must be optimized in order to obtain the biggest echo amplitude.


Pulse program

    ; VIRLETC.PC
    ; premiere partie de sequence 3Q commune 3Q+ et 3Q-
    PROT ALL
            LOOP C1 TIMES
            10U     ++PLS1
            10U     ++PLS2
            END LOOP

    START,  D1      [F1 @PLS1 RGATE]  : transfer to T33s Iy14
            D4      [         RGATE]
            D2      [F1 @PLS2 RGATE]  ; transfer back to Iy23
            D3      [STA RGATE]
            D0      [++PLS1 ++PLS2]
    GOTO START

    BEGIN LISTS
    PLS1,   K0 (0/100)    (0/)   (30/)   (30/)
                 (60/)   (60/)   (90/)   (90/)
                (120/)  (120/)  (150/)  (150/)
                (180/)  (180/)  (210/)  (210/)
                (240/)  (240/)  (270/)  (270/)
                (300/)  (300/)  (330/)  (330/)
    PLS2,   K0 (0/100)  (180/)   (90/)  (270/)
    ;Liste de phases pour 3Q+
    RLS,    X X -Y -Y -X -X Y Y
    END LISTS
  

Acquisition AU program

    ;VIRLET.AUM
    ;AU program to use in conjunction with the VIRLETC.PC sequence
    ;to generate 2D MQ DAS Hypercomplex data sets.
    ;Interleaved simultaneous acquisition in the t1 dimension.
    ;SET NE TO NUMBER OF PAIR OF T1 POINTS, AND NF TO 2*NE

        D4 = 4U

    1   C1 = 0      ;Set C1=2 for cosine type echo.
        ZE
        GO
        WR #1
        IF #1

        C1 = 1      ;Set C1=1 for sine type echo.
        ZE
        GO
        WR #1
        IF #1

        I4          ;Increment t1=D4 and recycle

        IN = 1

        EXIT
  

Solid-state NMR bibliography for:

Aluminum-27
Antimony-121/123
Arsenic-75
Barium-135/137
Beryllium-9
Bismuth-209
Boron-11
Bromine-79/81
Calcium-43
Cesium-133
Chlorine-35/37
Chromium-53
Cobalt-59
Copper-63/65
Deuterium-2
Gallium-69/71
Germanium-73
Gold-197
Hafnium-177/179
Indium-113/115
Iodine-127
Iridium-191/193
Krypton-83
Lanthanum-139
Lithium-7
Magnesium-25
Manganese-55
Mercury-201
Molybdenum-95/97
Neon-21
Nickel-61
Niobium-93
Nitrogen-14
Osmium-189
Oxygen-17
Palladium-105
Potassium-39/41
Rhenium-185/187
Rubidium-85/87
Ruthenium-99/101
Scandium-45
Sodium-23
Strontium-87
Sulfur-33
Tantalum-181
Titanium-47/49
Vanadium-51
Xenon-131
Zinc-67
Zirconium-91
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