36-phase cycling for two-pulse 3Q-MAS




Home and Applets > Pulse Sequence > Two-Pulse Phase Cycling > 36-Phase Cycling

Two-pulse MQ-MAS with 36-phase cycling

M. Hanaya and R. K. Harris [J. Phys. Chem. A, 101, 1903-1910 (1997)] solved the system of two equations for the receiver phase in the two-pulse, 3Q-MAS sequence:
φrec = +3*φ1 - 2*φ2,
φrec = -3*φ1 + 4*φ2.

(1) 36-phase cycling

The solution to this is both pulse phases take six values: 0, 60, 120, 180, 240, and 300.

φ1 = 0 60 120 180 240 300
φ2 = {0}X6  {60}X6  {120}X6  {180}X6  {240}X6  {300}X6
φrec = {0 180}X3  {240 60}X3  {120 300}X3

Since the receiver phase takes values different from 0, 90, 180, and 270, this 36-phase cycling is applied scarcely [J. Skibsted and H. J. Jakobsen, J. Phys. Chem. A, 103, 7958-7971 (1999)].

(2) Simulation

We provide SIMPSON1.1.1 Tcl scripts for simulating the echo and antiecho amplitude versus a pulse duration:
(1) filtering the coherences,
(2) 36-phase cycling the pulses and the receiver.

Duration Filtering 36-phase cycling
1st-pulse na-filtering-p1 na-36-cycling-p1
2nd-pulse na-filtering-p2 na-36-cycling-p2

(3) Result

When the amplitudes are normalized to the number of phase cycling, these two approaches provide the same simulation data about echo and antiecho amplitude for spin I = 3/2, 5/2, and 7/2 systems.

 

(top)

[Contact me] - Last updated December 15, 2012
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



Copyright 2002- pascal-man.com. All rights reserved.