Two-pulse nutation NMR
applied to a crystal:
JDK1.1.8 applet

Home and Applets > Two Pulses > JDK1.1.8 Java Applets for Single Crystal

AIM: Determination of the quadrupole coupling from a featureless NMR lineshape

Launch the two-pulse applet with Java Web Start.

Two-pulse sequence with a short interpulse delay tau1 for nutation NMR

Two-pulse nutation experiments with a short interpulse delay tau1 are more versatile than one-pulse nutation experiment: We can perform two experiments with different acquisition parameters on the same sample. The fitting of these two nutation data should provide us with the same quadrupolar coupling. A short tau1 avoids the formation of echoes. Three two-pulse sequences are presented:

X-X:
{+X}-tau1-{+X}-acq(+y)

Even-X:
{+X}-tau1-{+X}-acq(+y)
{-X}-tau1-{+X}-acq(+y)

Odd-X:
{+X}-tau1-{+X}-acq(+y)
{-X}-tau1-{+X}-acq(-y)
IMAGE: Parameters for the simulation of two-pulse nutation NMR line intensity

The left part of the panel indicates the parameters of the simulation. It is preset for a typical experiment on a spin I = 3/2. You can introduce your own values.

First, we select one of the two-pulse sequences available with the upper choice box.

Then, we select one of the two types of line intensity calculation with the lower choice box:
(1) V-T-F: p1 is variable and p2 is constant, tau1 being a parameter;
(2) F-T-V: p1 is constant and p2 is variable, tau1 being a parameter.

A constant length should be provided in the MinLength field.

MinLength: the first variable pulse-length in µs

MaxLength: the last variable pulse-length in µs

Step: the increment of the variable pulse-length in µs

The following applet is initialized for the central-line intensity of a spin I = 3/2 in a single crystal excited by the X-X two-pulse sequence, where p1 = 5 µs, tau1 = 10 µs, and p2 increases from 0 to 10 µs by 0.5 µs step. The experimental line intensities are identical to the simulated ones.

Help for selecting all the simulated data of the line intensity text area in a JDK1.1.8 applet.

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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