Difference between revisions of "Mqs refocus.m"
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{{DISPLAYTITLE:mqs_refocus.m}} __NOTOC__ | {{DISPLAYTITLE:mqs_refocus.m}} __NOTOC__ | ||
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Multiple quantum correlation pulse sequence with refocusing. | Multiple quantum correlation pulse sequence with refocusing. | ||
==Syntax== | ==Syntax== | ||
| − | + | fid=mqs_refocus(spin_system,parameters,H,R,K) | |
==Arguments== | ==Arguments== | ||
| − | + | parameters.sweep [F1 F2] sweep widths (Hz) | |
| − | + | ||
parameters.npoints [F1 F2] numbers of fid points | parameters.npoints [F1 F2] numbers of fid points | ||
| − | + | ||
| − | parameters.spins {F1 F2} nuclei, in this case: | + | parameters.spins {F1 F2} nuclei, in this case: |
| − | {'1H','1H'} | + | {'1H','1H'} |
| − | + | ||
| − | parameters.angle flip angle for the final | + | parameters.angle flip angle for the final |
| − | pulse, radians | + | pulse, radians |
| − | + | ||
| − | parameters.mqorder coherence | + | parameters.mqorder coherence orders to select, |
| − | + | a two-element integer array | |
| − | + | ||
| − | parameters.delay_1 | + | parameters.delay_1 first evolution delay, seconds |
| − | parameters.delay_2 | + | |
| − | + | parameters.delay_2 second evolution delay, seconds | |
| + | |||
| + | parameters.rho0 initial state | ||
| + | |||
| + | parameters.coil detection state | ||
| + | |||
H - Hamiltonian superoperator, provided by the context function | H - Hamiltonian superoperator, provided by the context function | ||
| − | + | ||
R - relaxation superoperator, provided by the context function | R - relaxation superoperator, provided by the context function | ||
| − | + | ||
K - kinetics superoperator, provided by the context function | K - kinetics superoperator, provided by the context function | ||
==Outputs== | ==Outputs== | ||
| − | + | fid - 2D free induction decay for amplitude-mode processing | |
==Examples== | ==Examples== | ||
| + | |||
A SQ/MQ correlation spectrum simulation for a six-spin system (examples/nmr_liquids/mqs_six_spin.m) appears below. | A SQ/MQ correlation spectrum simulation for a six-spin system (examples/nmr_liquids/mqs_six_spin.m) appears below. | ||
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==See also== | ==See also== | ||
| + | |||
[[hsqc.m]], [[hmqc.m]], [[cosy.m]], [[tocsy.m]] | [[hsqc.m]], [[hmqc.m]], [[cosy.m]], [[tocsy.m]] | ||
''Version 2.3, authors: [[Maria Grazia Concilio]]'' | ''Version 2.3, authors: [[Maria Grazia Concilio]]'' | ||
Revision as of 15:06, 5 April 2026
Multiple quantum correlation pulse sequence with refocusing.
Syntax
fid=mqs_refocus(spin_system,parameters,H,R,K)
Arguments
parameters.sweep [F1 F2] sweep widths (Hz)
parameters.npoints [F1 F2] numbers of fid points
parameters.spins {F1 F2} nuclei, in this case:
{'1H','1H'}
parameters.angle flip angle for the final
pulse, radians
parameters.mqorder coherence orders to select,
a two-element integer array
parameters.delay_1 first evolution delay, seconds
parameters.delay_2 second evolution delay, seconds
parameters.rho0 initial state
parameters.coil detection state
H - Hamiltonian superoperator, provided by the context function
R - relaxation superoperator, provided by the context function
K - kinetics superoperator, provided by the context function
Outputs
fid - 2D free induction decay for amplitude-mode processing
Examples
A SQ/MQ correlation spectrum simulation for a six-spin system (examples/nmr_liquids/mqs_six_spin.m) appears below.
See also
hsqc.m, hmqc.m, cosy.m, tocsy.m
Version 2.3, authors: Maria Grazia Concilio
