Difference between revisions of "Hmqc.m"

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Magnitude-mode HMQC pulse sequence. Syntax:
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{{DISPLAYTITLE:hmqc.m}} __NOTOC__
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Magnitude-mode HMQC pulse sequence from https://doi.org/10.1016/0022-2364(83)90241-X.
  
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                fid=hmqc(spin_system,parameters,H,R,K)
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==Syntax==
  
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where H is the hamiltonian commutation superoperator, R is the
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    fid=hmqc(spin_system,parameters,H,R,K)
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relaxation superoperator and K is the chemical kinetics super-
 
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operator. The following parameters are required:
 
  
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parameters.sweep              [F1 F2] sweep widths, Hz
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==Parameters==
  
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  parameters.npoints           [F1 F2] numbers of points
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    parameters.sweep          [F1 F2] sweep widths in each
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                              frequency direction, Hz
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    parameters.npoints       [F1 F2] numbers of points in
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                              each time direction
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    parameters.spins          {F1 F2} nuclei, e.g. {'15N','1H'}
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    parameters.decouple_f2    nuclei to decouple in F2,
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                              e.g. {'15N','13C'}
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    parameters.decouple_f1    nuclei that receive midpoint 180-degree
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                              refocusing pulses in F1, e.g. {'1H'}
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    parameters.J              primary scalar coupling, Hz
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    H - Hamiltonian matrix, received from context function
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    R - relaxation superoperator, received from context function
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    K - kinetics superoperator, received from context function
  
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parameters.spins              {F1 F2} nuclei, e.g. {'15N','1H'}
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==Outputs==
  
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parameters.decouple_f2        nuclei to decouple in F2, e.g. {'15N','13C'}
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    fid - free induction decay for magnitude mode processing
  
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parameters.decouple_f1        nuclei to decouple in F1, e.g. {'1H','13C'}
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==Examples==
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An HMQC spectrum of strychnine (examples/nmr_liquids/hmqc_strychnine.m) appears below.
  
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parameters.J                  primary scalar coupling, Hz
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[[File:hmqc_strychnine.png]]
  
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Note: natural abundance experiments should make use of the isotope dilution functionality. See dilute.m in the kernel.
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==Notes==
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Natural abundance experiments should make use of the isotope dilution functionality. See [[dilute.m]] function.
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==See also==
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[[hsqc.m]], [[cosy.m]], [[hetcor.m]], [[noesy.m]], [[tocsy.m]], [[hnco.m]], [[hncoca.m]], [[roesy.m]], [[dilute.m]], [[clip_hsqc.m]], [[coloc.m]], [[crazed.m]], [[ct_cosy.m]], [[ct_hsqc.m]], [[dept.m]], [[deptq.m]], [[dqf_cosy.m]], [[ecosy.m]], [[hmbc.m]], [[hoesy.m]], [[inadequate.m]], [[inadequate_2d.m]], [[inept.m]], [[inv_rec.m]], [[mqs.m]], [[mqs_refocus.m]], [[pansy_cosy.m]], [[pansy_triple.m]], [[sat_rec.m]], [[Built-in_experiments]]
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''Version 2.3, authors: [[Ilya Kuprov]]''

Latest revision as of 06:49, 30 August 2026

Magnitude-mode HMQC pulse sequence from https://doi.org/10.1016/0022-2364(83)90241-X.

Syntax

   fid=hmqc(spin_system,parameters,H,R,K)

Parameters

   parameters.sweep          [F1 F2] sweep widths in each
                             frequency direction, Hz

   parameters.npoints        [F1 F2] numbers of points in
                             each time direction

   parameters.spins          {F1 F2} nuclei, e.g. {'15N','1H'}

   parameters.decouple_f2    nuclei to decouple in F2, 
                             e.g. {'15N','13C'}

   parameters.decouple_f1    nuclei that receive midpoint 180-degree
                             refocusing pulses in F1, e.g. {'1H'}

   parameters.J              primary scalar coupling, Hz

   H - Hamiltonian matrix, received from context function

   R - relaxation superoperator, received from context function

   K - kinetics superoperator, received from context function

Outputs

   fid - free induction decay for magnitude mode processing

Examples

An HMQC spectrum of strychnine (examples/nmr_liquids/hmqc_strychnine.m) appears below.

Hmqc strychnine.png

Notes

Natural abundance experiments should make use of the isotope dilution functionality. See dilute.m function.

See also

hsqc.m, cosy.m, hetcor.m, noesy.m, tocsy.m, hnco.m, hncoca.m, roesy.m, dilute.m, clip_hsqc.m, coloc.m, crazed.m, ct_cosy.m, ct_hsqc.m, dept.m, deptq.m, dqf_cosy.m, ecosy.m, hmbc.m, hoesy.m, inadequate.m, inadequate_2d.m, inept.m, inv_rec.m, mqs.m, mqs_refocus.m, pansy_cosy.m, pansy_triple.m, sat_rec.m, Built-in_experiments

Version 2.3, authors: Ilya Kuprov