Difference between revisions of "Dqf cosy.m"
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parameters.spins nuclei on which the sequence runs, | parameters.spins nuclei on which the sequence runs, | ||
| − | specified as '1H', '13C', etc. | + | specified as {'1H'}, {'13C'}, etc. |
H - Hamiltonian matrix, received from context function | H - Hamiltonian matrix, received from context function | ||
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[[File:dqf_cosy_strychnine.png]] | [[File:dqf_cosy_strychnine.png]] | ||
| + | |||
| + | ==Notes== | ||
| + | The double-quantum filter is implemented as an exact analytical coherence-order projection, not as an explicit phase cycle or finite-gradient selection block. | ||
==See also== | ==See also== | ||
Revision as of 15:49, 5 June 2026
Phase-sensitive double-quantum filtered COSY pulse sequence.
Syntax
fid=dqf_cosy(spin_system,parameters,H,R,K)
Arguments
parameters.sweep sweep width in Hz
parameters.npoints number of points for both dimensions
parameters.spins nuclei on which the sequence runs,
specified as {'1H'}, {'13C'}, etc.
H - Hamiltonian matrix, received from context function
R - relaxation superoperator, received from context function
K - kinetics superoperator, received from context function
Outputs
fid.cos, fid.sin - components of the free induction
decay for hypercomplex processing
Examples
A DQF-COSY spectrum of strychnine (examples/nmr_liquids/dqf_cosy_strychnine.m) appears below.
Notes
The double-quantum filter is implemented as an exact analytical coherence-order projection, not as an explicit phase cycle or finite-gradient selection block.
See also
noesy.m, hsqc.m, hmqc.m, hnco.m, hncoca.m, tocsy.m, roesy.m
Version 2.3, authors: Ilya Kuprov, Luke Edwards
