iMELO and SPC-5 DQ filters

MELO and SPC-5 DQ filter efficiencies (pulse sequences and simulations)

iMELO main input file

****** The System *******
spectrometer(MHz)  400
spinning_freq(kHz) 10.0
channels           C13
nuclei             C13 C13
atomic_coords      4
cs_isotropic       *
csa_parameters     1 70 0.8  0 60 0 ppm
csa_parameters     2 70 0.8 30 90 0 ppm
j_coupling         *
quadrupole         *
dip_switchboard    *
csa_switchboard    *
exchange_nuclei    *
bond_len_nuclei    *
bond_ang_nuclei    *
tors_ang_nuclei    *
groups_nuclei      *
*** i-MELO = R1 R2 R1 R2 R3 R4 R3 R4 R2 R1 R2 R1 R4 R3 R4 R3
CHN 1
timing(usec)      (imelo.pp)11  (imelo.pp)11  0.5
power(kHz)         *             *            500
phase(deg)         *             *            90
freq_offs(kHz)     *             *            0
phase_cycling      *             1234         *   3131(RCV)
******* Variables **********************************

** Create imelo.pp
R[1:4] = load( "R" & str([1:4]) )
imelo = R1; R2; R1; R2; R3; R4; R3; R4; R2; R1; R2; R1; R4; R3; R4; R3
save(imelo,"imelo.pp")

spinning_freq=9
psf_1_[1 2]=0.09*spinning_freq
tsf_[1 2]=1/psf_1_1

******* Options *************************************
rho0               F1z
observables        I1p
EulerAngles        rep168
n_gamma            9
line_broaden(Hz)   *
zerofill           *
FFT_dimensions     *
options            -re -dw1 -py

 

Alternative version of iMELO (using explicit coherence selction)

****** The System *******
spectrometer(MHz)  400
spinning_freq(kHz) 10.0
channels           C13
nuclei             C13 C13
atomic_coords      4
cs_isotropic       *
csa_parameters     1 70 0.8  0 60 0 ppm
csa_parameters     2 70 0.8 30 90 0 ppm
j_coupling         *
quadrupole         *
dip_switchboard    *
csa_switchboard    *
exchange_nuclei    *
bond_len_nuclei    *
bond_ang_nuclei    *
tors_ang_nuclei    *
groups_nuclei      *
*** i-MELO = R1 R2 R1 R2 R3 R4 R3 R4 R2 R1 R2 R1 R4 R3 R4 R3
CHN 1
timing(usec)      (imelo.pp)11  0  (imelo.pp)11   0.5
power(kHz)         *            0   *             500
phase(deg)         *            0   *             -90
freq_offs(kHz)     *            0   *               0
******* Variables **********************************
spinning_freq=9
psf_1_[1 3]=0.09*spinning_freq
tsf_[1 3]=1/psf_1_1
select_2=["2 -2"]
******* Options *************************************
rho0               F1z
observables        I1p
EulerAngles        rep168
n_gamma            9
line_broaden(Hz)   *
zerofill           *
FFT_dimensions     *
options            -re -dw1 -py -refimelo

 

SPC-5 input file

****** The System *******
spectrometer(MHz)  400
spinning_freq(kHz) 10.0
channels           C13
nuclei             C13 C13
atomic_coords      4
cs_isotropic       *
csa_parameters     1 70 0.8  0 60 0 ppm
csa_parameters     2 70 0.8 30 90 0 ppm
j_coupling         *
quadrupole         *
dip_switchboard    *
csa_switchboard    *
exchange_nuclei    *
bond_len_nuclei    *
bond_ang_nuclei    *
tors_ang_nuclei    *
groups_nuclei      *
******* Pulse Sequence ******************************
CHN 1
timing(usec)      (spc5.pp)41    (spc5.pp)41    0.5
power(kHz)          *              *            500
phase(deg)          *              *            90
freq_offs(kHz)      *              *            0
phase_cycling       *             1234          *   3131(RCV)
******* Variables **********************************

spinning_freq=9
psf_1_[1 2]=0.1*spinning_freq
tsf_[1 2]=1/psf_1_1

** Turn on/off the CSA
scan_par csa/0 1/
csa_swb_[1 2]_1 = csa
csa_swb_[1 2]_2 = csa

** Set up the Figure
legend_labels = "'SPC-5 no CSA', 'SPC-5 70 ppm CSA'"
y_label = "DQ filtering efficiency"
fig_title = "SPC-5"
fig_options = f"--text 0.6,0.4,'$^1$H 400 MHz    $\omega_R/2\pi=9$ kHz[nl]$^{13}$C$-^{13}$C pair    $r=4$ Å' --esize 8"

******* Options *************************************
rho0               F1z
observables        I1p
EulerAngles        rep168
n_gamma            20
line_broaden(Hz)   *
zerofill           *
FFT_dimensions     *
options            -re -dw1 -py

spc5.pp

5   50  0   0
20  50  180 0
15  50  0   0
5   50  72  0
20  50 -108 0
15  50  72  0
5   50  144 0
20  50 -36  0
15  50  144 0
5   50  216 0
20  50  36  0
15  50  216 0
5   50  288 0
20  50  108 0
15  50  288 0
5   50  180 0
20  50  0   0
15  50  180 0
5   50 -108 0
20  50  72  0
15  50 -108 0
5   50 -36  0
20  50  144 0
15  50 -36  0
5   50  36  0
20  50  216 0
15  50  36  0
5   50  108 0
20  50  288 0
15  50  108 0