z-filter 5QMAS pulse program for spins 5/2, 7/2, and 9/2
Contributor: Y. Millot




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Below NMR pulse program describes the z-filter 5QMAS (1D and 2D) experiment with cogwheel phase cycling or nested phase cycling applied to nuclei with 5/2, 7/2, or 9/2 spins.

This NMR pulse program is for Bruker Avance spectrometers.

A pure absorption 2D spectrum is obtained with the shearing transformation.

Code for Avance NMR spectrometers

; 5qzfilter.ym (XWIN-NMR 3.0)
; 01072009

;5Q MAS pulse program for half integer spin nuclei
;ZGOPTNS (zg-options) are:
;  -DQQS5Cog ... used with I=5/2 (ns=60)  Cog60(0,6,17,47)  = Cog60(28,34,45,15)
;  -DQQS7Cog ... used with I=7/2 (ns=80)  Cog80(0,8,1,41)   = Cog80(59,67,60,20)
;  -DQQS9Cog ... used with I=9/2 (ns=100) Cog100(0,10,1,51) = Cog100(74,84,75,25)
;  -DQQS5Nesdig .used with I=5/2 (ns=60)  nested phase cycling with digital receiver
;  -DQQS7Nesdig .used with I=7/2 (ns=80)  nested phase cycling with digital receiver
;  -DQQS579Nes ..used with I=5/2, 7/2 or 9/2 
;                                (ns=100) nested phase cycling with standard receiver

;d1 : recycle delay
;p1 : excitation pulse at pl11
;p2 : conversion pulse at pl11
;p3 : 90 degree selective pulse at pl13
;pl1 : =120 dB
;pl11 : power level for excitation and conversion pulses
;pl13 : power level for selective pulse
;d4 : =20u, delay for z-filter 
;d0 : =3u
;in0 : 1 rotation period for synchronised experiment
;td1 : number of t1-experiments
;FnMODE : States or TPPI
;Shearing use AU program xfshear (FnMode = States) 
;ph30 ph31:r for receiver phase <> kpi/2

  ze                    ; clear memory, new data replace old data,
                        ; switch AD converter to replace mode,
                        ; perform DS before next acquisition,

1 d1                    ; recycle delay,
  10u pl11:f1           ; 10 microsecond delay,
                        ; set high power in f1 channel,
  (p1 ph1):f1           ; high-power excitation pulse,
  d0                    ; delay between pulses, t1 increment,
  (p2 ph2):f1           ; high-power conversion pulse,
  d4  pl13:f1           ; set low power in f1 channel,
  (p3 ph3):f1           ; low-power 90 pulse,
#ifdef QQS5Nesdig
  go=1 ph30 ph31:r      ; instruction must be in that order
                        ; signal acquisition,
                        ; loop to 1, ns times for averaging,
#else
#ifdef QQS7Nesdig
  go=1 ph30 ph31:r      ; instruction must be in that order
                        ; signal acquisition,
                        ; loop to 1, ns times for averaging,
#else
  go=1 ph31             ; signal acquisition,
                        ; loop to 1, ns times for averaging,
#endif
#endif
  d1 mc #0 to 1 F1PH(ip1, id0)
                        ; delay for disk I/O, store signal,
                        ; increase FID number,
                        ; delete memory data,
                        ; increment p1 pulse phase by 360/20 
                        ; for States procedure,
                        ; increment time d0 by in0,
  exit                  ; end of the pulse program

#ifdef QQS5Cog
 ph10= (60)  {0 1 2 3 4 5 6 7 8 9}^10^20^30^40^50
                        ; a series of integer numbers from 0 to 59
 ph1 = (20)   ph10*28   ; excitation pulse phase
 ph2 =        ph10*34   ; conversion pulse phase
 ph3 =        ph10*45   ; 90 selective pulse phase
 ph31=        ph10*15   ; receiver phase : (360/60)*15*m=90*m
#else
#ifdef QQS7Cog
 ph10= (80)  {0 1 2 3 4 5 6 7 8 9}^10^20^30^40^50^60^70
                        ; a series of integer numbers from 0 to 79
 ph1 = (20)   ph10*59   ; excitation pulse phase
 ph2 =        ph10*67   ; conversion pulse phase
 ph3 =        ph10*60   ; 90 selective pulse phase
 ph31=        ph10*20   ; receiver phase : (360/80)*20*m=90*m
#else
#ifdef QQS9Cog
 ph10= (100) {0 1 2 3 4 5 6 7 8 9}^10^20^30^40^50^60^70^80^90
                        ; a series of integer numbers from 0 to 99
 ph1 = (20)   ph10*74   ; excitation pulse phase
 ph2 =        ph10*84   ; conversion pulse phase
 ph3 =        ph10*75   ; 90 selective pulse phase
 ph31=        ph10*25   ; receiver phase : (360/100)*25*m=90*m
#else 
#ifdef QQS5Nesdig
 ph1 = (20)   0 2 4 6 8 10 12 14 16 18
 ph2 =        0
 ph3 = (6)  {{0}*10}^1^2^3^4^5
 ph30=        ph1*5 + ph3
 ph31=        0
#else 
#ifdef QQS7Nesdig
 ph1 = (20)   0 2 4 6 8 10 12 14 16 18
 ph2 =        0
 ph3 = (8)  {{0}*10}^1^2^3^4^5^6^7
 ph30=        ph1*5 + ph3
 ph31=        0
#else
#ifdef QQS579Nes
 ph1 = (20)   0 2 4 6 8 10 12 14 16 18
 ph2 = (10) {{0}*10}^1^2^3^4^5^6^7^8^9
 ph3 =        0
 ph31=        ph1*5 - ph2*5
#endif
#endif
#endif
#endif
#endif
#endif
  

This pulse program remains valid for the third pulse with strong amplitude for better excitation of off-resonance nuclei.

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