R14_4^5-1d: 1D double quantum / single quantum correlation R1445 pulse program for TopSpin2.1




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Double-quantum excitation with R14 4^5 pulse sequence

Since non-phase cycling is applied to the R1445 excitation pulse, four-phase cycling is applied to the detection pulse P1 for selecting the 0Q -> -1Q coherence order jump, and four-phase cycling is applied to the R1445 reconversion pulse for filtering DQ coherences.


*** Outline ***


Code for Avance III spectrometers with topSpin2.1 operating system

;r14-4-5_1d (TopSpin 2.0)

;1D DQ excitation sequence R14_4^5
;M. Carravetta, M. Eden, X. Zhao, A. Brinkmann and M.H. Levitt, 
;Symmetry principles for the design of radiofrequency pulse seqeunces in
;the nuclear magnetic resonance of rotating solids, Chem. Phys. Lett 321 (2000) 205-215
;by JOS 02/28/03

;Avance II+ version
;parameters:
;d1  : recycle delay
;d20 : delay between saturation pulses

;p1 : presaturation pulses and detection pulse at power pl1

;pl1  : f1 power level
;pl11 : for R14_4^5 recoupling sequence B1=(N/2n)*cnst31=1.75*cnst31 in Hz

;cnst31 : rotation rate in Hz
;l0  : number of basic R14_4^5 cycles for DQ excitation
;l20 : # of pulses in saturation pulse train, 0 if undesired
;ns  : n*16
;zgoptns :-Dpresat or blank

;$COMMENT=DQ excitation sequence R14_4^5
;$CLASS=Solids
;$DIM=1D
;$TYPE=direct excitation
;$SUBTYPE=homonuclear correlation
;$OWNER=Bruker

define pulse pul180
  "pul180=(2.0s/cnst31)/7"  ;180° pulse

  "d31=1s/cnst31"

;cnst11 : to adjust t=0 for acquisition, if digmod = baseopt
"acqt0=1u*cnst11"

#include <rot_prot.incl>
                ;protect for too slow rotation

  ze                        ;acquire into a cleared memory
1 d31

#ifdef presat               ;set with -Dpresat
pres, d20                   ;delay between saturation pulses
  (p1 pl1 ph1):f1           ;saturation loop if required
  lo to pres times l20
#endif /* presat */

2 d1
  1m rpp11                  ;reset the phase ph11 pointer to the first element
                            ;in the DQ excitation pulse
  1m rpp13                  ;reset the phase ph13 pointer to the first element
                            ;in the DQ reconversion pulse
  1u pl11:f1                ;switch to R14_4^5 RF condition

                            ;R14_4^5 DQ excitation
3 (pul180  ph11 ipp11):f1   ;increment phase ph11 pointer
  (pul180  ph11 ipp11):f1   ;increment phase ph11 pointer
  lo to 3 times l0

                            ;R14_4^5 DQ reconversion
4 (pul180  ph13 ipp13):f1   ;increment phase ph13 pointer
  (pul180  ph13 ipp13):f1   ;increment phase ph13 pointer
  lo to 4 times l0

  (p1 pl1 ph5):f1           ;detection pulse
  2u
  gosc ph31                 ;gosc does not loop to 1

                            ;DQ filtering (four phase cycling):
  1m ip13*16384             ;increments all phases of ph13 by 90°
  lo to 1 times ns          ;next scan

  100m wr #0                ;save data
HaltAcqu, 1m
exit


ph1 = 0                     ;for saturation pulse

ph11=(65536) 11704 53832    ; 64.29°  295.71°  or  64.29°   -64.29°
ph13=(65536) 28088  4680    ;154.29°   25.71°  or  ph11 + 90°

ph5=  0 0 0 0 1 1 1 1 2 2 2 2 3 3 3 3
ph31= 0 2 0 2 1 3 1 3 2 0 2 0 3 1 3 1
  

References

  1. Lena Seyfarth and Jürgen Senker
    An NMR crystallographic approach for the determination of the hydrogen substructure of nitrogen bonded protons,
    Phys. Chem. Chem. Phys. 11, 3522-3531 (2009).
    Abstract
     
  2. M. Carravetta, A. Danquigny, S. Mamone, F. Cuda, O. G. Johannessen, I. Heinmaa, K. Panesar, R. Stern, M. C. Grossel, A. J. Horsewill, A. Samoson, M. Murata, Y. Murata, K. Komatsu, and M. H. Levitt
    Solid-state NMR of endohedral hydrogen-fullerene complexes,
    Phys. Chem. Chem. Phys. 9, 4879-4894 (2007).
    Abstract
     
  3. M. Carravetta, M. Edén, O. G. Johannessen, H. Luthman, P. J. E. Verdegem, J. Lugtenburg, A. Sebald, and M. H. Levitt
    Estimation of carbon-carbon bond lengths and medium-range internuclear distances by solid-state nuclear magnetic resonance,
    J. Am. Chem. Soc. 123, 10628-10638 (2001).
    Abstract
     
  4. Marina Carravetta, Mattias Edén, Xin Zhao, Andreas Brinkmann, and Malcolm H. Levitt
    Symmetry principles for the design of radiofrequency pulse sequences in the nuclear magnetic resonance of rotating solids,
    Chem. Phys. Lett. 321, 205-215 (2000).
    Abstract
     

Other references

  1. Subhradip Paul, Rajendra Singh Thakur, M. H. Levitt, and P. K. Madhu
    1H homonuclear dipolar decoupling using rotor-synchronised pulse sequences: Towards pure absorption phase spectra, (RNnN/2)
    J. Magn. Reson. 205, 269-275 (2010).
    Abstract
     
  2. Mattias Edén
    Two-dimensional MAS NMR correlation protocols involving double-quantum filtering of quadrupolar spin-pairs, (R221; R241)
    J. Magn. Reson. 204, 99-110 (2010).
    Abstract
     
  3. B. Hu, L. Delevoye, O. Lafon, J. Trébosc, and J. P. Amoureux
    Double-quantum NMR spectroscopy of 31P species submitted to very large CSAs, (BR221; BABA-4; SPIP; fp-RFDR)
    J. Magn. Reson. 200, 178-188 (2009).
    Abstract
     
  4. Q. Wang, B. Hu, O. Lafon, J. Trébosc, F. Deng, and J. P. Amoureux
    Double-quantum homonuclear NMR correlation spectroscopy of quadrupolar nuclei subjected to magic-angle spinning and high magnetic field, (BR221; SR221)
    J. Magn. Reson. 200, 251-260 (2009).
    Abstract
     
  5. Mattias Edén and Andy Y. H. Lo
    Supercycled symmetry-based double-quantum dipolar recoupling of quadrupolar spins in MAS NMR: I. Theory, (R221; R241; R442; C120; C241)
    J. Magn. Reson. 200, 267-279 (2009).
    Abstract
     
  6. Jakob J. Lopez, Christoph Kaiser, Sarika Shastri, and Clemens Glaubitz
    Double quantum filtering homonuclear MAS NMR correlation spectra: a tool for membrane protein studies, (R2249)
    J. Biomol. 41, 97-104 (2008).
    Abstract
     
  7. Gregor Mali, Venčeslav Kaučič, and Francis Taulelle
    Measuring distances between half-integer quadrupolar nuclei and detecting relative orientations of quadrupolar and dipolar tensors by double-quantum homonuclear dipolar recoupling nuclear magnetic resonance experiments, (R221)
    J. Chem. Phys. 128, 204503/1-204503/11 (2008).
    Abstract
     
  8. Darren H. Brouwer, Per Eugen Kristiansen, Colin A. Fyfe, and Malcolm H. Levitt
    Symmetry-based 29Si dipolar recoupling magic angle spinning NMR spectroscopy: A new method for investigating three-dimensional structures of zeolite frameworks, (SR26411)
    J. Am. Chem. Soc. 127, 542-543 (2005).
    Abstract
     
  9. Mattias Edén, Hans Annersten, and Ĺsa Zazzi
    Pulse-assisted homonuclear dipolar recoupling of half-integer quadrupolar spins in magic-angle spinning NMR, (R441)
    Chem. Phys. Lett. 410, 24-30 (2005).
    Abstract
     
  10. Per Eugen Kristiansen, Marina Carravetta, Wai Cheu Lai, and Malcolm H. Levitt
    A robust pulse sequence for the determination of small homonuclear dipolar couplings in magic-angle spinning NMR, (SR26411)
    Chem. Phys. Lett. 390, 1-7 (2004).
    Abstract
     
  11. Per Eugen Kristiansen, Dan J. Mitchell, and Jeremy N. S. Evans
    Double-quantum dipolar recoupling at high magic-angle spinning rates, (RN)
    J. Magn. Reson. 157, 253-266 (2002).
    Abstract
     
  12. Andreas Brinkmann, Jörn Schmedt auf der Günne, and Malcolm H. Levitt
    Homonuclear zero-quantum recoupling in fast magic-angle spinning nuclear magnetic resonance, (R662)
    J. Magn. Reson. 156, 79-96 (2002).
    Abstract
     

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Vanadium-51
Xenon-131
Zinc-67
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