Refocusing pulses: A strategy to improve efficiency of phase-modulated heteronuclear decoupling schemes in MAS solid-state NMR.
作者： Mukul G. Jain , K.N. Sreedevi , Asif Equbal , P.K. Madhu , Vipin Agarwal
DOI: 10.1016/J.JMR.2017.09.010
关键词:
摘要: The strategy of using π pulses in conjunction with continuous-wave radio-frequency fields to refocus spin interactions has lead robust and efficient family heteronuclear decoupling schemes magic-angle spinning solid-state NMR, denoted as, rCW schemes. Here, we investigate the generality application such refocussing other phase-modulated schemes, notably super-cycled XiX decoupling. is a commonly used scheme under conditions fast MAS low-amplitude irradiation. achieved by inserting phase 135° supercycled scheme. refocussed XiX, rXiX, improved efficiency, better offset tolerance, easier experimental setup compared
sci-hub.se 参考文章(37)
Rajendra Singh Thakur, Narayanan D. Kurur, P.K. Madhu, Swept-frequency two-pulse phase modulation for heteronuclear dipolar decoupling in solid-state NMR Chemical Physics Letters. ,vol. 426, pp. 459- 463 ,(2006) , 10.1016/J.CPLETT.2006.06.007
Matthias Ernst, Ago Samoson, Beat H Meier, Low-power decoupling in fast magic-angle spinning NMR Chemical Physics Letters. ,vol. 348, pp. 293- 302 ,(2001) , 10.1016/S0009-2614(01)01115-0
K. Takegoshi, Jun Mizokami, Takehiko Terao, 1H decoupling with third averaging in solid NMR Chemical Physics Letters. ,vol. 341, pp. 540- 544 ,(2001) , 10.1016/S0009-2614(01)00525-5
B.M. Fung, A.K. Khitrin, Konstantin Ermolaev, An Improved Broadband Decoupling Sequence for Liquid Crystals and Solids Journal of Magnetic Resonance. ,vol. 142, pp. 97- 101 ,(2000) , 10.1006/JMRE.1999.1896
Arnold L. Bloom, James N. Shoolery, Effects of Perturbing Radiofrequency Fields on Nuclear Spin Coupling Physical Review. ,vol. 97, pp. 1261- 1265 ,(1955) , 10.1103/PHYSREV.97.1261
Michal Leskes, Rajendra Singh Thakur, P. K. Madhu, Narayanan D. Kurur, Shimon Vega, Bimodal Floquet description of heteronuclear dipolar decoupling in solid-state nuclear magnetic resonance. Journal of Chemical Physics. ,vol. 127, pp. 024501- 024501 ,(2007) , 10.1063/1.2746039
Venus Singh Mithu, Perunthiruthy K. Madhu, Exploring connections between phase-modulated heteronuclear dipolar decoupling schemes in solid-state NMR Chemical Physics Letters. ,vol. 556, pp. 325- 329 ,(2013) , 10.1016/J.CPLETT.2012.11.016
Mattias Edén, Malcolm H. Levitt, Pulse sequence symmetries in the nuclear magnetic resonance of spinning solids: Application to heteronuclear decoupling The Journal of Chemical Physics. ,vol. 111, pp. 1511- 1519 ,(1999) , 10.1063/1.479410
Asif Equbal, Subhradip Paul, Venus Singh Mithu, P.K. Madhu, Niels Chr. Nielsen, Efficient heteronuclear decoupling in MAS solid-state NMR using non-rotor-synchronized rCW irradiation. Journal of Magnetic Resonance. ,vol. 246, pp. 104- 109 ,(2014) , 10.1016/J.JMR.2014.07.006
Venus Singh Mithu, Subhradip Paul, Narayanan D. Kurur, P.K. Madhu, Heteronuclear dipolar decoupling in solid-state nuclear magnetic resonance under ultra-high magic-angle spinning. Journal of Magnetic Resonance. ,vol. 209, pp. 359- 363 ,(2011) , 10.1016/J.JMR.2011.01.028