Relative merits of rCWA and XiX heteronuclear spin decoupling in solid-state magic-angle-spinning NMR spectroscopy: A bimodal Floquet analysis

被引：7

作者：

Equbal, Asif ^{[1
]}

Leskes, Michal ^{[2
]}

Nielsen, Niels Chr. ^{[1
]}

Madhu, P. K. ^{[3
,4
]}

Vega, Shimon ^{[5
]}

机构：

[1] Aarhus Univ, Interdisciplinary Nanosci Ctr iNANO, Ctr Insoluble Prot Struct, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark

[2] Weizmann Inst Sci, Dept Mat & Interfaces, IL-76100 Rehovot, Israel

[3] Tata Inst Fundamental Res, Dept Chem Sci, Homi Bhabha Rd, Bombay 400005, Maharashtra, India

[4] TIFR Ctr Interdisciplinary Sci, 21 Brundavan Colony, Hyderabad 500075, Andhra Pradesh, India

[5] Weizmann Inst Sci, Dept Chem Phys, IL-76100 Rehovot, Israel

来源：

JOURNAL OF MAGNETIC RESONANCE | 2016年 / 263卷

基金：

新加坡国家研究基金会;

关键词：

Solid-state NMR; Magic-angle spinning; Heteronuclear dipolar decoupling; rCW decoupling; XiX decoupling; Non-rotor-synchronisation; Bimodal Floquet theory; NUCLEAR-MAGNETIC-RESONANCE; 2-PULSE PHASE-MODULATION; SEQUENCE; SIMULATION; FREQUENCY;

D O I：

10.1016/j.jmr.2015.12.019

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

We present a bimodal Floquet analysis of the recently introduced refocused continuous wave (rCW) solid-state NMR heteronuclear dipolar decoupling method and compare it with the similar looking X-inverse X (XiX) scheme. The description is formulated in the rf interaction frame and is valid for both finite and ideal pi pulse rCW irradiation that forms the refocusing element in the rCW scheme. The effective heteronuclear dipolar coupling Hamiltonian up to first order is described. The analysis delineates the difference between the two sequences to different orders of their Hamiltonians for both diagonal and off-diagonal parts. All the resonance conditions observed in experiments and simulations have been characterised and their influence on residual line broadening is highlighted. The theoretical comparison substantiates the numerical simulations and experimental results to a large extent. (C) 2016 Elsevier Inc. All rights reserved.

引用

页码：55 / 64

页数：10

共 33 条

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