Heteronuclear Broadband Spin-Flip Decoupling with Adiabatic Pulses
Heteronuclear Broadband Spin-Flip Decoupling with Adiabatic Pulses
复制标题
绝热脉冲异核宽带自旋翻转解耦
DOI：
10.1006/jmra.1994.1043
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
K. Bartusek
中科院分区：
文献类型：
--
作者：
Z. Starčuk;K. Bartusek
本文描述了绝热脉冲在异核宽带解耦中的应用。结果表明，即使在连续的脉冲之间插入无激励间隔，也可以获得较好的循环性。由于这一特点，与标准的连续辐照去耦合技术相比，样品加热可以大大减少，同时获得了对射频场不均匀的低灵敏度的好处。峰值功率要求不仅取决于去耦合带宽，而且还取决于所使用的绝热脉冲的参数。一般而言，它们符合Waltz-16宽带去耦合的功率要求。给出了适用于给定应用的脉冲选择的建议。骑行边带的强度是这种方法的主要权衡。对这种强度的定量评估显示了脉冲重复周期的极限。描述了在200 MHz光谱仪上的实验验证。
Abstract The application of adiabatic pulses for heteronuclear broadband decoupling is described. It is shown that superior cyclicity can be achieved even when excitation-free intervals are inserted between successive pulses. Thanks to this feature, sample heating can be considerably reduced in comparison with the standard decoupling techniques with continuous irradiation, while the benefit of low sensitivity to RF field inhomogeneity is obtained. The peak power requirements depend not only on the decoupling bandwidth, but also on the parameters of the adiabatic pulses used. Generally, they correspond to the power requirements of broadband decoupling by WALTZ-16. Recommendations for the choice of a pulse suitable for a given application are presented. The intensity of cycling sidebands is the main trade-off of this method. Quantitative assessment of this intensity shows the limits for the pulse repetition period. Experimental verification on a 200 MHz spectrometer is described.