Improved WATERGATE pulse sequences for solvent suppression in NMR spectroscopy
Improved WATERGATE pulse sequences for solvent suppression in NMR spectroscopy
复制标题
DOI：
10.1006/jmre.1998.1405
复制
发表时间：
1998-05-01
影响因子：
2.2
通讯作者：
Lindon, JC
中科院分区：
文献类型：
--
作者：
Liu, ML;Mao, XA;Lindon, JC
提出了对水门方法的修改，用于从 H-1 NMR 谱中消除溶剂共振。在传统的WATERGATE中，使用具有三对对称脉冲的脉冲串，其形式为3 alpha-tau-9 alpha-tau-19 alpha-tau-19 alpha-tau-9 alpha-tau-3 alpha（此处指定为W3），其中26 alpha = 180度，而改进版本分别使用四对和五对对称脉冲（此处指定为W4和W5）。修改后的方法提供了更窄的非反转区域，因此增强了接近水共振的峰的灵敏度。对脉冲串W3、W4和W5的反转和抑制曲线进行了理论和实验比较，得到了很好的一致性。 (C) 1998 年学术出版社。
Modifications to the WATERGATE method for removing the solvent resonance from H-1 NMR spectra are presented. In the conventional WATERGATE, a pulse train with three pairs of symmetric pulses in the form 3 alpha-tau-9 alpha-tau-19 alpha-tau-19 alpha-tau-9 alpha-tau-3 alpha (designated here W3), where 26 alpha = 180 degrees, is used, while the improved versions use four and five pairs of symmetric pulses (designated here W4 and W5), respectively. The modified methods provide narrower noninversion regions and hence enhance the sensitivities of the peaks close to the water resonance. The inversion and suppression profiles of the pulse trains W3, W4, and W5 are compared theoretically and experimentally and good agreement is obtained. (C) 1998 Academic Press.