用于增强31P固态MAS和27Al --> 31P MQHETCOR NMR分辨率的双共振去耦
Double-resonance decoupling for resolution enhancement of 31P solid-state MAS and 27Al --> 31P MQHETCOR NMR.
作者信息
Delevoye Laurent, Fernandez Christian, Morais Cláudia M, Amoureux Jean-Paul, Montouillout Valérie, Rocha João
机构信息
Laboratoire d'Applications, RMN, Bruker BioSpin SA, 34, rue de l'Industrie, 67166 Wissembourg, France.
出版信息
Solid State Nucl Magn Reson. 2002 Dec;22(4):501-12. doi: 10.1006/snmr.2002.0080.
27Al decoupling has been used to remove residual J-coupling interactions between 31P and 27Al in microporous aluminophosphates AlPO4-14 and AlPO4-40. In combination with 1H high-power decoupling, 27Al adapted decoupling yields 31P spectra with optimal sensitivity and resolution. The importance of double-resonance decoupling is further demonstrated by incorporating this technique in the MQHETCOR sequence. Unambiguous assignment of all the AlPO4-14 nuclear magnetic resonances is achieved by combining multiple-quantum evolution in the 27Al dimension and double-resonance decoupling in the 31P acquisition domain.
27Al 去耦已被用于消除微孔铝磷酸盐 AlPO4 - 14 和 AlPO4 - 40 中 31P 与 27Al 之间的残余 J 耦合相互作用。结合 1H 高功率去耦，27Al 适配去耦可产生具有最佳灵敏度和分辨率的 31P 谱。通过将该技术纳入 MQHETCOR 序列，进一步证明了双共振去耦的重要性。通过结合 27Al 维度中的多量子演化和 31P 采集域中的双共振去耦，实现了 AlPO4 - 14 所有核磁共振的明确归属。
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