Indirect high-resolution detection for quadrupolar spin-3/2 nuclei in dipolar HMQC solid-state NMR experiments

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• 作者：Julien Tré ; bosc ; Olivier Lafon ; Bingwen Hu ; Jean-Paul Amoureux
• 刊名：Chemical Physics Letters
• 出版年：2010
• 出版时间：20 August 2010
• 年：2010
• 卷：496
• 期：1-3
• 页码：201-207
• 全文大小：1436 K

文摘

We present a new kind of NMR pulse sequences to observe heteronuclear correlation (HETCOR) specifically between spin-1/2 and spin-3/2 nuclei with isotropic resolution on the quadrupolar channel. These methods, called HMQC-ST, feature a STMAS filter during the evolution period of the HMQC scheme. Compared to existing HETCOR techniques involving quadrupolar nuclei, the HMQC-ST combines high-resolution and high efficiency and allows indirect detection of spin-3/2 nuclei via sensitive nuclei. We study analytically and using simulations how through-bond and through-space HMQC-ST perform compared to regular HMQC sequence. HMQC-ST potential is demonstrated experimentally by recording through-space HETCOR 2D spectra of Na₂HPO₄ and NaH₂PO₄.