A Floquet description of phase alternated sequences for efficient homonuclear recoupling in solid perdeuterated systems

作者：Jayanthi Sundaresan; Akbey Uemit^*; Uluca Boran; Oschkinat Hartmut; Vega Shimon

来源：Journal of Magnetic Resonance, 2013, 234: 10-20.

DOI：10.1016/j.jmr.2013.05.007

• Homonuclear recoupling
• Magic angle spinning
• Phase alternation
• PARIS irradiation schemes
• DONER

A Floquet description of a phase alternated homonuclear recoupling scheme for perdeuterated systems is presented. As a result, we demonstrate improvements in the recoupling efficiency of the DOuble Nucleus Enhanced Recoupling [DONER; J. Am. Chem. Soc. 131 (2009) 170541 technique by utilizing Phase Alternated Recoupling Irradiation Schemes [PARIS; Chem. Phys. Lett. 469 (2009) 342]. The effect of proton and deuterium radio frequency irradiation during recoupling has been systematically studied and theoretical observations have been verified experimentally using a deuterated model compound, L-Alanine, at 10 and 20 kHz magic angle spinning frequency. Experimental results are well in agreement with theoretical observations, thereby significantly increasing the recoupling efficiency of conventional DONER in perdeuterated systems.

• 出版日期2013-9