title: A Floquet description of phase alternated sequences for efficient homonuclear recoupling in solid perdeuterated systems.
abstract: 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) 17054] 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.
authors.affiliation: Department of Chemical Physics, Weizmann Institute of Science, Rehovot 76100, Israel.
authors.forename: Sundaresan
authors.initials: S
authors.lastname: Jayanthi
authors.forename: Ümit
authors.initials: Ü
authors.lastname: Akbey
authors.forename: Boran
authors.initials: B
authors.lastname: Uluca
authors.forename: Hartmut
authors.initials: H
authors.lastname: Oschkinat
authors.forename: Shimon
authors.initials: S
authors.lastname: Vega
keywords: DONER; Homonuclear recoupling; Magic angle spinning; PARIS irradiation schemes; Phase alternation