Enhanced sensitivity in RIACT/MQ-MAS NMR experiments using rotor assisted population transfer

Authors
Kwak, HT Prasad, S Yao, Z Grandinetti, PJ Sachleben, JR Emsley, L
Citation
Ht. Kwak et al., Enhanced sensitivity in RIACT/MQ-MAS NMR experiments using rotor assisted population transfer, J MAGN RES, 150(1), 2001, pp. 71-80
Citations number
31
Categorie Soggetti
Chemistry & Analysis","Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF MAGNETIC RESONANCE
ISSN journal
10907807 → ACNP
Volume
150
Issue
1
Year of publication
2001
Pages
71 - 80
Database
ISI
SICI code
1090-7807(200105)150:1<71:ESIRNE>2.0.ZU;2-X
Abstract
The rotor assisted population transfer (RAPT) sequence is used to enhance t he sensitivity of the RIACT(II) experiment for spin-3/2 quadrupolar nuclei. A detailed theoretical analysis of the polarizations that contribute to di fferent types of MQ-MAS experiments is provided. In particular, two polariz ation pathways are distinguished for the creation of triple-quantum coheren ce. The existence of these pathways is experimentally demonstrated by compa ring the sensitivities of different sequences with and without RAPT prepara tion. (C) 2001 Academic Press.