Spectral editing based on selective excitation and Lee-Goldburg cross-polarization under magic angle spinning.
We show that a Gaussian-shaped pulse can be used to excite selected 1H signals in hydroxyapatite, monetite and H-Y zeolite loaded with trimethylphosphine oxide (TMPO). This selective excitation method can be incorporated into Lee-Goldburg (LG) cross-polarization to obtain useful spectral editing opportunity. This new strategy has been applied to identify the Brønsted and the Lewis acid sites in H-Y zeolite using TMPO as the probe molecule.
Huang
Shing-Jong
SJ
Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan.
Tseng
Yao-Hung
YH
Mou
Yun
Y
Liu
Shang-Bin
SB
Huang
Shih-Hao
SH
Lin
Chun-Pin
CP
Chan
Jerry C C
JC
D000465:Algorithms; D003497:Cyclic N-Oxides / Q000032:analysis*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008903:Minerals / Q000032:analysis*; D011522:Protons; D012815:Signal Processing, Computer-Assisted; D013057:Spectrum Analysis / Q000379:methods*; D013113:Spin Labels
D003497:Cyclic N-Oxides; D008903:Minerals; D011522:Protons; D013113:Spin Labels; C051831:3,3,5,5-tetramethyl-1-pyrroline N-oxide