Double-quantum NMR spectroscopy based on finite pulse RFDR.
We demonstrate that the finite pulse RFDR sequence (J. Chem. Phys. 114 (2001) 8473) can be used effectively for 31P double-quantum NMR spectroscopy at a spinning frequency of 10 kHz. The 31P NMR data measured for hydroxyapatite and octacalcium phosphate show that sizable double-quantum excitation efficiency can be obtained with the ratio of the recoupling field to spinning frequency set equal to 1.67.
Tseng
Yao-Hung
YH
Department of Chemistry, National Taiwan University, College of Science, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
Mou
Yun
Y
Mou
Chung-Yuan
CY
Chan
Jerry C C
JC