Analytical Descriptions of DEPT NMR Spectroscopy for IS(n) (I=1,S=1;n=1,2,3,4) Spin Systems

Abstract

A DEPT pulse sequence is well-known (13)C-detected, edited-pulse and cross polarization transfer NMR experiment which offers to selective detection capability of CH, CH(2) and CH(3) groups from each other. The product operator theory is widely used for analytical descriptions of the cross polarization transfer NMR experiments for weakly coupled spin systems. In this study, analytical descriptions of the DEPT NMR experiment have been presented for IS(n) (I = 1, S = 1; n = 1, 2, 3, 4) spin systems by using product operator theory. Then a theoretical discussion and experimental suggestions were made. It has been investigated that this experiment can be used to edit (14)N sub-spectra of partly or full deuterated (14)ND(n) (n = 1, 2, 3, 4) groups.