Product Operator Descriptions of INEPT and RINEPT NMR Spectroscopies for ISn (I=1/2, S=3/2) Spin Systems

Abstract

The product operator descriptions of INEPT and reverse INEPT (RINEPT) NMR experiments are introduced for weakly coupled IS<inf>n</inf> (I=1/2, S=3/2 with n=1,2,3) spin systems. Explicit expressions for polarization transfer from spin-3/2 quadrupolar nuclei to spin-1/2 nuclei (and reversed polarization transfer) are given in detail by using the evolutions of product operators under the spin-spin coupling Hamiltonian. The results calculated for the intensities and positions of the observable signals are simulated in the molecules containning the 119Sn (I=1/2) and 35Cl (S=3/2) nuclei at the coupling constant of J<inf>Sn-Cl</inf>=375Hz by using the Maple programme on computer. © 2004 Elsevier Inc. All rights reserved.