화학공학소재연구정보센터
Chemical Physics Letters, Vol.511, No.4-6, 424-426, 2011
Relaxation compensated and intensity recovered dynamics of cross polarization in the frame of reciprocity relation
Through combing the scheme of TORQUE (by Tekely et al.) with cross depolarization (CDP), we derived a relaxation compensated and intensity recovered Hartmann-Hahn CP dynamics in the frame of reciprocity relation. As a result, the CP dynamics of TORQUE (CPT1 rho Q(t)) emerges from the T-1 rho damped dynamics and upon normalization of the intensities by the reciprocity relation, it is perfectly symmetric with respect to the CDP(t). Along with an enhancement factor of CP defined as eta(t) = [1 - CDP(t)](gamma(1)/gamma(s)) and a scaling factor between two peak intensities, lambda(t') = PICP(t')/PIT1 rho Q(t'), this method provides a convenient, robust, and quantitative measure of CP spectra. Crown Copyright (C) 2011 Published by Elsevier B. V. All rights reserved.