Relaxation compensated and intensity recovered dynamics of cross polarization in the frame of reciprocity relation

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• 作者：Wenfang Shu^a ; Shanmin Zhang ; ^a ; ^{shanminz@hotmail.com" rel="nofollow}
• 刊名：Chemical Physics Letters
• 出版年：2011
• 出版时间：5 August 2011
• 年：2011
• 卷：511
• 期：4-6
• 页码：424-426
• 全文大小：238 K
• ISSN：S0009261411007305

文摘

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 (CP_T1ρQ(t)) emerges from the T_1ρ 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 η(t) = [1-CDP(t)](γ_I/γ_S) and a scaling factor between two peak intensities, λ(t^′)=PI_CP(t^′)/PI_T1ρQ(t′), this method provides a convenient, robust, and quantitative measure of CP spectra.