Harmonic peaks in 1D NMR spectra induced by radiation damping fields

Ling Peng; Shuhui Cai; Riqiang Fu; Chaohui Ye; Zhong Chen

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Harmonic peaks in 1D NMR spectra induced by radiation damping fields

Ling Peng 1,Shuhui Cai 1,Riqiang Fu 2,Chaohui Ye 3,Zhong Chen 1 * #

1.Department of Physics, Xiamen University

2.Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory

3.Wuhan Institute of Physics and Mathematics, the Chinese Academy of Science

*Correspondence author

#Submitted by

Subject:

Funding: 国家自然科学基金,国家自然科学基金,国家科技支撑计划,教育部博士点基金（No.10774125,10875101,2006BAK03A22,200803840019）

Opened online: 4 August 2009

Accepted by: none

Citation: Ling Peng,Shuhui Cai,Riqiang Fu.Harmonic peaks in 1D NMR spectra induced by radiation damping fields[OL]. [ 4 August 2009] http://en.paper.edu.cn/en_releasepaper/content/34265

It is found experimentally that there exist some harmonic peaks in one-dimensional NMR spectra of solution samples with two dominant solvents. Theoretical analysis indicates that such harmonic peaks are resulted from the interaction between two radiation damping fields induced by the dominant solvents. Using a homo-nuclear decoupling pulse as a radiation damping field, a novel detection approach is proposed to investigate the harmonic peaks without interferences caused by the nonlinear amplification of the receiver. The results presented herein give a new insight into the radiation damping effects in samples with solvent mixtures (e.g., natural products) at high fields.

Keywords:Nuclear magnetic resonance;Harmonic peaks;Radiation damping;Homo-nuclear decoupling

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