物理化学学报 >> 1991, Vol. 7 >> Issue (05): 618-622.doi: 10.3866/PKU.WHXB19910521
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晏欣; 王德华; 钱保功
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Yan Xin; Wang De-Hua; Qian Bao-Gong
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关键词: 13C自旋-晶格弛豫, 异核间的距离, 二维异核NOE谱, 聚(2,6-二甲基-1,4-苯醚), 聚异丁烯
Abstract: The heteronuclear cross-relaxation rates in polymers were determined by selective and conventional ~(13)C spin-lattice relaxation experiments, the proton-carbon distances were calculated by the theoretical formula, and two-dimensional NOE spectra of the polymers were also measured. The results showed that (1) the measured proton-carbon distances coincide with the distances from molecular models, (2) there is the observable dipolar cross-relaxation effect between the quaternary carbons and their neighboring protons, and (3) the optimum mixing times depend on the relaxation properties of the proton and carbon.
Key words: 13C spin lattice relaxation, Proton-Carbon distance, Two-dimensional heteronuclear NOE spectroscopy, Poly(2,6-dimethyl-1,4-phenyleneoxide), Polyisobutylene
晏欣;王德华;钱保功. 聚合物异核交叉弛豫及二维NOE谱[J]. 物理化学学报, 1991, 7(05): 618-622.
Yan Xin; Wang De-Hua; Qian Bao-Gong. Heteronuclear Cross-Relaxation and Two-Dimensional NOE Spectra of Polymers[J]. Acta Phys. -Chim. Sin., 1991, 7(05): 618-622.
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http://www.whxb.pku.edu.cn/CN/Y1991/V7/I05/618
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