| 聚合物异核交叉弛豫及二维NOE谱 |
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| 引用本文： | 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(5). |
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| 作者姓名： | 晏欣 王德华 钱保功 |
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| 作者单位： | 中国科学院武汉物理所波谱与原子分子物理开放研究实验室，中国科学院武汉物理所波谱与原子分子物理开放研究实验室，中国科学院武汉物理所波谱与原子分子物理开放研究实验室 武汉 430071，武汉 430071，武汉 430071 |
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| 摘 要： | Kover和Batta首次采用选择性质子π脉冲来测定~(13)C自旋-晶格弛豫速率并与常规反转回复法测定的自旋-晶格弛豫速率相比较求出了交叉弛豫速率,并以此来计算异核间的距离,但他们的计算方法仅适用于满足极端窄化条件的刚性球状分子。二维异核NOE谱(HOESY)是1983年才发展起来的二维NMR技术,它可用来研究异核间的交叉弛豫作用及研究分子间相互作用。Kover和Batta在此方面作了许多
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| 关 键 词： | ~(13)C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 |
HETERONUCLEAR CROSS-RELAXATION AND TWO-DIMENSIONAL NOE SPECTRA OF POLYMERS |
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| Yan Xin Wang Dehua Qian Baogong.HETERONUCLEAR CROSS-RELAXATION AND TWO-DIMENSIONAL NOE SPECTRA OF POLYMERS[J].Acta Physico-Chimica Sinica,1991(5). |
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| Authors: | Yan Xin Wang Dehua Qian Baogong |
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| Affiliation: | Yan Xin Wang Dehua~* Qian Baogong |
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| 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. |
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| Keywords: | ~(13)C spin lattice relaxation Proton-Carbon distance Two-dimensional heteronuclear NOE spectroscopy Poly (2 6-dimethyl-1 4-phenylene oxide) Polyisobutylene |
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