【摘要】 <正> Kover和Batta首次采用选择性质子π脉冲来测定¹³C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在此方面作了许多更多还原

【Abstract】 The heteronuclear cross-relaxation rates in polymers were determined by selective and conventional ¹³C 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.更多还原