论文部分内容阅读
一、引言核磁共振谱是有机结构研究中的一种常规的有力武器。近年来,核磁共振谱学又有了不少发展,核极化效应(Nuclear Overhauser Effect,简称NOE)就是其中之一。 1953年,Overhauser报告了在金属中,当电子的自旋共振被饱和时,原子核产生动态极化。 1955年,Solomon首先把这个效应用于含有核自旋的系统中,他研究了HF中的化学交换,因为是在核与核之间进行的极化效应,所以称为核极化效应。 1965年,Kaiser第一个报告质子与质子
I. INTRODUCTION Nuclear magnetic resonance spectroscopy is a conventional and powerful weapon in organic structure research. In recent years, there has been quite a lot of development in NMR spectroscopy, of which the Nuclear Overhauser Effect (NOE) is one of them. In 1953, Overhauser reported that in the metal, when the electron’s spin resonance is saturated, the nucleus produces dynamic polarization. In 1955, Solomon firstly applied this effect to systems containing nuclear spins. He studied the chemical exchange in HF because it is the polarization effect between nuclei and nuclei and is called the nuclear polarization effect. In 1965, Kaiser first reported protons and protons