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核磁共振作为有机分析主要工具之一,帮助鉴定了数十万种以上化合物的结构,而且随着实验技术的进步,与核磁共振有关技术的发展,用途也更加广泛,除在有机化学、高分子化学方面应用以外还深入到其他几乎所有的化学领域。本文介绍超导高磁场核磁共振的主要特点和当前核磁共振技术中最重要的脉冲傅立叶变换核磁共振的简单原理,以及弛豫时间的测定及其用途。由于应用傅立叶变换原理,能分别测出化合物中各基团的弛豫时间,使弛豫时间亦能提供有关分子结构的信息。因此在有机化学、生物化学等方面应用也有重要的意义。
As one of the main tools of organic analysis, NMR has helped to identify the structures of hundreds of thousands of compounds. With the advancement of experimental techniques, the development of NMR-related technologies has also become more widely used. In addition to their applications in organic chemistry, In addition to chemical applications, it is also used in almost every other chemical field. This paper introduces the main features of superconducting high-field NMR and the simplest principle of the most important pulsed Fourier transform (NMR) in nuclear magnetic resonance (NMR) and the determination of relaxation time and its applications. Due to the Fourier transform principle, the relaxation time of each group in the compound can be measured separately, and the relaxation time can also provide information about the molecular structure. Therefore, in organic chemistry, biochemistry and other applications are also of great significance.