论文部分内容阅读
二维核磁共振波谱学是七十年代中期出现的核磁共振领域中的最新技术之一。其中所谓二维傅里叶变换波谱学(2DFTS),是把时间坐标轴分为三个周期:预备期、发展期和检测期,并在适当的时刻加上射频脉冲,就可以得到依赖于两个时间变量的函数S(t_1,t_2),对此函数进行双重傅里叶变换,得到依赖于两个频率变量的函数S(F_1,F_2),这就是二维的核磁共振谱。它使核磁共振谱图的谱峰由平面变成立体,从而变得直观、简单、便于解析。把自旋回波方法与二维傅里叶变换方法相结合产生了二维J谱学方法,它不仅能把耦合常数与化学
Two-dimensional nuclear magnetic resonance spectroscopy is one of the newest technologies in the field of nuclear magnetic resonance that appeared in the mid-1970s. The so-called two-dimensional Fourier transform spectroscopy (2DFTS), the time axis is divided into three periods: preparation, development and detection period, and at the right moment with radio frequency pulse, you can get depends on two Time function S (t_1, t_2). The function is double Fourier transformed to obtain the function S (F_1, F_2) that depends on two frequency variables. This is the two-dimensional NMR spectrum. It makes the spectral peak of the NMR spectrum from planar to solid, making it intuitive, simple and easy to interpret. The combination of the spin echo method with the two-dimensional Fourier transform method yields a two-dimensional J-spectroscopy approach that not only combines the coupling constants with chemistry