文档介绍：Contents
I Introduction to NMR Spectroscopy ........... 1
Nuclear ism ....................... 1
Nuclear Precession ....................... 2
Nuclear ic Energy Levels ................. 3
Nuclear ic Resonance ................... 4
Relaxation ........................... 5
Equilibrium of Nuclear Spins in the B. Field ............ 5
Spin-Lattice Relaxation ..................... 5
Spin-Spin Relaxation ...................... 6
Saturation ........................... 6
ization Vectors ...................... 7
Bloch Equations ........................ 8
Motion of the ization Vector in a Fixed Coordinate System . . 8
Motion of the ization Vector in the Rotating Coordinate System 9
NMR in the Rotating Frame of Reference ............. 10
Relaxation in the Rotating Frame of Reference ........... 12
NMR Spectra ......................... 13
Nuclear Induction ........................ 13
Absorption and Dispersion Spectra ................ 13
Magnitude Spectra ....................... 14
Chemical Shift ......................... 15
Shielding of Nuclei in Atoms and Molecules ............ 15
Calibration of NMR Spectra ................... 16
Reference Standard ....................... 17
Spin-Spin Coupling ....................... 17
Multiplicity of Signals ...................... 17
Coupling Constants ....................... 18
X Contents
between Chemical Shifts and Coupling Constants .... 18
Origin of Spin-Spin Coupling ................... 18
2 Instrumental Methods of I3C NMR Spectroscopy ... 21
Sensitivity of 13C NMR Spectroscopy ............... 21
Methods of Sensitivity Enhancement in 13C NMR Spectroscopy .... 21
Continuous Wave NMR Spectroscopy ............... 22
Pulsed NMR Spectroscopy .................... 22
ization ....................