Chapter 14 Spectroscopic methods of structure determination 结构测定的光谱方法 14.1 Introduction 1 Ultraviolet Spectroscopy(uv) 测定有机物中是否存在共轭双键和芳香族化合 物 2 nfrared spectroscopy(R)红外光谱-测 定有机物中官能团
Chapter 14 Spectroscopic methods of structure determination 结构测定的光谱方法 14.1 Introduction 1 Ultraviolet Spectroscopy (uv) 紫外光谱---- 测定有机物中是否存在共轭双键和芳香族化合 物 2. Infrared spectroscopy (IR)红外光谱----测 定有机物中官能团
3. Nuclear Magnetic Resonance Spectroscopy(NMR 测定有机物中不同类型 的 氢或碳数目和位置。 (H NMR and 13C NMR) 4. Mass spectroscopy(MS)质谱--测 定有机物的分子量
3. Nuclear Magnetic Resonance Spectroscopy(NMR) 核磁共振光谱----测定有机物中不同类型 的 氢或碳数目和位置。 （1H NMR and 13C NMR) 4. Mass Spectroscopy (MS)质谱----测 定有机物的分子量
The characteristic methods of determination 1. Microscale sample; (1-5 mg) 2 t need short time to determine sample 3. Identify structure very fast 1.重点;识谱并了解简单原理
The characteristic methods of determination 1. Microscale sample; (1 – 5 mg) 2. It need short time to determine sample 3. Identify structure very fast. 1. 重点；识谱并了解简单原理
14.1 The electromagnetic spectrum电子波谱 A wave is usually described in terms of its wavelength(波长λ) or its frequency(频率v The energy of quantum of electromagnetic energy(E)is directly related to its frequency the frequency h . Planck's constant, 6.63 X 10-34JS
14.1 The electromagnetic spectrum 电子波谱 A wave is usually described in terms of its wavelength (波长λ ） or its frequency (频率ν) The energy of quantum of electromagnetic energy (E) is directly related to its frequency. ν ----- E = hv the frequency (Hz) h ----- Planck's constant, 6.63 X 10 -34 JS
Since v=c/, the energy of electromagnetic radiation is inversely proportional to its wavelength C c-----the velocity of light 入入 waveleng hC E
Since v = c /λ, the energy of electromagnetic radiation is inversely proportional to its wavelength. ν = C λ C λ E = hC -----the velocity of light λ ----- wavelength