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一、引言有机化合物的电子吸收光谱是由于分子中价电子的跃迁所形成的。光谱的波段范围是处在紫外和可见光区域,故又称为紫外-可见吸收光谱。紫外-可见光谱是电磁波谱中波长为1000—8000A范围的波段。其中波长在4000—8000A波段称为可见区;所谓可见光就是使人的眼睛有敏感的电磁辐射。紫外光区又可分为两个波段:波长在2000—4000A的范围称为近紫外区;波长在2000A以下的称为远紫外区或真空紫外区。分子的化学性质主要决定于分子中价电子的特性。实际上,分子的其他性能,如光学性质、电磁性质
I. INTRODUCTION The electron absorption spectrum of organic compounds is due to the valence electron transition in the molecule. Spectral wavelength range is in the UV and visible light region, it is also known as UV - visible absorption spectrum. UV - visible spectrum is the wavelength band of the electromagnetic spectrum 1000-8000A band. One of the wavelengths in the 4000-8000A band called the visible area; the so-called visible light is to make people’s eyes sensitive to electromagnetic radiation. UV light can be divided into two bands: the wavelength range of 2000-4000A called the near ultraviolet region; wavelength below 2000A called the far ultraviolet region or vacuum ultraviolet region. The chemical nature of a molecule depends mainly on its valence-electron properties. In fact, other properties of molecules, such as optical properties, electromagnetic properties