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紫外及可见吸收光谱紫外及可见(以下通称为紫外)吸收光谱的由来物质的分子运动时伴随着有一定能量的变化。倘从具有较低能量的第一态变至具有较高能量的第二态时,必须吸收相当于这两态能量的差值,这能量从辐射能获得;当分子从第二态又变回第一态时,又重新放出等量的能。能量与辐射的频率成正变,与波长成反变,因之需要的能量愈大时,被吸收的辐射的波长也愈小。在分子的各种运动方式中,其原子外层的电子易位时吸收的辐射是紫外线或可见光。波长50—400mμ(1mμ=10~(-7)cm.;1mμ=10A)的辐射称为紫外线,波长
UV and visible absorption spectra UV and visible (hereinafter commonly referred to as UV) absorption spectrum of the origin of the material molecular movement accompanied by a certain energy change. If we change from the first state with lower energy to the second state with higher energy, we must absorb the difference corresponding to the energy of the two states, which is obtained from the radiant energy. When the molecule changes back from the second state The first state, but also re-release the same amount of energy. The frequency of energy and radiation is a positive change, and the wavelength of anti-into, so the greater the energy required, the absorbed radiation is also the smaller the wavelength. In various modes of molecular movement, the radiation that is absorbed by electrons in the outer layers of their atoms is ultraviolet light or visible light. Wavelength 50-400mμ (1mμ = 10 ~ (-7) cm .; 1mμ = 10A) is called ultraviolet radiation, wavelength