Raman Spectroscopy By P.H.Shi 2018.01.04.

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Presentation transcript:

Raman Spectroscopy By P.H.Shi 2018.01.04

THEORY DEVICE EXPERIMENT APPLICATION

THEORY Scattering of light by molecules

THEORY Diagram of the Rayleigh and Raman Scattering Processes An electron is excited from the ground level and falls to the original ground level. (b) An electron is excited from the ground level and falls to a vibrational level. (c) An electron is excited from a vibrational level and falls to the ground level.

THEORY Diagram of the Rayleigh and Raman Scattering Processes 瑞利散射光斯托克斯线反斯托克斯线

THEORY Wavenumber ω Note on Units expressed in inverse centimeters (cm−1)

DEVICE

EXPERIMENT E T2 A1 E T2 T1 A1

EXPERIMENT Fermi resonance Bertran J F , et al. Spect rochimi ca Acta , 1968 , 24 :1765

EXPERIMENT 30% mixture of methanol in ethanol

EXPERIMENT 30% mixture of methanol in ethanol

APPLICATION Whisky Brandy ……. Preference Cost

Raman spectra of HXEGT★ APPLICATION Raman spectra of HXEGT★ 1 2 3 4 5 6 7 8 (cm^-1) 好酒

Thanks for your listening! GUIDANCE: Mrs Yao Mrs Xiao PARTNER : Liu Jin Feng