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Infrared Spectroscopy

Infrared Spectroscopy. Terry A. Ring Chemical Engineering University of Utah. Molecular Vibrations. Mass on a spring Vibration Frequency ν=c/λ Wave number =1/ λ. Spectrometer. Single Beam Dual Beam with Reference Gas, Liquid & Solid Sample Cells Powder mixed with KCl to make pellet

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Infrared Spectroscopy

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  1. Infrared Spectroscopy Terry A. Ring Chemical Engineering University of Utah

  2. Molecular Vibrations • Mass on a spring • Vibration Frequency • ν=c/λ • Wave number =1/ λ

  3. Spectrometer • Single Beam • Dual Beam • with Reference • Gas, Liquid & Solid • Sample Cells • Powder mixed with KCl to make pellet • Reflection off surface of Sample • Attenuated Total Reflection Sample Sample

  4. Spectrum • Peak Identification

  5. Spectrum • Peak Identification • Valence Vibrations • Bending Vibrations

  6. Peak Identification

  7. Fourier Transform IR • Mixing light from • Fixed mirror • Moving mirror

  8. Raman Spectroscopy • Laser Light Illumination • Scattered Light Spectra Observed

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