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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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Presentation Transcript
infrared spectroscopy

Infrared Spectroscopy

Terry A. Ring

Chemical Engineering

University of Utah

molecular vibrations
Molecular Vibrations
  • Mass on a spring
  • Vibration Frequency
  • ν=c/λ
  • Wave number =1/ λ
spectrometer
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

spectrum
Spectrum
  • Peak Identification
spectrum1
Spectrum
  • Peak Identification
    • Valence Vibrations
    • Bending Vibrations
fourier transform ir
Fourier Transform IR
  • Mixing light from
    • Fixed mirror
    • Moving mirror
raman spectroscopy
Raman Spectroscopy
  • Laser Light Illumination
  • Scattered Light Spectra Observed