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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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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


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