IB Chemistry on Infrared Spectroscopy and IR Spectra analysis
Infrared Spectroscopy
8
Infrared Spectroscopy Terry A. Ring Chemical Engineering University of Utah
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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 - PowerPoint PPT Presentation
Transcript of Infrared Spectroscopy
![Page 1: Infrared Spectroscopy](https://reader035.fdocument.org/reader035/viewer/2022072013/56812c79550346895d91203d/html5/thumbnails/1.jpg)
Infrared Spectroscopy
Terry A. Ring
Chemical Engineering
University of Utah
![Page 2: Infrared Spectroscopy](https://reader035.fdocument.org/reader035/viewer/2022072013/56812c79550346895d91203d/html5/thumbnails/2.jpg)
Molecular Vibrations
• Mass on a spring
• Vibration Frequency
• ν=c/λ
• Wave number =1/ λ
![Page 3: Infrared Spectroscopy](https://reader035.fdocument.org/reader035/viewer/2022072013/56812c79550346895d91203d/html5/thumbnails/3.jpg)
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
![Page 4: Infrared Spectroscopy](https://reader035.fdocument.org/reader035/viewer/2022072013/56812c79550346895d91203d/html5/thumbnails/4.jpg)
Spectrum
• Peak Identification
![Page 5: Infrared Spectroscopy](https://reader035.fdocument.org/reader035/viewer/2022072013/56812c79550346895d91203d/html5/thumbnails/5.jpg)
Spectrum
• Peak Identification– Valence Vibrations– Bending Vibrations
![Page 6: Infrared Spectroscopy](https://reader035.fdocument.org/reader035/viewer/2022072013/56812c79550346895d91203d/html5/thumbnails/6.jpg)
Peak Identification
![Page 7: Infrared Spectroscopy](https://reader035.fdocument.org/reader035/viewer/2022072013/56812c79550346895d91203d/html5/thumbnails/7.jpg)
Fourier Transform IR
• Mixing light from– Fixed mirror – Moving mirror
![Page 8: Infrared Spectroscopy](https://reader035.fdocument.org/reader035/viewer/2022072013/56812c79550346895d91203d/html5/thumbnails/8.jpg)
Raman Spectroscopy• Laser Light
Illumination
• Scattered Light Spectra Observed