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Spectroscopy & Spectrometry

IR: Fundamentals

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Learn about the underlying concepts of infrared spectroscopy and explore how vibrational energy levels are related to an infrared spectrum.

Learning Outcomes

  • Know that IR spectroscopy investigates the vibrational energy levels of molecules
  • Differentiate between the harmonic oscillator and the Morse potential
  • Describe the different modes of bond vibration, and deduce which of these modes are IR active
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Concepts Principles and Theories

  • What is meant by stretching frequency 
  • How the length and strength of a bond affects the stretching frequency 
  • What is meant by vibrational transitions and the fundamental transition
  • How to calculate the number of modes of vibration for a molecule
  • How to identify whether a mode is IR active 

Interpreting and Analysing Data

  • How active vibrations are represented on an IR spectrum
  • How to identify the corresponding peak for different active vibrational modes

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Dr. Ciorsdaidh Watts
University of Glasgow

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