3.3.6.3 Infrared Spectrometry

Define infrared spectroscopy

A technique used to identify compounds based on changes in vibrations of atoms when they absorb IR of certain frequencies

What occurs when molecules absorb infrared radiation

Bonds between atoms will vibrate by stretching, bending and twisting

What is the resonance frequency

Specific frequency at which the molecules with vibrate to stimulate larger vibrations

What shape is the OH alcohol spectrometry

U shaped

What is the OH acid spectrometry

V shaped

Define a fingerprint region

Containing tiny differences from species to species which act as molecules ‘fingerprints’

What wavelength is the fingerprint region up to

1400cm-1

Where can infrared absorption occur

In the atmosphere with molecules such as ozone

What does infrared absorption cause

Heat is trapped within the Earth’s atmosphere