INFRARED SPECTROSCOPY (IR). Infrared Spectroscopy. Chemical bonds absorb energy in the IR region related to the vibration of different bonds.
Chemical bonds absorb energy in the IR region related to the vibration of different bonds.
Infra-red absorbance values are reported as units of wavelength (λ, μm) or more commonly as wave numbers (ν, cm-1) which are related to frequency.
ν = 1/λand v = c/λ
Ifλis in cm then wave numbers are calculated to be in cm-1.
Higher frequency and shorter wavelengths represent higher energy.
There ate two types of bond vibrational modes: 1. stretching and 2. bending
Common Bond Stretching Regions in an IR Spectrum: