Infra-Red Spectroscopy

An infrared spectrum (IR) represents a fingerprint of a sample with absorption peaks corresponding to the vibrational modes of the molecules. Because each different compound is a unique combination of atoms, no two compounds produce the exact same IR spectrum. Fourier Transform Infra-Red (FT-IR) has the following advantages:

  • Speed: Because all of the frequencies are measured simultaneously, measurements by FT-IR are made in a matter of seconds. This is sometimes referred to as the Felgett Advantage;
  • Sensitivity: Sensitivity is dramatically improved with FT-IR for many reasons. The detectors employed are much more sensitive than IR, the optical throughput is much higher which is referred to as the Jacquinot Advantage.

Our IR analysis capabilities range from standard IR to analyse powder-like samples to Reflection-Absorption IR Spectroscopy (RAIRS) which provides information on which part of a molecule absorbs on a surface, how strongly it is bound and its orientation. 

Infra-Red Spectroscopy
Identifying chiral foot-prints of single molecules at surfaces. Raval, J.Am Chem Soc. 131 (2009) 10173