Raman optical activity

History of Raman optical activity

The field began with the doctoral work of Laurence D. Barron with David Buckingham at the University of Cambridge.

More developments, including important contributions to the development of practical Raman optical activity instruments, were made by Werner Hug of the University of Friburg, and Lutz Hecht with Laurence Barron at the University of Glasgow.

Theory of Raman optical activity

The basic principle of Raman optical activity is that there is interference between light waves scattered by the optical activity tensors of a chiral molecule, which leads to a difference between the intensities of the right- and left-handed circularly polarised scattered beams. The spectrum of intensity differences recorded over a range of wavenumbers reveals information about chiral centres in the sample molecule.

Biological Raman optical activity spectroscopy

Due to its sensitivity to chirality, Raman optical activity is a useful probe of crystallographic approaches, it is able to examine structure and behaviour in biologically more realistic conditions (compare the dynamic solution structure examined by Raman optical activity to the static crystal structure).

Related spectroscopic methods

Raman optical activity spectroscopy is related to circular dichroism.

Raman optical activity instruments

A simple introduction to Raman optical activity instruments can be found on Laurence Barron's site [1]. Much of the existing work in the field has utilised custom-made instruments, though commercial instruments are now available.