Although FT-Raman spectroscopy has proven to be applicable to a wide variety of applications, there remains a small number of samples which are not easily analyzed with the technique. Several sampling accessories which have been developed to further expand the applications of FT-Raman spectroscopy are demonstrated.
Pressure-tuning dispersive Raman spectroscopy, using diamond anvil cells, has many of the common limitations of Raman spectroscopy such as low signal intensity, as well as photodecomposition and fluorescence of many samples. In the present investigations, the pressure-tuning experiment has been successfully coupled to an FT-Raman spectrometer using a microscope for sample alignment and measurement. The use of a holographic notch filter to eliminate the intense scattering due to the diamond anvil cell is discussed and studies involving organometallic complex, polymers, and biomolecules are presented.