This application note explores the differences and complementarities of Raman vs. infrared spectroscopy for unknown material identification and reaction monitoring. Although the two techniques share similarities in measuring the vibrational energy levels of a material, the selection rules governing them are quite different.

The note provides a detailed analysis of which vibrational modes are better suited for Raman analysis and which ones are better suited for infrared, using molecular symmetries and group theory. The sample used in this application note is Octasulfur, the most commonly occurring sulfur in nature.

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Discover how molecular symmetries and character tables can be used to determine the allowed vibrational modes of a molecule for infrared and Raman analysis.

Raman vs. Infrared Measurements

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