Interpret Raman Spectrum

Analyze Raman scattering spectra to identify molecular vibrations, apply selection rules complementary to infrared absorption, and integrate Raman data with IR results for a comprehensive vibrational analysis.

When to Use

• Analyzing samples that are difficult for IR (aqueous solutions, sealed containers, remote sensing)
• Identifying symmetric vibrations that are weak or inactive in IR
• Complementing IR data using the mutual exclusion principle for centrosymmetric molecules
• Characterizing carbon materials (graphene, carbon nanotubes, diamond) via characteristic Raman bands
• Analyzing inorganic compounds, minerals, or crystalline phases where Raman is often more informative than IR
• Performing non-destructive, in situ analysis (no sample preparation required for many Raman measurements)

Inputs

• Required: Raman spectrum data (Raman shift in cm-1 vs. intensity)
• Required: Excitation laser wavelength (e.g., 532 nm, 633 nm, 785 nm, 1064 nm)
• Optional: IR spectrum of the same sample for complementary analysis
• Optional: Polarization data (parallel and perpendicular spectra for depolarization ratios)