Material characterization methods molecular vibrations

Theoretical interpretation of molecular vibration spectra is not a simple task. It requires knowledge of symmetry and mathematical group theory to assign all the vibration bands in a spectrum precisely. For applications of vibrational spectroscopy to materials characterization, we can still interpret the vibrational spectra with relatively simple methods without extensive theoretical background knowledge. Here, we introduce some simple methods of vibrational spectrum interpretations. 

Selective analytic and spectroscopic methods for analyzing biomimetic model complexes bound to the support are rather limited, and a detailed characterization of such hybrid materials is much more challenging than of soluble molecular complexes. If local spectroscopic probes are available, IR spectroscopy, gel-phase or solid-state NMR spectroscopy, EPR spectroscopy, or (diffuse reflectance) UV-vis spectroscopy is applicable. Useful IR spectroscopic labels include CO, C=N, E-H, M=E, and M=E stretching vibrations as long as they are either very intense or are separated from the matrix vibrations. For EPR spectroscopic analysis, metal isotopes with nuclear spin 1 0 are suitable. Biologically interesting metal ions include (7 = 7/2, 99.76%), Mn I =512, 100%), Co (7 = 7/2, 100%), 3/65cu (7 = 3/2, 69.09% 7 = 3/2, 30.91%), and (7 = 5/2, 15.72% ... 

---