The renaissance in Raman spectroscopy some 25-30 years ago had particular and immediate impact on Inorganic Chemistry,viz in areas such as the study of deeply coloued compounds,structural changes on change of state,equilibria,vapour phase band contour analysis,Raman band intensities and the nature of the chemical bond,metal-metal bonding,species in melts,identification of species in solution and of radicals by time-resolved techniques,in bioinorganic chemistry,and of linear-chain semiconductors.More recently,much attention has been directed at the quantitative level at the evaluation of geometric changes in molecules on excitation by resonance Raman spectroscopy.At the qualitative level Raman microscopy is now recognised to be the most effective technique for the identification of pigments-particularly the inorganic ones-on medieval manuscripts and especially of the components(down to grain sizes of -1 um)of pigment mixtures,It is thus a very important technique at the Arts/Science borderling in conservation science.
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