Continuous refractive index spectra

FIGURE 1. ORD spectrum of (+)-irans-9-methyl-l,4,9,10-tetrahydronaphthalene, (dots). The two lines are computational results with (dashed) or without (continuous line) correction for the solvent refractive index. Reprinted with permission from Reference 9. Copyright 1961 American Chemical Society... 

Bonino was the first chemist in Italy at the beginning of the 1920s to perceive and to exploit the importance of infrared spectroscopy for chemistry. The infrared technique offered considerable advantages for researchers working on the composition and structure of chemical compounds. While traditional methods of analysis, such as measurements of melting point or refractive index, yield information about one particular characteristic of the compound, an infrared spectrum offers several physical indicators. Despite their importance to infrared spectroscopy, however, Bonino s papers did not lead to a strong reception along the same lines within the Italian chemical community. Italian chemists continued to use classical methods of... 

The parameters e0, A, A0 were adjusted to retain continuity with the actual spectrum used, and to fit the refractive-index variations in the visible region published by other authors.94 At low temperature, we had... 

FG540/PMMA. For absorption spectra, the thin line is for an unirradiated sample and the bold line is for an irradiated sample. For refractive index spectra, circles represent refractive indices measured by an / -line method for an unirradiated sample (o) and irradiated sample( ). Lines represent continuous spectra of refractive indices obtained by Kramers-Kronig transformation, (b) Spectra of refractive index changes. Circles represent refractive index changes measured by an m-line method and the line represents refractive index changes obtained from Krameis-Kronig transformation by using a difference absorption spectrum ftom 200 nm to 2 jum. 

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