Abstract
Visible spectra of chlorophyll in forty solvents have been recorded and the following parameters tabulated for each: position of the red and Soret bands, extinction coefficient and half-width of the red band, the Soret/red band and the Soret/Soret satellite band extinction coefficient ratios. The position of the red band depends more on the refractive index than on the dielectric constant. Interpretation of other spectral properties is assisted by division of solvents into three classes: (I) polar aliphatic compounds with single bonds only; (II) polar aliphatic compounds with multiple bonds; (III) mainly aromatic compounds. With the aid of this division, correlations were found between the half-width and the part of the red shift that depends on dielectric constant, between the position of the Soret and red bands, and between the Soret/red and the Soret/Soret satellite absorptivity ratios.
Published Version
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