Open AccessOn the influence of their state in solution on the absorption spectra of dissolved dyes
Publication year - 1909
Publication title -
proceedings of the royal society of london. series a, containing papers of a mathematical and physical character
Language(s) - English
Resource type - Journals
eISSN - 2053-9150
pISSN - 0950-1207
DOI - 10.1098/rspa.1909.0031
Subject(s) - cyanine , solvent , orange (colour) , absorption spectroscopy , absorption (acoustics) , absorption band , chemistry , spectral line , analytical chemistry (journal) , photochemistry , materials science , optics , chromatography , organic chemistry , physics , food science , astronomy , fluorescence , composite material
In a previous investigation of the absorption spectra and sensitising properties of someiso cyanine dyes,* the influence of the solvent was examined and it was found that the absorption maximum was shifted toward the red as the refractive index of the solvent increased. This is in accordance with Kundt’s law. The absorption in water, however, differs markedly from that in organic solvents. In the latter the spectrum consists of a prominent band in the orange and a half-shade nearer the blue. In water this half-shade has become a separate band comparable in intensity with the orange. Absorption curves in alcohol and water are shown. It is convenient to term the band near the red the β-(organic) band, the one nearer the blue theα -(water) band. It appeared desirable to investigate this difference further.