Open AccessStatistical effects in the absorption and optical activity of particulate suspensions.
Author(s) -
Carlos Bustamante,
Marcos F. Maestre
Publication year - 1988
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.85.22.8482
Subject(s) - flattening , absorbance , absorption (acoustics) , absorption spectroscopy , suspension (topology) , spectral line , chromophore , chemistry , circular dichroism , scattering , molecular physics , analytical chemistry (journal) , gaussian , materials science , optics , crystallography , physics , chromatography , photochemistry , computational chemistry , mathematics , astronomy , homotopy , pure mathematics , composite material
The phenomenon of Duysens flattening of the absorption spectra resulting from the inhomogeneous distribution of the chromophores in the solution is analyzed. These inhomogeneities are treated as localized statistical fluctuations in the concentration of the absorbing species, by using the Gaussian distribution. A law of absorbance is obtained, and the effect of light scattering on the flattening is also characterized. The flattening in the circular dichroism spectra of particulate suspensions is then analyzed. It is shown that the degree of flattening of the circular dichroism of a suspension is, in general, different from the corresponding flattening of its absorption spectrum. A quantitative relationship between the two effects is established.