Journal
CHIRALITY
Volume 16, Issue -, Pages S55-S61Publisher
WILEY
DOI: 10.1002/chir.20054
Keywords
dyed crystals; K2SO4; Trypan blue; azimuthal rotation; circular extinction contrast; dispersion
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We present measurements of the dispersion of anomalous azimuthal rotation signals from dyed crystals that are at variance with our predictions based on a model of these effects predicated on the predominance of Rayleigh scattering from isolated dye molecules (Kaminsky et al. J Phys Chem A 107:2800-2807, 2003). Here, we extend our scattering model to include the effects of the absorption and refraction of individual dyes that are inclined in a biased manner with respect to the eigenmodes of the medium. Our revised model describes the wavelength dependence of the rotations. It is likely that absorption, refraction, and Rayleigh scattering are all manifest, with absorption and refraction being the leading effects. (C) 2004 Wiley-Liss, Inc.
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