Cotton effect

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Cot·ton ef·fect

the positive and negative displacement from zero of the rotation of plane polarized monochromatic light and the change of monochromatic circularly polarized light into elliptically polarized light in the immediate vicinity of the absorption band of the substance through which the light passes.
See also: optic rotatory dispersion, circular dichroism.
[Frank A. Cotton]


Frank A., U.S. chemist, 1930–.
Cotton effect - a change in the sign of optical rotation of a specimen as the wavelength of observation is changed.