Abstract
Abstract The reflection Cotton effect in the infrared rotatory dispersion spectra of induced cholesteric mesophases (with positive and negative dielectric anisotropies) vanishes under the influence of a dc electric field applied parallel to the helical axis. The field interval between the threshold and full disappearance of the reflection Cotton effect for mesophases with negative dielectric anisotropy is twice as large as that for systems with positive dielectric anisotropy. A bathochromic shift of the reflection Cotton effect for the cholesteric mesophase of ZLI 1083 under the influence of a dc electric field was observed.
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