Accession Number : ADA290525

Title :   Transitions in Liquid Crystals Initiated with Circularly Polarized Light.

Descriptive Note : Final rept.,

Corporate Author : ILLINOIS UNIV AT URBANA DEPT OF CHEMISTRY

Personal Author(s) : Schuster, Gary B.

PDF Url : ADA290525

Report Date : SEP 1994

Pagination or Media Count : 13

Abstract : The fundamental goal of this research is the discovery of new means to control the physical and optical properties of liquid crystals with light. In work on this project we focused on the development of chiroptical triggers designed to induce a reversible nematic to cholesteric transition in a liquid crystal under the influence of circularly polarized light. Three classes of systems were investigated -- biaryl chromophores, axially symmetric benzylidene cyclohexanes, and chiral cycloheptatrienes. None of these compounds meet all of the requirements for a chiroptical trigger, but the knowledge gained enables a clearer definition of the properties a successful trigger must possess. (jg)

Descriptors :   *POLARIZATION, *LIGHT, *LIQUID CRYSTALS, *TRANSITIONS, *CIRCULAR, OPTICAL PROPERTIES, PHYSICAL PROPERTIES, CHOLESTEROL, ORGANIC COMPOUNDS, AXISYMMETRIC, CYCLOHEXANES, BENZYL RADICALS, CYCLOHEPTATRIENES.

Subject Categories : Organic Chemistry
      Physical Chemistry
      Crystallography
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE