Accession Number : ADA139985

Title :   Fluorescent Guests in Thermotropic and Chirality in Lyotropic Liquid Crystals.

Descriptive Note : Final rept. 1 Nov 80-31 Jan 84,

Corporate Author : TEMPLE UNIV PHILADELPHIA PA DEPT OF CHEMISTRY

Personal Author(s) : Labes,M M

PDF Url : ADA139985

Report Date : Mar 1984

Pagination or Media Count : 35

Abstract : Three problems were examined under this program. Firstly, a novel electro-optical display concept has been developed in our laboratory involving the incorporation of fluorescent (emissive) guest molecules into a cholesteric liquid crystal host. Improvements were made in the contrast ratios of such displays via electrochemical quenching. Secondly, a fundamental study was completed on the nature phase transitions in thermotropic liquid crystals confined in porous polymer films. Finally, new lyotropic fluid crystals were investigated to (a) try to develop non-aqueous lyotropic media, and (b) investigate orientational ordering and solubility of guest molecules in lyotropic nematics and cholesterics.

Descriptors :   *Liquid crystals, *Molecules, *Fluorescence, *Phase studies, Electrooptics, Liquid crystal display systems, Electrochemistry, Quenching, Phase transformations, Contrast, Ratios, Thermal properties, Polymeric films, Porosity, Molecular structure, Orientation(Direction), Chelate compounds, Hydrocarbons, Organometallic compounds, Spectroscopy

Subject Categories : Crystallography
      Atomic and Molecular Physics and Spectroscopy
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE