Accession Number : ADA191280

Title :   Quasi-Liquid Crystalline Materials with Special Electro-Optic Properties.

Descriptive Note : Periodic rept. nos. 1-5, Dec 85-Nov 87,

Corporate Author : WEIZMANN INST OF SCIENCE REHOVOTH (ISRAEL)

Personal Author(s) : Krongauz, Valeri

PDF Url : ADA191280

Report Date : Nov 1987

Pagination or Media Count : 20

Abstract : In the research proposal submitted to the European Research Office of the US Army we have described a new type of organic material, quasi-liquid crystals (QLC's) obtained by us from thermochromic spiropyrans with mesogenic substituents. We have defined some basic properties of the material, that can be of practical importance. During the past two months the studies on QLC's have been concentrated on further investigation of the structure of this new material. For structural studies the thin films of QLC's were aligned in the electrostatic field. We examined polarization absorption spectra of the films in the UV and visible regions and polarization ESR spectra. Recently the FTIR technique was used for IR observation of polarization of different groups in the spiropyran molecules aligned in the films. We used different coloured and fluorescent additives as probes in absorption and emission spectroscopy and a paramagnetic probe in ESR studies.

Descriptors :   *ABSORPTION SPECTRA, *ELECTROOPTICS, *ELECTROSTATIC FIELDS, *EMISSION SPECTROSCOPY, *MOLECULES, *ORGANIC MATERIALS, *PARAMAGNETISM, ABSORPTION, EUROPE, MATERIALS, OBSERVATION, POLARIZATION, PROBES, STRUCTURAL PROPERTIES, THIN FILMS, ULTRAVIOLET RADIATION, VISIBLE SPECTRA

Subject Categories : Crystallography
      Atomic and Molecular Physics and Spectroscopy
      Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE