Quasi-Liquid Crystalline Materials with Special Electro-Optic Properties
Abstract
Photo/thermochromic liquid crystals and liquid crystal polymers were synthesized by combination of spiropyran and mesogenic groups in one low molar mass molecule or macromolecules. The spiropyran-merocyanine conversion affects the mesophase structure and results in formation of non-centrosymmetric non- linear optical material, generating second harmonics. Aggregation of merocyanine molecules leads to a new photomechanical effect in low molar mass compounds and to the rheo-optical and boundary spectral effects in the side chain liquid crystal copolymers containing spiropyran side groups. Polychromic phototransformations in the copolymers as well as accompanying structural changes enable use of the polymer films for optical information storage. Keywords: Polysiloxanes, Polyacrylates, Non-linear optics, Optical information storage, Photochromism, Rheo-optical effect, Second harmonic, Side chain liquid crystal polymers, Spectrum broadening.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1988
- Accession Number
- ADA206015
Entities
People
- Valeri Krongauz
Organizations
- Weizmann Institute of Science