Organic compounds -- part of the class 532-570 series – Organic compounds – Azoxy
Patent
1988-12-19
1990-05-22
Locker, Howard J.
Organic compounds -- part of the class 532-570 series
Organic compounds
Azoxy
534577, 534611, 534752, 534787, 548409, 548411, 25229901, 25229961, 252586, G02B 523, C09K 1934, C09K 1954, C07D491107
Patent
active
049279173
ABSTRACT:
There are provided compounds which give quasi-liquid crystals, which comprise a mesogenic group, which can contain bridging groups, a bridging group and a spiropyran moiety having a 2H pyran ring, a terminal group being attached to the mesogenic group. The mesogenic group contains two aromatic, heterocyclic or cycloaliphatic ring structures. The compounds are prepared by a coupling reaction of mesogenic groups with a spiropyran compound via a suitable bridging group. There is provided a process for producing quasi-liquid crystalline (QLC) films which are useful for producing a wide variety of devices based on the optical non-linearity of generation of second harmonics by such films. Such devices can also be based on ferroelectric, pyroelectric, piezoelectric effects and photoactivity of such oriented QLC films.
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Krongauz Valeri A.
Shvartsman Felix P.
Locker Howard J.
Thomas J. E.
Yeda Research and Development Co. Ltd.
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