Organic thermotropic nematic compounds
Abstract
Abstract A NEW FAMILY OF ORGANIC THERMOTROPIC NEMATIC COMPOUNDS COMPRISING N-(PARA-SUBSTITUTED ALKOXY-VENZYLIDENE)-ANILINES HAVING ALSO A PARA-N-BUTYL SUBSTITUTED ON THE ANILINE RING. THESE COMPOUNDS HAVE THE FOLLOWING STRUCTURAL FORMULA: 1-(RO-),4-((4-R''-PHENYL)-N=CH-)-BENZENE WHEREIN R IS A STRAIGHT CHAIN ALKYL GROUP CONTANING 1 TO 4 CARBON ATOMS AND R'' IS N-BUTYL. SYNTHESIS INVOLVES COMBINING THE DESIRED P-SUBSTITUTED BENZALDEHYDE AND P-NBUTYL ANILINE IN EQUIMOLAR PROPORTIONS IN ANHYDROUS ETHYL ALCOHOL WITH GLACIAL ACETIC ACID AS CATALYST. THE RESULTING HOMOLOGOUS SERIES OF COMPOUNDS ARE USEFUL AS MATERIALS WHICH UNDERGO A CHANGE IN OPTICAL PROPERTIES UNDER THE INFLUENCE OF EXTERNALLY APPLIED ENERGY, PREFERRED MEMBERS OF WHICH, EITHER INDIVIDUALLY OR IN BINARY MIXTURES, HAVE MELTING POINT NEAR ROOM TEMPERATURE, A BROAD NEMATIC MESOMORPHIC TEMPERATURE RANGE WITHIN AN OVERAL RANGE OF ABOUT 0* TO ABOUT 70*C., LOW VISCOSITY IN THE NEMATIC PHASE, GOOD STABILITY, AND SUBSTANTIALLY NO COLOR.
Inventors
- 👤 E Strebel
Bibliographic Details
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