Patent ID: 6229047
Filing Date: 2001-05-08
Classification: C07C,C07D

Abstract:
A nonlinear optical material comprising a recrystallized crystalline azine bridged di-arene having a net macroscopic dipole moment and described by the formula:D--Ar.sup.1 --B--A.sup.2 --Awherein:Ar.sup.1 is a first arenyl group and AR.sup.2 is a second arenyl group which may be the same as or different from Ar.sup.1 ;D is an electron donor substituent on said first arenyl group;A is an electron acceptor group on said second arenyl group; andB is an azine bridge interconnecting said first and second arenyl groups and is a conjugated azinyl groups; and is a conjugated azinyl group characterized by the formula:--E.sup.1.dbd.N--N.dbd.E.sup.2 --wherein E.sup.1 and E.sup.2 are each independently C.sup.1 -C.sup.4 linear groups which may be the same or different and which are substituted with substituent side groups R' and R"" respectively, wherein R' and R"" are racemic and each independently contain one or two carbon atoms, said material having a macroscopic dipole alignment factor of at least 0.1.