1,3,5-tricyano-2,4,6-tris(vinyl)benzene derivatives and method for preparing the same
The present invention relates to 1,3,5-tricyano-2,4,6-tris(vinyl)benzene derivatives and method for preparing the same. The 1,3,5-tricyano-2,4,6-tris(vinyl)benzene derivatives can be prepared by refluxing 1,3,5-tricyanomesitylene with N-formylamine dimethylacetal or substituted benzaldehyde, or by the Wittig reaction of 1,3,5-tricyano-2,4,6-tris[(diethoxyphosphoryl)methyl]benzene with substituted benzaldehyde. The 1,3,5-tricyano-2,4,6-tris(vinyl)benzene derivatives exhibit large first hyperpolarizability in solution and significant second harmonic generation (SHG) in the powder state, and are useful as optical devices such as electro-optic modulators, optical switch, or the like for treating optical signal in optical communication industry.
1. A 1,3,5-tricyano-2,4,6-tris(vinyl)benzene derivative of the formula II:
wherein, D is NR 1 R 2 or X 1 R 3 ;
wherein R 1 , R 2 and R 3 are independently hydrogen, alkyl, hydroxyalkyl, alkyl moiety, phenyl or aryl moiety, and
X 1 is oxygen or sulfur; and
Ar is an aromatic group represented by the following chemical formula III and n is 1;
wherein, R 4 , R 5 , R 6 , and R 7 , are independently hydrogen, halogen, aryl, hydroxy, alkoxy, aryloxy, alkyl, CN, alkyl moiety, phenyl or aryl moiety.
2. A method for preparing 1,3,5-tricyano-2,4,6-tris(vinyl)benzene derivatives, of claim 1 , wherein the derivatives are synthesized either by refluxing 1,3,5-tricyanomesitylene with N-formylamine dimethylacetal or substituted benzaldehyde, or by the Wittig reaction of 1,3,5-tricyano-2,4,6-tris[(diethylphosphoryl)methyl]benzene with substituted benzaldehyde.