Patent ID: 7232913

Claim:
A compound of the formula wherein D 1 , D 2 ,D 3 and D 4 are the same or different and are each independently selected from the group consisting of wherein i) R 1 and R 2 are each independently hydrogen or a substituted alkyl or aryl group, or ii) R 1 and R 2 taken together with the nitrogen atom to which they are attached form a substituted or non-substituted hetorocycle which is saturated or nonsaturated; and wherein Z 5 is a substituted or non substituted stilbenoid group of the formula wherein Ar 1 is a substituted or non-substituted cyclic aromatic group providing two carbon atoms through which R 4 and N are respectively attached to Z 5 , R 3 is hydrogen or a substituted or non-substituted alkyl or aryl group, and R 4 and N taken together with the carbon atoms of Z 5 to which R 4 and N are attached form a substituted or non-substituted heterocycle which is saturated or nonsaturated; wherein Z 1 , Z 2 , Z 3 and Z 4 are each independently a substituted or non-substituted stilbenoid group of the formula where Ar 2 is and arylene group, and n is an integer from 1 to 5 in (a) or from 0 to 4 in (b); each of Z 1 , Z 2 , Z 3 ,Z 4 , Z 5 , R 1 , R 2 , R 3 , and R 4 can be independently substituted with one or more halogen, alkyl, aryl, alkoxy, aryloxy, cyano, nitro, aroyl, acyl or hydroxy groups.