CLAIMS
1. A cyano-derivatized oligonophenylacetylene-based fluorescent small molecule characterized in that the general formula of:
2. The cyano-derivatized oligonophenylacetylene-based fluorescent small molecule according to Claim 1, characterized in that the Xi and X2 in the general formulation is selected from a group with hydrogen atom independent of each other or straight chain containing 1 to 40 carbon atoms, branched saturated alkyl or alkoxy group, straight chain having alkene or alkyne functional groups or branched unsaturated alkyl or alkoxy group.
3. The cyano-derivatized oligonophenylacetylene-based fluorescent small molecule according to Claim 1, characterized in that the Y1-Y4 in the general formulation is selected from a group with hydrogen atom or cyano (-CN) functional group or straight chain containing 1 to 40 carbons or branched saturated alkyl or alkoxy group or straight chain having alkene or alkyne functional groups or a group containing a branched unsaturated alkyl or alkoxy group provided that at least one of them is a cyano (-CN) functional group, independent from each other.
4. The cyano-derivatized oligonophenylacetylene-based fluorescent small molecule according to Claim 1, characterized in that the Ari in the general formulation is selected from an aryl group of 6-20 carbon atoms with or without one or more alkyl or alkoxy substituents, and a heteroaryl group of 5-20 ring atoms with or without one or more alkyl or alkoxy substituents.
5. The cyano-derivatized oligonophenylacetylene-based fluorescent small molecule according to Claim 1 , characterized in that the Arc has general formulation:
6. A formulation of Ar3 according to Claim 5 characterized in that it is selected from an aryl group of 6-20 carbon atoms with or without one or more alkyl or alkoxy substituents and a heteroaryl group of 5-20 atoms with or without one or more alkyl or alkoxy substituents.
7. The cyano-derivatized oligonophenylacetylene-based fluorescent small molecule according to Claim 1, characterized in that the Arc has formulation of :
8. A formulation of Ar2 Claim 7, characterized in that the Zi-Z8 is selected from hydrogen independently of one another or straight chain containing 1 to 40 carbons or branched saturated alkyl or alkoxy group or straight chain having alkene or alkyne functional groups or a group containing the aromatic amine group of the branched unsaturated alkyl or alkoxy group.
9. The cyano-derivatized oligonophenylacetylene-based fluorescent small molecule according to Claim 1, characterized in that the‘a’ in the general formulation is any number between 0 and 3.
10. The cyano-derivatized oligonophenylacetylene-based fluorescent small molecule according to Claim 1, characterized in that the‘b’ in the general formulation is 0 or 1.
11. The cyano-derivatized oligonophenylacetylene-based fluorescent small molecule according to Claim 1, characterized in that in the general formulation,
- Xi and X2 -0(CH2)CH(C2H5)(C4H9) alkoxy group,
- Y i cyano (-CN) group,
- Y2, Y3 and Y4 H atom,
- a and b = 0, which yields small molecule 2,2'-((2,5-bis((2- ethylhexyl)oxy)- 1,4- phenylene)bis(ethyn-2,l-dil))dibenzonitrile (A) is obtained.
12. The cyano-derivatized oligonophenylacetylene-based fluorescent small molecule according to Claim 1 , characterized in that in the general formulation,
- Xi and X2 is -0(CH2)CH(C2H5)(C4H9) alkoxy group,
- Yi is -CN (cyano) group,
- Y2, Y3 and Y4 is H atom,
- a and b is 1,
- An is“benzene” aryl group,
- Ar2 is aromatic amine group 
which yield small molecule
4,4"-((2,5-bis((2-ethylhexyl)oxy)-l,4-phenylene)bis(ethyn-2,l-dil))bis(4'-( diphenylamino)-[l,l’-biphenyl]-3-carbonitrile) (B).
13. The cyano-derivatized oligonophenylacetylene-based fluorescent small molecule according to Claim 1 , characterized in that in the general formulation,
- Xi and X2 is -0(CH2)CH(C8HI7)(CIOH2I) alkoxy group,
- Yi is -CN (cyano) group,
- Y2, Y3 and Y4 is H atom,
- a and b is 1,
- An is“benzene” aryl group,
- Ar2 is aromatic amine group 
which yield small molecule
4,4"-((2,5-bis((2-octyidodecyl)oksi)-l,4-phenylene)bis(ethyn-2,l- dil))bis(4'-(diphenylamino)-[l,l'-biphenyl]-3-carbonitrile) (C).
14. The cyano-derivatized oligonophenylacetylene-based fluorescent small molecule according to Claim 1 to Claim 13 characterized in that said molecule is used as the light-emitting active layer in the OLED device.