Bisphenylene-spirobifluorene compounds, method for synthesizing the same, and electroluminescence material and device having the same
View Patent ↗Bisphenylene-spirobifluorene compounds, a method for synthesizing the same, and EL material and device having the same. The bisphenylene-spirobifluorene compound is defined by the following formula: wherein R 1 and R 2 are identical or different and are independently a straight-chain or branched alkyl group having from 1 to 22 carbon atoms, X 1 and X 2 independently contains one or more elements selected from the group consisting of C, O, N, S, Si and Ge, and m and n are integers from 1 to 4.
1. A bisphenylene-spirobifluorene compound defined by the following formula:
wherein R 1 and R 2 are identical or different and are independently a straight-chain or branched alkyl group having from 1 to 22 carbon atoms, X 1 and X 2 are and m and n are integers from 1 to 2.
2. The bisphenylene-spirobifluorene compound according to claim 1 , wherein X 1 X 2 and X 2 X 2 are at 1', 6'-positions.
3. The bidphenylene-spirobifluorene compound according to claim 1 , wherein X 1 R 1 and X 1 R 2 and at 1', 6'-positions.
4. An electroluminescence (EL) material comprising the bisphenylene-spirobifluorene compound claimed in any one of claims 1 through 3 .
5. The EL material according to claim 4 , wherein the bisphenylene-spirobifluorene compound is contained in an amount of 10% by weight or more.
6. An electroluminescence (EL) device comprising:
a cathode;
an anode; and
a light-emitting layer interposed between the cathode and the anode and containing the bisphenylene-spirobifluorene compound as claimed in one of claims 1 through 3 .
7. The EL device according to claim 6 , wherein the bisphenylene-spirobifluorene compound is contained in the light emitting layer in an amount of 10% to 100% by weight.