| abstract |
The present invention concerns compound of formula (I):n nwherein: n- A represents an electron-withdrawing group; n- D represents an electron-donating group; n- X is selected from the group consisting of: O, S and NR, wherein R is selected from the group consisting of: H, an alkyl group preferably comprising from 1 to 20 carbon atoms, an aryl group preferably comprising from 6 to 22 carbon atoms, and a heteroaryl group; n- n is an integer from 1 to 4; n- m is an integer from 1 to 6, preferably from 1 to 4;n nrepresents a condensed bicyclic aromatic radical comprising from 6 to 22 carbon atoms, and optionally from 1 to 3 heteroatom(s) selected from the group consisting of: N, S and O; nthe OH group being in ortho position of the condensed bicyclic aromatic radical nrelative to then nradical. n The present invention also concerns its uses, and light devices comprising them. |