| abstract |
Compound of the following formula (I): **(See formula)** in which: - PAr indicates a polyaromatic group comprising at least two condensed aromatic hydrocarbon rings, each of said condensed aromatic rings being optionally substituted with a or more carbon chains, the same or different, independent from each other, aliphatic or aromatic, linear, branched or cyclic, optionally substituted or interrupted by one or more heteroatoms; - Sp represents an atom or a group of atoms. |