The invention concerns a monomer of general formula A—(Q—S)p wherein: A=an aromatic or heteroaromatic ring; Q=a carbonaceous or siliceous divalent radical, respectively corresponding to general formulae: (CR1R2)n wherein: R1, R2=H, alkyl, alkenyl comprising between 1 to 4 carbon atoms and n ranges between 4 and 24; and [O—Si(R1R2)]n wherein R1, R2=H, alkyl, alkenyl comprising between 1 and 4 carbon atoms and n ranges between 3 and 24; S=a solvating segment consisting of at least an aliphatic chain comprising at least a polar heteroatom. 1≦p≦6. The invention also concerns the polymer (homopolymer or copolymer) incorporating said monomer, and their use in organic electroluminescent devices.