Patent ID: 7960557

Claim:
A light emitting dendrimer having the formula: CORE-[DENDRITE 1 ] n [DENDRITE 2 ] m in which CORE represents an atom or group, n and m, which may be the same or different, each represent an integer of at least 1, each DENDRITE 1 , which may be the same or different when n is greater than 1, and each DENDRITE 2 , which may be the same or different when no is greater than 1, represent dendritic structures, at least one of said structures being fully conjugated and comprising aryl and/or heteroaryl groups and, optionally, vinyl and/or acetylenyl groups, connected via sp 2 or sp hybridized carbon atoms of said aryl, heteroaryl, vinyl and acetylenyl groups, and at least one branching point and/or link between branching points in DENDRITE 1 being different from those in DENDRITE 2 , CORE terminating in the single bond which is connected to a sp 2 hybridized (ring) carbon atom of the first (hetero)aryl group to which more than one conjugated dendritic branch is attached, said ring carbon atom forming part of said fully conjugated DENDRITE 1 or DENDRITE 2 and CORE terminating at the single bond to the first branching point for the other of said DENDRITE 1 or DENDRITE 2 , at least one of the CORE, DENDRITE 1 and DENDRITE 2 being luminescent, wherein the dendrimer is luminescent in the solid state.