Patent ID: 7682708

Claim:
A compound of the formula: where x is 3, 2 or 1, y is 0 or 1, n 1 and n 2 , which may be the same or different, are 0 or 1 to 3, X represents a divalent mono- or poly-aromatic or a divalent mono- or poly-heteroaromatic moiety or combinations thereof, the or each Y, which may be the same or different if x is 1, represents hydrogen or an optionally substituted hydrocarbon group, Z represents an at least partly conjugated dendritic molecular structure comprising one or more aromatic or heteroaromatic groups or combinations thereof, the aromatic or heteroaromatic groups or combinations thereof being connected to each other directly from a ring carbon atom of an aromatic or heteroaromatic group to a ring carbon atom of another aromatic or heteroaromatic group, said molecular structure being connected to the remainder of the molecule via a ring carbon atom, one or more of the distal aryl or heteroaryl rings optionally being substituted by one or more surface groups, wherein Z or the remainder of the molecule, or both Z and the remainder of the molecule excluding any groups Y, are luminescent.