Patent ID: 7276299

Claim:
A semiconducting device other than a light emitting device, the semiconducting device comprising 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 moiety or a divalent mono- or poly-heteroaromatic moiety, 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 aromatic group, or an at least partly conjugated dendritic molecular structure, the at least partly conjugated molecular structure comprising one or more aromatic or heteroaromatic groups or combinations thereof and optionally additionally comprising alkenylene groups, connected to each other either via a carbon atom of an heteroaromatic group to a ring carbon atom of another (hetero) aromatic group or, if an alkenylene group is present via a ring carbon atom of an (hetero)aromatic group to a carbon atom of an alkenylene group, said dendritic molecular structure being connected to the remainder of the molecule via a ring carbon atom of an (hetero)aromatic group to which more than one at least partly conjugated dendritic chain is attached, one or more of the (hetero)aromatic rings of the dendrimers optionally being substituted, the group Z optionally further comprising at least one surface group attached to a distal aryl ring carbon, where Z or the remainder of the molecule or both, excluding any groups Y, is luminescent, with the proviso that when n 2 is 0, x must be 3.