Patent ID: 7728137

Claim:
A compound of the structure 1, containing at least one metal Met, wherein Met is a transition metal, Group III metal or f-block metal, coordinated to a polypodal ligand Lig of the structure 2, where V is a bridging unit, characterized in that the three part-ligands L1, L2 and L3 which may be the same or different at each instance are covalently bonded to one another, and where V is CR, COH, COR 1 , CF, CCl, CBr, C—I, CN(R 1 ) 2 , RC(CR 2 ) 3 , RC(SiR 2 ) 3 ; R is the same or different at each instance and is H, F, Cl, Br, I, NO 2 , CN, a straight-chain or branched or cyclic alkyl or alkoxy group having from 1 to 20 carbon atoms, in which one or more nonadjacent CH 2 groups may be replaced by —R 1 C═CR 1 —, —C≡C—, Si(R 1 ) 2 , Ge(R 1 ) 2 , Sn(R 1 ) 2 , C═O, C═S, C═Se, C═NR 1 , —O—, —S—, —NR 1 — or —CONR 1 —, and in which one or more hydrogen atoms may be replaced by F, or an aryl or heteroaryl group which has from 1 to 14 carbon atoms and may be substituted by one or more nonaromatic R radicals, where a plurality of substituents R, both on the same ring and on the two different rings, together may in turn form a further mono- or polycyclic, aliphatic or aromatic ring system; R 1 is the same or different at each instance and is an aliphatic or aromatic hydrocarbon radical having from 1 to 20 carbon atoms; and where the three part-ligands L1, L2 and L3 satisfy the structure 3 where Cy1 is a substituted or unsubstituted 2-pyridyl connected to V and Cy2 are the same or different at each instance and correspond to substituted or unsubstituted aromatic homocycles of carbon or substituted or unsubstituted aromatic heterocycles, which are each bonded ionically, covalently or coordinatively to the metal via a ring atom or via an atom bonded exocyclically to the homo- or heterocycle, the zig-zag line is a direct bond linkage between Cy1 to Cy2, and that the compounds of the structure 1 are uncharged.