Patent ID: 7902362

Claim:
A compound having the general formula (I): wherein each of L a and L b is independently selected from a linking moiety comprising 0 to 10 main chain atoms, optionally substituted; each of Z a and Z b is an independently selected complexing moiety comprising at least one nitrogen atom, wherein each of the complexing moieties Z a and Z b is a heterocycle selected from the group consisting of, pyrazine, acridine, azepine, aziridine, benzodiazine, bipyridine, diazine, isoquinoline, lactam, oxazine, phenanthridine, phenanthroline, piperazine, pteridine, purine, pyridine, pyrrole, pyrrolidine, quinoline, quinolizine, thiadiazine, thiazine, triazine and tropane; either both or one of Z a and/or Z b is coordinatively bonded to a respective transition metal complex M a V a and/or M b V b by said nitrogen atom, wherein each of M a and M b is an independently selected transition metal, wherein each of the transition metals M a and M b is independently selected from the group consisting of osmium, iron, rhenium, and platinum, and each of V a and V b is an independently selected valence group.