| Abstrakt: |
Abstract A luminescent trinuclear zinc(II) complex, tris(µ-2,3-toluenedithiolato)-1:2?2S1;1:2?2S1', 2:3?2S2;3?S2', 1:3?2S3;3?S3'-bis(2,2'-bypyridine)-1?2N,N',2?2N,N'-trizinc, containing 3,4-dimercaptotoluene (tdt) and 2,2'-bipyridine (bpy) has been synthesized and found to have the trinuclear formulation Zn3(tdt)3(bpy)2 (I). The complex crystallizes in the monoclinic space group P21/n with a = 11.7247(12), b = 20.134(2), c = 17.7376(18) Å and ß = 103.743(2)°. The complex has two heteroleptic zinc(II) centers exhibiting similar distorted trigonal bipyramidal geometries with the third homoleptic zinc(II) center displaying a flattened tetrahedral geometry. Present in the solid state are both intra- and intermolecular p–p interactions. The complex is emissive at 77 K in the solid state with an emission maximum at 574± 2 nm with a luminescence lifetime of 7.4± 0.4 ns. The unstructured emission is assigned as a metal-mediated ligand-to-ligand p–p* charge transfer transition. |
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