Tetranuclear NIR luminescent Schiff-base zn-nd complexes

With the simple dinuclear Zn-Nd complex [ZnNdL(H2O)(NO3)(3)] (1) (H2L = N,N'-bis-(3-methoxysalicylidene)ethylene-1,2-diamine) as the precursor, tetranuclear [Zn2Nd2L2-(4,4'-bpy)(NO3)(6)] center dot Et2O (2) and [Zn2Nd2L2(4,4'-bpe)] center dot 2H(2)O (3) (4,4'-bpy = 4,4'-bipyridine, 4,4'-bpe = trans-bis(4-pyridyl)ethylene) complexes are formed: suitable choice of bidentate linkers could construct multinuclear heterometallic 3d-4f Schiff-base complexes with improved luminescent properties, and the controlling of linker character shows a potentially effective way to the fine-tuning properties of NIR luminescence from Nd ions.