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Metal-organic coordination architectures of bis(N-imidazolyl) pyridazine: Syntheses, structures, emission and photocatalytic properties
In efforts to explore the effects of metal ions, counter anions on the structures and properties of metal-organic complexes, seven new complexes [ZnL4(OH)2] (1), {[ZnL(AcO)2](CH3CH2OH)}? (2), {[ZnL(H2O)4](SO4)}? (3), [CdL4(OH)2] (4), {[CdL(AcO)2](CH3CH2OH)}? (5), {[CdL(H2O)4](SiF6)}? (6) and {[Cu2L2(SO4)2(H2O)2](H2O)}? (7) [L = 3,6-bis(N-imidazolyl) pyridazine] were synthesized and structurally characterized by elemental analyses, IR spectroscopy and single-crystal X-ray diffraction. Complexes 1 and 4 have similar mononuclear structures. Complexes 2, 3 and 6 have 1-D chain structures, while 5 reveals 2-D neutral infinite sheet structure. One 1-D chain and one 2-D sheet form complicated structure of complex 7. The ligands L adopt didentate bridging mode to coordinate to the metal ions in complexes 2, 3, and 5-7. Obviously, the structural differences among them are attributable to the differences of metal ions, counter anions and coordination modes of ligand. The fluorescent property of complexes 1-6 have been investigated and discussed. In addition, complexes 1-5 exhibit photocatalytic activity and selectivity for dye degradation under UV light.
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Reference£º
Pyridazine – Wikipedia,
Pyridazine | C4H4N1943 – PubChem