Functionalized 1,2,3-Triazoles as Building Blocks for Photoluminescent POLOs (Polymers of Oligomers) of Copper(I)
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Two 3-D and one 2-D metal-organic frameworks [Cu8I8(L1)4]n (1), [Cu8I8(L2)4]n (2) and [Cu4I4(L3)2]n (3) were synthesized using three novel pyridine and pyrazole supported 1,2,3-triazoles, 1-(4-picolyl)-4-butyl-1H-1,2,3-triazole (L1), 1-(4-picolyl)-4-pentyl-1H-1,2,3-triazole (L2) and 1-(4-picolyl)-4-(3,5-dimethylpyrazolylmethyl)-1H-1,2,3-triazole (L3). In both complexes 1 and 2, there co-exist a 1-D Cu(I) oligomer and Cu4 tetrahedron cluster in the 3-D polymeric structures. Complex 3 shows a 2-D (4, 4) net with the stair-step Cu4I4 as node and L3 as a building block. All three complexes exhibit photoluminescence.
Transition Metal Chemistry