Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1404803 | Journal of Molecular Structure | 2016 | 5 Pages |
•Synthesis of a new complex with 2,2′-bipyridine-5,5′-dicarboxylic acid (H2bpdc) and SrCl2 under hydrothermal condition.•Detail study of crystal structure and their packing.•The comparison of solid-state fluorescence spectra among title compound and free H2bpdc shows that title compound exist a large red-shifted emission compared to free ligand.•The powder XRD shows the single phases of title compound.
Solvothermal reaction of 2,2′-bipyridine-5,5′-dicarboxylic acid (H2bpdc) and SrCl2 affords a novel coordination polymer [Sr(Hbpdc)2]n1. X-ray structure determination shows that 1 exhibits a novel three-dimensional network. The unique Sr II cation sits on a two-fold axis and coordinated by four O-atom donors from four Hbptc− ligands and four N-atom donors from two Hbptc− ligands in distorted dodecahedral geometry. In 1 each Sr II cation connects to six different Hbptc− ligands and each Hbptc− ligand bridges three different Sr II cations which results in the formation of a three-dimensional polymeric structure. Corresponding to the free ligand, the fluorescent emission of complex 1 display remarkable “Einstain” shifts, which may be attributed to the coordination interaction of Sr atoms, thus reduce the rigidity of pyridyl rings.
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