Abstract
An axial substitution of the coordinated acetonitrile molecules in dinuclear Cu(I) compound, [Cu2(μ-PhPPy2)2(CH3CN)2](ClO4)2 (1) (PhPPy2 = bis(2-pyridyl)phenylphosphine) by various dicarboxylates (isophthalate, terephthalate and naphthalene-2,6-dicarboxylate) led to a class of new linear coordination polymers, {[Cu2(μ-PhPPy2)2](μ-1,3-C6H4(CO2)2)}∞ (2), {[Cu2(μ-PhPPy2)2](μ-1,4-C6H4(CO2)2)}∞ (3) and {[Cu2(μ-PhPPy2)2](μ-2,6-C12H6(CO2)2)}∞ (4). X-ray crystallographic studies reveals that all the polymers adopt almost linear structures, where the dicarboxylate groups connect dinuclear Cu(I) units as linkers. In 2 and 4, polymeric chains are parallel to each other. However the chains in 3 are arranged layer by layer, where polymeric chains are parallel in one layer, but chains in the neighboring layers are aligned with the angle (42°). The detailed structural analyses demonstrate that in solid state, the polymeric chains display different orientations which are controlled by interchain π–π and CH–π interactions. In solid state, all the coordination polymers are highly emissive at room temperature, which exhibit phosphorescence characteristics and are assigned as metal to ligand charge transfer.
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Acknowledgments
We gratefully acknowledge the National Natural Science Foundation of China for financial support (20871049, 21371064), and the Analytical and Testing Center, Huazhong University of Science and Technology for spectral measurements.
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Zhang, T., Wang, K., Ji, C. et al. Linear Coordination Polymers Assembled from Dinuclear Cu(I) Units: Interchain π–π and CH–π Interactions in Controlling Alignments of Polymeric Chains in Solid State. J Inorg Organomet Polym 24, 865–873 (2014). https://doi.org/10.1007/s10904-014-0051-y
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DOI: https://doi.org/10.1007/s10904-014-0051-y