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A New Two-Dimensional Lead(II) Coordination Polymer Containing Left- and Right-Handed Helical Chains Constructed from 1H-Benzimidazole-2-carboxylic Acid

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Abstract

A new two-dimensional lead(II) coordination polymer, [Pb(C10H5N3O4)]n, was prepared by reacting lead nitrate with 1H-benzimidazole-2-carboxylic acid (H2BI2C) under solvothermal conditions. The asymmetric unit of the compound contains one crystallographically independent PbII cation and one unique BI2C2− dianion. The PbII ion is five-coordinated by three carboxylate O atoms and two imidazole N atoms from three different BI2C2− dianions, displaying an interesting hemidirected coordination. It is worth noting that the BI2C2− group acts as a μ 3-bridging ligand to link the PbII ions into a two-dimensional layer, which is composed of left- and right-handed helical chains. This two-dimensional layer can be simplified as a 3-connected fes topology with the Schläfli symbol of (4·82). In addition, the title compound shows an intense emission at 549 nm when excited at 353 nm, and it displays a high thermal stability up to 410 °C.

Graphical Abstract

A new lead(II) coordination polymer [Pb(C10H5N3O4)]n, which exhibits an interesting two-dimensional layer structure composed of left- and right-handed helical chains, was successfully obtained by reacting lead nitrate with 1H-benzimidazole-2-carboxylic acid (H2BI2C) under solvothermal conditions. This compound shows an intense green emission at room temperature and displays a high thermal stability up to 410 °C.

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Acknowledgments

The authors gratefully acknowledge the Science and Technology Research Project of Zhongshan City (Grant No. 20114A256).

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Correspondence to Ping-hui Li.

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Wang, J., Nie, Jh. & Li, Ph. A New Two-Dimensional Lead(II) Coordination Polymer Containing Left- and Right-Handed Helical Chains Constructed from 1H-Benzimidazole-2-carboxylic Acid. J Chem Crystallogr 44, 103–107 (2014). https://doi.org/10.1007/s10870-014-0490-x

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  • DOI: https://doi.org/10.1007/s10870-014-0490-x

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