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Synthesis, structural features and biological activities of three asymmetric pyridazine–triazole coordination polymers

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Abstract

The complexes [CuL2Cl2]n (1), [CoL2Cl2(H2O)2]·L (2) and [MnL2Cl2(H2O)2]·L (3) (L = 3-chloro-6-(1H-1,2,4-triazol-1-yl) pyridazine) were synthesized and characterized by physicochemical and spectroscopic methods. X-ray crystallographic analysis reveals that the Cu(II) center of complex 1 is located in a slightly distorted tetragonal pyramidal environment and bridged by chlorine atoms to generate infinite 1D chains, which are further connected into 2D supramolecular structures by C–H…Cl hydrogen bonds. The Co(II) and Mn(II) atoms in complexes 2 and 3 both have a distorted octahedral coordination sphere, and the crystal lattices include hydrogen bonds and π–π stacking interactions to yield 3D supramolecular frameworks. The antioxidant activities (influence on O2 •− and •OH) and antibacterial activities of the ligand L and its three complexes were also investigated.

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Acknowledgments

We are very grateful to the support of this study by the National Natural Science Foundation of China (No. 20871099) and Gansu provincial Natural Science Foundation of China (No. 0710RJZA113).

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Authors and Affiliations

  1. Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Bio Electrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, People’s Republic of China

    Ya-Qin Xu, Jia-Cheng Liu, Wen-Ting Deng & Jing Cao

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  1. Ya-Qin Xu
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  2. Jia-Cheng Liu
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  3. Wen-Ting Deng
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  4. Jing Cao
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Correspondence to Jia-Cheng Liu.

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Xu, YQ., Liu, JC., Deng, WT. et al. Synthesis, structural features and biological activities of three asymmetric pyridazine–triazole coordination polymers. Transition Met Chem 39, 25–32 (2014). https://doi.org/10.1007/s11243-013-9767-8

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  • DOI: https://doi.org/10.1007/s11243-013-9767-8

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