The enhanced biological activities of three Zn (II) complexes based on different 1,2,4‐triazole fungicides |
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| Authors: | Guo‐yu Ren Jie Li Xu‐zhan Wei Jin‐hua Zhou Biao Yan Zhao‐qi Guo Ying‐hui Ren Xiao‐hong Sun Hai‐xia Ma |
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| Institution: | 1. School of Chemical Engineering, Northwest University/Shaanxi Key Laboratory of Physical‐Inorganic Chemistry, Xi'an, Shaanxi, China;2. School of Chemistry and Chemical Engineering, Yulin University/Laboratory of Low Metamorphic Coal Clean Utilization, Yulin, Shaanxi, China;3. College of Environmental Science and Engineering, Chang'an University, Xi'an, Shaanxi, China |
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| Abstract: | In order to screen effective fungicides, three Zn (II) complexes, Zn L 1 4 (NO3)2]·2H2O·2EtOH ( 1 ), Zn L 2 4 (NO3)2] ( 2 ), and Zn L 3 4 (DMF)2](NO3)2 ( 3 ), ( L 1 = paclobutrazol, L 2 = diniconazole, and L 3 = hexaconazole), were synthesized and characterized by elemental analysis, FT‐IR spectroscopy, and single‐crystal XRD. The antifungal activities of these complexes were then evaluated against four selected fungi using the mycelial growth rate method. The resulting data indicate that all the complexes show the enhanced antifungal activities than the corresponding ligand and mixtures. And, the interactions between the metal salt and ligands in the three complexes seem to be synergistic. According to the study of the influence of the structures on the activity, complex 2 with C=C linkage and 2,4‐dichlorophenyl moieties enhances the bioactivity significantly, especially against Wheat gibberellic ( II ). Density functional theory (DFT) calculations were carried out to help explain the enhanced bioactivity of the Zn (II) complexes. Meanwhile, all complexes are excellent grow‐regulators, especially complex 3 . The resulting data show that the complexes based on triazole fungicides have the potential applications in agriculture. |
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| Keywords: | crystal structures enhanced biological activities synergistic action Zn (II) complexes |
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