The enhanced biological activities of three Zn (II) complexes based on different 1,2,4‐triazole fungicides

Abstract

In order to screen effective fungicides, three Zn (II) complexes, [ZnL14 (NO3)2]·2H2O·2EtOH (1), [ZnL24 (NO3)2] (2), and [ZnL34 (DMF)2](NO3)2 (3), (L1 = paclobutrazol, L2 = diniconazole, and L3 = 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.

A chemically robust amine-grafted Zn(ii)-based smart supramolecular gel as a regenerative platform for trace discrimination of nitro-antibiotics and assorted environmental toxins

“…The aforesaid observation reveals that the DAT ligands are coordinated with metal ions in ZnGel . 32 Minor shifts in the amine bands attest to the participation of intermolecular hydrogen bonding in ZnGel , which was reduced in ZnXero . The PXRD patterns of ZnGel and ZnXero corroborated a similar crystalline nature, demonstrating the fact that solvent removal during xerogel formation does not induce a structural collapse in the material (Fig.…”

Conversion of fungicide cyprodinil to salts with organic acids: preparation, characterization, advantages

“…Acetonitrile of gradient grade for High-performance liquid chromatography (HPLC) was bought from J. T. Baker. 1 H and 13 C NMR data was tested by BRUKER AVANCE III HD 500 MHz. Melting points were tested on WRS-2C digital melting point apparatus (INESA, China).…”

“…The preparation method was simple and easy to operate. The structures of CYP-Salts determined by 1 H NMR and 13 C NMR are shown in Scheme 1. The ratios between the peak areas of cyprodinil and those of three citrates were 1:1, 1:2 and 1:3.…”

“…However, Juliusz Pernak et al have been studying herbicide ionic liquids based on commercial herbicides to reduce environmental risks since 2011. 6,7 Up until now, research on agricultural antifungal salts has still mainly focused on the traditional quaternary ammonium ionic liquids [8][9][10][11] and heavy metal complexes [12][13][14][15] (Cu(II), Zn(II), Mn(II),Ag(I) etc.). The use of these heavy metal complexes can aggravate the environment pollution 16 and harm nontarget organisms.…”