Study of a new 3D MOF and its adsorption, slow release and biological activity in water-soluble and oil-soluble pesticides

The ligands of (E)-bis(p-3-nitrobenzoic acid) vinyl (C16H10N2O8) were synthesized in three steps, and then the MOF-Zn-2(EBNB)(2)(BPY)(2)center dot 2H(2)O was synthesized by solvothermal method. This structure was characterized by X-ray single crystal diffraction, SEM and TG. The pesticide loading and release of Zn-2(EBNB)(2)(BPY)(2)center dot 2H(2)O were also studied with jinggangmycin and avermectin as model pesticides, representing water-soluble and oil-soluble pesticides respectively. The results show that the highest loading amount of Zn-2(EBNB)(2)(BPY)(2)center dot 2H(2)O to jinggangmycin and avermectin was 0.346 g/g and 0.304 g/g. The pesticide delivery system was a two-phase mode and the cumulative release of jinggangmycin was 76.8%, of avermectin was 73.8% in 84 h, which show obvious slow release effect. Meanwhile, compared with the control group of jinggangmycin center dot avermectin wettable powder, the sustained-release system has better effect on the inhibition of rhizoctonia graminearum. (C) 2020 Elsevier Ltd. All rights reserved.