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-Zn2(EBNB)2(BPY)2·2H2O was synthesized by solvothermal method. This structure was characterized by X-ray single crystal diffraction, SEM and TG. The pesticide loading and release of Zn2(EBNB)2(BPY)2·2H2O 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 Zn2(EBNB)2(BPY)2·2H2O 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·avermectin wettable powder, the sustained-release system has better effect on the inhibition of rhizoctonia graminearum.