数字农科院2.0

Utilizing imazalil-prepared nano-BUAP2 coordination polymer for Alternaria nees control: a pH-responsive release approach

文献类型： 外文期刊

作者： Zhu, Gao-Sheng;Xu, Zhen-Hang;Lan, Shao-Zhan;Jia, Yue;Gao, Wa;Liang, Dan;Ye, Jian-Xin;Yu, Bao-Yi;Shang, Qiao-Xia

作者机构：

关键词： pH-responsive CP;controlled release;alternaria-targeting agriculture;precision farming;fungicide delivery

期刊名称： JOURNAL OF COORDINATION CHEMISTRY

ISSN： 0095-8972

年卷期： 2025 年

页码：

收录情况： SCIE（2025版）

摘要： Innovative delivery mechanisms for fungicides offer a valuable strategy to boost agricultural efficiency through the controlled release of active substances. A new coordination polymer (with a average particle size at 298 nm), [Zn(IPA)(IMZ)2]n (BUAP2), was easily created using isophthalic acid (H2IPA), the fungicide imazalil (IMZ), and ZnSO4. The structure and composition were validated through various characterization techniques, confirming both the stability of the coordination polymer and the preservation of the encapsulated biocide. Analysis of the Hirshfeld surface and Mayer bond order calculations provided additional evidence of the non-covalent interactions present within the polymer. The fungicide content in BUAP2 was calculated at 72.1%, with a loading efficiency of 89.0%. BUAP2 exhibited enhanced resistance to UV-radiation compared to free IMZ. Furthermore, BUAP2 displayed pH-responsive release characteristics in water, with a higher dissociation rate at pH 5 compared to pH 7 and 9. The kinetics of IMZ release from BUAP2 were assessed under varying pH levels and were found to conform to the Korsmeyer-Peppas model. Tests on the release rate indicated that the system could nearly fully release the immobilized active ingredient at low suspension concentrations. BUAP2 showed significant antifungal efficacy against the Alternaria nees strain, with EC50 values recorded at 0.51 mu g/mL.

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