Trifluralin (TRL) is an effective and persistent herbicide, but its extensive and prolonged use has increasingly posed ecological and environmental health risks, making the development of convenient and rapid TRL detection methods essential for environmental protection and food safety. In the present research, a novel fluorescent probe was designed and developed, Zn-χ-L, for the rapid and selective detection of TRL in complex environments. The sensor demonstrates excellent sensitivity and stability, while also exhibiting significant resistance to interference from other pesticides and metal ions. Moreover, Zn-χ-L exhibited stable performance across various solvents and showed resistance to interference from other pesticides and metal ions. Molecular docking and theoretical calculations indicate that the unique recognition of TRL molecules by Zn-χ-L is related to its specific hemispheric structural feature, which forms strong coordination interactions between Zn-χ-L and TRL through coordination bonds, π-π stacking, and halogen bonds. This special conformation not only enables the formation of coordination bonds but also establishes multiple π-π stacking and halogen bonding interactions between Zn-χ-L and TRL, leading to efficient charge transfer and exceptional probe performance.

中文翻译：

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独特的半球配位驱动的农药残留探针：增强 Trifluralin 线性识别的稳定性


三氟拉林 （TRL） 是一种有效且持久的除草剂，但其广泛和长期使用日益构成的生态和环境健康风险，使得开发方便、快速的 TRL 检测方法对环境保护和食品安全至关重要。在本研究中，设计并开发了一种新型荧光探针 Zn-χ-L，用于在复杂环境中快速、选择性地检测 TRL。该传感器具有出色的灵敏度和稳定性，同时还表现出对其他杀虫剂和金属离子干扰的显著抵抗力。此外，Zn-χ-L 在各种溶剂中表现出稳定的性能，并显示出对其他农药和金属离子的干扰的抵抗力。分子对接和理论计算表明，Zn-χ-L 对 TRL 分子的独特识别与其特定的半球结构特征有关，该特征通过配位键、π-π 堆叠和卤素键在 Zn-χ-L 和 TRL 之间形成强配位相互作用。这种特殊构象不仅能够形成配位键，而且还在 Zn-χ-L 和 TRL 之间建立多个π-π叠和卤素键相互作用，从而实现高效的电荷转移和卓越的探针性能。