Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, School of Chemical Engineering and Technology, Hainan University, Haikou 570228, China.
College of Science, Hainan University, Haikou 570228, China.
Inorg Chem. 2022 Jun 27;61(25):9801-9807. doi: 10.1021/acs.inorgchem.2c01332. Epub 2022 Jun 13.
As an important factor affecting global agricultural output, pesticides have a significant impact on the ecosystem. It is an urgent task to accurately and conveniently detect pesticide residues after their application. Herein, a fluorescent dye@MOF platform was designed via the encapsulation of rhodamine B (RhB) into the MOF structure (named RhB@), which can significantly enhance the sensing sensitivity of alachlor with an ultralow detection limit of 0.59 ppb. The improved sensitivity of RhB@ to pesticides was attributed to the host-guest interactions that affect the excitation and emission spectra of the composites. Based on the sensing capability of RhB@, a logic gate was built to evaluate the safety level of alachlor residues in rivers and soil. The preparation of photofunctionalized MOF composites through modulation of host-guest interactions offers a promising strategy for the construction of desired sensors for agricultural residues.
作为影响全球农业产量的重要因素，农药对生态系统有重大影响。准确、便捷地检测出施药后的农药残留是当务之急。在此，通过将罗丹明 B（RhB）封装到 MOF 结构中（命名为 RhB@）设计了一个荧光染料@MOF 平台，该平台可以显著提高对甲草胺的传感灵敏度，检测限低至 0.59 ppb。RhB@对农药的灵敏度提高归因于主客体相互作用，这影响了复合材料的激发和发射光谱。基于 RhB@的传感能力，构建了一个逻辑门，用于评估河流和土壤中甲草胺残留的安全水平。通过调节主客体相互作用来制备光功能化 MOF 复合材料，为构建用于农业残留的理想传感器提供了一种很有前途的策略。
