Abstract
In this work, we report a conceptual strategy for preventing pesticide degradation using cucurbit[n]uril to encapsulate pyroquilon (Pyn). The host–guest inclusion complexes of pyroquilon (Pyn) with CB[7] and CB[8] were prepared and characterized using 1H NMR spectroscopy, quadrupole-time of flight mass spectrometry (Q-TOF), isothermal titration calorimetry (ITC) and UV absorbance spectrophotometry. The experimental results revealed that the entire Pyn molecule resides within the cavities of CB[7] and CB[8], forming 1:1 inclusion complexes between CB[n] and Pyn. Our study on the release of Pyn demonstrated that CB[n]@Pyn exhibit sustained- and slow-release properties. Moreover, CB[8] can effectively shield UV irradiation and thereby protect the Pyn from photodegradation. Therefore, CB[7]@Pyn and CB[8]@Pyn have great potential to be used as slow-release agents.
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Acknowledgements
We acknowledge the support of the “Chun Hui” Project of the Chinese Ministry of Education (No. Z2017001), the Creative Research Groups of Guizhou Provincial Education Department (2017-028), the Science and Technology Program of Guizhou Province (No. 20185781), and the Innovation Program for High-level Talents of Guizhou Province (No. 2016-5657).
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Fan, Y., Gao, R., Jiang, Y. et al. Interaction of pesticide pyroquilon with two different cucurbit[n]uril. J Incl Phenom Macrocycl Chem 95, 207–213 (2019). https://doi.org/10.1007/s10847-019-00936-4
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DOI: https://doi.org/10.1007/s10847-019-00936-4