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Novel Herbicide Ionic liquids based on nicosulfuron with increased efficacy


Nicosulfuron has been widely used in agriculture because of its high selectivity, wide weeding spectrum and excellent herbicide performance. However, it is necessary to add adjuvants to make nicosulfuron stabilized so as to maximize its weed control efficacy. In this study, five novel herbicidal ionic liquids (HIL1-5) based on nicosulfuron were synthesized through acid-base reaction by pairing with tetrabutylammonium, benzyltriethylammonium, 2-hydroxyethyltrimethylammonium, hexadecyltrimethylammonium, hexadecypyridinium, which represents different types of cations with short-chain branched hydrocarbon, long-chain branched hydrocarbon, fused heterocycle and aromatic hydrocarbon, respectively. The results show that HILs had low solubility and surface tension, moderate octanol-water partition coefficient, which could reduce the risk of leaching and polluting the water environment to some extent. Nicosulfuron-based herbicidal ionic liquids were more stable than the nicosulfuron under high temperature and ultraviolet radiation and the stability of herbicidal ionic liquids followed the order of HIL5 > HIL1 > HIL3 > HIL2 > HIL4. HIL5 without any adjuvants exhibited a better control efficacy against gramineous and broadleaf weeds than nicosulfuron. The results showed that the physicochemical property of herbicide can be optimized by selecting suitable paired ions to solve the problems existing in the practical application and reduce the negative impact on the environment.

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Publication details

The article was accepted on 23 Nov 2018 and first published on 27 Nov 2018

Article type: Paper
DOI: 10.1039/C8NJ05903A
Citation: New J. Chem., 2018, Accepted Manuscript
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    Novel Herbicide Ionic liquids based on nicosulfuron with increased efficacy

    W. Wang, J. Zhu, G. Tang, H. Huo, W. Zhang, Y. Liang, H. Dong, J. Yang and Y. S. Cao, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ05903A

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