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苯胺类化合物对发光菌的毒性及定量构效

DOI: 10.3969/j.issn.1000-5013.2005.02.022, PP. 195-198

Keywords: 苯胺类化合物,发光菌,min-EC,QSAR,毒性机制

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Abstract:

测定13种苯胺类化合物,研究在pH值为5.0,7.0,9.0时对发光菌的急性毒性(15minEC50).应用两种理化参数logP和pKa,对毒性数据进行定量构效关系(QSARs)研究,探讨苯胺类化合物的毒性机制.结果表明,苯胺类化合物对发光菌的毒性随pH值的升高而增大,这与不同pH值下苯胺类化合物的电离程度有关.在相同pH值下,苯胺类化合物的毒性随取代基团的种类、个数及取代位置而不同.苯胺类化合物属于极性麻醉化合物,其对发光菌的毒性以亲电性为主,毒性可用logP和pKa来联合描述.

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