Prediction of nitrobenzene toxicity to the algae (Scenedesmus obliguus) by quantitative structure-toxicity relationship (QSTR) models with quantum chemical descriptors

被引：10

作者：

Bao, Yueping ^{[1
]}

Huang, Qiuying ^{[2
]}

Li, Yangyang ^{[1
]}

Li, Ning ^{[1
]}

He, Tiande ^{[1
]}

Feng, Chenghong ^{[1
]}

机构：

[1] Beijing Normal Univ, State Key Joint Lab Environm Simulat & Pollut Con, Sch Environm, Beijing 100875, Peoples R China

[2] Henan Polytech Inst, Dept Chem Engn, Nanyang 473009, Henan, Peoples R China

来源：

ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY | 2012年 / 33卷 / 01期

关键词：

Toxicity; Nitrobenzene; Quantitative structure-toxicity relationship (QSTR); Quantum chemical descriptors; Partial least squares (PLS); STRUCTURE-PROPERTY RELATIONSHIPS; RATE CONSTANTS; PHOTOLYSIS; PENTACHLOROPHENOL; DEGRADATION; HYDROXYL; LACCASE; MICE;

D O I：

10.1016/j.etap.2011.09.003

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this study, Quantitative structure-toxicity relationship (QSTR) models were developed to predict the toxicity of nitrobenzene to the algae (Scenedesmus obliguus). Quantum chemical descriptors computed by PM3 Hamiltonian were used as predictor variables. The cross-validated Q(cum)(2) value for the optimal QSTR models is 0.867, indicating good predictive capability. The toxicity of nitrobenzenes (pC) was found to be affected by the molecular structure, the heat of formation (Delta H-f) and dipole moment (mu(z)). Contrary to the mu(z) values of nitrobenzenes, the Delta H-f values increase with increase in pC values and the energy of the highest occupied molecular orbital. Increasing the largest positive atomic charge on a nitrogen atom and the most positive net atomic charge on a hydrogen atom of the nitrobenzene leads to decrease in pC values. Nitrobenzenes with larger absolute hardness tend to be more stable and less toxic to the algae. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：39 / 45

页数：7

共 28 条

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