邻苯二甲酸酯类化合物正辛醇-水分配系数的QSPR研究 |
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中文关键词 邻苯二甲酸酯(PAEs) 定量结构-性质相关(QSPR) 正辛醇-水分配系数(KOW) PM3算法 偏最小二乘(PLS) |
英文关键词 phthalic acid esters (PAEs) quantitative structure-property relationship (QSPR) n-octanol/water partition coefficients (KOW) PM3 partial least squares (PLS) |
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中文摘要 |
采用PM3算法计算邻苯二甲酸酯类化合物(PAEs)的量子化学参数,应用偏最小二乘(PLS)算法建立了PAEs的正辛醇-水分配系数(KOW)的定量结构-性质相关(QSPR)模型.模型的结果表明,用量子化学参数建立的QSPR模型相关性显著,具有较好的稳健性和预测能力,因此,利用该模型可对其他PAEs分子的lgKOW值进行初步预测.模型的结果表明,影响lgKOW的主要量子化学参数是分子总能量TE、相对分子质量Mr、平均分子极化率α和分子生成热ΔHf.lgKOW随着Mr和α的增大而增大,随着TE和ΔHf的增大而减小. |
英文摘要 |
Quantum chemical parameters based on the PM3 method were calculated for phthalic acid esters (PAEs). Using partial least squares (PLS) algorithm, a quantitative structure-property relationships (QSAR) model for the n-octanol/water partition coefficients (KOW) of PAEs was developed. The result indicates that the model has a good stability and predicting ability. It can be concluded from this study that the main factors affecting lgKOW of PAEs are total energy (TE), relative molecular weight (Mr), average molecular polarizability (α) and standard heat of formation (ΔHf). The lgKOW values increase with increasing Mr and α values. In contrast, increasing TE and ΔHf values leads to the decrease of lgKOW. |