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化工学报  2015 

正构烷基酚热力学性质的构效关系

DOI: 10.11949/j.issn.0438-1157.20140903, PP. 67-78

Keywords: 污染,热力学性质,计算机模拟,有机化合物,预测

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Abstract:

选取了150种正构烷基酚的热力学性质作为分析对象。为了研究热力学性质的构效关系,引入并简化了主量子拓扑指数0P、1P。考虑到分子对称性对热力学性质的影响,为了方便量化对称程度,将烷基作为类原子处理,定义了烷基的折算点价和烷基相似度的计算方法,借助矩阵形式计算了烷基酚分子对称特征指数Q。将0P、1P、Q与苯环上烷基的数目T、苯环上相邻烷基的对数B作为分子描述符,利用方差膨胀因子VIF进行筛选,确定1P、T、B、Q作为构效关系模型的自变量。采用最佳变量子集回归方法,并根据Akaike信息判据、Kubinyi函数建立了热力学性质定量构效关系模型,所有模型的相关系数均大于99%,甚至达到100%。采用交叉验证方法对模型的稳健性和预测能力进行了检验,结果表明所建模型具有良好的稳健性和预测能力。

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