Predicting enthalpy of vaporization for Persistent Organic Pollutants with Quantitative Structure-Property Relationship (QSPR) incorporating the influence of temperature on volatility

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• 作者：Anita Sosnowska^a ; Maciej Barycki^a ; Karolina Jagiello^a ; Maciej Haranczyk^b ; Agnieszka Gajewicz^a ; Toru Kawai^c ; Noriyuki Suzuki^c ; Tomasz Puzyn^a ; ^{t.puzyn@qsar.eu.org" class="auth_mail} ; ^{puzi@qsar.eu.org" class="auth_mail}
• 关键词：Persistent Organic Pollutants ; Enthalpy of vaporization ; QSPR ; Temperature dependence ; Quantum-mechanical descriptors
• 刊名：Atmospheric Environment
• 出版年：April, 2014
• 年：2014
• 卷：87
• 期：Complete
• 页码：10-18
• 全文大小：1859 K

文摘

Enthalpy of vaporization (螖H_vap) is a thermodynamic property associated with the dispersal of Persistent Organic Pollutants (POPs) in the environment. Common problem in the environmental risk assessment studies is the lack of experimentally measured 螖H_vap data. This problem can be solved by employing computational techniques, including QSPR (Quantitative Structure-Property Relationship) modelling to predict properties of interest. Majority of the published QSPR models can be applied to predict the enthalpy of vaporization of compounds from only one, particular group of POPs (i.e., polychlorinated biphenyls, PCBs). We have developed a more general QSPR model to estimate the 螖H_vap values for 1436 polychlorinated and polybrominated benzenes, biphenyls, dibenzo-p-dioxins, dibenzofurans, diphenyl ethers, and naphthalenes. The QSPR model developed with Multiple Linear Regression analysis was characterized by satisfactory goodness-of-fit, robustness and the external predictive performance (R²聽=聽0.888, , , RMSE_C聽=聽5.11, RMSE_CV聽=聽5.34, RMSE_P聽=聽5.74). Moreover, we quantified the temperature dependencies of vapour pressure for twelve groups of POPs based on the predictions at six different temperatures (logP_L(T)). In addition, we found a simple arithmetic relationship between the logarithmic values of vapour pressure in pairs of chloro- and bromo-analogues. By employing this relationship it is possible to estimate logP_L(T) for any brominated POP at any temperature utilizing only the logP_L(T) value for its chlorinated analogues.