Accurate Computational Model for the Hydration Extent of Atmospherically Relevant Carbonyls on Aqueous Atmospheric Particles

Accurate Computational Model for the Hydration Extent of Atmospherically Relevant Carbonyls on Aqueous Atmospheric Particles
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大气相关羰基在大气水颗粒上的水合程度的精确计算模型

DOI:
10.1021/acsearthspacechem.0c00322
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发表时间:
2021
影响因子:
3.4
通讯作者:
Ren, He
Ren, He
中科院分区:
化学3区
文献类型:
--
作者:
Elrod, Matthew J.;Sedlak, Jane A.;Ren, He

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几个大气相关的羰基化合物的羰基水合平衡进行了研究,使用核磁共振(NMR)光谱和计算研究使用MG 2 MS电子结构方法。结果被用来建立一个经验调整的计算模型,导致在计算水合的自由能,准确到1千卡mol-1。新的模型被用来预测其他潜在的大气相关的羰基化合物,没有实验数据存在的水合程度。由于羰基化合物的水化程度显着影响其有效挥发性和亨利定律的溶解度,更准确的估计羰基水合程度预测这个新的模型将有助于提高我们的理解,其中羰基化合物是含水大气颗粒物的主要成分。
The carbonyl hydration equilibria of several atmospherically relevant carbonyl compounds were studied using nuclear magnetic resonance (NMR) spectroscopy and computationally investigated using the MG2MS electronic structure method. The results were used to build an empirically adjusted computational model that resulted in the calculation of free energies of hydration that were accurate to within 1 kcal mol–1. The new model was used to predict the hydration extent of other potentially atmospherically relevant carbonyl compounds for which no experimental data exists. Because the hydration extent of a carbonyl compound dramatically affects its effective volatility and Henry’s law solubility, the more accurate estimates for the extent of carbonyl hydration predicted by this new model will help improve our understanding of which carbonyl compounds are major constituents of aqueous atmospheric particles.
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DOI: --
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