二甲胺
硫酸
化学
氨
无机化学
胺气处理
粒子(生态学)
星团(航天器)
三甲胺
基础(拓扑)
质子化
有机化学
离子
数学分析
地质学
程序设计语言
海洋学
计算机科学
数学
作者
Nanna Myllys,Sabrina Chee,Tinja Olenius,Michael J. Lawler,James N. Smith
标识
DOI:10.1021/acs.jpca.9b00909
摘要
The abundance and basicity of a stabilizing base have shown to be key factors in sulfuric acid driven atmospheric new-particle formation. However, since experiments indicate that a low concentration of ammonia enhances particle formation from sulfuric acid and dimethylamine, which is a stronger base, there must be additional factors affecting the particle formation efficiency. Using quantum chemistry, we provide a molecular-level explanation for the synergistic effects in sulfuric acid–dimethylamine–ammonia cluster formation. Because of the capability of ammonia to form more intermolecular interactions than dimethylamine, it can act as a bridge-former in sulfuric acid–dimethylamine clusters. In many cluster compositions, ammonia is more likely to be protonated than dimethylamine, although it is a weaker base. By nanoparticle formation rate simulations, we show that due to the synergistic effects, ammonia can increase the particle formation rate by up to 5 orders of magnitude compared to the two-component sulfuric acid–amine system.
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