在大气相关的酸集群中,,和共价键之间的竞争
Nicoline C Frederiks1, Danika D Heaney1, John J Kreinbihl1
1Department of Chemistry, Stony Brook University, 100 Nicolls Rd., Stony Brook, New York11794, United States.
Journal of the American Chemical Society
|January 3, 2023
概括
氨有助于形成含的团,这对新颗粒形成至关重要. 这些集群,包括酸和氧化,优先形成强和共价键,影响大气化学.
科学领域:
- 大气化学
- 化学物理
背景情况:
- 新粒子形成 (NPF) 是影响空气质量和气候的关键大气过程.
- 含的化合物在NPF中的作用越来越被认可,特别是在沿海和极地地区.
研究的目的:
- 阐明中介NPF中涉及的小阴离子集群的结构性质.
- 调查氨在稳定和促进这些基的作用.
主要方法:
- 使用红外光谱探测星团的振动模式.
- 使用量子化学计算来确定稳定的集群结构和结合偏好.
主要成果:
- 确定了五种不同的阴离子集群结构,包括氨,酸和氧化.
- 其中四个结构更喜欢形成和/或共价键而不是键.
- 发现氨有助于质子转移,并作为强大的集群脊柱的模板.
结论:
- 氨在含集群的结构组织和生长中起着至关重要的作用.
- 在较大的星团中形成强的共价键,包括一个共价I3离子,突出了大气星团中的新型结合机制.
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