SO2と水 Nanodropletの表面との相互作用
Jie Zhong1, Chongqin Zhu1, Lei Li1
1Department of Chemistry, University of Nebraska-Lincoln , Lincoln, Nebraska 68588, United States.
Journal of the American Chemical Society
|October 31, 2017
まとめ
水と二酸化硫黄 (SO2) の相互作用は,ガス段階から滴面への変化です. 水滴の大きさはSO2溶解に影響し,大気化学とエアロゾール研究に影響します.
科学分野:
- 大気化学
- コンピュータ化学
- 物理化学
背景:
- 二酸化硫黄 (SO2) は重要な大気汚染物質です. その解き方を理解することは 大気化学にとって極めて重要です
- 以前の研究では,SO2と水の相互作用を理解するために0Kでの密度関数理論 (DFT) を使用しました.
- "J"のスペクトロスコーピーの証拠 そうだ 化学について ソック SO2と水の相互作用に関する研究を支援しています.
研究 の 目的:
- ガス相とナノドロップレットの水との相互作用を計算的に調査する.
- 多様な大気環境における SO2 溶解の振る舞いを調査する.
- SO2の相互作用に対する水面とドロップレットの大きさの影響を理解する.
主な方法:
- ボーン・オッペンハイマー分子動力学 (BOMD) のシミュレーションが採用された.
- SO2を気相で300Kでシミュレーションを行った.
- シミュレーションには,SO2が様々なサイズのナノドロップレットと相互作用することが含まれています.
主要な成果:
- ガス相では,SO2−水相互作用がS··Oによって支配される.
- 水のナノドロップレットでは,水素結合 (O··H) がドロップレットサイズが大きくなるにつれて支配的になる.
- 空気-水界面での好ましいH原子の曝露は,支配的相互作用のシフトを誘導する.
結論:
- 主要なSO2と水の相互作用がガスからドロップレット表面に変化すると,SO2の化学反応に影響する.
- 水面でのSO2溶解は,その反応部位と電離性に影響する.
- この発見は,大気中のエアロゾールとトロポスフィアのSO2化学の研究に意味があります.
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