Thermodynamic properties and cloud droplet activation of a series of oxo-acids
Thermodynamic properties and cloud droplet activation of a series of oxo-acids
复制标题
一系列含氧酸的热力学性质和云滴活化
DOI：
10.5194/acp-10-5873-2010
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发表时间：
2010
影响因子：
6.3
通讯作者：
M. Bilde
中科院分区：
文献类型：
--
作者：
M. Frosch;A. Zardini;S. Platt;Ludovic Muller;M. Reinnig;T. Hoffmann;M. Bilde
摘要。我们研究了确定或认为存在于大气颗粒物中的四种脂肪族氧二羧酸的热力学性质：氧琥珀酸、2-氧戊二酸、3-氧戊二酸和4-氧戊二酸。这些化合物在云凝结核（CCN）活性、蒸汽压、密度和水溶液中脱羧酸的倾向方面进行了表征。我们部署了各种实验技术和仪器：CCN计数器，串联差分迁移率分析仪（TDMA）与层流管耦合，以及液相色谱/质谱法（LC/MS）。α-位置的氧官能团的存在使化合物的蒸气压相对于母体二羧酸降低了一个数量级，而CCN活性相似或增加。在β位置有氧基的二羧酸在水溶液中脱羧酸。我们研究了这个过程对我们的测量和结果的影响。
Abstract. We have investigated the thermodynamic properties of four aliphatic oxo-dicarboyxlic acids identified or thought to be present in atmospheric particulate matter: oxosuccinic acid, 2-oxoglutaric acid, 3-oxoglutaric acid, and 4-oxopimelic acid. The compounds were characterized in terms of their cloud condensation nuclei (CCN) activity, vapor pressure, density, and tendency to decarboxylate in aqueous solution. We deployed a variety of experimental techniques and instruments: a CCN counter, a Tandem Differential Mobililty Analyzer (TDMA) coupled with a laminar flow-tube, and liquid chromatography/mass spectrometry (LC/MS). The presence of the oxo functional group in the α-position causes the vapor pressure of the compounds to diminish by an order of magnitude with respect to the parent dicarboxylic acid, while the CCN activity is similar or increased. Dicarboxylic acids with an oxo-group in the β-position decarboxylate in aqueous solution. We studied the effects of this process on our measurements and findings.
影响因子：
3.8
作者：
Booth, A. M.;Markus, T.;Topping, D. O.
通讯作者：
Topping, D. O.
影响因子：
6.3
作者：
Booth, A. M.;Barley, M. H.;Percival, C. J.
通讯作者：
Percival, C. J.