Surface behavior of malonic acid adsorption at the air/water interface

Blower P.G.; Shamay E.; Kringle L.; Ota S.T.; Richmond G.L.

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Surface behavior of malonic acid adsorption at the air/water interface

机译：丙二酸在空气/水界面吸附的表面行为

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The presence of organic materials adsorbed to the surfaces of aerosol particles has been demonstrated to be a determining factor in relevant atmospheric processes. Malonic acid is a small, water-soluble organic acid that is common in aerosols and is surface-active. A comprehensive investigation of the adsorption of malonic acid to the air/water interface was accomplished using vibrational sum frequency spectroscopy (VSFS) and surface tension measurements as functions of concentration and pH. Malonic acid was found to be weakly solvated at the air/water interface, and its orientation as a function of concentration was explored through different VSFS polarization schemes. pH-dependent experiments revealed that the surface-active species is the fully protonated species. Computational analyses were used to obtain depth-specific geometries of malonic acid at the air/water interface that confirm and enrich the experimental results.

机译：已证明吸附到气溶胶颗粒表面的有机材料的存在是相关大气过程中的决定性因素。丙二酸是一种小的水溶性有机酸，在气溶胶中很常见并且具有表面活性。使用振动总和光谱（VSFS）和表面张力测量值作为浓度和pH的函数，对丙二酸在空气/水界面的吸附进行了全面研究。发现丙二酸在空气/水界面弱溶剂化，并通过不同的VSFS极化方案探索了其作为浓度的函数的方向。 pH依赖性实验表明，表面活性物质是完全质子化的物质。计算分析被用于获得在空气/水界面处丙二酸的深度特定的几何结构，证实并丰富了实验结果。

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《The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory》 |2013年第12期|共14页
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Blower P.G.; Shamay E.; Kringle L.; Ota S.T.; Richmond G.L.;
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Surface behavior of malonic acid adsorption at the air/water interface

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