Loring J S, Land D P
Appl Opt. 1998 Jun 1;37(16):3515-26. doi: 10.1364/ao.37.003515.
We investigate the feasibility of overlayer attenuated-total-reflectance (O-ATR) infrared spectroscopy as a surface analytical tool for studying reactions and molecular properties of adsorbates at surfaces exposed to aqueous nonelectrolyte solutions. Through modeling an O-ATR system by assuming it to comprise three, four, or n phases of homogeneous refractive index, one can use an electric-field analysis to determine how the parameters of adsorption free energy, overlayer thickness, initial angle of incidence, and internal-reflection element refractive-index influence solvent-subtracted O-ATR infrared-absorption spectra. The theory behind such an analysis is explained, and the results of its application are presented for hypothetical O-ATR systems consisting of either a zinc selenide or a germanium internal-reflection element, an iron or hematite overlayer, an adsorbate layer, and a solution of methylene chloride in water.
我们研究了覆盖层衰减全反射（O-ATR）红外光谱作为一种表面分析工具的可行性，用于研究暴露于非电解质水溶液的表面上吸附质的反应和分子性质。通过对O-ATR系统进行建模，假设它由具有均匀折射率的三个、四个或n个相组成，可以使用电场分析来确定吸附自由能、覆盖层厚度、初始入射角和内反射元件折射率等参数如何影响溶剂扣除后的O-ATR红外吸收光谱。解释了这种分析背后的理论，并给出了其应用结果，这些结果是针对由硒化锌或锗内反射元件、铁或赤铁矿覆盖层、吸附质层以及二氯甲烷在水中的溶液组成的假设O-ATR系统得出的。
