In Situ Examination of Adsorption by Reflectance Spectroscopy

界面现象是许多技术、医学和科学应用的核心。如果不知道吸附物种的性质和覆盖范围，表面活性物种是否是故意添加或发现的污染物，任何涉及表面的系统都不能完全理解。为了使吸附的基础研究对实际应用产生影响(如战略金属回收)，需要新的定量方法和新的定性见解。光谱学可以同时提供定量和定性的测定，即物种形成。利用红外(IR)和紫外-可见(UV-Vis)特征全反射光谱(ATR)研究氧化物在固液界面上的吸附过程，可以提供分子水平的信息。将特别强调在这种界面上存在的物种和条件的鉴定。计划研究a)由于过量浓度、空间位阻约束和各向异性极性，吸附物种在界面区域的反应性如何不同；以及b)构象、互变异构化、齐聚或电离平衡的变化如何影响动力学。

Interfacial phenomena lie at the heart of many technical, medical and scientific applications. Any system involving surfaces is not completely understood with out knowing the nature of adsorbing species and the extent of coverage, whether the surface active species were purposely added or found as contaminants. For fundamental studies in adsorption to have an impact on practical applications (such as strategic metals recovery), new quantitative methods and new qualitative insights are required. Spectroscopy can simultaneously provide quantitative and qualitative determinations, i.e., speciation. the adsorption processes on oxide at solid-liquid interfaces will be studied by Infrared (IR) and UV-Visible (UV-Vis) Attenerated total Reflection (ATR) spectroscopy which can provide molecular-level information. Particular emphasis will be placed on identification of the species and conditions present at such interfaces. It is planned to examine a) how the reactivity of adsorbed species may be different in the interfacial region, due to excess concentration, steric constraints, and anisotropic polarity; and b) how changes in conformation, tautomerization, oligomerization, or ionization equilibria will affect kinetics.