Surface–Bulk Vibrational Correlation Spectroscopy

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• 作者：Sandra Roy ; Paul A. Covert ; Tasha A. Jarisz ; Chantelle Chan ; Dennis K. Hore
• 刊名：Analytical Chemistry
• 出版年：2016
• 出版时间：May 3, 2016
• 年：2016
• 卷：88
• 期：9
• 页码：4682-4691
• 全文大小：847K
• 年卷期：0
• ISSN：1520-6882

文摘

Homo- and heterospectral correlation analysis are powerful methods for investigating the effects of external influences on the spectra acquired using distinct and complementary techniques. Nonlinear vibrational spectroscopy is a selective and sensitive probe of surface structure changes, as bulk molecules are excluded on the basis of symmetry. However, as a result of this exquisite specificity, it is blind to changes that may be occurring in the solution. We demonstrate that correlation analysis between surface-specific techniques and bulk probes such as infrared absorption or Raman scattering may be used to reveal additional details of the adsorption process. Using the adsorption of water and ethanol binary mixtures as an example, we illustrate that this provides support for a competitive binding model and adds new insight into a dimer-to-bilayer transition proposed from previous experiments and simulations.