Using SERS To Understand the Binding of N-Heterocyclic Carbenes to Gold Surfaces,The Journal of Physical Chemistry Letters

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Using SERS To Understand the Binding of N-Heterocyclic Carbenes to Gold Surfaces
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2018-10-23 00:00:00 , DOI: 10.1021/acs.jpclett.8b02764
Michael J. Trujillo ₁ , Shelby L. Strausser ₂ , Jeffrey C. Becca ₃ , Joseph F. DeJesus ₂ , Lasse Jensen ₃ , David M. Jenkins ₂ , Jon P. Camden ₁

Affiliation

Surface functionalization is an essential component of most applications of noble-metal surfaces. Thiols and amines are traditionally employed to attach molecules to noble-metal surfaces, but they have limitations. A growing body of research, however, suggests that N-heterocyclic carbenes (NHCs) can be readily employed for surface functionalization with superior chemical stability compared with thiols. We demonstrate the power of surface-enhanced Raman scattering combined with theory to present a comprehensive picture of NHC binding to gold surfaces. In particular, we synthesize a library of NHC isotopologues and use surface-enhanced Raman scattering to record the vibrational spectra of these NHCs while bound to gold surfaces. Our experimental data are compared with first-principles theory, yielding numerous new insights into the binding of NHCs to gold surfaces. In addition to these insights, we expect our approach to be a general method for probing the local surface properties of NHC-functionalized surfaces for their expanding use in sensing applications.

中文翻译：

使用SERS理解N杂环卡宾与金表面的结合

表面功能化是大多数贵金属表面应用的重要组成部分。传统上使用硫醇和胺将分子连接到贵金属表面，但是它们有局限性。然而，越来越多的研究表明，与硫醇相比，N-杂环卡宾（NHC）可以容易地用于表面官能化，并具有优异的化学稳定性。我们展示了表面增强拉曼散射与理论相结合的能力，可提供NHC与金表面结合的全面图像。特别是，我们合成了NHC同位素分子库并使用表面增强拉曼散射来记录这些NHC结合到金表面时的振动光谱。我们的实验数据与第一性原理进行了比较，对NHC与金表面的结合产生了许多新见解。除了这些见解之外，我们希望我们的方法将成为探测NHC功能化表面的局部表面特性的通用方法，以扩展其在传感应用中的用途。

更新日期：2018-10-23

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