电化学（中英文）2025，Vol.31Issue(6)：1-18,18.DOI:10.61558/2993-074X.3528
金电极表面有序分子膜的电化学原位偏振调制红外反射光谱研究
PM IRRAS Studies of Organized Molecular Films at a Gold Electrode Surface
摘要
Abstract
This feature article illustrates the potential of polarization modulation infrared reflection absorption spectroscopy(PM IRRAS)to provide molecular-level information about the structure,orientation and conformation of constituents of thin films at electrode surfaces.PM IRRAS relies on the surface selection rules stating that the p-polarized IR beam is enhanced,while the s-polarized beam is attenuated at the metal surface.The difference between p-and s-polarized beams elimi-nates the background of the solvent and provides IR spectra at a single electrode potential.In contrast,two other popular in situ IR spectroscopic techniques,namely,subtractively normalized interfacial Fourier transform infrared spectroscopy(SNIFTIRS)and surface-enhanced infrared reflection absorption spectroscopy(SEIRAS),provide potential difference spec-tra to remove the signal from the bulk solution.In this feature article,we provide a brief tutorial on how to run the PM IRRAS experiment and describe the methods used for background elimination first.The application of the PM IRRAS in the biomimetic research is then illustrated by three examples:construction of a tethered bilayer,reconstitution of colicin into a phospholipid bilayer and determination of the orientation of nucleolipids in a monolayer assembled at a gold electrode surface.Finally,the structural changes of graphene oxide during its electrochemical reduction are described to highlight the promising application of PM IRRAS in materials science.关键词
偏振调制红外反射吸收光谱/仿生生物膜/氧化石墨烯电化学还原Key words
Polarization modulation infrared reflection absorption spectroscopy/Biomimetic membranes/Graphene oxide reduction引用本文复制引用
苏章菲,陈爱成,Jacek Lipkowski..金电极表面有序分子膜的电化学原位偏振调制红外反射光谱研究[J].电化学（中英文）,2025,31(6):1-18,18.基金项目
This research was funded by Discovery Grants from the Natural Sciences and Engineering Research Council of Canada(JL:RGPIN-2022-03958 （）
AC:RGPIN-2022-04238).A.Chen acknowledges NSERC and the Canada Foundation for Innovation(CFI)for the Canada Research Chair Award in Electrochem-istry and Nanoscience.JL expresses his gratitude to Professor Ian Burgess for discussion of recent devel-opments in SEIRAS. （CFI）
