Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 24, Issue 2, Pages 615-623Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1cp04094d
Keywords
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Funding
- JSPS KAKENHI [18H05515, 20K15312]
- Kao Foundation for Arts and Sciences
- Mazda Foundation
- Kansai Research Foundation for Technology Promotion
- Yazaki Memorial Foundation for Science and Technology
- Grants-in-Aid for Scientific Research [20K15312] Funding Source: KAKEN
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This article discusses the importance of the interface between ionic liquids and solid substrates, as well as the methods of research using new technologies. It also explores the applications in interfacial analytical chemistry and compares them to other methods described in recent literature. Additionally, the supplementation of experimental data with theoretical calculations is addressed, providing a deeper understanding of interfacial reactions.
The solid-liquid interface forms an electric double layer that enables the function of electronic devices and, thus, represents an important area of electrochemical research. Because ionic liquids (ILs) are becoming prominent candidates for new high-performing electrolytes, their interface with solid substrates (e.g., metal electrodes or organic semiconductors) attracts substantial attention. An example of improvement achieved using ILs as electrolytes is a decrease in the operating voltage of transistors from >10 V in traditional SiO2-gated transistors to <1 V in IL-gated electronic double-layer organic field-effect devices. This perspective discusses the investigation of poorly accessible IL/substrate interfaces using both attenuated total reflectance ultraviolet (ATR-UV) spectroscopy and a newly developed electrochemical setup combined with ATR-UV (EC-ATR-UV), which allows analysis of the interfacial area under the application of varying electric potential. The recent EC-ATR-UV applications in interfacial analytical chemistry are overviewed and compared to other spectroscopic methods described in the recent literature. Lastly, the supplementation of experimental data with theoretical calculations (e.g., quantum chemical calculations and molecular dynamics simulations) is also addressed.
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