A spectroelectrochemical cell for ultrafast two-dimensional infrared spectroscopy

The Review of Scientific Instruments
Youssef El KhouryJens Bredenbeck

Abstract

A spectroelectrochemical cell has been designed to combine electrochemistry and ultrafast two-dimensional infrared (2D-IR) spectroscopy, which is a powerful tool to extract structure and dynamics information on the femtosecond to picosecond time scale. Our design is based on a gold mirror with the dual role of performing electrochemistry and reflecting IR light. To provide the high optical surface quality required for laser spectroscopy, the gold surface is made by electron beam evaporation on a glass substrate. Electrochemical cycling facilitates in situ collection of ultrafast dynamics of redox-active molecules by means of 2D-IR. The IR beams are operated in reflection mode so that they travel twice through the sample, i.e., the signal size is doubled. This methodology is optimal for small sample volumes and successfully tested with the ferricyanide/ferrocyanide redox system of which the corresponding electrochemically induced 2D-IR difference spectrum is reported.

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Citations

Oct 27, 2017·Topics in Current Chemistry·Jan Philip Kraack
Aug 2, 2019·Chemical Science·Christopher SandfordShelley D Minteer
Feb 20, 2021·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Julia HeitmüllerTobias Brixner
Apr 10, 2021·The Journal of Physical Chemistry Letters·Laura M KieferKevin J Kubarych
Aug 24, 2017·Chemical Reviews·Jan Philip Kraack, Peter Hamm
Dec 7, 2021·The Journal of Physical Chemistry Letters·Nicholas H C Lewis, Andrei Tokmakoff

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