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Spectroelectrochemistry
SPECTROELECTROCHEMISTRY
Spectroelectrochemistry is a powerful technique that combines the advantages of spectroscopy and electrochemistry. Despite being a well developed technique, how much do I know about spectroelectrochemistry? Who were the researchers who developed this technique? Why can it be so powerful? If you are interested in knowing much more about this hybrid technique, its background, basics theoretics and historical facts, check our periodical articles on spectroelectrochemistry.
INFORMATION MEANS KNOWLEDGE
Spectroelectrochemistry Metrohm DropSens

Currently, there is a dense net of communication channels allowing us to get information from different media as well as new perspectives. It is said that the more information we have, the better. When we are well informed we are able to make wiser decisions. As researchers, we want to understand why things happen in a specific way and have a perfect knowledge about the materials, reactions and methodologies we study.

At the same time, we yearn to make the most of every trial.

How can we get much more information from our experiments?

Different points of view

When we get data from just one perspective, we have biased information. If you see the image below, you clearly see a bike.

Spectroelectrochemistry Metrohm DropSens
However, if you see the image from another perspective... the result is completely different.
Spectroelectrochemistry Metrohm DropSens

Are we wrong when we think it is a bike? Certainly not, we jump to a conclusion by taking into account half of the information.

Coupling techniques: spectroscopy and electrochemistry

Electrochemistry allows us to correlate the electrical current generated during an electrochemical reaction with the concentration of a substance. The processes taking part on the electrode are well described by different equations that provide us with a deep understanding of the electrochemical processes.

Spectroscopy studies the interactions between matter and electromagnetic radiation. Spectroscopic methods are based on measuring the radiation absorbed, emitted or scattered by molecular or atomic species of interest. Depending on the excitation wavelength the acquired spectra will provide us with information about the chemical structure, bonds, but also about molecule concentration.

Spectroelectrochemistry Metrohm DropSens

When we combine both techniques, while oxidation states are changed electrochemically at an electrode, spectral measurements on the solution adjacent to the electrode are made simultaneously. Undergoing reaction is characterized spectroscopically and allows to establish relationships between mechanisms and structures. The limited structural information available from the electrochemical response is complemented by optical monitoring.

Combining of both techniques is a good way of getting formal reduction potentials or electron stoichiometries of redox couples and biological redox complexes. Following a polymerization reaction, identifying polymer structure and stability, identification of reaction intermediates or defining product structures after electrochemical reaction are just a few examples of the potential of this hybrid technique.

If you are interested in Spectroelectrochemistry, do not hesitate to follow our articles on LinkedIn and on our website: www.metrohm-dropsens.com

Spectroelectrochemistry Metrohm DropSens
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