Bidimensional Spectroelectrochemistry: application of a new device in the study of a o-vanillin-copper(II) complex

Izquierdo, Daniel; Ferraresi-Curotto, Verónica; Heras, Aránzazu; Diez, Reinaldo Pis; González‐Baró, Ana C.; Colina, Álvaro

doi:10.1016/j.electacta.2017.05.105

Cited by 17 publications

(14 citation statements)

References 44 publications

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“…SEC joins the best of electrochemistry and spectroscopy together during an electron‐transfer process. As can be inferred, this multiresponse and “teamwork” technique has been used in a large number of fields, including, for example, electron transfer processes , chemical reaction mechanisms , side reactions , electrocatalysis , corrosion , conducting polymers , solar cells , memory devices , supercapacitors , synthesis and characterization of nanoparticles , carbon nanomaterials , characterization of metal complexes , liquid/liquid interfaces , electrochromic materials or study of compounds of biological interest , among others.…”

Section: Whatmentioning

confidence: 99%

“…In this way, information about electrochemical processes taking place on the electrode surface and in the diffusion layer are deconvolved because normal configuration provides information about the surface and the adjacent solution while, at the same time, parallel configuration provides information only about the diffusion layer solution. Therefore, bidimensional SEC yields a complete picture about the electrode process and helps to distinguish, without any controversy, if the electrode process is a simple electron‐transfer or if there are other processes taking place and accompanying this electron‐transfer, as could be for example, an adsorption of the reaction products on the electrode surface .…”

Section: Howmentioning

confidence: 99%

“…From this point of view, SEC is a really powerful analytical technique. SEC can be used with many different purposes, and excellent examples can be found in literature in different fields such as organic molecules , molecules of biological interest , inorganic complexes , conducting polymers , carbon nanotubes , graphene , fullerenes , metal nanoparticles , quantum dots , etc. A huge variety of information can be obtained using SEC, for example, formal potentials , electron transfer rate constants , diffusion coefficients , number of electrons , molar absorption coefficients , band‐gaps , among many others.…”

Section: Whymentioning

confidence: 99%

“…In fact, some manufacturers already provide software properly developed for this purpose. Simultaneous acquisition of data from different methods and different nature in a single experiment, which increases the selectivity and sensitivity . Sometimes it is possible to observe chemical reactions taking place at the interface which cannot be observed using the electrochemical signal . Moreover, the high amount of data obtained in a SEC experiment helps to resolve overlapped voltammograms and/or spectra of interfering compounds .…”

Section: Whymentioning

confidence: 99%

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Spectroelectrochemical Sensing: Current Trends and Challenges

et al. 2019

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Spectroelectrochemistry (SEC) has been used for more than 50 years, but this set of techniques has not been widely used for quantitative analysis. For many years, no commercial instruments were available, which made very difficult to spread the use of SEC. Nowadays, only the creativity of the researchers is required to exploit the capabilities of SEC. This review is written with the aim of showing the potential of SEC, mainly for analytical chemistry. Here, we explain what SEC is, how analytical responses can be obtained, why these techniques are useful for sensors, with a brief description of its advantages in use, and, finally, we try to show the challenges that must be addressed in the next years. SEC can resolve interesting analytical problems using the high amount of data provided by this intrinsic trilinear technique. Given the quantitative analysis point of view of this review, the discussion of the SEC techniques is focused on UV/Vis absorption, photoluminescence and Raman SEC.

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Section: Whatmentioning

confidence: 99%

Section: Howmentioning

confidence: 99%

Section: Whymentioning

confidence: 99%

Section: Whymentioning

confidence: 99%

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Spectroelectrochemical Sensing: Current Trends and Challenges

et al. 2019

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“…UV/Vis absorption SEC experiments have been carried out to study and to determine IP. Two different optical configurations can be used to perform this type of analysis, the so-called normal and parallel configurations [ 25 , 26 , 28 , 29 , 30 , 31 ]. The experiments carried out in normal configuration provide information related to the processes that take place on the surface of the electrode, such as adsorption processes, and in the solution adjacent to it, such as the oxidation or reduction of a soluble molecule.…”

Section: Introductionmentioning

confidence: 99%

Spectroelectrochemical Determination of Isoprenaline in a Pharmaceutical Sample

Olmo

Garoz‐Ruiz

Carazo

et al. 2020

Sensors

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UV/Vis absorption spectroelectrochemistry (SEC) is a multi-response technique that has been commonly used for the characterization of materials and the study of reaction mechanisms. However, it has been scarcely used for quantitative purposes. SEC allows us to obtain two analytical signals simultaneously, yielding a dual sensor in just one experiment. In the last years, our group has developed new devices useful for analysis. In this work, a SEC device in parallel configuration, based on optical fibers fixed on screen-printed electrodes, was used to determine isoprenaline in a commercial drug, using both, the electrochemical and the spectroscopic signals. In this commercial drug, isoprenaline is accompanied in solution by other compounds. Among them is sodium metabisulfite, an antioxidant that strongly interferes in the isoprenaline determination. A simple pretreatment of the drug sample by bubbling wet-air allows us to avoid the interference of metabisulfite. Here, we demonstrate again the capabilities of UV/Vis absorption SEC as double sensor for analysis and we propose a simple pretreatment to remove interfering compounds.

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