Spectro-Electrochemistry Publications
13-10-2017 07:34 (India)

For any redox reaction, electrochemical analysis by itself can only provide a basic idea about its kinetics along with the total number of ions/electrons transferred. It cannot identify the unknown species or radicals that may have formed as intermediates during the reaction. But if we combine the reaction-based electrochemistry with species-based spectroscopy we get a powerful hybrid technique that researchers have named as spectro-electrochemistry. Being a cost-effective and easy to operate method, in past two decades this technique has evolved as a powerful tool to yield mechanistic (chemistry), and energy-relevant (electro) information for a variety of processes studied in electrochemistry such as artificial photo-synthesis, electro-chromism, hydrogen generation, CO2 reduction and much more. In this newsletter, we will highlight the applications of various spectro-electrochemistry techniques in real-world.”

Electro-chromism Studies in Polyaniline (PANI) films for Cu(II) detection

“Hybrid Electrochemical/Electrochromic Cu(II) Ion Sensor Prototype Based on PANI/ITO-Electrode.” – Sensors and Actuators B Chemical 2017, 248, 527–535

Prof. Arunas Ramanavicius and his co-workers (State Research Institute Center for Physical Sciences and Technology, Lithuania) in collaboration with Dr. Babasaheb Ambedkar Marathwada University, India have synthesized conducting polymer polyaniline (PANI) based films to study the change in their inherent electro-chromic behavior in presence of Cu(II) ions. Such a sensor holds high potential in the field of electro-chromic based detection of Cu(II) in aqueous media. The spectro-electrochemistry measurements were conducted using PGSTAT 128N.

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PGSTAT 204 with AUT.SPECT.UA UV/VIS/NIR wavelength range (200 nm to 1100 nm)
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Electro-chemiluminescence technique for Hydrogen Peroxide Detection

“A Miniaturized Flow Injection Analysis System for Electrogenerated Chemiluminescence − Based Assays.” - M. M. P. S. Neves, M. B. González-García, D. Hernández-Santos, P. Fanjul-Bolado, ChemElectroChem 2017, 4, 1686 -- Metrohm DropSens, Spain

An ECL transduction chemistry mechanism based on a electrochemiluminescence resonance energy transfer (ECL-RET) donor−acceptor strategy, between an electro-oxidized luminophore (luminol) to a fluorophore (fluorescein), in the presence of the analyte of interest, was carried out. The results showed that fluorescein ECL-RET luminescent response increases the sensitivity of H2O2 detection by up to one order of magnitude, in comparison with a luminol−H2O2 fluorescein-free assay. All experiments were performed in a decentralized, small-sized, easy-to-use FIA system coupled to ECL detection instrumentation. Novel thin-layer flow−cell (TLFCL) screen-printed carbon electrodes integrated in one-channel flow cells were used as the electrode surface that allowed allowed a high degree of automation and simplicity of the assay.

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Electro-chemiluminescence device equipped with internal uStat -400

μStat ECL is a portable BiPotentiostat/Galvanostat combined with a specific ElectroChemiLuminescence (ECL) Cell that performs Electrochemiluminescence studies with DropSens Screen-Printed Electrodes (SPEs). Electrochemical and Chemiluminescence responses are perfectly synchronized and shown in real time. The equipment can also be used independently as a Bipotentiostat/Galvanostat.

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SPELEC RAMAN -- In-situ UV-Vis Studies Combined with Surface Enhanced Raman Spectroscopy (SERS) Methods

“Evaluation of electrochemical, UV/VIS and Raman spectro-electrochemical detection of Naratriptan with screen-printed electrodes.”-Talanta, Volume 178, 1 February 2018, Pages 85–88; Carla Navarro Hernández, Daniel Martín-Yerga, María Begoña González-García, David Hernández-Santos, Pablo Fanjul-Bolado -- Metrohm DropSens, Spain.

In this article, Naratriptan, an active pharmaceutical ingredient with antimigraine activity was electrochemically detected in low µM range and characterized in-situ using UV-Vis based Spectro-electrochemistry as well as time resolved Raman Spectro-electrochemistry. The oxidation product of Naratriptan is an indole based dimer with a yellowish color which allowed the construction of novel electrochemically treated silver screen-printed electrodes to be used as cost-effective SERS substrates for the analysis of Naratriptan.

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Real-time Synchronized Raman Spectro-electrochemistry

Combination of Raman and Bipotentiostat/Galvanostat in a fully integrated synchronized Raman Spectroelectrochemical instrument.

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