Chemical selectivity in electrochemical surface oxidation enhanced Raman scattering

Perez-Estebanez, Martín; Hernandez, Sheila; Perales-Rondón, Juan V.; Gómez, Elvira; Heras, Aránzazu; Colina, Álvaro

doi:10.1016/j.electacta.2020.136560

Cited by 12 publications

(8 citation statements)

References 42 publications

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“…However, the Raman signal can be significantly enhanced using appropriate substrates. Two different strategies are usually employed to enhance the Raman signal during an electrochemical experiment: EC-SERS [13,14,21] and EC-SOERS [12,19,20,40]. In the case of folic acid, EC-SERS provides the best response.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical generation of surface enhanced Raman scattering substrates for the determination of folic acid

Cheuquepán

Hernandez

Perez-Estebanez

et al. 2021

Journal of Electroanalytical Chemistry

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Section: Resultsmentioning

confidence: 99%

Electrochemical generation of surface enhanced Raman scattering substrates for the determination of folic acid

Cheuquepán

Hernandez

Perez-Estebanez

et al. 2021

Journal of Electroanalytical Chemistry

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“…During the investigation of uric acid, the authors observed a signal enhancement during the application of oxidative potentials to a silver electrode. Their research group has since explored the SOERS phenomenon in a variety of ways toward the characterization of this novel technique, including the effect of chloride and pH of the electrolyte (Perales‐Rondon et al, 2019), calculation of the enhancement factors (Hernandez et al, 2021), chemical selectivity with anions (Perez‐Estebanez et al, 2020), and the combination of EC‐SERS and SOERS in a single experiment (Hernandez, Perales‐Rondon, Heras, & Colina, 2020). SOERS is expected to be observed in molecules containing carboxylic acids or aromatic rings that contain a carbonyl (Hernandez et al, 2021).…”

Section: Overview Of Sers Theorymentioning

confidence: 99%

“…SOERS is expected to be observed in molecules containing carboxylic acids or aromatic rings that contain a carbonyl (Hernandez et al, 2021). Other analytes that have been explored using SOERS include nicotinic acid, nicotinamide, uracil, and 5‐fluorouracil, and others (Hernandez et al, 2019; Perez‐Estebanez et al, 2020, 2021).…”

Section: Overview Of Sers Theorymentioning

confidence: 99%

Transitioning surface‐enhanced Raman spectroscopy (SERS) into the forensic drug chemistry and toxicology laboratory: Current and future perspectives

Ott

Arroyo

2023

WIREs Forensic Science

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Applications and advances in surface-enhanced Raman spectroscopy (SERS) have grown over the last several years, demonstrating improvements in sensitivity and selectivity. Applications for SERS-related techniques have been explored in many analytical disciplines including forensic applications. Drug chemistry and toxicology may benefit from the growth of SERS since many methods have demonstrated high sensitivity, potential for quantitative analysis, and portable instrumentation for onsite testing. SERS techniques have been developed using many substrates including nanoparticles and colloids; microfluidic devices; paper-based substrates; electrodes; and wearable/flexible devices. These methods take advantage of the SERS phenomenon, providing more potential applications for Raman analysis and overcoming the traditional challenges of the technique. This is desirable for forensic drug chemistry applications which require screening and confirmatory approaches and analysis of mixtures with low weight percent contributions of analytes, as well as forensic toxicology, where matrix interferences, sensitivity requirements, and a growing introduction of novel drug entities pose challenges. Several chemometric approaches have been applied to Raman data to improve identification, classification, and quantification. These advances position SERS for incorporation into forensic chemistry laboratories. While some SERS applications are available commercially, widespread use of SERS in practicing forensic laboratories remains limited. Due to the requirements for use of analytical techniques in the courtroom, future studies for SERS should revolve around the assessment of validation parameters common in other analytical methods. SERS techniques that are rapid, simple, and inexpensive may be more quickly adapted for forensic testing, where use as advanced screening techniques is a clear avenue of research.

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“…Obwohl der in diesem Artikel beschriebene Ramaneffekt, besonders in der Kombination mit der Elektrochemie, schwierig theoretisch zu erklären ist, soll jedoch im Rahmen der Konzeption der innovativen experimentellen Chemiedidaktik der Versuch unternommen werden, das Prinzip des sog. elektrochemisch aktivierten oberflächenverstärkten Ramaneffekts (EC-SERS) [11] an einem einfachen Beispiel darzustellen. Der SERS-Effekt ist schon seit 1974 bekannt [12], derzeit wird er aber als eine sehr wichtige analytische Methode wiederentdeckt.…”

Section: Introductionunclassified

University experiments on the absorption spectroelectrochemistry and the surface‐enhanced Raman effect of methylviogen on a gold electrode

Habekost

2022

Chemkon

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Redoxreaktionen auf Goldsiebdruckelektroden (SPE) können elektrochemisch mit zyklischer Voltammetrie (Cyclovoltammetrie, CV) und spektroskopisch mit der optischen und der Ramanspektroskopie gemessen werden. Die Kombination aus CV und optischer oder Raman Spektroskopie, die sog. Absorpto‐ oder Ramanvoltammetrie, bietet neben elektrochemischen Informationen über Redoxreaktionen an Elektroden auch Informationen über die Änderung der optischen und Schwingungseigenschaften der beteiligten Stoffe. Der didaktische Hintergrund der Arbeit ist die Hypothese, dass die Kombination der beiden unterschiedlichen Gebiete der physikalischen Chemie dazu beitragen kann, Elektrodenreaktionen besser zu verstehen. Die Ramanspektroskopie ist eine leistungsfähige Technik zum Nachweis von sehr geringen Konzentrationen des Analyten auf Elektroden (im Bereich von Picomol), wenn diese durch elektrochemische Maßnahmen oder durch Verwendung von entsprechenden Nanoteilchen modifiziert werden. Eine einfache elektrochemische in‐situ Modifikation führt zum oberflächenverstärkten Ramaneffekt (EC‐SERS). Damit können chemische Reaktionen anhand der Änderung von Schwingungszuständen charakterisiert werden, ohne die manchmal langwierige Herstellung von Metall‐Nanopartikeln als Substrat für SERS.

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Chemical selectivity in electrochemical surface oxidation enhanced Raman scattering

Cited by 12 publications

References 42 publications

Electrochemical generation of surface enhanced Raman scattering substrates for the determination of folic acid

Electrochemical generation of surface enhanced Raman scattering substrates for the determination of folic acid

Transitioning surface‐enhanced Raman spectroscopy (SERS) into the forensic drug chemistry and toxicology laboratory: Current and future perspectives

University experiments on the absorption spectroelectrochemistry and the surface‐enhanced Raman effect of methylviogen on a gold electrode

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