Video Experimental Relacionado
Updated: Jul 15, 2025
10:57
Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
18.3K
Superar la compatibilidad del grupo funcional con ventana limitada potencial mediante la electrólisis de corriente
Sachini Rodrigo1, Atanu Hazra1, Jyoti P Mahajan1
1Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States.
Journal of the American Chemical Society
|September 25, 2023
Resumen
La electrólisis de corriente alterna (CA) expande la compatibilidad del grupo funcional en la electrosíntesis superando las limitaciones potenciales. Este método permite la adición secuencial de grupos funcionales, tolerando incluso porciones redox-lábiles para obtener mejores rendimientos sintéticos.
Área de la Ciencia:
- La electroquímica
- Síntesis orgánica
Sus antecedentes:
- Los métodos electrosintéticos a menudo están limitados por su ventana de reacción potencial, lo que restringe la compatibilidad del grupo funcional.
- Los grupos funcionales redox-lábiles pueden ser incompatibles con la electrosíntesis tradicional debido a las limitaciones potenciales de la ventana.
Objetivo del estudio:
- Demostrar que la electrólisis de corriente alterna (CA) puede superar la posible compatibilidad de grupos funcionales con ventanas limitadas.
- Explorar el uso de la electrólisis de CA para la heterodifuncionalización de alceno, tolerando grupos funcionales redox-lábiles.
Principales métodos:
- Se utiliza la electrólisis de corriente alterna (CA) para la heterodifuncionalización de alquenos.
- Se han diseñado y demostrado reacciones impulsadas por CA para la cloro- y bromotrifluorometilación secuencial y la clorosulfonilación.
- Se utiliza la voltametría cíclica para estudiar el mecanismo de reacción y las limitaciones del rendimiento del producto.
Principales resultados:
- La electrólisis de CA permitió con éxito la funcionalización secuencial de alquenos, tolerando grupos redox-lábiles como el pirrolo, la quinona y el tioéter de arilo.
- El entorno redox oscilante en la electrólisis de CA permite la regeneración de los intermedios redox activos.
- Se encontró que el rendimiento del producto estaba limitado por el grado de regeneración del material de partida durante el ciclo redox.
Conclusiones:
- La electrólisis de CA ofrece un nuevo enfoque para mejorar la compatibilidad de los grupos funcionales en la electrosíntesis.
- Los hallazgos sugieren que la electrólisis de CA puede usarse para sintetizar moléculas complejas con grupos funcionales previamente incompatibles.
- El rendimiento del producto en la electrólisis de CA puede predecirse potencialmente a partir de datos de voltametría cíclica.
Videos de Conceptos Relacionados
01:27Controlled-Current Coulometry: Overview
233
Controlled current coulometry, also known as amperostatic coulometry, is a technique used in electrochemical analysis to measure the quantity of a substance through the controlled passage of current. It involves the application of a constant current to an electrochemical cell containing the analyte of interest. As the current flows through the cell, the analyte undergoes a redox reaction at the electrode surface, resulting in a charge transfer. By monitoring the time required for a certain...
233
01:17Controlled-Potential Coulometry: Electrolytic Methods
197
Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...
The chosen potential...
197
03:00Electrolysis
26.6K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
26.6K
01:06Interfacial Electrochemical Methods: Overview
280
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
280
02:47Voltaic/Galvanic Cells
57.5K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
57.5K
01:17Ion Exchange
617
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
617