Journal of the Mexican Chemical Society最新文献

{"title":"The Long and Winding Road to Build a Credible Mexican Electrochemistry","authors":"Ignacio González-Martínez","doi":"10.29356/jmcs.v67i4.2085","DOIUrl":"https://doi.org/10.29356/jmcs.v67i4.2085","url":null,"abstract":"Abstract. The recognition as emeritus researcher granted by the Mexican Council of Science and Technology a year ago (2020) appeared as a reminder of the beginning of my career of the challenges, friendships and experiences lived at the extrema during these years up to now. Though I am grateful for the opportunity granted by the Journal of the Mexican Chemical Society to write this article, summarizing all the experiences and teachings in a single perspective article would be a titanic task. Nevertheless, I am committed to highlighting some key moments from my journey so far. It is my hope that this manuscript will inspire and motivate the next generation of electrochemistry researchers and commemorate the unforgettable experiences shared with my students, colleagues, and friends. Resumen. El reconocimiento como investigador nacional emérito que me fue otorgado por el Consejo Nacional de Ciencia y Tecnología hace un año (2022) ha detonado el reencuentro con las experiencias vividas al inicio de mi carrera que comprenden retos, amistades y múltiples experiencias, vividas con gran intensidad desde esos días (1984) hasta el día de hoy. Agradezco la oportunidad que me ha concedido la Sociedad Química de México de escribir este artículo, resumir todas las experiencias vividas y aprendizajes adquiridos en este artículo de perspectiva ha sido una labor titánica. De esta manera se describen los momentos claves que fueron apareciendo en mi carrera científica y que forjaron mis conocimientos y habilidades. Deseo que este escrito inspire y motive a la siguiente generación de investigadores electroquímicos y que así mismo, sea un reconocimiento a las experiencias inolvidables compartidas con mis estudiantes, colegas y amigos.","PeriodicalId":17377,"journal":{"name":"Journal of the Mexican Chemical Society","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135949532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chemical Characterization and Antioxidant Evaluation of Young and Aged Wines from Aguascalientes and Queretaro","authors":"Raquel Castañeda, Luis A. Godínez, Janet Ledesma-García, Pedro Vázquez-Landaverde, Guadalupe Loarca Piña, Sandra Mendoza","doi":"10.29356/jmcs.v67i4.2001","DOIUrl":"https://doi.org/10.29356/jmcs.v67i4.2001","url":null,"abstract":"Abstract. Red wine is distinguished by a high economic and cultural value and therefore, its reliable characterization is important to assess its quality and authentication. Currently, Mexican wine consumption is growing due to wine tourism initiatives, then the determination of the chemical profile of commercial selected samples of young and aged red wines produced at wineries from Queretaro and Aguascalientes was performed. Seventy-eight nonvolatile compounds were identified by ultra performance liquid chromatography coupled to mass spectrometry. Three main families of secondary metabolites (Flavonols, ellagitannins and anthocyanins) were quantified by differential pulse voltammetry using carbon screen printed electrodes (SPEs). Tempranillo aged wine from Vinos del Marqués, Queretaro, showed the highest content of total polyphenols and anthocyanins from the evaluated wine samples. This research contributes to the knowledge of the chemical profile of commercial selected samples from wineries that belong to Mexican wine routes in a consolidated and experimental stage. Resumen. El vino tinto se distingue por un alto valor económico y cultural y, por lo tanto, su caracterización confiable es importante para evaluar su calidad y autenticación. Actualmente, el consumo de vinos mexicanos se encuentra en crecimiento debido a las iniciativas de enoturismo, por ello, se llevó a cabo la determinación del perfil químico de muestras comerciales seleccionadas de vinos tintos jóvenes y de conserva producidos en bodegas de Querétaro y Aguascalientes. Se identificaron setenta y ocho compuestos no volátiles mediante cromatografía líquida de alta resolución acoplada a espectrometría de masas. Tres familias principales de metabolitos secundarios (flavonoles, elagitaninos y antocianinas) fueron cuantificadas mediante voltamperometría de pulso diferencial utilizando electrodos serigrafiados (SPEs) de carbón. El vino Tempranillo conserva de Vinos del Marqués, Querétaro, mostró el mayor contenido de polifenoles totales y antocianinas de las muestras de vino evaluadas. Esta investigación contribuye al conocimiento del perfil químico de muestras comerciales seleccionadas de bodegas pertenecientes a las rutas del vino mexicano en etapa consolidada y experimental.","PeriodicalId":17377,"journal":{"name":"Journal of the Mexican Chemical Society","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135949537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Leaf Liquid Extract of Citrus X-Latifolia for Corrosion Inhibition of Structural Steel AISI 1045 in Acidic Environment","authors":"Juan Carlos Trinidad González, Héctor Herrera Hernández, Araceli Mandujano Ruiz, José Guadalupe Miranda Hernández","doi":"10.29356/jmcs.v67i4.2029","DOIUrl":"https://doi.org/10.29356/jmcs.v67i4.2029","url":null,"abstract":"Abstract. In the present research work, the corrosion inhibition capacity of a liquid extract based on Citrus X-Latifolia leaves was evaluated as a green inhibitor that complies with a natural, economical, and environmentally friendly option. The tests were carried out on a carbon steel AISI 1045 exposed to an acid corrosive medium of 10 mL H2SO4 (0.5 M) to which various concentrations of the extract were dosed as follows: 40, 80, 120, 160, 200, 240, 280, 320, 360 and 400 ppm under standard conditions. Characterization by FT-IR was carried out to detect functional groups of the extract. The inhibitory behavior was recorded by electrochemical techniques (Tafel polarization and EIS). Finally, optical microscopy was used to evaluate the corrosion morphology. The results reveal that the adsorption of the extract molecules on steel follows the behavior of a Langmuir isotherm, reaching a maximum efficiency of 89 % with a concentration of 400 ppm. Finally, an evident change in the surface morphology of the steel sample is observed, thus reducing the pitting corrosion attack on AISI 1045 steel. Resumen. En el presente trabajo de investigación se evaluó la capacidad de inhibición de la corrosión de un extracto líquido a base de hojas de Citrus X-Latifolia como inhibidor verde que cumpla como una opción natural, económica y amigable con el medio ambiente. Los ensayos se realizaron sobre un acero al carbono AISI 1045 expuesto a un medio ácido corrosivo de 10 mL de H2SO4 (0,5 M) al que se dosificaron diversas concentraciones del extracto: 40, 80, 120, 160, 200, 240, 280, 320, 360 y 400 ppm en condiciones estándar. Se realizó una caracterización por FT-IR para detectar los grupos funcionales del extracto. El comportamiento inhibitorio se registró mediante técnicas electroquímicas (polarización de de Tafel y EIS). Finalmente, se utilizó microscopía óptica para evaluar la morfología de la corrosión. Los resultados revelan que la adsorción de las moléculas del extracto sobre el acero sigue el comportamiento de una isoterma de Langmuir, alcanzando una eficiencia máxima del 89 % con una concentración de 400 ppm. Finalmente, se observa un cambio evidente en la morfología superficial de la muestra de acero, reduciéndose así el ataque de corrosión por picaduras en el acero al carbono 1045.","PeriodicalId":17377,"journal":{"name":"Journal of the Mexican Chemical Society","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135949245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Weather Conditions, Corrosivity Indexes and Electrochemical Corrosion of Carbon Steel, Copper and Zinc in the Coastal Atmosphere of Tuxpan, Veracruz, Mexico","authors":"E. Gallardo-Castán, G. Lugo-Islas, N. García-Navarro, J. G. Ibañez Cornejo, G. Galicia Aguilar, J. L. Ramírez Reyes","doi":"10.29356/jmcs.v67i4.2041","DOIUrl":"https://doi.org/10.29356/jmcs.v67i4.2041","url":null,"abstract":"Abstract. Tuxpan is a port with economic and industrial important activity subject to atmospheric corrosion of metal structures such as boats, ships, oil platforms, and power stations. The main purpose of this paper is to evaluate the atmospheric corrosion of Tuxpan Veracruz, it was necessary to install an exposition panel with carbon steel specimens, galvanized steel (zinc), and copper to evaluate them in every season by electrochemical methods (electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR) and potentiodynamic polarization curves (CP). In addition, corrosivity indexes of atmospheric are evaluated by CLIMAT and ISO methodology. An exposition panel was installed with specimens of aluminum wire on steel screws, copper screws, and nylon screws to study corrosivity indexes through mass loss in every season of the year and thus classify the different types of atmospheres; marine, industrial, and rural-urban according to the values specified in the standard (ISO 8408, 9223, 9224). The corrosivity indexes are under the standards allowed in the regulations. However, they show the aggressiveness of the marine and industrial atmosphere due to the location and activities of the port in the northern zone. Zinc and carbon steel corrodes due to aggressive agents such as chlorides and sulfur dioxide, forming soluble oxides on the surface of the metallic substrate, while copper forms corrosion products that weakly protect its surface. Resumen. Tuxpan es un puerto con importante actividad económica e industrial, ha sido objeto del proceso de corrosión atmosférica en las estructuras metálicas como embarcaciones, botes, plataformas petroleras y Termoeléctricas. El propósito principal de este trabajo es evaluar la corrosión atmosférica de Tuxpan Veracruz, se instaló un panel de exposición con probetas de acero al carbono, acero galvanizado (zinc) y cobre para poder evaluarlas en cada estación del año por métodos electroquímicos (impedancia electroquímica espectroscopia (EIE), resistencia de polarización lineal (Rp) y curvas de polarización potenciodinámicas (CP). Además, se evalúan los índices de corrosividad de la atmósfera mediante la metodología CLIMAT e ISO. Se instaló un panel de exposición con probetas de alambre de aluminio sobre tornillos de acero, tornillos de cobre y tornillos de plástico para estudiar los índices de corrosividad por pérdida de masa en cada estación del año, y así clasificar los diferentes tipos de atmósferas: marina, industrial y rural-urbana según los valores especificados en la norma (ISO 8408, 9223, 9224). Los índices se encuentran por debajo de los estándares permitidos en la normatividad. Sin embargo, muestran la agresividad del ambiente marino e industrial producto de la ubicación y actividades del puerto en la zona norte. El zinc y el acero al carbono se corroen debido a agentes agresivos como los cloruros y el dióxido de azufre, formando óxidos solubles en la superficie del sustrato metálico, m","PeriodicalId":17377,"journal":{"name":"Journal of the Mexican Chemical Society","volume":"157 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135949538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Perspective Article","authors":"Jorge G. Ibañez-Cornejo","doi":"10.29356/jmcs.v67i4.1954","DOIUrl":"https://doi.org/10.29356/jmcs.v67i4.1954","url":null,"abstract":"Abstract. A bird´s eye view of some qualitative aspects of the state of Electrochemistry in Mexico in the 80´s and that of now is given. My initial steps in the field were very encouraging and I have continued in it for 4 decades, of which an overview is given with emphasis in Environmental Electrochemistry and Electrochemistry and Corrosion Education. Resumen. Se da una vista panorámica de algunos aspectos cualitativos del estado de la Electroquímica en México en los años 80 y el de ahora. Mis primeros pasos en el campo fueron muy alentadores y he continuado en él durante 4 décadas, de las cuales doy una visión general con énfasis en Electroquímica Ambiental y en Educación en Electroquímica y Corrosión.","PeriodicalId":17377,"journal":{"name":"Journal of the Mexican Chemical Society","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135949533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Green Hydrogen, PEM Fuel Cells, and Li-ion Batteries in a Vehicular-Transport Prototype","authors":"Omar Solorza-Feria","doi":"10.29356/jmcs.v67i4.1986","DOIUrl":"https://doi.org/10.29356/jmcs.v67i4.1986","url":null,"abstract":"Abstract. In this communication, recent advances reported in the literature for the development of water splitting in anionic alkaline and polymeric electrolyzers are provided, with particular focus on the feasibility of application of the green hydrogen obtained from renewables as energy carrier to decarbonize the industry and the transportation sector. Despite green hydrogen technology has been proven to be economically viable, financially attractive, and socially beneficial, result of paramount important to reduce costs and accelerate development of the hydrogen and fuel cells energy technologies for a continuous innovation. The application of the green hydrogen and oxygen from air to Cinvestav hybrid vehicular transport prototype, designed, manufactured, and tested in my electrochemical group of research are presented. Resumen. En esta comunicación, se proporcionan los avances recientes reportados en la literatura para el desarrollo de la electrolisis del agua en electrolizadores poliméricos y alcalinos, con especial atención a la viabilidad de la aplicación del hidrógeno verde, obtenido de las energías renovables como vector de energía para descarbonizar la industria y el sector transporte. A pesar de que se ha demostrado que la tecnología del hidrógeno verde es económicamente viable, financieramente atractivo y socialmente beneficioso, resulta de suma importancia reducir costos y acelerar el desarrollo de las tecnologías energéticas de hidrógeno y celdas de combustible para una innovación continua. Se presenta la aplicación del hidrógeno verde y oxígeno del aire al prototipo de transporte vehicular híbrido Cinvestav, diseñado, fabricado y probado en mi grupo de investigación en electroquímica.","PeriodicalId":17377,"journal":{"name":"Journal of the Mexican Chemical Society","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135949534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Trip to Mexico that Lasts More than 40 years. A Life Beyond Rust","authors":"Juan (Joan) Genesca-LLongueras","doi":"10.29356/jmcs.v67i4.1957","DOIUrl":"https://doi.org/10.29356/jmcs.v67i4.1957","url":null,"abstract":"Abstract. The life and work of Juan Genesca-LLongueras, a corrosion expert Professor who has spent over 40 years in Mexico, and his biography, academic training, research interests, and contributions to corrosion science are presented. The chronicle covers his early experiences in corrosion and electrochemistry, how he has contributed to teaching corrosion at UNAM and promoting a sustainable society, and how he has been committed to promoting sustainable development through corrosion prevention and control research throughout his career. His research interests include galvanic corrosion in the automotive sector, atmospheric corrosion, cathodic protection, flow accelerated corrosion (FAC), and CO2/H2S corrosion. He has been highly active in scientific societies and received numerous awards for his corrosion science and engineering contributions. He was named Emeritus Investigator by the Mexican Conacyt National Research System (Sistema Nacional de Investigadores) in March 2022. Resumen. Se presenta la vida y obra de Juan Genesca-LLongueras, profesor experto en corrosión con más de 40 años en México, así como su biografía, formación académica, intereses de investigación y contribuciones a la ciencia de la corrosión. La crónica recorre sus primeras experiencias en corrosión y electroquímica, cómo ha contribuido a la enseñanza de la corrosión en la UNAM y a promover una sociedad sustentable, y cómo se ha comprometido a promover el desarrollo sustentable a través de la investigación en prevención y control de la corrosión a lo largo de su carrera. Sus intereses de investigación incluyen la corrosión galvánica en el sector automotriz, la corrosión atmosférica, la protección catódica, la corrosión acelerada por flujo (FAC) y la corrosión por CO2/H2S. Ha sido muy activo en sociedades científicas y recibió numerosos premios por sus contribuciones a la ingeniería y la ciencia de la corrosión. Fue nombrado Investigador Emérito por el Sistema Nacional de Investigadores del Conacyt de México en marzo de 2022. 1. Brief biography and academic training2. The first years in corrosion and Mexico3. A first look at electrochemistry in Mexico in the 80s of the last century4. Teaching Corrosion at UNAM5. Some pending corrosion duties towards a sustainable society6. Acknowledgments7. References","PeriodicalId":17377,"journal":{"name":"Journal of the Mexican Chemical Society","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135949540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Challenge","authors":"R. Daniel Little","doi":"10.29356/jmcs.v67i4.2077","DOIUrl":"https://doi.org/10.29356/jmcs.v67i4.2077","url":null,"abstract":"The present contribution overviews several aspects of my groups’ involvement in the field of mediated electron transfer. From the laboratories of its pioneers to the present day, the field maintains a position of interest and fundamental importance, and is now widely accepted and utilized. I begin with a brief review of the basics where we will:
 
 differentiate mediated and direct electrolysis;
 highlight similarities between it and sensitized photolyses;
 explore the steps/stages associated with a mediated process focusing particularly upon the kinetics and thermodynamics of the electron transfer step;
 describe how to overcome the thermodynamic impasse that frequently accompanies electron transfer.
","PeriodicalId":17377,"journal":{"name":"Journal of the Mexican Chemical Society","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135949536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"History and Perspectives from My Contribution to the Development of Electrochemistry in Mexico","authors":"Yunny Meas","doi":"10.29356/jmcs.v67i4.2000","DOIUrl":"https://doi.org/10.29356/jmcs.v67i4.2000","url":null,"abstract":"Abstract. Dr. Yunny Meas tells us about his participation in the development of electrochemistry in Mexico, from his beginnings as a guest researcher at CINVESTAV in 1978, through a short period at UNAM and a prolonged period at UAM-Iztapalapa, to the current creation and maturation of CIDETEQ. He relates his professional experiences with each stage's political and economic conditions, which taught him how to focus his R&D lines to help the sustainable growth of the region and the country. Resumen. El Dr. Yunny Meas nos relata su participación en el desarrollo de la electroquímica en México, desde sus inicios como investigador invitado en el CINVESTAV en 1978, pasando un periodo corto en la UNAM y un periodo más largo en la UAM- Iztapalapa, hasta la creación y maduración actual del CIDETEQ. Relaciona las experiencias profesionales con las condiciones políticas y económicas de cada etapa, que le sirvieron de lecciones para aprender a enfocar sus líneas de I &D para ayudar al crecimiento sostenible de la región y del país.","PeriodicalId":17377,"journal":{"name":"Journal of the Mexican Chemical Society","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135949539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Practical and Instructive Approach to Purify Acetonitrile for a Wide Electrochemical Window","authors":"Mario Ávila-Gutierrez, Salvador Gutierrez-Portocarrero, Luis Corono-Elizarrarás, Mario A. Alpuche Aviles","doi":"10.29356/jmcs.v67i4.2013","DOIUrl":"https://doi.org/10.29356/jmcs.v67i4.2013","url":null,"abstract":"Abstract. Because of its large electrochemical window, acetonitrile (MeCN) is one of the most widely used solvents in electrochemistry. It is a suitable solvent for nonaqueous electrolytes that allows studies of cathodic and anodic processes, but electrolyte purification remains challenging. As received, the high-performance liquid chromatography (HPLC) grade is unsuitable for most electroanalytical applications. We present an approach to optimize the purification of HPLC-grade acetonitrile to yield a tetrabutylammonium perchlorate (TBAP)/MeCN electrolyte for experiments in nonaqueous media. We used cyclic voltammetry (CV) to show the background due to impurities and to guide the experimental design to a background current acceptable for CVs of a 1 mM typical concentration of a redox-active molecule. We use 3A molecular sieves, followed by distillation over CaH2 with a final treatment with Al2O3. The optimized procedure yields CH3CN with small background currents, increasing the signal-to-noise ratio and minimizing chemical complications over a wide potential window. Our approach includes discriminating between impurities in the solvent and electrolyte salts; for TBAP, we recrystallize from ethyl acetate and 95 % ethanol. The process and theoretical guidelines apply to other nonaqueous electrolytes dealing with electroactive impurities, including organic molecules, oxygen, and water. Resumen. El acetonitrilo (MeCN) es uno de los disolventes más utilizados en electroquímica por su amplia ventana electroquímica. Es un disolvente adecuado para electrolitos no acuosos que permite estudiar procesos electroquímicos catódicos y anódicos. Sin embargo, para llevar a cabo estos estudios, es importante considerar la purificación del electrolito que sigue siendo un reto. Tal como se recibe, el acetonitrilo para cromatografía de alto rendimiento (HPLC, por las siglas en inglés) es inadecuado para la mayoría de las aplicaciones electroanalíticas. En este trabajo presentamos un método para optimizar la purificación del acetonitrilo grado HPLC y obtener un electrolito de perclorato de tetrabutilamonio, (TBAP)/MeCN. Utilizamos voltametría cíclica para determinar la corriente de fondo y diseñar una corriente residual aceptable para una concentración típica de 1 mM para una molécula con actividad electroquímica. Utilizamos tamices moleculares 3Å, seguidos de destilación sobre CaH2 y finalizamos con un tratamiento en Al2O3. El procedimiento optimizado produce CH3CN con pequeñas corrientes de fondo, aumentando la relación señal-ruido y minimizando las complicaciones químicas en una amplia ventana de potencial. Nuestro enfoque incluye la discriminación entre las impurezas del disolvente y en las sales del electrolito. Recristalizamos el TBAP con una mezcla de acetato de etilo y etanol al 95 %. El proceso y las directrices teóricas se pueden aplicar a otros electrolitos no acuosos con impurezas electroactivas, como moléculas orgánicas, oxígeno y agua.","PeriodicalId":17377,"journal":{"name":"Journal of the Mexican Chemical Society","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136239934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}