Real-time potentiometric monitoring of tetrachloroaurate(III) with an Ion-selective electrode and its applications to HAuCl4 iodide-catalyzed reduction by hydroxylamine

Almagro Gómez, Carmen M.; Hernández Cifre, José G.; Ortuño Sánchez-Pedreño, Joaquín A.

Publication:
Real-time potentiometric monitoring of tetrachloroaurate(III) with an Ion-selective electrode and its applications to HAuCl4 iodide-catalyzed reduction by hydroxylamine

dc.contributor.author	Almagro Gómez, Carmen M.
dc.contributor.author	Hernández Cifre, José G.
dc.contributor.author	Ortuño Sánchez-Pedreño, Joaquín A.
dc.contributor.department	Química Física
dc.date.accessioned	2025-01-21T07:53:01Z
dc.date.available	2025-01-21T07:53:01Z
dc.date.issued	2024-06-01
dc.description	© 2024 by the authors. This manuscript version is made available under the CC-BY 4.0 license http://creativecommons.org/licenses/by/4.0/ This document is the Published Manuscript version of a Published Work that appeared in final form in Chemosensors. To access the final edited and published work see https://doi.org/10.3390/chemosensors12060095
dc.description.abstract	Ion-selective electrodes for tetrachloroaurate(III) have been developed for potentiometric monitoring of the reduction reaction of tetrachloroaurate(III). Three different plasticized polyvinyl chloride membranes containing tridodecymethylammonium chloride as an anion exchanger were investigated. These membranes differ in the plasticizer used, either 2-nitrophenyl octyl ether (NPOE) or tricresyl phosphate (TCP) or bis-(2-ethylhexyl) sebacate (DOS). The potentiometric response of the electrodes to the tetrachloroaurate(III) concentration was studied by two methods. In the first method, commonly used in the calibration of ion-selective electrodes, successive tetrachloroaurate(III) concentration increments were used and the potential was allowed to stabilize after each concentration step. The second method was developed to mimic the tetrachloroaurate(III) reduction reaction in which there is a continuous decrease in the concentration of tetrachloroaurate(III). This was achieved by continuously diluting an initial concentration of tetrachloroaurate(III) by pumping a diluent solution while keeping the sample volume constant. This method gave an excellent linear response to the tetrachloroaurate(III) concentration. The calibrated electrodes were used for the potentiometric monitoring of the kinetics of a newly observed reaction: the reduction of tetrachloroaurate(III) by hydroxylamine catalyzed by iodide. A mechanism for this reaction is proposed on the basis of the experimental results obtained.	es
dc.format	application/pdf	es
dc.format.extent	12	es
dc.identifier.citation	Chemosensors, 2024, Vol. 12 (6) : 95
dc.identifier.doi	https://doi.org/10.3390/chemosensors12060095
dc.identifier.issn	Electronic: 2227-9040
dc.identifier.uri	http://hdl.handle.net/10201/148852
dc.language	eng	es
dc.publisher	MDPI	es
dc.relation	1) Proyecto nacional PID2022-136568NB-I00, Ministerio de Ciencia e Innovación (MCIN/AEI/10.13039/501100011033), 2) Proyecto regional "Desarrollo de metodologías para la caracterización estructural de macromoléculas y nanopartículas en disolución. Aplicaciones a sistemas biológicos y materiales sintéticos", 20933/PI/18, Fundación Séneca (Agencia Regional para la Ciencia y la Tecnología de la Región de Murcia), 3) Proyecto nacional "Theory guided optimization of heterogeneous electrochemical reactions involved in electrical energy storage and conversion devices", TED2021-130334B-I00 (NextGenerationEU/PRTR), Ministerio de Ciencia, Innovación y Universidades.	es
dc.relation.publisherversion	https://www.mdpi.com/2227-9040/12/6/95	es
dc.rights	info:eu-repo/semantics/openAccess	es
dc.rights	Atribución 4.0 Internacional	*
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/	*
dc.subject	Tetrachloroaurate III	es
dc.subject	Ion selective electrodes	es
dc.subject	Potentiometric monitoring	es
dc.subject	Tetrachloroaurate III reduction	es
dc.subject.other	CDU::5 - Ciencias puras y naturales::54 - Química::543 - Química analítica	es
dc.title	Real-time potentiometric monitoring of tetrachloroaurate(III) with an Ion-selective electrode and its applications to HAuCl4 iodide-catalyzed reduction by hydroxylamine	es
dc.type	info:eu-repo/semantics/article	es
dspace.entity.type	Publication	es