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Assessing citric acid-derived luminescent probes for pH and ammonia sensing: a comprehensive experimental and theoretical study

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dc.contributor.author Placer Vidal, Lorena
dc.contributor.author Estevez Guiance, Laura
dc.contributor.author Lavilla Beltran, Maria Isela
dc.contributor.author Pena Pereira, Francisco Javier
dc.contributor.author Bendicho Hernandez, Jose Carlos
dc.date.accessioned 2021-11-25T08:51:39Z
dc.date.available 2021-11-25T08:51:39Z
dc.date.issued 2021-11-22
dc.identifier.citation Analytica Chimica Acta, 1186: 339125 (2021) spa
dc.identifier.issn 00032670
dc.identifier.uri http://hdl.handle.net/11093/2748
dc.description Financiado para publicación en acceso aberto: Universidade de Vigo/CISUG
dc.description.abstract The present work reports on the assessment of luminescent probes derived from citric acid (CA) and β-aminothiols (namely, l-cysteine (Cys) and cysteamine) for instrumental and smartphone-based fluorimetric sensing purposes. Remarkably, the evaluated luminescent probes derived from natural compounds showed pH-dependent dual excitation/dual emission features. Both fluorophores hold promise for the ratiometric fluorimetric sensing of pH, being especially convenient for the smartphone-based sensing of pH via ratiometric analysis by proper selection of B and G color channels. Time dependent density functional theory (TDDFT) calculations allowed to substantiate the pH dependent structure-property relationship and to unveil the critical role of the CA derived carboxyl group, these findings contributing to the fundamental knowledge on these systems for the rational design of new fluorophores and in establishing fluorescence sensing mechanisms of CA-derived systems. Besides, paper-based devices modified with CA-Cys were implemented in a three-phase separation approach for sensitive and selective ammonia sensing, yielding a remarkable enrichment factor of 389 and a limit of detection of 37 μM under optimal conditions. The proposed approach was successfully applied to the determination of ammonia nitrogen and extractable ammonium in water samples and marine sediments, respectively. spa
dc.description.sponsorship Xunta de Galicia | Ref. ED431I 2020/04 spa
dc.description.sponsorship Xunta de Galicia | Ref. ED431C 2019/24 spa
dc.description.sponsorship Agencia Estatal de Investigación | Ref. RTI2018-093697-B-I00 spa
dc.language.iso eng en
dc.publisher Analytica Chimica Acta spa
dc.relation info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-093697-B-I00/ES/SISTEMAS ANALITICOS INNOVADORES BASADOS EN RECEPTORES NANOESTRUCTURADOS SOBRE SUSTRATOS (NANO)CELULOSICOS PARA LA DETECCION DE SUSTANCIAS DE INTERES MEDIOAMBIENTAL
dc.rights Attribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.title Assessing citric acid-derived luminescent probes for pH and ammonia sensing: a comprehensive experimental and theoretical study en
dc.type article spa
dc.rights.accessRights openAccess spa
dc.identifier.doi 10.1016/j.aca.2021.339125
dc.identifier.editor https://linkinghub.elsevier.com/retrieve/pii/S000326702100951X spa
dc.publisher.departamento Química analítica e alimentaria spa
dc.publisher.departamento Química Física spa
dc.publisher.grupoinvestigacion Química Analítica Ambiental e Espectroscopia spa
dc.publisher.grupoinvestigacion Química Cuántica spa
dc.subject.unesco 2301 Química Analítica spa
dc.date.updated 2021-11-24T11:39:36Z
dc.references The corresponding authors thank the Spanish Ministry of Science, Innovation and Universities (Project RTI2018-093697-B-I00), the Spanish State Research Agency and FEDER for financial support. F. Pena-Pereira thanks Xunta de Galicia (ED431I 2020/04) for financial support. L. Estévez thanks Universidade de Vigo for her research contract and Xunta de Galicia (Project ED431C 2019/24). The CACTI facilities (University of Vigo) are also acknowledged. This article is based upon work from the Sample Preparation Study Group and Network, supported by the Division of Analytical Chemistry of the European Chemical Society. Funding for open access charge: Universidade de Vigo/CISUG. spa


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