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Open AccessArticle

Phthalocyanine-Functionalized Magnetic Silica Nanoparticles as Anion Chemosensors

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LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
2
Water Desalination and Reuse Center (WDRC), Division of Biological and Environmental Sciences (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
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CICECO and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
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CQE, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
*
Authors to whom correspondence should be addressed.
Academic Editor: Roberto Pizzoferrato
Sensors 2021, 21(5), 1632; https://doi.org/10.3390/s21051632
Received: 21 January 2021 / Revised: 16 February 2021 / Accepted: 21 February 2021 / Published: 26 February 2021
(This article belongs to the Special Issue Optical Chemical Sensors: Design and Applications)
Anionic species are one of the most common pollutants in residual and freshwaters. The presence of anthropogenic anions in water drastically increases the toxicity to living beings. Here, we report the preparation of a new optical active material based on tri(tosylamino)phthalocyanines grafted to ferromagnetic silica nanoparticles for anion detection and removal. The new unsymmetrical phthalocyanines (Pcs) proved to be excellent chemosensors for several anions (AcO−, Br−, Cl−, CN−, F−, H2PO4−, HSO4−, NO2−, NO3−, and OH−) in dimethyl sulfoxide (DMSO). Furthermore, the Pcs were grafted onto magnetic nanoparticles. The resulting novel hybrid material showed selectivity and sensitivity towards CN−, F−, and OH− anions in DMSO with limit of detection (LoD) of ≈4.0 µM. In water, the new hybrid chemosensor demonstrated selectivity and sensitivity for CN− and OH− anions with LoD of ≈0.2 µM. The new hybrids are easily recovered using a magnet, allowing recyclability and reusability, after acidic treatment, without losing the sensing proprieties. View Full-Text
Keywords: anions; anion binding; chemosensor; magnetic nanoparticles; phthalocyanines anions; anion binding; chemosensor; magnetic nanoparticles; phthalocyanines
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MDPI and ACS Style

Rodrigues, J.M.M.; Farinha, A.S.F.; Lin, Z.; Cavaleiro, J.A.S.; Tome, A.C.; Tome, J.P.C. Phthalocyanine-Functionalized Magnetic Silica Nanoparticles as Anion Chemosensors. Sensors 2021, 21, 1632. https://doi.org/10.3390/s21051632

AMA Style

Rodrigues JMM, Farinha ASF, Lin Z, Cavaleiro JAS, Tome AC, Tome JPC. Phthalocyanine-Functionalized Magnetic Silica Nanoparticles as Anion Chemosensors. Sensors. 2021; 21(5):1632. https://doi.org/10.3390/s21051632

Chicago/Turabian Style

Rodrigues, João M.M.; Farinha, Andreia S.F.; Lin, Zhi; Cavaleiro, José A.S.; Tome, Augusto C.; Tome, Joao P.C. 2021. "Phthalocyanine-Functionalized Magnetic Silica Nanoparticles as Anion Chemosensors" Sensors 21, no. 5: 1632. https://doi.org/10.3390/s21051632

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