Phthalocyanine-Functionalized Magnetic Silica Nanoparticles as Anion Chemosensors
authors Rodrigues, JMM; Farinha, ASF; Lin, Z; Cavaleiro, JAS; Tome, AC; Tome, JPC
nationality International
journal SENSORS
author keywords anions; anion binding; chemosensor; magnetic nanoparticles; phthalocyanines
abstract 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 approximate to 4.0 mu M. In water, the new hybrid chemosensor demonstrated selectivity and sensitivity for CN- and OH- anions with LoD of approximate to 0.2 mu M. The new hybrids are easily recovered using a magnet, allowing recyclability and reusability, after acidic treatment, without losing the sensing proprieties.
publisher MDPI
isbn 1424-8220
year published 2021
volume 21
issue 5
digital object identifier (doi) 10.3390/s21051632
web of science category 13
subject category Chemistry, Analytical; Engineering, Electrical & Electronic; Instruments & Instrumentation
unique article identifier WOS:000628549600001
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journal analysis (jcr 2019):
journal impact factor 3.275
5 year journal impact factor 3.427
category normalized journal impact factor percentile 74.528
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