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.
subject category
Chemistry, Analytical; Engineering, Electrical & Electronic; Instruments & Instrumentation
authors
Rodrigues, JMM; Farinha, ASF; Lin, Z; Cavaleiro, JAS; Tome, AC; Tome, JPC
our authors
João M. M. Rodrigues
Junior Researcher
Zhi Lin
Principal ResearcherGroups
1 - inorganic functional nanomaterials and organic-inorganic hybrids
5 - biomedical and biomimetic materials
acknowledgements
This project had funding for its development from QOPNA, LAQV-REQUIMTE, CICECO, and Centro de Quimica Estrutural (please see below).