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.

中文翻译：

---

酞菁官能化的磁性二氧化硅纳米粒子作为阴离子化学传感器

阴离子物质是残留和淡水中最常见的污染物之一。水中存在的人为阴离子会大大增加对生物的毒性。在这里，我们报告基于接枝到铁磁性二氧化硅纳米粒子上用于阴离子检测和去除的三（甲苯磺酰基氨基）酞菁的新型光学活性材料的制备。事实证明，新的不对称酞菁（Pcs）是几种阴离子（AcO-，Br-，Cl-，CN-，F-，H ₂ PO _4-，HSO _4-，NO _2-，NO _3的优异化学传感器-和OH-）在二甲基亚砜（DMSO）中。此外，将Pcs接枝到磁性纳米颗粒上。所得的新型杂化材料对DMSO中的CN-，F-和OH-阴离子表现出选择性和敏感性，检测限（LoD）约为4.0 µM。在水中，这种新型的混合化学传感器表现出对CN-和OH-阴离子的选择性和灵敏度，LoD约为0.2 µM。新的混合动力汽车易于使用磁铁进行回收，经过酸处理后可实现回收利用和再利用，而不会失去传感性能。