Cibotaru Sandu, Ailincai Daniela, Andreica Bianca-Iustina, Cheng Xinjian, Marin Luminita
"Petru Poni" Institute of Macromolecular Chemistry, Gr. Ghica Voda Alley, 41A, 700487 Iasi, Romania.
School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430079, China.
Gels. 2022 Oct 26;8(11):692. doi: 10.3390/gels8110692.
This paper reports new solid materials based on TEGylated phenothiazine and chitosan, with a high capacity to recover mercury ions from aqueous solutions. They were prepared by hydrogelation of chitosan with a formyl derivative of TEGylated phenothiazine, followed by lyophilization. Their structural and supramolecular characterization was carried out by H-NMR and FTIR spectroscopy, as well as X-ray diffraction and polarized light microscopy. Their morphology was investigated by scanning electron microscopy and their photophysical behaviour was examined by UV/Vis and emission spectroscopy. Swelling evaluation in different aqueous media indicated the key role played by the supramolecular organization for their hydrolytic stability. Mercury recovery experiments and the analysis of the resulting materials by X-ray diffraction and FTIR spectroscopy showed a high ability of the studied materials to bind mercury ions by coordination with the sulfur atom of phenothiazine, imine linkage, and amine units of chitosan.
本文报道了基于聚乙二醇化吩噻嗪和壳聚糖的新型固体材料，它们具有从水溶液中回收汞离子的高能力。它们是通过壳聚糖与聚乙二醇化吩噻嗪的甲酰基衍生物进行水凝胶化，然后冻干制备的。通过核磁共振氢谱（H-NMR）、傅里叶变换红外光谱（FTIR）、X射线衍射和偏光显微镜对其结构和超分子特征进行了表征。通过扫描电子显微镜研究了它们的形态，并通过紫外可见光谱和发射光谱检查了它们的光物理行为。在不同水性介质中的溶胀评估表明超分子组织对其水解稳定性起关键作用。汞回收实验以及通过X射线衍射和FTIR光谱对所得材料的分析表明，所研究的材料具有通过与吩噻嗪的硫原子、壳聚糖的亚胺键和胺单元配位来结合汞离子的高能力。
