Novel anion receptors: hybrid materials based on quaternary ammonium salts for selective extraction of dichromate ions

作者：Tabisz Lukasz; Pankiewicz Radoslaw; Leska Boguslawa^*

来源：Tetrahedron Letters, 2014, 55(47): 6416-6419.

DOI：10.1016/j.tetlet.2014.09.117

• Hybrid materials
• Dichromate complexing agent
• Polyamine
• Potentiometric titration

Novel hybrid materials were obtained by modification of three (poly)amine-appended mesoporous silica gels. For all matrices of different side chain lengths, the process proceeded with excellent modification rates. The free analogues of these hybrid materials, podand-type receptors, were also prepared employing a very similar procedure. The organosilicas synthesized were characterized by NMR, infrared spectroscopy, and semi-empirical methods. Their anion exchange properties were conveniently investigated using precise, but also time and cost-efficient titration experiments, and the products were found to be powerful complexing agents for dichromate ions.

• 出版日期2014-11-19