Pyridylmethylsilanes as dicarboxyacid receptors: Experimental and theoretical study

A series of literature known (1–3) [1], [2], [3] and [4] and new Si-tripodal receptors for anion sensing, based on 1–3 pyridylmethyl functionalized side arms as recognition sites, was designed, successfully synthesized and characterized by 1H and 13C NMR spectra (4–9). These ligands showed high selectivity and strong binding affinity toward investigated dicarboxyacid anions. The complexes formation was confirmed by 19F NMR spectra.All supramolecular complexes were structurally authenticated using parametric method 5 (PM5) with the MO-G for SCIGRESS program. The results brought information of the type and nature of intermolecular interactions present in the complexes and extended structures.

► A series of new Si-tripodal receptors, based on 1-3 pyridylmethyl was synthesized. ► All new compounds was characterized by 1H and 13C NMR. ► A new complexes between synthesised species and dicarboxyacid anions was obtained and studied by 19F NMR. ► All supramolecular complexes were structurally authenticated using quantum-mechanical calculation.