Single and double crown macrocyclic derivatives of cyclotriphosphazene as receptors of silver(I) ions

We report the preparation of new single and double PNP-lariat ether derivatives. L1 was synthesized from a MONO-ANSA precursor and L2 was synthesized from a BIS-ANSA precursor by subsequent substitution of the chlorine atoms. The reactive chlorine atoms were substituted by piperidinyl groups. Their structures were established by elemental analysis, MS, 1H NMR, 31P NMR and 13C NMR spectroscopy. Furthermore, this work includes an investigation of the complexation of silver(I) ions by the two new ligands in methanol and acetonitrile solutions. 1H NMR, 31P NMR and 13C NMR spectra were recorded to investigate how the complexation of silver(I) ions by the investigated macrocyclic ligands occurs.