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

Abstract

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.