Incorporation of carboxylated pillar[5]arene and strontium() into supramolecular coordination complexes of different nuclearities

We show that the nuclearity of the 2-D coordination polymers of carboxylated pillar[5]arene with Sr( ii ) cations can be varied with the aid of 1,10-phenanthroline as a coligand. In the absence of metal cations, pillar[5]arene and 1,10-phenanthroline form an exclusion type supramolecular assembly through outer-surface interactions. The nuclearity of the coordination complexes of carboxylated pillar[5]arene and strontium( ii ) can be varied with the aid of phenanthroline as a coligand.