A dual-responsive hyperbranched supramolecular polymer constructed by cooperative host–guest recognition and hydrogen-bond interactions

Abstract

A homotritopic pillar[5]arene (H₃) containing adenine units was synthesized and employed to interact with a uracil derivative (6-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)hexanenitrile, G) to form a hyperbranched supramolecular polymer. The hyperbranched supramolecular polymer showed a dual stimulus response both to heat and acid/base. The cooperative host–guest binding and hydrogen-bond interactions play a key role in the supramolecular polymerization.