Supramolecular polymers, assembled from low molecular weight monomers via noncovalent interactions, such as hydrogen bonding, metal coordination as well as host-guest interactions, have demonstrated traditional polymeric properties and become an important source for the development of stimuli-responsive dynamic materials. We are interested in the fabrication of supramolecular polymers based on host-guest molecular recognition motifs. Self-sorting organization of two AB–type heteroditopic monomers led to the formation of linear supramolecular alternating copolymers driven by host-guest noncovalent interactions based on the bis(p-phenylene)-34-crown-10/paraquat derivative and dibenzo-24-crown-8/dibenzylammonium salt recognition motifs. By utilization of host-guest and metal-ligand noncovalent recognitions motifs, different topologies of supramolecular polymers, such as linear and crosslinked species, can be reversibly interconverted by external stimuli. Based on the dibenzo-24-crown-8/1,2-bis(pyridinium)ethane recognition motif, a hyperbranched mechanically interlocked polymer was prepared by polyesterification of an easily available dynamic trifunctional AB<sub>2</sub> pseudorotaxane monomer. By utilization of a crown ether-based host-guest recognitions motif, a supramolecular polymer gel constructed from a low molecular weight A-B monomer shows thermo- and pH-induced reversible gel-sol transitions. The thermal- and pH-responsive gel-sol transitions were successfully employed in the controlled release of Rhodamine B.

Supramolecular polymers based on host-guest molecular recognition motifs

251st National Meeting (2016)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.