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Polymerization-Induced Sulfone-Bond-Driven Self-Assembly
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DOI：10.1021/acs.macromol.4c02860.png)
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Abstract
En 中文
Sulfone bonding refers to dipole-dipole interactions between sulfone groups, which have been long overlooked. Herein, sulfone bonding was employed for the first time as the driving force for the self-assembly of block copolymers via a polymerization-induced sulfone-bond-driven self-assembly (PI-SDSA) strategy. The presence of sulfone bonding in a sulfone-functionalized monomer was first confirmed by scanning tunneling microscopy break junction measurements at the single-molecule level. Successful PI-SDSA was achieved in toluene, and the polymerization kinetics confirmed the polymerization-enhanced sulfone bonding as the driving force. The PI-SDSA was demonstrated to possess a peculiar monomer/solvent library by the successful PI-SDSA of a series of sulfone-containing monomers in solvents with varying dipole moments. The as-prepared sulfone-functionalized polymer assemblies manifested unique salt-responsiveness because of the competitive ion-dipole interactions between the ions and sulfone groups, enabling the salt-responsive payload release. The use of sulfone bonding as the driving force for self-assembly has provided a new perspective for both the polymerization-induced self-assembly and the self-assembly of block copolymers and will inspire the design of stimuli-responsive supramolecular materials.
Keywords:
DISPERSION POLYMERIZATION
SULFOXIDE