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Functionalizable, Side Chain-Immolative Poly(benzyl ether)s.

Yue Xiao1, Yang Li1, Bohan Zhang1

  • 1Institute of Chemical Biology and Nanomedicine, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.

ACS Macro Letters
|June 2, 2022
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel self-immolative polymer (SIP) that degrades from the side chain. This new polymer, a side chain-immolative polymer (ScIP), degrades efficiently in the solid state, offering new possibilities for material science.

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Organic Chemistry

Background:

  • Self-immolative polymers (SIPs) are designed to depolymerize upon a trigger.
  • Traditional SIPs typically initiate degradation from the chain end.
  • Limited degradation efficiency in the solid state poses a challenge for current SIPs.

Purpose of the Study:

  • To develop a novel poly(benzyl ether)-based self-immolative polymer (SIP).
  • To engineer a SIP that undergoes degradation initiated from the side chain.
  • To investigate the solid-state degradation capabilities of the newly developed polymer.

Main Methods:

  • Synthesis of a poly(benzyl ether)-based polymer featuring pendant pyridine disulfide groups.
  • Initiation of depolymerization via cleavage of side-chain disulfides.
  • Modification of the polymer using thiol-disulfide exchange reactions to create graft polymers and organogels.

Main Results:

  • The synthesized side chain-immolative polymer (ScIP) demonstrated efficient degradation in the solid state.
  • Degradation was initiated by the cleavage of pendant disulfide groups, leading to phenolate formation and subsequent depolymerization.
  • Modified ScIP-graft-poly(ethylene glycol) and organogel structures also exhibited complete reductive self-immolative degradation.

Conclusions:

  • A novel side chain-immolative polymer (ScIP) based on poly(benzyl ether) was successfully synthesized.
  • The ScIP exhibits efficient solid-state degradation, overcoming limitations of traditional SIPs.
  • The developed ScIP platform is versatile and can be modified for various applications, including graft polymers and organogels.