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Ethylene Polymerizations Using Parallel Pressure Reactors and a Kinetic Analysis of Chain Transfer Polymerization
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Donor-Acceptor Engineering Enables Kinetic Control of Chirality Transfer in Side Chain Polymers.

Tengfei Miao1, Meng Liu2, Zixiang He3

  • 1Jiangsu Key Laboratory For Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian, Jiangsu, China.

Angewandte Chemie (International Ed. in English)
|February 6, 2026
PubMed
Summary

Researchers engineered chiral polymers with tunable azobenzene side chains. Electronically controlled substituents on the azobenzene unit dictate the supramolecular helix

Keywords:
azobenzenechiral inversionchirality transferdipole momentdonor‐acceptor

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Supramolecular Chemistry

Background:

  • Chirality transfer in hierarchical architectures is crucial for chiral materials.
  • Designing functional chiral materials with predictable chirality remains a challenge.

Purpose of the Study:

  • To investigate the role of electronic properties in controlling supramolecular chirality.
  • To develop a framework for designing adaptive chiral materials with programmable handedness.

Main Methods:

  • Molecular engineering of side-chain azobenzene polymers with chiral α-terminal groups.
  • Modulation of chromophore dipole moment using electron-donating (D) or electron-withdrawing (A) substituents.
  • Analysis of long-range helical reorganization driven by electronic effects.

Main Results:

  • The dipole moment of the azobenzene chromophore dictates the absolute inversion of the supramolecular helix.
  • Substituent-dependent dipole reorientation leads to helical reorganization via π-π and van der Waals interactions.
  • Chirality transfer can be controlled to follow thermodynamic preference, invert, or exhibit multiplexed behavior.

Conclusions:

  • Electronic control offers a transformative approach to chirality transfer, surpassing classical steric models.
  • This provides a new framework for designing adaptive chiral materials with programmable handedness.
  • Potential applications include photonic circuits, enantioselective nanosensors, and bioinspired metamaterials.