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Stable Diradical-Derived Conjugated Radical Polymers.

Lingli Zhao1, Hao Liu1, Wenhao Li2

  • 1State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P.R. China.

Angewandte Chemie (International Ed. in English)
|May 12, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed stable conjugated radical polymers (RPs) with delocalized spins. These materials exhibit unique electronic and spin properties, showing promise for optoelectronics and quantum applications.

Keywords:
Conjugated radical polymerQuantum coherence propertiesSemiconducting propertiesStructure‐property relationshipsπ‐Magnetization

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Quantum Computing

Background:

  • Conjugated radical polymers (RPs) are crucial for spin-correlated condensed matter physics and quantum applications.
  • Challenges exist in synthesizing stable RPs with delocalized spin properties.

Purpose of the Study:

  • To develop a facile method for synthesizing stable conjugated radical polymers.
  • To investigate the electronic and spin properties of these novel RPs.

Main Methods:

  • Synthesized two ambient-stable conjugated RPs (RPH and RPC) via copolymerization of brominated diradical monomers and bis-stannylated DPP units.
  • Characterized the RPs' spin-delocalization, electronic properties (near-infrared absorption, redox behavior), and π-paramagnetism.

Main Results:

  • Achieved favorable spin-delocalization in RPs with S=1/2 ground states.
  • Observed intense near-infrared absorptions (>1000 nm) and multi-stage amphoteric redox characteristics.
  • Demonstrated superior ambipolar carrier transport in RPH thin films (mobility up to 0.41/0.38 cm² V⁻¹ s⁻¹) and significant room-temperature quantum coherence times (T₁ = 1.88 µs, T₂ = 218 ns).

Conclusions:

  • Introduced a straightforward approach for constructing stable conjugated RPs.
  • Highlighted the integrated electronic and spin properties of RPs for optoelectronics and quantum information manipulation.