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Experimental and Data Analysis Workflow for Soft Matter Nanoindentation
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Robust helix photo-transforming in soft matter.

Mengqi Li1,2, Honglong Hu1,2,3, Zhi-Gang Zheng2,3

  • 1Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Shanghai Key Laboratory of Functional Materials Chemistry, Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China.

National Science Review
|February 5, 2026
PubMed
Summary

Researchers developed a novel chiral photoswitch for dynamic control of helicity in soft materials. This breakthrough enables light-triggered manipulation of helical pitch and chirality, paving the way for advanced chiro-optics and information processing.

Keywords:
chiral photoswitchcircularly polarized luminescencehelical twisting powerliquid crystalsphotochromism

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Area of Science:

  • Soft Condensed Matter Physics
  • Organic Chemistry
  • Materials Science

Background:

  • Helical structures are fundamental in various soft materials, including DNA and liquid crystals.
  • Controlling helicity dynamically with light in soft matter remains a significant challenge.

Purpose of the Study:

  • To report a novel method for photo-transformation of helicity in soft matter.
  • To achieve robust manipulation of helical pitch and chirality inversion using light.

Main Methods:

  • Molecular design incorporating a multi-branched dendron-like chiral photoswitch.
  • Balancing long-range order and short-range disorder states.
  • Utilizing resonance coupling and inherent luminescence for stimulated circularly polarized luminescence (CPL).

Main Results:

  • Achieved ultra-large helical twisting power (HTP) and a broad dynamic spectral range (400-3000 nm).
  • Demonstrated robust manipulation of helical pitch and chirality inversion.
  • Generated stimulated CPL with a dissymmetric factor of 1.97, near the theoretical limit.

Conclusions:

  • The developed chiral photoswitch offers precise dynamic control over soft matter helicity.
  • This approach enables photo-tailorable infrared beams and high-dimensional coding.
  • Presents a robust strategy for advancements in dynamic soft matter, chiro-optics, and information processing.