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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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Supramolecular Assembly-Driven Multilevel Fluorescent Encryption.

Ming Liu1,2, Honggang Mei1,2, Yanfang Wang1,2

  • 1Department of Chemistry, Stoddart Institute of Molecular Science, Zhejiang University, Hangzhou, 310058, P.R. China.

Angewandte Chemie (International Ed. in English)
|June 6, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed new multilevel luminescent materials using supramolecular self-assembly for advanced optical information encryption. This system offers dynamic, multicolor responses, enhancing data security capabilities.

Keywords:
CucurbiturilHost–guest interactionsInformation encryptionPolyrotaxaneSupramolecular polymers

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Area of Science:

  • Materials Science
  • Supramolecular Chemistry
  • Information Security

Background:

  • The digital era necessitates advanced information security solutions.
  • Optically responsive materials offer tunable, noninvasive encryption but are limited to static or binary states.
  • Developing high-capacity, multilevel encryption requires precisely controlled hierarchical responses.

Purpose of the Study:

  • To construct novel dynamically multilevel responsive luminescent materials.
  • To apply these materials to a multilevel information encryption system.
  • To explore stimuli-responsive and time-dependent characteristics for advanced encryption.

Main Methods:

  • Utilizing host-guest complexation between 4-phenylpyridine-functionalized isoquinoline derivatives (IQP) and CB[8] to form supramolecular polymers.
  • Investigating multicolor luminescence driven by dynamic protonation and host-guest interactions.
  • Employing reversible [2+2] photocycloaddition reactions within the supramolecular structure.

Main Results:

  • Successfully constructed linear supramolecular polymers (IQP⊂CB[8]) with dynamic multilevel luminescence.
  • Demonstrated reversible transformation between conjugated supramolecular polymers and nonconjugated polyrotaxanes via photocycloaddition.
  • Observed pronounced optical responses on a time gradient, alongside light, heat, and acid/base sensitivity.

Conclusions:

  • Developed a novel supramolecular system with reversible responsiveness and time-dependent characteristics.
  • Established a multichannel fluorescent cascade encryption platform.
  • Enabled multilevel information encryption with high capacity and dynamic control.