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Polymer Free Volume-Controlled Molecular Clock and Emitter for Multicolored Transient Data Display in Advanced

Xiaocheng Zhang1,2,3, Rumeng Yang1,2,3, Yu Dong1,4

  • 1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao West Road, Fuzhou, Fujian, 350002, P. R. China.

Angewandte Chemie (International Ed. in English)
|June 26, 2024
PubMed
Summary

Researchers developed a novel polymer material that acts as a "molecular clock" and "emitter" for advanced data security. This smart material displays time-dependent information and dynamic multicolor fluorescence, enhancing encryption and anticounterfeiting capabilities.

Keywords:
dynamic anticounterfeitingfull-color emissionphoto-switchrigidity-controlled color and emissiontransient information display

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Optoelectronics

Background:

  • Growing demand for data security necessitates smart materials with temporal display and dynamic multicolor fluorescence.
  • Integrating both temporal and multicolor fluorescence features into responsive molecules remains a significant challenge.

Purpose of the Study:

  • To construct a polymer-based molecular system combining time-dependent display and dynamic multicolor fluorescence.
  • To develop a versatile material for advanced encryption and anticounterfeiting applications.

Main Methods:

  • Covalently embedding a spiropyran (SP) molecular switch into a poly(pentafluorophenyl acrylate) (pPFPA) polymer network.
  • Controlling polymer crosslink density and free volume via aminolysis with varying amounts of diamine crosslinkers.
  • Introducing a fluorescent probe (PTF1) sensitive to polymer rigidity for phototunable emission.

Main Results:

  • Generated pPFPA-co-SP networks with tunable crosslink densities, influencing the SP/MC isomerization rate and enabling time-dependent photochromism.
  • Achieved phototunable dynamic full-color emission by leveraging the PTF1 probe's response to polymer rigidity.
  • Demonstrated a synergistic response of the system to polymer network rigidity for dual functionality.

Conclusions:

  • Successfully developed a polymer-free volume-controlled "molecular clock and emitter" with time-dependent data display and dynamic multicolor fluorescence.
  • The material's dual functionality, achieved through a single synthetic strategy, offers significant potential for high-security encryption and anticounterfeiting.
  • This work provides a novel approach for designing advanced smart materials with integrated temporal and optical responsive features.