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Water-Operable Photochromic Perovskite-Like Materials for Rewritable Anti-Counterfeiting and Display.

De-Lin Hu1,2, Fei-Ping Lai1,2, Jia-Hao Wang1,2

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

Chemistry (Weinheim an Der Bergstrasse, Germany)
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PubMed
Summary
This summary is machine-generated.

Researchers developed a water-stable photochromic material for underwater applications. This novel hybrid material enables robust information writing and erasing in wet environments, overcoming limitations of existing organic and inorganic systems.

Keywords:
electron transferperovskitephotochromicwater stability

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Area of Science:

  • Materials Science
  • Chemistry

Background:

  • Stimuli-responsive photochromic materials are crucial for advanced applications like information encryption and smart displays.
  • Existing purely organic photochromic materials often exhibit high water solubility, while inorganic counterparts face challenges in cost-effective fabrication.
  • There is a significant need for water-stable and water-operable photochromic materials suitable for underwater information writing and wet-environment anti-counterfeiting.

Purpose of the Study:

  • To design and synthesize a novel water-stable photochromic material.
  • To investigate the photochromic properties and operational capabilities of the material in aqueous environments.
  • To address the limitations of current photochromic materials in water-related applications.

Main Methods:

  • Synthesis of a 1D perovskite-like lead chloride hybrid material, (AeBpy)2Pb3Cl10, incorporating a viologen-based organic dication (N-(2-aminoethyl)-4,4'-bipyridinium).
  • Characterization of the material's structure, including its 1D inorganic backbone and organic dication.
  • Evaluation of the photochromic performance, including photoinduced electron transfer, coloration/decoloration kinetics, thermal stability, and operability in water.

Main Results:

  • A water-stable 1D perovskite-like lead chloride hybrid, (AeBpy)2Pb3Cl10, was successfully synthesized.
  • The material exhibits rapid photochromism upon light irradiation (coloration within 10 s) and efficient thermal decoloration (complete within 10 min at 160°C).
  • Crucially, the photochromic response is operable directly in water, enabling aqueous information writing and thermal erasing, supporting robust write/erase cycles.

Conclusions:

  • This work presents a viable materials design strategy for achieving water-stable and water-operable photochromic systems.
  • The developed hybrid material overcomes the water solubility issues of organic systems and fabrication constraints of inorganic systems.
  • The findings enable new possibilities for underwater information writing, wet-environment anti-counterfeiting, and rewritable displays.