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August 14, 2026Nature CommunicationsOpen Access

Water triggers visible-light photochromism in a hydrogen-bonded organic framework

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Authors

HLHaibo LiangLTLinjing TongGLGan Luo

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Overview

Materials study demonstrates reversible visible-light photochromism triggered by water in an organic framework, indicating potential for recyclable smart textiles and encrypted inks.

Key Points

  • To create a reversible visible-light photochromic system within a hydrogen-bonded organic framework using water adsorption as an activation trigger.
  • Synthesized a pyrene-based hydrogen-bonded organic framework (HOF-14) incorporating dynamic hydrogen-bonding networks and periodic pi-stacked columns.
  • Formulated the framework into photochromic inks, hydrogels, and smart fabrics to evaluate optical response, switching kinetics, recyclability, and application in information encryption.
  • Water adsorption triggered lattice contraction via dynamic hydrogen bonding, reducing exciton binding energy below ambient thermal energy to enable visible-light electron-hole separation.
  • The framework underwent a rapid color transition from yellow to green within 10 seconds under visible light, maintaining reversibility across more than 50 switching cycles.
  • Demonstrated secure information encryption and closed-loop recyclable adaptive camouflage textiles enabled by the intrinsic self-repair capability of the framework.

Cite This Study

Liang et al. (2026) studied this question.

synapsesocial.com/papers/6a7ec7aab70b84ec8b9142e7https://doi.org/10.1038/s41467-026-76746-3
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