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Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application

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Engineering Ultrahigh-Contrast Photoactivated Room-Temperature Phosphorescence With a Robust and Universal

Ya Ting Gao¹, Ying Zhang¹, Bin Bin Chen¹

¹Key Laboratory for Advanced Materials, Shanghai Key Laboratory of Functional Materials Chemistry, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology & Dynamic Chemistry, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, P. R. China.

Angewandte Chemie (International Ed. in English)

|April 21, 2026

Summary

New ureido-functionalized siloxane networks enable highly efficient and stable photoactivated room-temperature phosphorescence (pRTP) systems. These materials offer ultrahigh contrast and long-term performance for advanced applications like information encryption.

Keywords:

host‐guest system information encryption photoactivated room‐temperature phosphorescence siloxane network ureido functionalization

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Area of Science:

Materials Science
Photochemistry
Supramolecular Chemistry

Background:

Photoactivated room-temperature phosphorescence (pRTP) systems offer tunable, reversible light emission.
Traditional polymer hosts struggle with efficient photoactivation and stability due to oxygen permeability.

Purpose of the Study:

To develop a novel, stable host matrix for pRTP systems.
To enhance photoactivation efficiency and phosphorescence contrast.
To explore applications in information encryption.

Main Methods:

Synthesized a ureido-functionalized siloxane network via hydrolysis of γ-ureidopropyltriethoxysilane (UPTES).
Doped the UPTES-based network with various phosphorescent guest molecules.
Investigated UV-induced oxygen consumption for photoactivation and characterized phosphorescence properties.

Main Results:

Achieved up to ~2100-fold increase in phosphorescence intensity and ~65-fold longer lifetime.
Demonstrated superior photoactivation efficiency due to ureido groups' oxygen-trapping capability.
Maintained stable pRTP performance for over 90 days in various challenging conditions.

Conclusions:

UPTES-derived siloxane networks provide a robust platform for ultrahigh-contrast pRTP materials.
The developed systems exhibit exceptional stability and photoresponsive properties.
Enabled on-demand customization for advanced multi-level information encryption.