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Switchable Fluorescence of a Three-Dimensional Coordination Polymer Based on Reversible Single-Crystal to
Dong Liu1, Jing Qi1, Zi-Yun Ye1
1Key Laboratory for Chemistry of Low-Dimensional Materials in Universities of Jiangsu Province, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, P. R. China.
Inorganic Chemistry
|July 7, 2026
Summary
Researchers developed a novel 3D photoreactive coordination polymer (CP) that exhibits reversible photo-switching. This smart material demonstrates potential for advanced applications like optical data storage and anti-counterfeiting technologies.
Area of Science:
- Materials Science
- Crystallography
- Photochemistry
Background:
- Photoreactive coordination polymers (CPs) are crucial for solid-state photochemistry.
- Their ordered frameworks enable photocontrolled smart materials for optoelectronics.
Purpose of the Study:
- To synthesize and characterize a novel 3D photoreactive coordination polymer.
- To investigate its photoresponsive behavior and potential applications.
Main Methods:
- Hydrothermal synthesis using Cd(NO3)2·4H2O, 1,4-naphthalenedicarboxylic acid (1,4-H2ndc), and 1,2-di(pyridin-3-yl)ethene (3,3'-dpe).
- Single-crystal to single-crystal (SCSC) transformation via [2+2] photocycloaddition under 365 nm UV irradiation.
- Reversible cycloreversion triggered by 254 nm UV light.
Main Results:
- A new 3D CP, {[Cd(1,4-ndc)(3,3'-tpcb)0.5]·0.5H2O}n (1a), was formed from the initial CP {[Cd(1,4-ndc)(3,3'-dpe)]·H2O}n (1) via SCSC reaction.
- The transformation between 1 and 1a is reversible upon UV irradiation.
- The reversible process is accompanied by distinct fluorescence changes, indicating photoswitchable fluorescence.
Conclusions:
- The synthesized CP exhibits reversible photo-switching behavior.
- This material shows promise for applications in optical information storage, anticounterfeiting, and fluorescence sensing.
