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Metal Cation-Responsive and Excitation-Dependent Nontraditional Multicolor Fluorescent Hydrogels for Multidimensional
Junwen Deng1, Hangrui Wu1, Wendi Xie1
1Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China.
ACS Applied Materials & Interfaces
|August 10, 2021
Summary
Researchers developed novel multicolor fluorescent polymeric hydrogels (MFPHs) using intrinsic fluorescence. These hydrogels enable multidimensional information encryption through a unique inkjet printing technique with metal cations.
Area of Science:
- Materials Science
- Polymer Chemistry
- Optoelectronics
Background:
- Multicolor fluorescent polymeric hydrogels (MFPHs) are crucial for information storage and encryption.
- Traditional MFPHs often rely on incorporated fluorescent materials.
- Nontraditional luminescent polymers are gaining attention for their unique properties.
Purpose of the Study:
- To develop a novel type of nontraditional MFPHs.
- To investigate the fluorescence properties and responsiveness of these new hydrogels.
- To demonstrate their application in multidimensional information encryption.
Main Methods:
- In situ polymerization of acrylamide (AAm) with poly(itaconic acid) (PITAc) to form intrinsically fluorescent hydrogels.
- Characterization of hydrogel fluorescence, excitation dependence, and metal cation responsiveness.
- Development and application of a multi-ion inkjet printing (MIIP) technique for pattern generation.
Main Results:
- The synthesized PAAm/PITAc hydrogels exhibit strong intrinsic fluorescence that is excitation-dependent and responsive to metal cations.
- Metal cation treatment results in excitation-dependent fluorescence, enabling visual pattern formation.
- The MIIP technique successfully printed variable texts and patterns, which could be altered through selective printing and erasing.
Conclusions:
- A new strategy for preparing nontraditional MFPHs with intrinsic fluorescence was established.
- The developed hydrogels offer a platform for multidimensional information encryption and encoding.
- This work opens avenues for advanced applications in smart materials and security technologies.
