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Kalluvettukuzhy NK, Maciejczyk MR, Robertson N. Thermally activated delayed fluorescence emitters for efficient sensitization of europium(III). Phys Chem Chem Phys 2024; 26:18129-18137. [PMID: 38896039 DOI: 10.1039/d4cp01610f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
We demonstrate for the first time a unique approach to efficiently sensitize lanthanides(III) using photosensitizer ligands that show thermally activated delayed fluorescence (TADF). TADF ligands have very small singlet (S1) and triplet (T1) excited state energy splitting and S1/T1 energy levels are in optimum energy to the acceptor level of Eu(III) to enable high energy transfer efficiency. The synthesized Eu(III) coordination polymers with TADF ligands showed bright red luminescence with an outstanding sensitization efficiency of 90-94% and Φtot of 79-85% in poly(methyl methacrylate) encapsulated films. This rational approach of efficiently sensitizing lanthanides with TADF ligands demonstrates their great potential for imaging and optical communications applications.
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Affiliation(s)
- Neena K Kalluvettukuzhy
- EaStCHEM School of Chemistry, The University of Edinburgh, Kings Buildings, Edinburgh EH9 3FJ, UK.
| | - Michal R Maciejczyk
- EaStCHEM School of Chemistry, The University of Edinburgh, Kings Buildings, Edinburgh EH9 3FJ, UK.
| | - Neil Robertson
- EaStCHEM School of Chemistry, The University of Edinburgh, Kings Buildings, Edinburgh EH9 3FJ, UK.
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Yuan Y, Wang Y, Awasthi P, Dong W, Chen D, Qiao X, Wang Z, Qian G, Fan X. Methyl methacrylate-modified polystyrene microspheres: an effective strategy to enhance the fluorescence of Eu-complexes. Phys Chem Chem Phys 2024; 26:17622-17630. [PMID: 38864339 DOI: 10.1039/d4cp01454e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
The in vitro detection applications of europium complex-doped microspheres mainly rely on strong fluorescence intensity and a well-defined morphology. In this work, using methyl methacrylate-modified polystyrene microspheres has been proven an effective strategy to enhance the fluorescence and morphology of Eu-complexes. The experimental results showed that the modification resulted in the formation of a porous structure within the polystyrene microspheres, enhancing the doping uniformity and facilitating a more significant accumulation of fluorescent molecules. Furthermore, because of their encapsulation ability, microspheres efficiently confine the fluorescent molecules within them. In addition, the nano-scale porous structure endowed the microspheres with enhanced properties without compromising solvent swelling capability, thereby significantly boosting the fluorescence performance of porous PSMMA. In lateral flow immunoassays (LFIAs), PSMMA-Eu microspheres were effectively utilized to detect fentanyl with exceptional sensitivity by capitalizing on these benefits, capable of detecting concentrations as low as 0.10 ng mL-1. This technology has significant potential for rapid point-of-care screening and clinical applications.
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Affiliation(s)
- Yuwen Yuan
- State Key Laboratory of Silicon and Advanced Semiconductor Materials & School of Materials Science and Engineering, Zhejiang University, Hangzhou 310058, China.
| | - Yunpeng Wang
- State Key Laboratory of Silicon and Advanced Semiconductor Materials & School of Materials Science and Engineering, Zhejiang University, Hangzhou 310058, China.
| | - Pragati Awasthi
- State Key Laboratory of Silicon and Advanced Semiconductor Materials & School of Materials Science and Engineering, Zhejiang University, Hangzhou 310058, China.
| | - Wenkun Dong
- Assure Tech. (Hangzhou) Co., Ltd, Hangzhou 310015, China
| | - Dong Chen
- Assure Tech. (Hangzhou) Co., Ltd, Hangzhou 310015, China
| | - Xvsheng Qiao
- State Key Laboratory of Silicon and Advanced Semiconductor Materials & School of Materials Science and Engineering, Zhejiang University, Hangzhou 310058, China.
- Longmen Laboratory of Luoyang, Luoyang 471000, China
| | - Zhiyu Wang
- State Key Laboratory of Silicon and Advanced Semiconductor Materials & School of Materials Science and Engineering, Zhejiang University, Hangzhou 310058, China.
| | - Guodong Qian
- State Key Laboratory of Silicon and Advanced Semiconductor Materials & School of Materials Science and Engineering, Zhejiang University, Hangzhou 310058, China.
| | - Xianping Fan
- State Key Laboratory of Silicon and Advanced Semiconductor Materials & School of Materials Science and Engineering, Zhejiang University, Hangzhou 310058, China.
- Ocean Academy, Zhejiang University, Zhoushan 316021, China
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