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Author(s): |
Jian Chen, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Pei-sheng Zhang, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Xian-yong Yu, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Xiao-fang Li, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Hong-wen Tao, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Ping-gui Yi, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China |
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Abstract: |
In this work, the two fluorophores (9, 10-diphenyl anthracene, (DPA) and spiropyran containing methacrylate, (SPMA)) were incorporated into polymeric nanoparticles to constitute novel FRET systems via a one-step miniemulsion polymerization. Spectroscopic characteristics demonstrate that the two fluorophores have been successfully embedded into the nanoparticles. In addition, the UV and visible light can be applied to modulate the fluorescence emission of DPA dye in nanoparticles. Upon UV irradiation, the spiropyran moieties in nanoparticles converted to the open-ring (McH form) structure and upon visible light irradiation they turned back to the close-ring (SP form) structure, as a result the fluorescence of DPA can be reversibly “switched off” and “switched on”. The fluorescence resonance energy transfer (FRET) from the excited DPA dye molecules to the McH form of spiropyran moieties is the driving force behind the fluorescence modulation. The nanoparticles display fairly good fluorescent modulation property upon alternate UV/visible light irradiation. Thus, they have potential applications in biological, optical field and so on.
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