Abstract
Europium complexes Eu(BA)3phen (BA = benzoic acid, phen = 1,10-phenanthroline) and Terbium complexes Tb(BA)3phen are incorporated into polyvinyl pyrrolidone (PVP) and electrospun into [Eu(BA)3phen + Tb(BA)3phen]/PVP composite nanofibers. The morphologies and properties of the final products are investigated via scanning electron microscopy, energy dispersive spectrometry,X-ray powder diffractometry, fluorescence spectroscopy, Fourier-transform infrared spectroscopy and thermogravimetry. The diameter of the composite nanofibers is 431.55 ± 3.14 nm. The obtained composite nanofibers are amorphous in structure and stable below 220 °C. By adjusting the ratio of Eu(BA)3phen to Tb(BA)3phen complexes, the fluorescence color of composite nanofibers can be tuned from red to yellow, yellow green, and green under the excitation of 276-nm single-wavelength ultraviolet light. Besides, the fluorescence lifetime of Eu3+ ions in composite nanofibers is extended gradually, while that of Tb3+ ions is decreased slowly with increase of Tb(BA)3phen content. The novel color-tunable composite nanofibers have potential applications in the fields of optical devices, color displays and sensor systems.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (NSFC 50972020, 51072026), Specialized Research Fund for the Doctoral Program of Higher Education (20102216110002,20112216120003), the Science and Technology Development Planning Project of Jilin Province (Grant Nos. 20130101001JC, 20070402, 20060504), the Research Project of Science and Technology of Department of Education of Jilin Province “11th 5-years plan” (Grant Nos. 2010JYT01), Key Research Project of Science and Technology of Ministry of Education of China (Grant No. 207026).
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Yang, F., Ma, Q., Dong, X. et al. A novel scheme to obtain tunable fluorescent colors based on electrospun composite nanofibers. J Mater Sci: Mater Electron 26, 336–344 (2015). https://doi.org/10.1007/s10854-014-2405-1
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DOI: https://doi.org/10.1007/s10854-014-2405-1