Electrospinning Preparation and Luminescence Properties of Europium Complex/Polymer Composite Fibers
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- 作者：Hui Zhang ; Hongwei Song ; Biao Dong ; Liangliang Han ; Guohui Pan ; Xue Bai ; Libo Fan ; Shaozhe Lu ; Haifeng Zhao ; Fang Wang
- 刊名：Journal of Physical Chemistry C
- 出版年：2008
- 出版时间：June 26, 2008
- 年：2008
- 卷：112
- 期：25
- 页码：9155 - 9162
- 全文大小：587K
- 年卷期：v.112,no.25(June 26, 2008)
- ISSN：1932-7455
文摘
The europium complex Eu(TTA)3(TPPO)2 (TTA = thenoyltrifluoroacetone, TPPO = triphenylphosphine oxide) was incorporated into poly(methyl methacrylate) (PMMA, Mw ≈ 350 000), polystyrene (PS, Mw ≈ 250 000), poly(vinyl pyrrolidone) (PVP, Mw ≈ 1 300 000) matrixes and electrospun into various composite fibers. The thermal stability of these composite fibers is better than that of the pure europium complex. Their photoluminescence properties were studied in comparison to those of the pure complex. The results indicate that, in all of the composite fibers, the excitation bands of the ligands split into different components because of the distorted crystal field, which reduces the degree to which the 5D0−7F0 transition is parity-forbidden. In addition, the thermal stability of the photoluminescence of Eu3+ in the composite fibers is considerably improved over that of the pure complex. Also, the Eu(TTA)3(TPPO)2/PS composite fibers exhibit better photostability upon exposure to ultraviolet light. In the Eu(TTA)3(TPPO)2/PS composite, blue and green band emissions caused by fluorescent impurities appear and, together with the red emissions of Eu3+, produce white light, which might have a potential application in white light-emitting diodes (LEDs).