| 陈萍虹,徐迪,李延斌,高保娇.化学通报,2015,78(6):558-565. |
| 双齿席夫碱配基功能化的聚砜与Eu(Ⅲ)离子所形成的高分子-稀土配合物的制备及其荧光发射特性 |
| Preparation and Fluorescence Emission Characteristics of Polymer-Rare Earth Complexes Constituted by Bidentate Schiff Base Ligand-Functionalized Polysulfone and Eu(Ⅲ) Ion |
| 投稿时间：2014-11-28 修订日期：2015-01-04 |
| DOI： |
| 中文关键词: 聚砜 双齿席夫碱 Eu(Ⅲ)离子 高分子-稀土配合物 敏化作用 |
| 英文关键词:Polysulfone Bidentate Schiff base Eu(Ⅲ) ion Polymer-rare earth complex Sensibilization |
| 基金项目:国家青年科学基金 |
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| 中文摘要: |
| Polysulfone， Bidentate Schiff base， Eu(Ⅲ) ion， Polymer-rare earth complex， Sensibilization
中文摘要：通过分子设计, 经过几步大分子反应, 在聚砜(PSF)侧链键合了双齿席夫碱(SB)配基, 制得了双齿席夫碱配基功能化的聚砜PSF-SB。 在此基础上, 以PSF-SB为大分子配体, 以邻菲咯啉(Phen)为小分子配体, 与Eu(Ⅲ)离子螯合配位, 分别制备了二元高分子-稀土发光配合物PSF-(SB)3-Eu(Ⅲ)与三元高分子-稀土发光配合物PSF-(SB)3-Eu(Ⅲ)-(Phen)1。 采用红外光谱和紫外吸收光谱对配合物进行了表征。研究了配合物的荧光发射性能与发光机理。制备了配合物的固体薄膜, 考察了固体薄膜的荧光发射性能。结果表明, 大分子配基PSF-SB本身具有强的荧光发射, 但与Eu(Ⅲ)离子配位后, 其自身的荧光发射大为减弱, 其与Eu(Ⅲ)离子所形成的二元或三元高分子-稀土配合物,均能发射出很强的Eu(Ⅲ)离子的特征荧光, 即键合在PSF侧链的双齿席夫碱配基能有效地产生分子内能量转移, 强烈地敏化Eu(Ⅲ)离子的荧光发射。 第二配体的协同配位效应与对配位水分子的置换作用使得三元配合物的荧光发射强度高于二元配合物。 |
| 英文摘要: |
| By molecular design, bidentate Schiff base (SB) ligand was bonded on the side of polysulfone (PSF) via several steps of macromolecular reactions, and the bidentate Schiff base ligand-functionalized PSF(PSF-SB), was obtained. On this basis, the binary polymer-rare earth complex PSF-(SB)3-Eu(Ⅲ) and ternary polymer-rare earth complex PSF-(SB)3-Eu(Ⅲ)-(Phen)1 were prepared via the coordination reactions with PSF-SB as macromolecular ligand and 1,10-phenanthroline (Phen) as small molecule ligand, respectively. These complexes were characterized by FTIR and UV absorption spectroscopy. The fluorescence emission characteristics and luminescent mechanism were examined. The solid films of the complexes were also prepared, and the fluorescence emission properties of the films were also investigated. The results showed that the PSF-SB emits strong fluorescence, but after coordinating with Eu(Ⅲ) ion, the fluorescence emission of PSF-SB weakens remarkably. Both the binary and ternary complexes constituted by PSF-SB and Eu(Ⅲ) ion emit strong characteristic fluorescence of Eu(Ⅲ) ion. It indicates that SB bonded on the side chains of PSF can effectively produce the intramolecular energy transfer, and can intensively sensitize the fluorescence emission of Eu(Ⅲ) ion. The fluorescence emission intensity of PSF-(SB)3-Eu(Ⅲ)-(Phen)1 is stronger than that of PSF-(SB)3-Eu(Ⅲ). It associates with that the synergism coordination of the second ligand Phen and its role of replacing the coordinated water molecules around Eu(Ⅲ) ion. |
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