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Eu(Ⅲ)与PNIPAM接枝核壳纳米微球相互作用的研究

Study on the Interaction between Eu(Ⅲ) and PNIPAM Grafted

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【Author】 Yin Weiqing1,2,Wang Yanjia2,Li Haiyan1,Zhang Li1,Huang Xiaohua3 (1. Lianyungang Environmental Monitoring Centre,Lianyungang 222001,China)(2. Southern Yangtze University,Wuxi 214036,China) (3. Nanjing Normal University,Nanjing 210097,China)

【机构】连云港市环境监测中心站；江南大学；南京师范大学江苏连云港222001 江南大学；江苏无锡214036；江苏连云港222001；江苏南京210097；

【摘要】利用透射电镜、X射线光电子能谱、动态激光光散射和荧光光谱技术对Eu(Ⅲ)与聚N-异丙基丙烯酰胺(PNIPAM)接枝核壳纳米微球PNIPAM-g-P(NIPAM-co-St)(PNNS)的相互作用进行了研究。结果表明:Eu(Ⅲ)和热敏性的核壳纳米微球PNNS有显著的相互作用。其一,Eu(Ⅲ)可与PNNS中酰胺基团上的氧原子配位形成微球配合物Eu(Ⅲ)-PNNS;其二,Eu(Ⅲ)-PNNS微球配合物兼具热敏性;其三,该配合物在614nm处的荧光强度较Eu(Ⅲ)增大了33倍,Eu(Ⅲ)与PNNS之间能量传递达到55%。更多还原

【Abstract】 The interaction between PNIPAM-g-P(NIPAM-co-St) (PNNS)and Eu(Ⅲ) core-shell nanoparticles was characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), dynamic light scattering (DLS) and fluorescence spectroscopy. It was found that there is a strong interaction between Eu(Ⅲ) and PNNS core-shell nanoparticles. Firstly, Eu(Ⅲ) mainly bonded to O of the carbonyl groups of PNNS to form the complex of Eu(Ⅲ)-PNNS. Secondly, the Eu(Ⅲ)-PNNS complex had the temperature responsive property. Thirdly, the maximum emission intensity of the complex at 614 nm was enhanced by about 33 times compared to that of the pure Eu(Ⅲ) . The intramolecular energy transfer efficiency from PNNS to Eu(Ⅲ) reached 55%.更多还原

【关键词】聚N-异丙基丙烯酰胺； Eu(Ⅲ)；低临界溶解温度； XPS；能量传递；
【Key words】 Poly(N-isopropylacrylamide)； terbium； lower critical solution temperature； XPS； energy transfer；

【基金】国家自然科学基金(20471030);江苏省高新技术项目(BG2005040)资助

【文献出处】稀有金属快报 ,Rare Metals Letters , 编辑部邮箱 ,2006年09期

【分类号】O631.3
【被引频次】5
【下载频次】119

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