Supramolecular self-assembly enhanced europium(III) luminescence under visible light
文献类型：期刊论文
| 作者 | Xu, Limin1; Feng, Liangzhu2; Han, Yuchun3; Jing, Yuyang1; Xian, Zhaoyang1; Liu, Zhuang2; Huang, Jianbin1; Yan, Yun1 |
| 刊名 | SOFT MATTER
 |
| 出版日期 | 2014 |
| 卷号 | 10期号:26页码:4686-4693 |
| ISSN号 | 1744-683X |
| DOI | 10.1039/c4sm00335g |
| 英文摘要 | In this paper, we report on the luminescence of europium by directly exciting europiumions with visible light in aqueous medium. Upon replacing all the water molecules that coordinate around a central europium ion with a ditopic ligand 1,11-bis(2,6-dicarboxypyridin-4-yloxy)-3,6,9-trioxaundecane (L2EO4), the quenching from water molecules is efficiently eliminated, offering considerable europium emission. By stoichiometrically mixing with a positively charged block polyelectrolyte, the negatively charged L2EO4-Eu coordinating complex can be transformed into a coordination 'polymer', which simultaneously forms electrostatic micelles with further enhanced europium fluorescence emission, owing to the increased fraction of L2EO4-coordinated Eu(III) as revealed by the fluorescence lifetime measurements. This approach avoids the use of the antenna effect that often utilizes UV light as the irradiation source. We further use those micelles for bio-imaging, and for the first time demonstrate the use of directly excited Eu-containing nano-probes for in vivo fluorescence imaging in small animals under visible excitation. Although literature results have shown that the direct excitation of europium ions in water may lead to emissions in the presence of coordinating ligands, those emissions were too weak to be applied due to the remaining water molecules in the coordination sphere. Our work points out that the direct excitation of europium can generate considerable europium emission given that all the water molecules in the coordination sphere are excluded, which does not only greatly reduce tedious lab work in synthesizing antenna molecules, but also facilitates the application of europium in aqueous medium under visible light. |
| 语种 | 英语 |
| 出版者 | ROYAL SOC CHEMISTRY |
| WOS记录号 | WOS:000337136700012 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/52697]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Liu, Zhuang |
| 作者单位 | 1.Peking Univ, Coll Chem & Mol Engn, State Key Lab Struct Chem Unstable & Stable Speci, BNLMS, Beijing 100871, Peoples R China 2.Soochow Univ, Inst Funct Nano & So Mat, Suzhou 215123, Jiangsu, Peoples R China 3.Chinese Acad Sci, Inst Chem, BNLMS, Key Lab Colloid & Interface Sci, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Limin,Feng, Liangzhu,Han, Yuchun,et al. Supramolecular self-assembly enhanced europium(III) luminescence under visible light[J]. SOFT MATTER,2014,10(26):4686-4693. |
| APA | Xu, Limin.,Feng, Liangzhu.,Han, Yuchun.,Jing, Yuyang.,Xian, Zhaoyang.,...&Yan, Yun.(2014).Supramolecular self-assembly enhanced europium(III) luminescence under visible light.SOFT MATTER,10(26),4686-4693. |
| MLA | Xu, Limin,et al."Supramolecular self-assembly enhanced europium(III) luminescence under visible light".SOFT MATTER 10.26(2014):4686-4693. |
入库方式： OAI收割
来源：化学研究所
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