Supramolecular self-assembly enhanced europium(III) luminescence under   visible light

doi:10.1039/c4sm00335g

CORC > 北京大学 > 化学与分子工程学院

	Supramolecular self-assembly enhanced europium(III) luminescence under visible light
	Xu, Limin ; Feng, Liangzhu ; Han, Yuchun ; Jing, Yuyang ; Xian, Zhaoyang ; Liu, Zhuang ; Huang, Jianbin ; Yan, Yun
刊名	软性材料
	2014
关键词	AQUEOUS-SOLUTION COORDINATION POLYMERS TB(2,6-PYRIDINEDICARBOXYLATE)3(3-) LUMINESCENCE RESOLVED RU(1,10-PHENANTHROLINE)3(2+) LANTHANIDE COMPLEXES CROSS-SECTIONS QUANTUM YIELDS PROBES WATER NANOPARTICLES
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.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000337136700012&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Multidisciplinary; Polymer Science; SCI(E); PubMed; 12; ARTICLE; zliu@suda.edu.cn; jbhuang@pku.edu.cn; yunyan@pku.edu.cn; 26; 4686-4693; 10
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/149678]
专题	化学与分子工程学院
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]. 软性材料,2014.
APA	Xu, Limin.,Feng, Liangzhu.,Han, Yuchun.,Jing, Yuyang.,Xian, Zhaoyang.,...&Yan, Yun.(2014).Supramolecular self-assembly enhanced europium(III) luminescence under visible light.软性材料.
MLA	Xu, Limin,et al."Supramolecular self-assembly enhanced europium(III) luminescence under visible light".软性材料 (2014).