Organic-inorganic interface-induced multi-fluorescence of MgO nanocrystal clusters and their applications in cellular imaging

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	Organic-inorganic interface-induced multi-fluorescence of MgO nanocrystal clusters and their applications in cellular imaging
	Xie, Shuifen ; Bao, Shixiong ; Ouyang, Junjie ; Zhou, Xi ; Kuang, Qin ; Xie, Zhaoxiong ; Zheng, Lansun ; Zhou X(周樨) ; Kuang Q(匡勤) ; Xie ZX(谢兆雄) ; Zheng LS(郑兰荪)
刊名	http://dx.doi.org/10.1002/chem.201303927
	2014
关键词	Biocompatibility Carboxylation Carboxylic acids Dissolution Energy transfer Fluorescence Ligands Nanocrystals Nanostructured materials Nanostructures Silica Ultraviolet visible spectroscopy
英文摘要	Surface functionalization of inorganic nanomaterials through chemical binding of organic ligands on the surface unsaturated atoms, forming unique organic-inorganic interfaces, is a powerful approach for creating special functions for inorganic nanomaterials. Herein, we report the synthesis of hierarchical MgO nanocrystal clusters (NCs) with an organic-inorganic interface induced multi-fluorescence and their application as new alternative labels for cellular imaging. The synthetic method was established by a dissolution and regrowth process with the assistance of carboxylic acid, in which the as-prepared MgO NCs were modified with carboxylic groups at the coordinatively unsaturated atoms of the surface. By introducing acetic acid to partially replace oleic acid in the reaction, the optical absorption of the produced MgO NCs was progressively engineered from the UV to the visible region. Importantly, with wider and continuous absorption profile, those MgO NCs presented bright and tunable multicolor emissions from blue-violet to green and yellow, with the highest absolute quantum yield up to (33±1) %. The overlap for the energy levels of the inorganic-organic interface and low-coordinated states stimulated a unique fluorescence resonance energy transfer phenomenon. Considering the potential application in cellular imaging, such multi-fluorescent MgO NCs were further encapsulated with a silica shell to improve the water solubility and stability. As expected, the as-formed MgO@SiO2 NCs possessed great biocompatibility and high performance in cellular imaging. Colorful clusters: Carboxylate-modified MgO nanocrystal clusters (NCs) with tunable multicolor emissions from blue-violet to green and yellow were fabricated by a dissolution and regrowth process with the assistance of carboxylic acid groups. Excitingly, such multi-fluorescent MgO NCs, after encapsulation with a silica shell, possessed great biocompatibility, and high performance in cellular imaging (see figure). ? 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
语种	英语
出版者	WILEY-V C H VERLAG GMBH
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/87463]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	Xie, Shuifen,Bao, Shixiong,Ouyang, Junjie,et al. Organic-inorganic interface-induced multi-fluorescence of MgO nanocrystal clusters and their applications in cellular imaging[J]. http://dx.doi.org/10.1002/chem.201303927,2014.
APA	Xie, Shuifen.,Bao, Shixiong.,Ouyang, Junjie.,Zhou, Xi.,Kuang, Qin.,...&郑兰荪.(2014).Organic-inorganic interface-induced multi-fluorescence of MgO nanocrystal clusters and their applications in cellular imaging.http://dx.doi.org/10.1002/chem.201303927.
MLA	Xie, Shuifen,et al."Organic-inorganic interface-induced multi-fluorescence of MgO nanocrystal clusters and their applications in cellular imaging".http://dx.doi.org/10.1002/chem.201303927 (2014).