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Remarkable water-soluble ZnO nanocrystals: from ‘click’ functionalization to a supramolecular aggregation enhanced emission phenomenon†
Materials Chemistry Frontiers ( IF 7 ) Pub Date : 2018-04-04 00:00:00 , DOI: 10.1039/c7qm00586e
Agnieszka Grala 1, 2, 3, 4 , Małgorzata Wolska-Pietkiewicz 4, 5, 6, 7 , Zbigniew Wróbel 1, 2, 3, 4 , Tomasz Ratajczyk 1, 2, 3, 4 , Joanna Kuncewicz 4, 5, 8, 9 , Janusz Lewiński 1, 2, 3, 4, 5
Affiliation  

The preparation of ZnO nanocrystals with enhanced stability and photoluminescence intensity in an aqueous environment is a challenging task. We report on an one-pot two-step organometallic approach for the synthesis of processable alkyne-functionalized quantum-sized ZnO crystals and their efficient phase transfer protocol from an organic solvent to an aqueous environment involving the surface modification by the Cu-mediated azide–alkyne cycloaddition. Remarkably, the water-soluble NCs not only maintain the photoluminescence properties after the post-synthetic surface modification, but also exhibit the unprecedented (for II–VI semiconductor nanocrystals) aggregation enhanced emission phenomenon.

中文翻译:

杰出的水溶性ZnO纳米晶体:从“点击”功能化到超分子聚集增强的发射现象

在水性环境中制备具有增强的稳定性和光致发光强度的ZnO纳米晶体是一项艰巨的任务。我们报告了一种一锅两步的有机金属方法,用于合成可加工的炔烃官能化的量子尺寸ZnO晶体,以及它们从有机溶剂到水环境的有效相转移协议,涉及通过铜介导的叠氮化物进行表面改性–炔烃环加成。值得注意的是,水溶性NC不仅在合成后表面改性后保持光致发光特性,而且还表现出前所未有的(对于II-VI半导体纳米晶体而言)聚集增强的发射现象。
更新日期:2018-04-04
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