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Highly Fluorescent Gold Cluster Assembly

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Title
Highly Fluorescent Gold Cluster Assembly
Author(s)
Hogeun Chang; Niladri S. Karan; Kwangsoo Shin; Megalamane. S. Bootharaju; Nah, Sanghee; Sue In Chae; Woonhyuk Baek; Sanghwa Lee; Junhee Kim; Young Ju Son; Taegyu Kang; Giho Ko; Kwon, Seung-Hae; Taeghwan Hyeon
Publication Date
2021-01
Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.143, no.1, pp.326 - 334
Publisher
AMER CHEMICAL SOC
Abstract
The photoluminescence (PL) of metal nanoclusters (NCs), originating from their molecule-like electronic structure, is one of the most intriguing properties of NCs. Although various strategies such as tailoring the size, structure, and chemical environment of NCs have shown to improve the PL, their quantum yields (QYs) are still lagging far behind those of conventional luminescent materials, including quantum dots and organic fluorophores. Herein, we report the synthesis of highly luminescent gold cluster assembly (GCA) from Zn2+-tion-mediated assembly of Au-4 (SRCOO-)(4) clusters using mercaptocarboxylic acid as a protective ligand and reductant as well as a growth suppressor. The synergetic combination of unique aurophilic interactions among Au(4)clusters and the rigidified chemical environment induced by metal ion chelation through carboxylate groups is responsible for the ultrabright greenish-blue fluorescence with a QY up to 90%. Furthermore, the unique flexibility of dis/reassembly and the aggregation-dependent strong fluorescence of GCA offer a great potential for applications in biodegradable and trackable drug delivery systems.
URI
https://pr.ibs.re.kr/handle/8788114/9872
DOI
10.1021/jacs.0c10907
ISSN
0002-7863
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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