首页|Biomimetic crystallization for long-pursued-COOH-functionalized gold nanocluster with near-infrared phosphorescence

Biomimetic crystallization for long-pursued-COOH-functionalized gold nanocluster with near-infrared phosphorescence

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As an interdisciplinary product,water-soluble gold nanoclusters(AuNCs)stabilized by ligands containing carboxyl(-COOH)group have garnered significant attention from synthetic chemists and biologists due to their immense potential for biomedical applications.However,revealing the crystallographic struc-tures of-COOH-functionalized AuNCs remains a bottleneck.Herein,we successfully applied the salting-out method to obtain a series of high-quality single crystals of-COOH-functionalized Au25 nan-oclusters and revealed their crystallographic structures.Particularly,K3Au25(2-Hmna)9(mna)6]-(Au25a)protected by 2-mercaptonicotinic acid features an unprecedented tetrameric Au4(SRS)3(SRS,N)2 staple motifs surrounding the icosahedral Au13 kernel,breaking the traditional perception on the structure of Au25(SR)18.Au25a exhibits a distinct near-infrared emission at 970 nm with long lifetime of 8690 ns,which have been studied by transient absorption spectroscopy and time-dependent density functional theory.This work compensates for the research gap in the experimental structure of-COOH-functionalized AuNCs and opens up a new avenue to explore their structure-property correlations.

Water-soluble gold nanoclustersNear-infrared phosphorescenceSalting-out method

Wei-Dong Tian、Wei-Dan Si、Shana Havenridge、Chengkai Zhang、Zhi Wang、Christine M.Aikens、Chen-Ho Tung、Di Sun

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School of Chemistry and Chemical Engineering,State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,China

Department of Chemistry,Kansas State University,Manhattan KS 66506,USA

Analytical Center for Structural Constituent and Physical Property of Core Facilities Sharing Platform,Shandong University fAnalytical Center for Structural Constituent and Physical Property of Core Facilities Sharing Platform,Shandong University fNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFok Ying Tong Education FoundationNatural Science Foundation of Shandong ProvinceNatural Science Foundation of Shandong ProvinceNatural Science Foundation of Shandong ProvinceNatural Science Foundation of Shandong ProvinceTaishan Scholar Project of Shandong Province of ChinaTaishan Scholar Project of Shandong Province of ChinaNational Postdoctoral Innovative Talents Support ProgramChina Postdoctoral Science Foundation

TAs2104573S22201159221711642232510552261135637171009ZR2019ZD45ZR2020ZD35JQ201803ZR2017MB061tsqn201812003ts20190908BX20211712021M700081

2024

10.1016/j.scib.2023.11.014

科学通报(英文版)
中国科学院

科学通报(英文版)

CSTPCD
ISSN：1001-6538
年,卷(期)：2024.69(1)
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