Journal ArticleDOI
Tailoring the photoluminescence of atomically precise nanoclusters.
Xi Kang,Manzhou Zhu +1 more
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TLDR
Promising applications of metal nanoclusters are reviewed, with particular focus on their potential to impact the fields of chemical sensing, bio-imaging, and bio-labeling, and scope for improvements and future perspectives of these novel nanomaterials are highlighted.Abstract:
Due to their atomically precise structures and intriguing chemical/physical properties, metal nanoclusters are an emerging class of modular nanomaterials. Photo-luminescence (PL) is one of their most fascinating properties, due to the plethora of promising PL-based applications, such as chemical sensing, bio-imaging, cell labeling, phototherapy, drug delivery, and so on. However, the PL of most current nanoclusters is still unsatisfactory-the PL quantum yield (QY) is relatively low (generally lower than 20%), the emission lifetimes are generally in the nanosecond range, and the emitted color is always red (emission wavelengths of above 630 nm). To address these shortcomings, several strategies have been adopted, and are reviewed herein: capped-ligand engineering, metallic kernel alloying, aggregation-induced emission, self-assembly of nanocluster building blocks into cluster-based networks, and adjustments on external environment factors. We further review promising applications of these fluorescent nanoclusters, with particular focus on their potential to impact the fields of chemical sensing, bio-imaging, and bio-labeling. Finally, scope for improvements and future perspectives of these novel nanomaterials are highlighted as well. Our intended audience is the broader scientific community interested in the fluorescence of metal nanoclusters, and our review hopefully opens up new horizons for these scientists to manipulate PL properties of nanoclusters. This review is based on publications available up to December 2018.read more
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Journal ArticleDOI
Atomically precise alloy nanoclusters: syntheses, structures, and properties.
TL;DR: This review provides a comprehensive synthetic toolbox and controllable doping modes so as to achieve more alloy nanoclusters with customized compositions, structures, and properties for applications.
Journal ArticleDOI
AIE Triggers the Circularly Polarized Luminescence of Atomically Precise Enantiomeric Copper(I) Alkynyl Clusters
Miao-Miao Zhang,Xi-Yan Dong,Zhao-Yang Wang,Hai-Yang Li,Shi-Jun Li,Xueli Zhao,Shuang-Quan Zang +6 more
TL;DR: This paper designed a pair of chiral alkynyl ligands, (R/S)-2-diphenyl-2-hydroxylmethylpyrrolidine-1-propyne (abbreviated as R/S-DPM), and for the first time, successfully prepared and characterized single crystals of optically pure enantiomeric pair of atomically-precise copper(I) clusters.
Journal ArticleDOI
Ultrastable atomically precise chiral silver clusters with more than 95% quantum efficiency
Zhen Han,Xi-Yan Dong,Peng Luo,Si Li,Zhao-Yang Wang,Shuang-Quan Zang,Thomas C. W. Mak,Thomas C. W. Mak +7 more
TL;DR: Enantiomers of an octahedral Ag6 cluster prepared via one-step synthesis using designed chiral ligands at ambient temperature are reported, revealing that thermally activated delayed fluorescence is responsible for the high PLQY, which combines chirality in excited states to generate strong circularly polarized luminescence.
Journal ArticleDOI
Endohedrally Doped Cage Clusters
TL;DR: This comprehensive review presents results of many such developments in this fast-growing field including endohedrally doped Al, Ga, and In clusters, and performs ab initio calculations to present updated results of the most stable atomic structures and fundamental electronic properties of the endohedral doped cage clusters.
Journal ArticleDOI
A New Class of NIR-II Gold Nanocluster-Based Protein Biolabels for In Vivo Tumor-Targeted Imaging.
Xiaorong Song,Xiaorong Song,Wei Zhu,Xiaoguang Ge,Renfu Li,Shihua Li,Xian Chen,Jibin Song,Jianping Xie,Xueyuan Chen,Xueyuan Chen,Huanghao Yang,Huanghao Yang +12 more
TL;DR: The renal-clearable and host-guest recognition-based NIR-II biolabels developed in this study provide a promising platform to monitor the physiological behaviors of biomolecules in living organisms.
References
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Journal ArticleDOI
Molecular ``surgery'' on a 23-gold-atom nanoparticle
Qi Li,Tian-Yi Luo,Michael G. Taylor,Shuxin Wang,Xiaofan Zhu,Yongbo Song,Giannis Mpourmpakis,Nathaniel L. Rosi,Rongchao Jin +8 more
TL;DR: A site-specific “surgery” on the surface motif of an atomically precise 23-gold-atom [Au23(SR)16]− nanoparticle is demonstrated by a two-step metal-exchange method, which leads to the “resection” of two surface gold atoms and the formation of a new 21- gold-atom nanoparticle, without changing the other parts of the starting nanoparticle structure.
Journal ArticleDOI
Racemization of a chiral nanoparticle evidences the flexibility of the gold-thiolate interface.
TL;DR: This is the first study on racemization of an intrinsically chiral gold nanocluster, Au38(SCH2CH2Ph)24, which goes along with a drastic rearrangement of its surface involving place exchange of several thiolates.
Journal ArticleDOI
Thiacalix[4]arene: New protection for metal nanoclusters
Zong-Jie Guan,Jiu-Lian Zeng,Zi-Ang Nan,Xian-Kai Wan,Yu-Mei Lin,Quan-Ming Wang,Quan-Ming Wang +6 more
TL;DR: Thiacalix[4]arene has been used in the synthesis of a silver nanocluster, the first structurally determined calixarene-protected metal nanoclusters, and suggests a bright future for metal Nanoclusters protected by macrocyclic ligands.
Journal ArticleDOI
Redox-Active AIEgen-Derived Plasmonic and Fluorescent Core@Shell Nanoparticles for Multimodality Bioimaging
Xuewen He,Zheng Zhao,Ling-Hong Xiong,Ling-Hong Xiong,Peng Fei Gao,Peng Fei Gao,Chen Peng,Chen Peng,Rong Sheng Li,Yu Xiong,Zhi Li,Herman H. Y. Sung,Ian D. Williams,Ryan T. K. Kwok,Jacky Wing Yip Lam,Cheng Zhi Huang,Nan Ma,Ben Zhong Tang,Ben Zhong Tang +18 more
TL;DR: A new type of silver@AIEgen (aggregation-induced emission luminogen) core-shell nanoparticle (AACSN) with both strong aggregated-state fluorescence of the AIEgen and distinctive plasmonic scattering of silver nanoparticles for multimodality imaging in living cells and small animals is reported.
Journal ArticleDOI
Recent Advances in the Synthesis and Applications of Ultrasmall Bimetallic Nanoclusters
TL;DR: In this paper, the authors survey current progress in the synthesis of bi-MNCs, especially for those NCs with good control of cluster size and composition, followed by a detailed discussion on some unique physicochemical properties.