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
Citations
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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
A luminescent gold(I)–copper(I) cluster with unprecedented carbon-centered trigonal prismatic hexagold
TL;DR: An unprecedented trigonal prismatic (μ(6)-C)Au(6) structure has been found in a novel gold(I)-copper(I) cluster with a hypercoordinated carbon and the incorporation of copper ions enhances the rigidity and integrity of the cluster and turns on the bright red solution luminescence.
Journal ArticleDOI
The Origin of the Photoluminescence Enhancement of Gold-Doped Silver Nanoclusters: The Importance of Relativistic Effects and Heteronuclear Gold-Silver Bonds
TL;DR: Computationally explored the geometric and electronic structures of Ag29 and gold-doped Ag29-x Aux (x=1-5) nanoclusters in the S0 and S1 states and found thatrelativistic effects that are mainly due to the Au atoms play an important role in enhancing the fluorescence intensity, especially for highly doped Ag26 Au3, Ag25 Au4, and Ag24 Au5.
Journal ArticleDOI
Effects of single atom doping on the ultrafast electron dynamics of M1Au24(SR)18 (M = Pd, Pt) nanoclusters.
TL;DR: It is demonstrated that a single foreign atom can lead to entirely different excited state spectral features of the whole cluster compared to the parent Au25(SR)18 cluster, and help further understand their properties and benefit the development of energy-related applications.
Journal ArticleDOI
Rational design of red AIEgens with a new core structure from non-emissive heteroaromatics.
Ming Chen,Xianglong Hu,Xianglong Hu,Junkai Liu,Baixue Li,Nelson L. C. Leung,Lucia Viglianti,Tsz Shing Cheung,Herman H. Y. Sung,Ryan T. K. Kwok,Ian D. Williams,Anjun Qin,Jacky W. Y. Lam,Ben Zhong Tang,Ben Zhong Tang +14 more
TL;DR: This work provides a new strategy to design heterocycle-containing AIEgens from non-emissive heteroaromatics and promotes their applications for long-term lysosome imaging.
Journal ArticleDOI
A “turn-on” silver nanocluster based fluorescent sensor for folate receptor detection and cancer cell imaging under visual analysis
Hong Jiang,Gang Xu,Yimin Sun,Weiwei Zheng,Xiangxiang Zhu,Baojuan Wang,Xiaojun Zhang,Guangfeng Wang,Guangfeng Wang +8 more
TL;DR: A novel terminal protection based label-free and "turn-on" fluorescent sensor for detection of folate receptors (FRs) and HeLa cells is developed by fluorescence resonance energy transfer (FRET) between single-walled carbon nanotubes and silver nanoclusters.