Synthesis, optical properties and applications of ultra-small luminescent gold nanoclusters

Cui, Ma-Lin; Zhao, Yuan; Song, Qijun

doi:10.1016/j.trac.2014.02.005

Cited by 169 publications

(115 citation statements)

References 125 publications

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“…At 25°C, photoluminescence reaches a saturation after eight hours of incubation. As the temperature increases, rapid formation of (AuCys)n β can be 1 Investigation of the samples via time-resolved SAXS for longer time periods at high temperatures is problematic due to the fragilty of the borosilicate capillaries. observed, and higher intensity values can be achieved.…”

Section: (B)mentioning

confidence: 99%

“…A family of luminescent gold assemblies, commonly referred as Gold Quantum Clusters (GQCs), has recently gained serious attention [1][2][3][4]. In order to achieve stable, biocompatible products with a hydrophilic character, biomolecules such as peptides and proteins are often used as reducing agents and stabilizing ligands in gold quantum cluster preparation methods.…”

Section: Introductionmentioning

confidence: 99%

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The supramolecular chemistry of gold and l -cysteine: Formation of photoluminescent, orange-emitting assemblies with multilayer structure

Söptei

Mihály

Szigyártó

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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The protein mediated approach is a common method for the synthesis of photoluminescent gold quantum clusters (GQCs), where proteins, acting as reducing and stabilizing agents, react with gold salts through cysteine residues. For the better understanding of the phenomenon, the aqueous phase reaction of HAuCl4 and L-cysteine has been investigated at the supramolecular level by various experimental techniques and molecular mechanics simulations. We have observed the formation of a novel photoluminescent product, (AuCys)n β , which shows emission in the orange region of the spectrum. Small-and wide-angle X-ray scattering (SWAXS) measurements have revealed the presence of nanosized lamellae, which have an internal multilayer superlattice structure with a characteristic periodic distance of 1.3 nm. Based on the results, the layers are built up by zigzag shaped (AuCys)n polymer chains connected through aurophilic bonds. The aurophilic network is stabilized via salt bridges and hydrogen bonds, which are also responsible for the interlayer interactions. Here, the evolution of the multilayer structure has been monitored by the combined application of photoluminescence spectroscopy and time-resolved SAXS. It has been concluded that there is a strong correlation between the emission and the scattering intensity, which suggests that the two-and three-dimensional aggregation of the building blocks to form sheets and multilayers are simultaneous processes. Furthermore, we have revealed that the formation and behavior of (AuCys)n β show significant differences to that of Au-L-glutathione compounds desrcibed earlier despite the similarity of L-cysteine and L-glutathione. These results evidence that L-cysteine and gold species form building blocks that can be applied expansively in supramolecular and cluster chemistry.

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Section: (B)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The supramolecular chemistry of gold and l -cysteine: Formation of photoluminescent, orange-emitting assemblies with multilayer structure

Söptei

Mihály

Szigyártó

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…Phosphate-containing metabolites play a key role in biological systems [78]. Due to the effective electron transfer between the GSH-bound AuNCs and Fe 3?…”

Section: Detection Of Inorganic Anionsmentioning

confidence: 99%

Fluorescent Gold Nanoclusters: Promising Fluorescent Probes for Sensors and Bioimaging

Wang

Zhu

2017

J. Anal. Test.

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Fluorescent gold nanoclusters (AuNCs) have recently emerged as a novel kind of promising fluorescent probes for high-performance sensors and bioimaging because of their ultrasmall size (\3 nm), strong luminescence, good photostability, and excellent biocompatibility. Over the past decade, we have witnessed growing popularity of AuNCs in analytical applications and enormous efforts have been devoted to their development. In this review, we provide an update on recent advances in the development of AuNCs in terms of physicochemical properties, synthesis strategies, and bioapplications. The optical, electrochemical, catalytical, and solvatochromic properties of AuNCs are first summarized, which are followed by different ligands or template-assisted controllable synthetic methods. Afterwards functionalization of AuNCs is described in terms of ligand exchange, bioconjugation, and noncovalent interaction. We then focus on the applications of AuNCs as fluorescent probes for detection of metal ions, inorganic anions, small biomolecules, proteins, nucleic acids, drug molecules, pH, and temperature. We also summarize the usage of metal NCs in cellular and in vivo targeting and imaging. Finally, we conclude with a brief look at the future challenges and prospects of the development of AuNCs.

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“…With the rapid development of metal NCs, the synthesis, optical properties and fluorescent applications of metal NCs have been reviewed [5,[47][48][49][50]. Thus, the purpose of this review is to summarize and highlight the recent works on metal NCs used in CL and ECL application, with a focus on the roles of the different metal NCs in CL and ECL reaction and their new analytical applications.…”

Section: Introductionmentioning

confidence: 99%

Chemiluminescence and electrochemiluminescence applications of metal nanoclusters

Han

Zhang

et al. 2016

Sci. China Chem.

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Due to strong photoluminescence, extraordinary photostability, excellent biocompatibility, and good water-solubility, metal nanoclusters have attracted enormous attention since discovered. They are found to be novel fluorescence labels for biological applications and environmental monitoring. Recently the chemiluminescence (CL) or electrochemiluminescence (ECL) of metal nanoclusters has received increasing attention. This review covers recent vibrant developments in this field of the past 5 years, and highlights different functions of metal nanoclusters in various CL and ECL systems, such as luminophores, catalysts, and quenchers. Latest synthetic methods of metal nanoclusters used in CL or ECL are also summarized. Furthermore, we discuss some perspectives and critical challenges of this field in the near future. nanoclusters, chemiluminescence, electrochemiluminescence, fluorescence, sensors Citation:Han S, Zhang Z, Li S, Qi L, Xu G. Chemiluminescence and electrochemiluminescence applications of metal nanoclusters. Sci China Chem,

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Synthesis, optical properties and applications of ultra-small luminescent gold nanoclusters

Cited by 169 publications

References 125 publications

The supramolecular chemistry of gold and l -cysteine: Formation of photoluminescent, orange-emitting assemblies with multilayer structure

The supramolecular chemistry of gold and l -cysteine: Formation of photoluminescent, orange-emitting assemblies with multilayer structure

Fluorescent Gold Nanoclusters: Promising Fluorescent Probes for Sensors and Bioimaging

Chemiluminescence and electrochemiluminescence applications of metal nanoclusters

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