One-pot synthesis of enhanced fluorescent copper nanoclusters encapsulated in metal–organic frameworks

Han, Bingyan; Hu, Xuedong; Yu, Mingbo; Peng, Tingting; Liu, Ying; He, Gaohong

doi:10.1039/c8ra03632b

Cited by 34 publications

(27 citation statements)

References 28 publications

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“…Since different metal ions had different aggregating effects, it was worth wondering whether they were capable of transforming the irregular aggregates into regular nanomaterials here. , A-CuNCs-1 were stable in acid media at room temperature, but they would be completely decomposed after the introduction of strong alkaline such as NaOH. This was similar to the acid-stable and base-soluble behaviors of GSH and dipicolinic acid protected CuNCs. , Although NaOH could be used to dissolve A-CuNCs-1, the increase of NaOH in the colloid also significantly enhanced the pH value after the titration jump point, where the NCs would be completely broken down . Herein, a relatively weak alkaline Na 2 CO 3 was used to disperse the aggregates gently so that the generation of OH – was released by a hydrolysis route.…”

Section: Resultssupporting

confidence: 57%

Engineering the Self-Assembly Induced Emission of Copper Nanoclusters as 3D Nanomaterials with Mesoporous Sphere Structures by the Crosslinking of Ce³⁺

Wang

Cheng

et al. 2018

ACS Omega

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Aggregation-induced emission has provided fluorescence enhancement strategies for metal nanoclusters. However, the morphology of the aggregated nanoclusters tended to be irregular due to the random aggregated route, which would result in the formation of an unstable product. Herein, copper nanoclusters were directly synthesized by using l -cysteine as both the reducing and protection ligand. Initially, the structure of the product was irregular. Furthermore, Ce 3+ was introduced to re-arrange the aggregates through a crosslinking avenue. It was interesting to find that well-ordered three-dimensional nanomaterials with mesoporous sphere structures were obtained after re-aggregation. On the basis of the stability test at a relatively high temperature and the light-emitting diode fabrication investigation, it revealed that the regulated product demonstrated more promising stability and color purity for practical applications than the random aggregated product with irregular structures.

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Section: Resultssupporting

confidence: 57%

Engineering the Self-Assembly Induced Emission of Copper Nanoclusters as 3D Nanomaterials with Mesoporous Sphere Structures by the Crosslinking of Ce³⁺

Wang

Cheng

et al. 2018

ACS Omega

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“…However, the authors showed that while using tetrakis(hydroxymethyl)phosphonium chloride (THPC) as a reducing agent, not only the stability of the dihydrolipoic acid (DHLA)-stabilized cluster increases due to additional interaction with copper core, but also the PL can be tuned from red 110 to bright orange emission 111 depending on the applied reaction conditions. Other ligands such as (3mercaptopropyl)trimethoxysilane, 112 D-penicillamine, [113][114][115] cysteine, [116][117][118][119][120][121][122][123] mercaptobenzoic acid, 124,125 peptides (in particular glutathione (GSH)) 17,18,[126][127][128][129][130][131][132][133][134][135][136][137] and small organic molecules [138][139][140][141][142] were successfully applied as capping agents for the synthesis of luminescent clusters in a typical Brust-Schiffrin method ( Fig. 6).…”

Section: Modified Brust-schiffrin Techniquementioning

confidence: 99%

Copper nanoclusters: designed synthesis, structural diversity, and multiplatform applications

2021

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“…Recently, a simple one-pot synthesis of GSH-CuNC and MOF complexes (CuNCs/MOFs) was reported for the first time (Fig. 4) (Han et al 2018b). GSH-CuNCs were evenly distributed across the whole MOFs structure.…”

Section: Cu•••cu Interantionmentioning

confidence: 99%

Highly fluorescent copper nanoclusters for sensing and bioimaging

Ren

Bick

et al. 2020

Biosensors and Bioelectronics

156

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Metal nanoclusters (NCs), typically consisting of a few to tens of metal atoms, bridge the gap between organometallic compounds and crystalline metal nanoparticles. As their size approaches the Fermi wavelength of electrons, metal NCs exhibit discrete energy levels, which in turn results in the emergence of intriguing physical and chemical (or physicochemical) properties, especially strong fluorescence. In the past few decades, dramatic growth has been witnessed in the development of different types of noble metal NCs (mainly AuNCs and AgNCs). However, compared with noble metals, copper is a relatively earth-abundant and cost-effective metal. Theoretical and experimental studies have shown that copper NCs (CuNCs) possess unique catalytic and photoluminescent properties. In this context, CuNCs are emerging as a new class of nontoxic, economic, and effective phosphors and catalysts, drawing significant interest across the life and medical sciences. To highlight these achievements, this review begins by providing an overview of a multitude of factors that play central roles in the fluorescence of CuNCs. Additionally, a critical perspective of how the aggregation of CuNCs can efficiently improve the florescent stability, tunability, and intensity is also discussed. Following, we present representative applications of CuNCs in detection and bioimaging. Finally, we outline current challenges and our perspective on the development of CuNCs.When decreasing the size of nanoparticles so that it approaches the Fermi wavelength of an electron, novel optical, electrical and magnetic properties appear (Deng et al. 2018a; Li et al. 2016b;Moghadam and Rahaie 2019;Wang et al. 2018c). Commonly termed nanoclusters (NCs), these ultra-small nanoparticles, bridging the missing link between atoms and nanocrystals, have attracted considerable attention in both fundamental research and practical applications (Bagheri et al. 2017;Basu et al. 2019;Sun et al. 2019;Wang et al. 2016b). Benefiting from the great progress in nanosynthetic chemistry, high-quality Copper NCs (CuNCs) with tailored size and good stability can be easily obtained. CuNCs, therefore, constitute an active research direction due to their unique properties, such as high luminous efficiency, long fluorescence lifetime, good optical and chemical stability, and large stokes displacement, which distinguish them as a new type of fluorescent probe for optical sensing and bioimaging/labeling (Cao et al. 2014;Wang et al. 2017).In this review, we highlight recent developments of CuNCs, with a particular emphasis on the multiple factors affecting fluorescent properties of CuNCs, as well as the aggregation-induced emission enhancement (AIEE) effect. To appreciate these advances, applications focused on the detection of ions, macromolecules and bioimaging are summarized. Lastly, we will provide a brief conclusion, and will address future challenges in the rapidly growing field of fluorescent CuNCs. Multiple factors that govern the fluorescence of CuNCsDue to the size of CuNCs falls w...

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One-pot synthesis of enhanced fluorescent copper nanoclusters encapsulated in metal–organic frameworks

Abstract: The encapsulation of Cu nanoclusters (Cu NCs) in metal–organic frameworks (MOFs) would improve the properties of Cu NCs.

Cited by 34 publications

References 28 publications

Engineering the Self-Assembly Induced Emission of Copper Nanoclusters as 3D Nanomaterials with Mesoporous Sphere Structures by the Crosslinking of Ce³⁺

Engineering the Self-Assembly Induced Emission of Copper Nanoclusters as 3D Nanomaterials with Mesoporous Sphere Structures by the Crosslinking of Ce³⁺

Copper nanoclusters: designed synthesis, structural diversity, and multiplatform applications

Highly fluorescent copper nanoclusters for sensing and bioimaging

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One-pot synthesis of enhanced fluorescent copper nanoclusters encapsulated in metal–organic frameworks

Abstract: The encapsulation of Cu nanoclusters (Cu NCs) in metal–organic frameworks (MOFs) would improve the properties of Cu NCs.

Cited by 34 publications

References 28 publications

Engineering the Self-Assembly Induced Emission of Copper Nanoclusters as 3D Nanomaterials with Mesoporous Sphere Structures by the Crosslinking of Ce3+

Engineering the Self-Assembly Induced Emission of Copper Nanoclusters as 3D Nanomaterials with Mesoporous Sphere Structures by the Crosslinking of Ce3+

Copper nanoclusters: designed synthesis, structural diversity, and multiplatform applications

Highly fluorescent copper nanoclusters for sensing and bioimaging

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Product

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Engineering the Self-Assembly Induced Emission of Copper Nanoclusters as 3D Nanomaterials with Mesoporous Sphere Structures by the Crosslinking of Ce³⁺

Engineering the Self-Assembly Induced Emission of Copper Nanoclusters as 3D Nanomaterials with Mesoporous Sphere Structures by the Crosslinking of Ce³⁺