Origin of the Photoluminescence of Metal Nanoclusters: From Metal-Centered Emission to Ligand-Centered Emission

Yang, Taiqun; Peng, Bo; Shan, Bing-Qian; Zong, Yu-Xin; Jiang, Jingang; Wu, Peng; Zhang, Kun

doi:10.3390/nano10020261

Cited by 174 publications

(169 citation statements)

References 113 publications

(158 reference statements)

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“…1). [34][35][36][37][38][39][40][41][42][43][44][45] Furthermore, because the physical/chemical properties and functions of NCs strongly depend on the number of constituent atoms, if the number of constituent atoms in metal NCs can be controlled, numerous functions can be realized by one metal element. When multiple elements are used in NCs, it is possible to access further various functions.…”

Section: Metal Nanoparticles and Nanoclustersmentioning

confidence: 99%

Controlled colloidal metal nanoparticles and nanoclusters: recent applications as cocatalysts for improving photocatalytic water-splitting activity

et al. 2020

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Section: Metal Nanoparticles and Nanoclustersmentioning

confidence: 99%

Controlled colloidal metal nanoparticles and nanoclusters: recent applications as cocatalysts for improving photocatalytic water-splitting activity

et al. 2020

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“…The fluorescence properties of metal nanoclusters are correlated with the metal cluster, solvent and surface protecting ligands 29 . It is worth to mention that recently, Zhang et co-workers have analysed the origin of the photoluminescence of metal nanoclusters and proposed model based on ligand-assembly-mediated interfacial p band intermediate state (PBIS) 30 . Therefore, ligands are important in the case of metal nanoclusters as they protect them against forming larger non-emitting aggregates and oxidation.…”

Section: Development Of Fluorescence Oligonucleotide Probes Based Onmentioning

confidence: 99%

Development of fluorescence oligonucleotide probes based on cytosine- and guanine-rich sequences

Dembska

Świtalska

Fedoruk-Wyszomirska

2020

Sci Rep

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on DNA. Finally, the obtained solution was further stored in the dark at 4 °C for 2 h to prepare stable DNA-AgNCs. The schematic diagram of the preparation of DNA-AgNCs is presented on Scheme 2. Spectroscopy measurements of fluorescent DNA-AgNCs were performed at 25 °C using 2 µM solutions of a ChONC12 oligonucleotide in 10 mM Tris-CH 3 COOH buffer (pH 7.5) as follows. Absorption spectra of fluorescent DNA-AgNCs. UV-Vis spectra of the DNA-AgNCs were recorded in the spectral range of 200-800 nm by means of Jasco V-750 spectrophotometer (Jasco, Tokyo, Japan). CD spectra of fluorescent DNA-AgNCs. CD measurements were carried out on a Jasco J-820 Spectropolarimeter (Jasco, Tokyo, Japan) with connected a temperature controller (PTC-423L). The CD spectra were obtained by taking the average of three scans in the range of 350-200 nm, with a scan rate of 200 nm/min. Fluorescence spectra. Fluorescence measurements were performed on a Jasco spectrofluorimeter FP-8200 (Jasco, Tokyo, Japan) with 10 nm excitation and 10 nm emission slits and were carried out using 0.4 × 1 cm quartz cuvettes containing 1 ml of solution. Excitation and emission spectra of DNA-AgNCs were recorded in the 200-750 nm range with λ ex = 475 nm/λ em = 560 nm, λ ex = 560 nm/λ em = 610 nm. Sample solution containing 2 μM of fluorescent oligonucleotide in 10 mM Tris-CH 3 COOH buffer (pH 7.5) was equilibrated in a quartz cell at 25 °C for 10 min. Measurements of π-A isotherms and fluorescence spectra at the monolayer interface. To obtain the surface pressure-area (π-A) isotherms for the DODAB (dimethyldioctadecylammonium bromide) monolayer and DODAB/ AgNCs complex at the air-water interface we used the computer-contolled balance system (Langmuir trough small, KSV NIMA, Espoo, Finland) as in Ref. 42. The procedure for creating a monolayer using silver nanoclusters consisted of mixing a DODAB surfactant (5 µL, 1 × 10-3 M in CHCl 3) with a ChONC12 oligonucleotide (5 µL, 1 × 10-3 M in water) (1:1 ratio) and AgNO 3 (6 µl, 1 × 10-2 M in water) and such a mixture was applied to the subphase (after 60 min). At a later stage, freshly prepared NaBH 4 (to reduce Ag + ions) was added behind the barriers. The compression as well as fluorescence measurements of monolayer-silver nanoclusters were carried out analogues as in Ref. 42. Fluorescence emission spectra for ChONC12-AgNCs were recorded in the 400-750 nm range, with the excitation wavelength of 460 nm and 550 nm (λ em = 550 nm/λ em = 610 nm).

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“…The aim of this Special Issue on "Supramolecular Gold Chemistry" was to provide a unique international forum aimed at covering a broad description of results involving the supramolecular chemistry of gold with a special focus on the gold-sulfur interface leading to hybrid materials, ranging from gold-thiolate complexes, [3] to thiolate-protected gold nanoclusters [4][5][6][7][8][9][10][11] and gold-thiolate supramolecular assemblies or nanoparticles. [12][13][14] The role of thiolates on the structure and optical features of gold nanohybrid systems (ranging from plasmonic gold nanoparticles and fluorescent gold nanoclusters to self-assembled Au-containing thiolated coordination polymers) has been highlighted in the review article by Csapó and coworkers [14].…”

mentioning

confidence: 99%

“…However, in such nanosystems, the origin of photoluminescence (PL) is still not fully understood. Zhang and coworkers review some general PL mechanisms, from the pure metal-centered quantum confinement mechanism to the ligand-to-metal charge mechanism, as well as introducing a new paradigm, such as the ligand-centered p band intermediate state model [11]. On the other hand, gold nanoclusters have been proposed as a new, promising class of model catalyst [17].…”

mentioning

confidence: 99%

Supramolecular Gold Chemistry: From Atomically Precise Thiolate-Protected Gold Nanoclusters to Gold-Thiolate Nanostructures

Antoine

2020

Nanomaterials

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Origin of the Photoluminescence of Metal Nanoclusters: From Metal-Centered Emission to Ligand-Centered Emission

Cited by 174 publications

References 113 publications

Controlled colloidal metal nanoparticles and nanoclusters: recent applications as cocatalysts for improving photocatalytic water-splitting activity

Controlled colloidal metal nanoparticles and nanoclusters: recent applications as cocatalysts for improving photocatalytic water-splitting activity

Development of fluorescence oligonucleotide probes based on cytosine- and guanine-rich sequences

Supramolecular Gold Chemistry: From Atomically Precise Thiolate-Protected Gold Nanoclusters to Gold-Thiolate Nanostructures

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