Roles of thiolate ligands in the synthesis, properties and catalytic application of gold nanoclusters

Nasaruddin, Ricca Rahman; Chen, Tiankai; Yan, Ning; Xie, Jianping

doi:10.1016/j.ccr.2018.04.016

Cited by 225 publications

(186 citation statements)

References 308 publications

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“…Electrospray ionization mass spectra (ESI-MS) showed true mono-dispersity of the three clusters,c onfirming the exact formulas:[ Au 9 (PPh 3 ) 8 ] 3+ ,[ Au 11 (PPh 3 ) 8 Cl 2 ] + ,a nd Au 36 -(TBBT) 24 .A ss hown in Figure 1a,p eaks at 3208. 12 (Figure 1d). [35] [Au 11 (PPh 3 ) 8 Cl 2 ] + can be viewed as an incomplete icosahedron with an approximate C 3v symmetry.…”

Section: Resultsmentioning

confidence: 99%

“…[8] With the evolution of electronic structures from metallic to non-metallic state,these clusters can reveal ahidden mystery in the catalytic field:t he non-metallic cluster-catalysts may have similar or even superior catalytic abilities compared to the metallic ones.More than that, they are opening up anew era for catalytic science.F or example,t hese clusters provide exciting opportunities to map out the explicit structure-property relationship and allow for identification of active sites with atomic precision. [9][10][11][12][13][14][15] Specifically,they can be used to explore how the catalytic performance can be tailored by only one atom alteration. [16,17] They can also circumvent the sluggish kinetics of electron transfer for non-photosynthetic bacteria to enable photosynthesis of acetic acid from CO 2 .…”

Section: Introductionmentioning

confidence: 99%

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Controllable Conversion of CO₂on Non‐Metallic Gold Clusters

et al. 2019

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Gold nanoparticles in metallic or plasmonic state have been widely used to catalyze homogeneous and heterogeneous reactions.H owever,t he catalytic behavior of gold catalysts in non-metallic or excitonic state remain elusive. Atomically precise Au n clusters (n = number of gold atoms) bridge the gap between non-metallic and metallic catalysts and offer new opportunities for unveiling the hidden properties of gold catalysts in the metallic,t ransition regime,a nd nonmetallic states.H ere,w er eport the controllable conversion of CO 2 over three non-metallic Au n clusters,including Au 9 ,Au 11 , and Au 36 ,towards different target products:methane produced on Au 9 ,e thanol on Au 11 ,a nd formic acid on Au 36 .S tructural information encoded in the non-metallic clusters permits aprecise correlation of atomic structure with catalytic properties and hence,p rovides molecular-level insight into distinct reaction channels of CO 2 hydrogenation over the three nonmetallic Au catalysts.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Controllable Conversion of CO₂on Non‐Metallic Gold Clusters

et al. 2019

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“…H − ions arising from BH 4 − has stronger affinity by the metal surface than most ligands, even those considered strong, like thiols. This replacement of adsorbates by hydride ions has also been proved for metal clusters of very small size ,. Hence, in presence of NaBH 4 , ligands on the surface of metal NPs can be re‐organized or even completely desorbed, conducting to a change in the expected catalytic activity.…”

Section: Resultsmentioning

confidence: 80%

The Effect of Poly(vinylpyrrolidone) (PVP) on the Au Catalyzed Reduction of p–nitrophenol: The Fundamental Role of NaBH₄.

et al. 2019

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The effect of polymeric ligands, like poly(vinylpyrrolidone) (PVP), on the reduction of p‐nitrophenol by NaBH4 in presence of gold nanoparticles (NPs) is systematically investigated. Distinctive trends could be identified depending on the extent of the NaBH4 excess. At rather low NaBH4 concentration excess, PVP had a deleterious effect, probably due to the steric hindrance of the PVP layer on the gold surface that acted partially blocking gold active sites. However, under a large excess of NaBH4, an enhanced catalytic performance was observed, what was attributed to the exchange of the polymer by hydride anions and other ions formed during hydrolysis of NaBH4. This exchange occurred without aggregation of NPs and without compromising recycling capability. Based on these results, the design of new routes for the synthesis of supported catalysts based on PVP stabilized metal colloids can be envisaged, as no additional steps would be necessary for removing the stabilizer prior to use.

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“…Generally speaking, as prepared AuNCs in organic or aqueous phase always possess certain size distributions, and each nanocluster may have a different number of protective ligands . These differences probably unable precise investigation the physical and chemical properties of AuNCs or expanding their applications.…”

Section: Introductionmentioning

confidence: 99%

Size‐dependent electrophoretic migration and separation of water‐soluble gold nanoclusters by capillary electrophoresis

et al. 2019

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Recently, water‐soluble gold nanoclusters (AuNCs) have attracted more and more attention due to their unique properties. In this study, penicillamine‐protected gold nanoclusters (Pen‐AuNCs) were synthesized and initially fractionated by sequential size‐selective precipitation (SSSP). The crude Pen‐AuNCs and SSSP fractions were separated by capillary zone electrophoresis (CZE) with a diode array detector. The effects of key parameters, including the concentration of phosphate buffer, pH value and the ethanol content were systematically investigated. The separation of water‐soluble poly‐disperse AuNCs were well achieved at 30 mM phosphate buffer with 7.5% EtOH, pH 12.0, and applied voltage of 15 kV. The linear correlation between AuNCs diameter and mobility was observed. This finding provides an important reference for CE separation and product purification of water‐soluble AuNCs or other nanomaterials.

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Roles of thiolate ligands in the synthesis, properties and catalytic application of gold nanoclusters

Cited by 225 publications

References 308 publications

Controllable Conversion of CO₂on Non‐Metallic Gold Clusters

Controllable Conversion of CO₂on Non‐Metallic Gold Clusters

The Effect of Poly(vinylpyrrolidone) (PVP) on the Au Catalyzed Reduction of p–nitrophenol: The Fundamental Role of NaBH₄.

Size‐dependent electrophoretic migration and separation of water‐soluble gold nanoclusters by capillary electrophoresis

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Roles of thiolate ligands in the synthesis, properties and catalytic application of gold nanoclusters

Cited by 225 publications

References 308 publications

Controllable Conversion of CO2on Non‐Metallic Gold Clusters

Controllable Conversion of CO2on Non‐Metallic Gold Clusters

The Effect of Poly(vinylpyrrolidone) (PVP) on the Au Catalyzed Reduction of p–nitrophenol: The Fundamental Role of NaBH4.

Size‐dependent electrophoretic migration and separation of water‐soluble gold nanoclusters by capillary electrophoresis

Contact Info

Product

Resources

About

Controllable Conversion of CO₂on Non‐Metallic Gold Clusters

Controllable Conversion of CO₂on Non‐Metallic Gold Clusters

The Effect of Poly(vinylpyrrolidone) (PVP) on the Au Catalyzed Reduction of p–nitrophenol: The Fundamental Role of NaBH₄.