Nonsuperatomic [Au23(SC6H11)16]− Nanocluster Featuring Bipyramidal Au15 Kernel and Trimeric Au3(SR)4 Motif

Das, Anindita; Li, Tao; Nobusada, Katsuyuki; Zeng, Chenjie; Rosi, Nathaniel L.; Jin, Rongchao

doi:10.1021/ja409177s

Cited by 322 publications

(324 citation statements)

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“…13−16 Among them, gold clusters have been studied extensively. Crystal structures of several gold clusters such as Au 23 , 17 49 and Ag 44 33 have been reported, whereas only one alloy, namely, Cu n Au 25−n (n = 1−9), 50 is known with such monolayers. So far, to the best of our knowledge, there is no report on Ag−Pd alloy clusters.…”

Section: Section: Physical Processes In Nanomaterials and Nanostructuresmentioning

confidence: 99%

Isolation and Tandem Mass Spectrometric Identification of a Stable Monolayer Protected Silver–Palladium Alloy Cluster

Sarkar

Chakraborty

Panwar

et al. 2014

J. Phys. Chem. Lett.

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A selenolate-protected Ag−Pd alloy cluster was synthesized using a one-pot solution-phase route. The crude product upon chromatographic analyses under optimized conditions gave three distinct clusters with unique optical features. One of these exhibits a molecular peak centered at m/z 2839, in its negative ion mass spectrum assigned to Ag 5 Pd 4 (SePh) 12 − , having an exact match with the corresponding calculated spectrum. Tandem mass spectrometry of the molecular ion peak up to MS 9 was performed. Complex isotope distributions in each of the mass peaks confirmed the alloy composition. We find the Ag 3 Pd 3 − core to be highly stable. The composition was further supported by scanning electron microscopy, energy-dispersive spectroscopy, and X-ray photoelectron spectroscopy. SECTION: Physical Processes in Nanomaterials and

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Section: Section: Physical Processes In Nanomaterials and Nanostructuresmentioning

confidence: 99%

Isolation and Tandem Mass Spectrometric Identification of a Stable Monolayer Protected Silver–Palladium Alloy Cluster

Sarkar

Chakraborty

Panwar

et al. 2014

J. Phys. Chem. Lett.

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“…Since the elucidation of the Au 102 (SR) 44 NC in 2007 [19], the catalog of possible Au core geometries and stabilizing surface structures from solved crystal structures and DFT predictions has grown significantly [20]. To date, icosahedral, face-centered-cubic (FCC)-ordered and smaller Au core ( < 13 Au atoms) structures have been reported crystallographically for various Au n (SR) m sizes [19,[21][22][23][24][25][26][27][28][29][30]. A couple of selenolate-protected Au NCs have also been recently elucidated with icosahedral or small Au 8 core structures [31,32].…”

Section: Introduction To Gold Nanoclustersmentioning

confidence: 99%

Bonding properties of thiolate-protected gold nanoclusters and structural analogs from X-ray absorption spectroscopy

Chevrier

Yang

Chatt

et al. 2015

Nanotechnology Reviews

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Abstract:Subnanometer, atomically precise thiolateprotected gold nanoclusters represent an important advancement in our understanding of thiolate-protected gold nanoparticles and thiolate-gold chemistry. Aside from being a link between larger gold nanoparticles and small gold complexes, gold nanoclusters exhibit extraordinary molecule-like optical, electronic, and physicochemical properties that are promising for next-generation imaging agents, sensing devices, or catalysts. The success in elucidating a number of unique thiolate-gold surface and gold core structures has greatly improved our understanding of thiolate-gold nanoclusters. Nevertheless, monitoring the structural and electronic behavior of thiolate-protected gold nanoclusters in a variety of media or environments is crucial for the next step in advancing this class of nanomaterials. Not to mention, there are a number of thiolateprotected gold nanoclusters with unknown structures or compositions that could reveal important insights on application-based properties such as luminescence or catalytic activity. This review summarizes some of the recent contributions from X-ray absorption spectroscopy (XAS) studies on the intriguing bonding properties of thiolate-protected gold nanoclusters and some structural analogs. Advantages from XAS include a local structural, site-and elementspecific analysis, suitable for ultra-small particle sizes (1-2 nm), along with versatile experimental conditions.

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“…8,9,17 A set of eleven ligands, included in experimental or theoretical reports devoted to the study of thiolated gold clusters, is considered along this study. The first set of eight achiral ligands includes para-mercaptobenzoic acid (p-MBA), 18 SPh, 19,20 SPhNO 2 , 21 cyclohexanethiol (S-c-C 6 H 11 ), 1,22,23 2-phenylethylthiolate (2-PET), 24 mercaptopropionic acid (MPA that has been considered in gold nanoparticles), 25 besides the amply used SCH 3 ligand during calculations. Starting from the experimental Au 18 cluster protected by 14 S-c-C 6 H 11 ligands, a set of initial structures was built; some of them are depicted in Fig.…”

mentioning

confidence: 99%

Ligand effects on the optical and chiroptical properties of the thiolated Au₁₈ cluster

Tlahuice‐Flores

2016

Phys. Chem. Chem. Phys.

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The effect of chiral and achiral ligands protecting the inner Au 9 core of the Au 18 (SR) 14 cluster is studied based on density functional theory (DFT) and its corrected long-range interaction (DFT-D) approach. It was found that the electronic properties (energy levels) depend on the specific ligands, which induce distinct distortions on the Au-S framework. However, the substitution of S-c-C 6 H 11 as SCH 3 ligands may be considered to be correct given the obtained resemblance to the displayed bonding, optical and chiroptical properties. A further comparison of the CD and UV spectra displayed by the In 2015, the structure of thiolated Au 18 cluster protected by S-c-C 6 H 11 ligands was solved by means of X-Ray diffractions studies but its CD spectrum was missed. 1In contrast, previous theoretical models 2 and experimental reports had established the Au 18 cluster to be chiral whereby its CD spectra were known. 3 In the experimental report of the Au 18 (SR) 14 cluster the lack of a CD signal was attributed to the presence of a symmetry plane. However, in a recent computational study, the C 1 symmetry was preferred over the C s symmetry by circa 3.0 eV. 4 This result supports the hypotheses that the Au 9 inner core is intrinsically chiral while the cyclohexyl (S-c-C 6 H 11 ) ligand is achiral. In this communication a systematic study of the influence of chiral and achiral ligands on the structural, optical and chiroptical properties of the thiolated Au 18 cluster has been conducted. The importance of this study lies in the photochemical properties of the Au 18 cluster and in its potential applications. 5Two sets of ligands were selected: one set comprised eight achiral ligands and a second set, three chiral ligands. All calculations are based on density functional theory (DFT) 6 and/or its corrected long-range interaction (DFT-D) 7 approach.It is important to mention that the consideration of long-range forces (van der Waals interactions) is important when the organic part of the ligand is constituted by chemical groups that are expected to interact among themselves (interligand interaction) and with the environment. The ligand effects on the structure of thiolated Au 15 cluster was reported in 2013, and the consideration of the N-acetyl-L-cysteine (NAC) as a ligand resulted in a lower energy isomer. 8 Moreover, the effect of ligands on the optical properties of various protected gold clusters has been found or computationally predicted, for example, into the thiolated Au 25 cluster the ligands effect was revealed as a distortion into the Au-S framework, 9 and on the structure of the Au 24 cluster where thiolate or selenolate ligands organized forming various kind of motifs. 10

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Nonsuperatomic [Au₂₃(SC₆H₁₁)₁₆]⁻ Nanocluster Featuring Bipyramidal Au₁₅ Kernel and Trimeric Au₃(SR)₄ Motif

Cited by 322 publications

References 48 publications

Isolation and Tandem Mass Spectrometric Identification of a Stable Monolayer Protected Silver–Palladium Alloy Cluster

Isolation and Tandem Mass Spectrometric Identification of a Stable Monolayer Protected Silver–Palladium Alloy Cluster

Bonding properties of thiolate-protected gold nanoclusters and structural analogs from X-ray absorption spectroscopy

Ligand effects on the optical and chiroptical properties of the thiolated Au₁₈ cluster

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Nonsuperatomic [Au23(SC6H11)16]− Nanocluster Featuring Bipyramidal Au15 Kernel and Trimeric Au3(SR)4 Motif

Cited by 322 publications

References 48 publications

Isolation and Tandem Mass Spectrometric Identification of a Stable Monolayer Protected Silver–Palladium Alloy Cluster

Isolation and Tandem Mass Spectrometric Identification of a Stable Monolayer Protected Silver–Palladium Alloy Cluster

Bonding properties of thiolate-protected gold nanoclusters and structural analogs from X-ray absorption spectroscopy

Ligand effects on the optical and chiroptical properties of the thiolated Au18 cluster

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Nonsuperatomic [Au₂₃(SC₆H₁₁)₁₆]⁻ Nanocluster Featuring Bipyramidal Au₁₅ Kernel and Trimeric Au₃(SR)₄ Motif

Ligand effects on the optical and chiroptical properties of the thiolated Au₁₈ cluster