Monoplatinum Doping of Gold Nanoclusters and Catalytic Application

Hu, Qian; Jiang, De‐en; Gao, Li; Gayathri, Chakicherla; Das, Anindita; Gil, Roberto R.; Jin, Rongchao

doi:10.1021/ja307657a

Cited by 444 publications

(588 citation statements)

References 62 publications

Supporting

Mentioning

569

Contrasting

Order By: Relevance

“…al. 17 and a theoretical study by Tlahuice-Flores in 2014 have revealed the structure of the Au 6 Ag 7 (SR) 13 cluster as an octahedral-like Ag 6 core protected by two dimers and one Au 2 Ag(SR) 4 motif. 18 Thus, both Ag 6 Au 7 and Au 25 8 clusters show a clear preference to incorporate Ag atoms into their core, and their frontier (HOMO and LUMO) levels have contribution from Ag and S atoms.…”

Section: Bmentioning

confidence: 99%

“…Potential applications of bimetallic thiolated clusters include catalysis 15 and bio-sensors. 16 Regarding the smallest bimetallic cluster, an experimental study by Pradeep et.…”

Section: Bmentioning

confidence: 99%

“…Therefore, the electronic excitations are influenced by foreign atoms, which are incorporated into the monometallic clusters. Thiolated Au 15 and Au 18 clusters are important systems because they have been devised as the smallest thiolated gold clusters with two and four electrons, respectively. The thiolated Au 15 cluster model has been reported and it was proposed as a Au 4 core protected by two trimer motifs plus a closed pentameric [SR-Au] 5 ring 19 or protected by one heptamer and one tetramer motif.…”

Section: Bmentioning

confidence: 99%

“…Thiolated Au 15 and Au 18 clusters are important systems because they have been devised as the smallest thiolated gold clusters with two and four electrons, respectively. The thiolated Au 15 cluster model has been reported and it was proposed as a Au 4 core protected by two trimer motifs plus a closed pentameric [SR-Au] 5 ring 19 or protected by one heptamer and one tetramer motif. 20 The latter model of the thiolated Au 15 cluster was proposed based on the superior agreement between the calculated CD spectrum featuring a prominent negative peak located at 3.48 eV and the experimental 3.42 eV band.…”

Section: Bmentioning

confidence: 99%

See 3 more Smart Citations

Thiolated Au₁₈ cluster: preferred Ag sites for doping, structures, and optical and chiroptical properties

Molina

Tlahuice‐Flores

2016

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

Recently, the X-ray determined structure of the thiolated Au 18 cluster has been reported. In this communication, we addressed a study of structures and chiroptical properties of thiolated Au 18 cluster doped with up to ten Ag atoms, which have been calculated by Time Dependent Density Functional Theory (TD-DFT). The number of Ag atoms was steadily varied and more stable isomers showed optical and Circular Dichroism (CD) spectra distinct from that found for the parent Au 18 cluster. Doping with more than four Ag atoms results in enhancement of the oscillator strength of the HOMO-LUMO peak and it is expected that this feature can be exploited for photoluminescence applications.The doping of thiolated gold clusters has captured our interest since the first experimental report of Pd doping of the anionic Au 25 (SR) 18 cluster was proposed based on the superior agreement between the calculated CD spectrum featuring a prominent negative peak located at 3.48 eV and the experimental 3.42 eV band. 20Following this line, experimental work devoted to the elucidation of the structure of thiolated Au 18 cluster succeeded recently 21 in providing theoretical groups 22 the opportunity to correct their algorithms used to propose structures and to improve our knowledge in this field. Herein, a DFT 23 study of the X-ray determined structure of thiolated Au 18 cluster produced by doping with up to ten Ag atoms is addressed. 21b The aim of this study is to determinate how the structure, the HOMO-LUMO (HL) gap values, the oscillator strength of the lower energy peak, and the optical and chiroptical properties are affected by Ag doping. A systematic search of lowest-energy isomers was carried out using the PBE functional 24 for the exchange and correlation (XC) terms.

show abstract

Section: Bmentioning

confidence: 99%

“…Potential applications of bimetallic thiolated clusters include catalysis 15 and bio-sensors. 16 Regarding the smallest bimetallic cluster, an experimental study by Pradeep et.…”

Section: Bmentioning

confidence: 99%

Section: Bmentioning

confidence: 99%

Section: Bmentioning

confidence: 99%

See 2 more Smart Citations

Thiolated Au₁₈ cluster: preferred Ag sites for doping, structures, and optical and chiroptical properties

Molina

Tlahuice‐Flores

2016

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

“…[13][14][15] Thiol-stabilized Au nanoclusters represent an important class of noble metal nanoparticles whose molecular structures have been characterized by X-ray single-crystal diffractions [15][16][17][18][19] and successfully adopted to precisely tailor their electronic and surface properties. 20,21 However, in contrast to thiol-stabilized Au nanoclusters, no crystal structure determination has been reported on all-thiol-protected silver nanoparticles, although Ag or Au/Ag nanoclusters with uniform size and even with precise number of atoms have been widely achieved. [22][23][24][25][26][27][28][29][30][31][32][33] Here we report on the first successful crystal structure determination and theoretical analysis of six all-thiol-protected silver and silver-gold intermetallic nanoparticles, namely three Ag 44 (SR) 30 and three Au 12 Ag 32 (SR) 30 nanoclusters stabilized with fluorinated arylthiols (SR ¼ SPhF, SPhF 2 or SPhCF 3 ).…”

mentioning

confidence: 99%

All-thiol-stabilized Ag44 and Au12Ag32 nanoparticles with single-crystal structures

et al. 2013

View full text Add to dashboard Cite

Noble metal nanoparticles stabilized by organic ligands are important for applications in assembly, site-specific bioconjugate labelling and sensing, drug delivery and medical therapy, molecular recognition and molecular electronics, and catalysis. Here we report crystal structures and theoretical analysis of three Ag 44 (SR) 30 and three Au 12 Ag 32 (SR) 30 intermetallic nanoclusters stabilized with fluorinated arylthiols (SR ¼ SPhF, SPhF 2 or SPhCF 3 ). The nanocluster forms a Keplerate solid of concentric icosahedral and dodecahedral atom shells, protected by six Ag 2 (SR) 5 units. Positive counterions in the crystal indicate a high negative charge of 4 À per nanoparticle, and density functional theory calculations explain the stability as an 18-electron superatom shell closure in the metal core. Highly featured optical absorption spectra in the ultraviolet-visible region are analysed using time-dependent density functional perturbation theory. This work forms a basis for further understanding, engineering and controlling of stability as well as electronic and optical properties of these novel nanomaterials.

show abstract

Gold Nanoparticles

Panikkanvalappil¹,

Khatun²,

Pradeep³

2019

Kirk-Othmer Encyclopedia of Chemical Technology

View full text Add to dashboard Cite

Gold nanoparticles (GNPs) have been the most extensively studied colloidal systems in the area of nanoscience and nanotechnology owing to their fascinating physical and chemical properties. Nanoscience and nanotechnology are often inseparable from advances in GNPs. Diversity in the modes of preparation, unique properties, unusual stability in comparison to related materials make GNPs ideal for a vast array of applications in chemistry, biology, engineering, and medicine. This article gives an overview of the fascinating area of GNPs. The rich history of GNPs is briefly reviewed in the beginning of the article followed by a concise description of various pioneering synthetic strategies and their properties. An overview of novel anisotropic gold nanostructures is described in the subsequent section. Because of the importance of assembled nanostructures in tuning the collective properties of nanomaterials, assemblies of diverse GNPs are briefly described. Furthermore, a few interesting aspects of supported GNPs have also been outlined. Toward the end of the article, we have highlighted important applications of GNPs and have given a special mention of a new category of ultra‐small materials of gold known as atomically precise clusters. The article ends with the new directions of GNPs and outlines the prospects of future applications.

show abstract

Monoplatinum Doping of Gold Nanoclusters and Catalytic Application

Cited by 444 publications

References 62 publications

Thiolated Au₁₈ cluster: preferred Ag sites for doping, structures, and optical and chiroptical properties

Thiolated Au₁₈ cluster: preferred Ag sites for doping, structures, and optical and chiroptical properties

All-thiol-stabilized Ag44 and Au12Ag32 nanoparticles with single-crystal structures

Gold Nanoparticles

Contact Info

Product

Resources

About

Monoplatinum Doping of Gold Nanoclusters and Catalytic Application

Cited by 444 publications

References 62 publications

Thiolated Au18 cluster: preferred Ag sites for doping, structures, and optical and chiroptical properties

Thiolated Au18 cluster: preferred Ag sites for doping, structures, and optical and chiroptical properties

All-thiol-stabilized Ag44 and Au12Ag32 nanoparticles with single-crystal structures

Gold Nanoparticles

Contact Info

Product

Resources

About

Thiolated Au₁₈ cluster: preferred Ag sites for doping, structures, and optical and chiroptical properties

Thiolated Au₁₈ cluster: preferred Ag sites for doping, structures, and optical and chiroptical properties