A5012829280- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Nanocluster Synthesis and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Magnetism in coordination complexes
- Organometallic Complex Synthesis and Catalysis
- Advanced Nanomaterials in Catalysis
- Metal-Organic Frameworks: Synthesis and Applications
- Crystallography and molecular interactions
- Advanced Chemical Physics Studies
- Molecular Junctions and Nanostructures
- Nanowire Synthesis and Applications
- Inorganic Chemistry and Materials
- Pharmacological Effects and Toxicity Studies
- Metalloenzymes and iron-sulfur proteins
- Advanced Radiotherapy Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Nonlinear Optical Materials Research
- Surface Chemistry and Catalysis
- Electron and X-Ray Spectroscopy Techniques
- Silicon Nanostructures and Photoluminescence
- Nanomaterials for catalytic reactions
- Carbon Nanotubes in Composites
- Organometallic Compounds Synthesis and Characterization
- Crystal structures of chemical compounds
Xiamen University
2015-2024
Collaborative Innovation Center of Chemistry for Energy Materials
2013-2024
Khoo Teck Puat Hospital
2024
Huaqiao University
2023
University of Pennsylvania
2011-2020
Hospital of the University of Pennsylvania
2012-2020
University of Illinois Chicago
2004-2017
Peking University
2001-2017
Beijing National Laboratory for Molecular Sciences
2011-2017
California University of Pennsylvania
2016
A comprehensive understanding of chemical bonding and reactions at the surface nanomaterials is great importance in rational design their functional properties applications. With rapid development cluster science, it has become clear that atomically precise metal clusters represent ideal models for resolving various important and/or unsolved issues related to science. This Account highlights our recent efforts on fabrication ligand-stabilized coinage nanoclusters with atomic precision from...
Metal nanoclusters whose surface ligands are removable while keeping their metal framework structures intact an ideal system for investigating the influence of on catalysis nanoparticles. We report in this work intermetallic nanocluster containing 62 atoms, Au34Ag28(PhC≡C)34, and its use as a model catalyst to explore importance promoting catalysis. As revealed by single-crystal diffraction, atoms cluster arranged four-concentric-shell Ag@Au17@Ag27@Au17 structure. All phenylalkynyl (PA)...
In this work, a facile ion-pairing strategy for asymmetric synthesis of optically active negatively charged chiral metal nanoparticles using ammonium cations is demonstrated. A new thiolated three-concentric-shell cluster, [Ag28Cu12(SR)24]4–, was first synthesized as racemic mixture and characterized by single-crystal X-ray structure determination. Mass spectrometric measurements revealed relatively strong interactions between the anionic nanocluster cations. Inspired observation,...
Copper-hydrides are known catalysts for several technologically important reactions such as hydrogenation of CO, hydroamination alkenes and alkynes, chemoselective unsaturated ketones to alcohols. Stabilizing copper-based particles by ligand chemistry nanometer scale is an appealing route make active with optimized material economy; however, it has been long believed that the ligand-metal interface, particularly if sulfur-containing thiols used stabilizing agent, may poison catalyst. We...
The complexity of heterogeneous metal catalysts makes it challenging to gain insights into their catalytic mechanisms. Thus, there exists a huge gap between catalysis and organometallic catalysis. With the success in preparation highly robust atomically precise nanocluster (i.e., [Au16(NHC-1)5(PA)3Br2]3+ [Au17(NHC-1)4(PA)4Br4]+, where NHC-1 is bidentate NHC ligand, PA phenylacetylide) with surface motifs anchored on metallic core, we demonstrate this work how core works synergistically...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPure gold cluster of 1:9:9:1:9:9:1 layered structure: a novel 39-metal-atom [(Ph3P)14Au39Cl6]Cl2 with an interstitial atom in hexagonal antiprismatic cageBoon K. Teo, Xiaobo Shi, and Hong ZhangCite this: J. Am. Chem. Soc. 1992, 114, 7, 2743–2745Publication Date (Print):March 1, 1992Publication History Published online1 May 2002Published inissue 1 March...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagic numbers in polygonal and polyhedral clustersBoon K. Teo N. J. A. SloaneCite this: Inorg. Chem. 1985, 24, 26, 4545–4558Publication Date (Print):December 1, 1985Publication History Published online1 May 2002Published inissue 1 December 1985https://pubs.acs.org/doi/10.1021/ic00220a025https://doi.org/10.1021/ic00220a025research-articleACS PublicationsRequest reuse permissionsArticle Views1193Altmetric-Citations143LEARN ABOUT THESE METRICSArticle...
An effective strategy is developed to synthesize high-nuclearity Cu clusters, [Cu53 (RCOO)10 (C≡CtBu)20 Cl2 H18 ]+ (Cu53 ), which the largest CuI /Cu0 cluster reported date. powder and Ph2 SiH2 are employed as reducing agents in synthesis. As revealed by single-crystal diffraction, Cu53 arranged a four-concentric-shell Cu3 @Cu10 @Cu20 structure, possessing an atomic arrangement of concentric M12 icosahedral M20 dodecahedral shells popularly occurs Au/Ag nanoclusters. Surprisingly, can be...
Surface ligands play important roles in controlling the size and shape of metal nanoparticles their surface properties. In this work, we demonstrate that use bulky thiolate ligands, along with halides, as capping agent promotes formation plasmonic multiple-twinned Ag high reactivities. The title nanocluster [Ag141X12(S-Adm)40]3+ (where X = Cl, Br, I; S-Adm 1-adamantanethiolate) has a multiple-shell structure an Ag71 core protected by shell Ag70X12(S-Adm)40. can be considered 20 frequency-two...
Demonstrated herein are the preparation and crystallographic characterization of family fcc silver nanoclusters from Nichol's cube to Rubik's beyond via ligand-control (thiolates phosphines in this case). The basic building block is our previously reported cluster [Ag14(SPhF2)12(PPh3)8] (1). metal frameworks [Ag38(SPhF2)26(PR'3)8] (22) [Ag63(SPhF2)36(PR'3)8]+ (23), where HSPhF2 = 3,4-difluorothiophenol R' alkyl/aryl, composed 2 × 4 8 cubes 1, respectively. All serial clusters share similar...
A general strategy, using mixed ligands, is utilized to synthesize atomically precise, intrinsically chiral nanocluster [Ag78(DPPP)6(SR)42] (Ag78) where DPPP the achiral 1,3-bis(diphenyphosphino)propane and SR = SPhCF3. Ag78 crystallizes as racemates in a centric space group. Using diphosphines BDPP 2,4-bis(diphenylphosphino)pentane, enantiomeric pair [Ag78(R/S-BDPP)6(SR)42] can be prepared with 100% optical purity. The gives rise to, separately, two asymmetric surface coordination motifs...
This paper reports co-crystallization of two atomically precise, different-size ligand-stabilized nanoclusters, a spherical (AuAg)267(SR)80 and smaller trigonal-prismatic (AuAg)45(SR)27(PPh3)6 in 1:1 ratio, characterized fully by X-ray crystallographic analysis (SR = 2,4-SPhMe2). The larger cluster has four concentric-shell icosahedral structure Ag@M12@M42@M92@Ag120(SR)80 (M Au or Ag) with the inner-core M147 icosahedron observed here for metal nanoparticles. an open electron shell 187...
Abstract Bottom-up design of functional device components based on nanometer-sized building blocks relies accurate control their self-assembly behavior. Atom-precise metal nanoclusters are well-characterizable for designing tunable nanomaterials, but it has been challenging to achieve directed assembly macroscopic cluster-based materials with highly anisotropic properties. Here, we discover a solvent-mediated 34-atom intermetallic gold–silver clusters protected by 20 1-ethynyladamantanes...
A general method, using mixed ligands (here diphosphines and thiolates) is devised to turn an achiral metal cluster, Au13 Cu2 , into enantiomeric pair by breaking (lowering) the overall molecular symmetry with ligands. Using diphosphine, a racemic [Au13 (DPPP)3 (SPy)6 ]+ was prepared which crystallizes in centrosymmetric space groups. chiral diphosphines, enantioselective synthesis of optically pure, ((2r,4r)/(2s,4s)-BDPP)3 achieved one pot. Their circular dichroism (CD) spectra give perfect...
Abstract By using ethylene glycol and monocarboxylic acid as surface ligands, a series of cyclic Ti‐oxo clusters (CTOC) with permanent microporosity are successfully synthesized. With {Ti 32 O 16 } backbone made eight connected Ti 4 tetrahedral cages that arranged in zigzag fashion, the have “donut” shape an inner diameter 8.3 Å, outer 26.9 Å height 10.4 Å. While both walls modified by double‐deprotonated glycolates, their upper lower surfaces bound carboxylates mono‐deprotonated glycolates....