1
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Dash S, Gutti P, Behera B, Mishra D. Anionic species from multivalent metal salts are differentially retained during aqueous ionic gelation of sodium alginate and could fine-tune the hydrogel properties. Int J Biol Macromol 2024; 265:130767. [PMID: 38471601 DOI: 10.1016/j.ijbiomac.2024.130767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 02/20/2024] [Accepted: 03/08/2024] [Indexed: 03/14/2024]
Abstract
The role of anionic counterions of divalent metal salts in alginate gelation and hydrogel properties has been thoroughly investigated. Three anions were selected from the Hofmeister series, namely sulphate, acetate and chloride, paired in all permutations and combinations with divalent metal cations like calcium, zinc and copper. Spectroscopic analysis revealed the presence of anions and their interaction with the respective metal cations in the hydrogel. The data showed that the gelation time and other hydrogel properties were largely controlled by cations. However, subtle yet significant variations in viscoelasticity, water uptake, drug release and cytocompatibility properties were anion dependent in each cationic group. Computational modelling based study showed that metal-anion-alginate configurations were energetically more stable than the metal-alginate models. The in vitro and in silico studies concluded that acetate anions preceded chlorides in the drug release, swelling and cytocompatibility fronts, followed by sulphate anions in each cationic group. Overall, the data confirmed that anions are an integral part of the metal-alginate complex. Furthermore, anions offer a novel option to further fine-tune the properties of alginate hydrogels for myriads of applications. In addition, full exploration of this novel avenue would enhance the usability of alginate polymers in the pharmaceutical, environmental, biomedical and food industries.
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Affiliation(s)
- Subhasis Dash
- Bioinspired Design Lab, School of BioSciences and Technology (SBST), Vellore Institute of Technology (VIT) Vellore, Tamil Nadu, India
| | - Pavan Gutti
- Bioinspired Design Lab, School of BioSciences and Technology (SBST), Vellore Institute of Technology (VIT) Vellore, Tamil Nadu, India
| | - Birendra Behera
- Department of Biotechnology and Bioinformatics, Sambalpur University, Burla, Odisha, India
| | - Debasish Mishra
- Bioinspired Design Lab, School of BioSciences and Technology (SBST), Vellore Institute of Technology (VIT) Vellore, Tamil Nadu, India.
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2
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Tiihonen J, Häkkinen H. Towards structural optimization of gold nanoclusters with quantum Monte Carlo. J Chem Phys 2023; 159:174301. [PMID: 37909449 DOI: 10.1063/5.0174383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 10/09/2023] [Indexed: 11/03/2023] Open
Abstract
We study the prospects of using quantum Monte Carlo techniques (QMC) to optimize the electronic wavefunctions and atomic geometries of gold compounds. Complex gold nanoclusters are widely studied for diverse biochemical applications, but the dynamic correlation and relativistic effects in gold set the bar high for reliable, predictive simulation methods. Here we study selected ground state properties of few-atom gold clusters by using density functional theory (DFT) and various implementations of the variational Monte Carlo (VMC) and diffusion Monte Carlo. We show that the QMC methods mitigate the exchange-correlation (XC) approximation made in the DFT approach: the average QMC results are more accurate and significantly more consistent than corresponding DFT results based on different XC functionals. Furthermore, we use demonstrate structural optimization of selected thiolated gold clusters with between 1 and 3 gold atoms using VMC forces. The optimization workflow is demonstrably consistent, robust, and its computational cost scales with nb, where b < 3 and n is the system size. We discuss the implications of these results while laying out steps for further developments.
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Affiliation(s)
- Juha Tiihonen
- Department of Physics, Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
| | - Hannu Häkkinen
- Department of Physics, Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
- Department of Chemistry, Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
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3
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Wang M, Chen Y, Tang C. Recent Advances in Ligand Engineering for Gold Nanocluster Catalysis: Ligand Library, Ligand Effects and Strategies. Chem Asian J 2023; 18:e202300463. [PMID: 37552000 DOI: 10.1002/asia.202300463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 07/02/2023] [Indexed: 08/09/2023]
Abstract
Advances in new ligands in the last decade facilitated in-depth studies on the property-relationship of gold nanoclusters and promoted the rational synthesis and related applications of such materials. Currently, more and more new ligands are being explored; thus, the ligand library of AuNCs is being expanded fast, which also enables investigation of ligand effects of AuNCs via direct comparison of different ligating shell with the identical gold core. It is now widely accepted that ligands influence the properties of AuNCs enormously including stability, catalysis, photoluminescence among others. These studies inspired ligand engineering of AuNCs. One of the goals for ligand engineering is to develop ligated AuNC catalysts in which the ligands are able to exert big-enough influence on electronic and steric control over catalysis as in a transition-metal or an enzyme system. Although increasing attention is paid to the further expansion of ligand library, the investigation of design principles and strategies regarding ligands are still in their infant stage. This review summarizes the ligands for AuNC synthesis, the ligand effects on stability and catalysis, and recently developed strategies in promoting AuNC catalytic performance via ligand manipulation.
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Affiliation(s)
- Mengyue Wang
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, Institution National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Yu Chen
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, Institution National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- Department of Medicinal Chemistry, Southwest Medical University, Luzhou, 646000, P. R. China
| | - Cen Tang
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, Institution National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
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4
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McCandler CA, Dahl JC, Persson KA. Phosphine-Stabilized Hidden Ground States in Gold Clusters Investigated via a Au n(PH 3) m Database. ACS NANO 2022; 17:1012-1021. [PMID: 36584276 PMCID: PMC9879275 DOI: 10.1021/acsnano.2c07223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
Nanoclusters are promising materials for catalysis and sensing due to their large surface areas and unique electronic structures which can be tailored through composition, geometry, and chemistry. However, relationships correlating synthesis parameters directly to outcomes are limited. While previous computational studies have mapped the potential energy surface of specific systems of bare nanoclusters by generating and calculating the energies of reasonable structures, it is known that environmental ions and ligands crucially impact the final shape and size. In this work, phosphine-stabilized gold is considered as a test system and DFT calculations are performed for clusters with and without ligands, producing a database containing >10000 structures for Aun(PH3)m (n ≤ 12). We find that the ligation of phosphines affects the thermodynamic stability, bonding, and electronic structure of Au nanoclusters, specifically such that "hidden" ground state cluster geometries are stabilized that are dynamically unstable in the pure gold system. Further, the addition of phosphine introduces steric effects that induce a transition from planar to nonplanar structures at 4-5 Au atoms rather than up to 13-14 Au atoms, as previously predicted for bare clusters. This work highlights the importance of considering the ligand environment in the prediction of nanocluster morphology and functionality, which adds complexity as well as a rich opportunity for tunability.
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Affiliation(s)
- Caitlin A. McCandler
- Department of Materials Science,
University of California, Berkeley, California94720,
United States
- Materials Science Division, Lawrence
Berkeley National Laboratory, Berkeley, California94720, United
States
| | - Jakob C. Dahl
- Materials Science Division, Lawrence
Berkeley National Laboratory, Berkeley, California94720, United
States
- Department of Chemistry, University of
California, Berkeley, California94720, United
States
- Molecular Foundry, Lawrence Berkeley
National Laboratory, Berkeley, California94720, United
States
| | - Kristin A. Persson
- Department of Materials Science,
University of California, Berkeley, California94720,
United States
- Molecular Foundry, Lawrence Berkeley
National Laboratory, Berkeley, California94720, United
States
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5
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Philliber M, Baxter ET, Johnson GE. Synthesis and Stability of Mixed-Diphosphine Ligated Gold Clusters. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2022; 33:2138-2146. [PMID: 36166416 DOI: 10.1021/jasms.2c00217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Sub-nanometer gold clusters are promising size- and composition-tunable materials that may be used for advanced technological applications such as catalysis, energy generation, and microelectronics. Synthesis and characterization of phosphine ligated gold clusters containing different ligands provide insight into how steric and electronic effects resulting from changes in chemical functionality influence cluster size, stability, and formation in solution. Herein, we demonstrate that synthesizing gold clusters using two different diphosphines in solution at the same time results in a broad distribution of novel mixed-ligand clusters. In comparison, adding a second diphosphine to a solution of gold clusters presynthesized with another diphosphine does not result in extensive formation of mixed-ligand species. Utilizing high-mass resolution electrospray ionization mass spectrometry, we determined novel cluster compositions and observed size-dependent trends in gold clusters that undergo ligand exchange forming mixed diphosphine species. Adjacent peaks in the mass spectra, separated by characteristic mass-to-charge ratios, provide evidence for multiple 1,3-bis(diphenylphosphino)propane (L3) and 1,5-bis(diphenylphosphino)pentane (L5) ligands on cationic clusters containing 8, 10, 11, and 22 gold atoms. Energy-resolved collision-induced dissociation experiments provide qualitative insight into how different diphosphine ligands affect the relative stability of specific size gold clusters. Our results indicate that mixed-ligand clusters containing both L3 and L5 are generally more stable than their single ligand counterparts containing either L3 or L5. These molecular-level insights will facilitate the rational and scalable synthesis of gold clusters for targeted applications.
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Affiliation(s)
- Mallory Philliber
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- Department of Chemistry, University of Utah, 315 S 1400 E, Room 2020, Salt Lake City, Utah 84112, United States
| | - Eric T Baxter
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Grant E Johnson
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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6
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Adnan RH, Madridejos JML, Alotabi AS, Metha GF, Andersson GG. A Review of State of the Art in Phosphine Ligated Gold Clusters and Application in Catalysis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2105692. [PMID: 35332703 PMCID: PMC9130904 DOI: 10.1002/advs.202105692] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 02/23/2022] [Indexed: 05/28/2023]
Abstract
Atomically precise gold clusters are highly desirable due to their well-defined structure which allows the study of structure-property relationships. In addition, they have potential in technological applications such as nanoscale catalysis. The structural, chemical, electronic, and optical properties of ligated gold clusters are strongly defined by the metal-ligand interaction and type of ligands. This critical feature renders gold-phosphine clusters unique and distinct from other ligand-protected gold clusters. The use of multidentate phosphines enables preparation of varying core sizes and exotic structures beyond regular polyhedrons. Weak gold-phosphorous (Au-P) bonding is advantageous for ligand exchange and removal for specific applications, such as catalysis, without agglomeration. The aim of this review is to provide a unified view of gold-phosphine clusters and to present an in-depth discussion on recent advances and key developments for these clusters. This review features the unique chemistry, structural, electronic, and optical properties of gold-phosphine clusters. Advanced characterization techniques, including synchrotron-based spectroscopy, have unraveled substantial effects of Au-P interaction on the composition-, structure-, and size-dependent properties. State-of-the-art theoretical calculations that reveal insights into experimental findings are also discussed. Finally, a discussion of the application of gold-phosphine clusters in catalysis is presented.
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Affiliation(s)
- Rohul H. Adnan
- Department of Chemistry, Faculty of ScienceCenter for Hydrogen EnergyUniversiti Teknologi Malaysia (UTM)Johor Bahru81310Malaysia
| | | | - Abdulrahman S. Alotabi
- Flinders Institute for NanoScale Science and TechnologyFlinders UniversityAdelaideSouth Australia5042Australia
- Department of PhysicsFaculty of Science and Arts in BaljurashiAlbaha UniversityBaljurashi65655Saudi Arabia
| | - Gregory F. Metha
- Department of ChemistryUniversity of AdelaideAdelaideSouth Australia5005Australia
| | - Gunther G. Andersson
- Flinders Institute for NanoScale Science and TechnologyFlinders UniversityAdelaideSouth Australia5042Australia
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7
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Ma YY, Yu YQ, Cheng LJ. Electronic stability of bimetallic Au2@Cu6 nanocluster: Closed-shell interaction and multicenter bonding. CHINESE J CHEM PHYS 2020. [DOI: 10.1063/1674-0068/cjcp1912200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ying-ying Ma
- Department of Chemistry, Anhui University, Hefei 230601, China
| | - Yuan-qin Yu
- School of Physics and Materials Science, Anhui University, Hefei 230601, China
| | - Long-jiu Cheng
- Department of Chemistry, Anhui University, Hefei 230601, China
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei 230601, China
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8
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Weerawardene KLDM, Pandeya P, Zhou M, Chen Y, Jin R, Aikens CM. Luminescence and Electron Dynamics in Atomically Precise Nanoclusters with Eight Superatomic Electrons. J Am Chem Soc 2019; 141:18715-18726. [DOI: 10.1021/jacs.9b07626] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
| | - Pratima Pandeya
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
| | - Meng Zhou
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Yuxiang Chen
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Rongchao Jin
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Christine M. Aikens
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
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9
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Burgos JC, Mejía SM, Metha GF. Effect of Charge and Phosphine Ligands on the Electronic Structure of the Au 8 Cluster. ACS OMEGA 2019; 4:9169-9180. [PMID: 31460005 PMCID: PMC6648428 DOI: 10.1021/acsomega.9b00225] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 04/24/2019] [Indexed: 05/07/2023]
Abstract
In this work, we use density functional theory calculations with a hybrid exchange-correlation functional and effective core pseudopotentials to determine the geometry of bare and phosphine-protected Au8 nanoclusters and characterize their electronic structure. Au8 clusters were bonded to four and eight PH3 ligands in order to evaluate the effect of ligand concentration on the electronic structure, while different positional configurations were also tried for four ligands attached to the cluster. We show that the neutral clusters become more nucleophilic as the ligands bind to the clusters at stable sites. The ground-state planar configuration of Au8 is maintained depending on the concentration and position of ligands. The effect of ionizing to the +2 charge state results in disruption of planar geometry in some cases because of inoccupation of a molecular orbital with the Au-Au bonding character. Natural bond order charge analyses showed that Au atoms oxidize upon ionization, instead of phosphine. The net positive charge makes the clusters more electrophilic with a capacity to absorb electrons from nucleophiles depending on the concentration and position of ligands and on the concentration of low-coordinated gold atoms. Besides, ionization energies and electron affinities were calculated through different mechanisms, finding that both variables are much higher for charged systems and change inversely with the concentration of ligands.
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Affiliation(s)
- Juan C. Burgos
- Programa
de Ingeniería Química, Universidad
de Cartagena, Cartagena 130015, Colombia
- Departamento
de Química, Pontificia Universidad
Javeriana, Bogotá 110231, Colombia
- E-mail: (J.C.B.)
| | - Sol M. Mejía
- Departamento
de Química, Pontificia Universidad
Javeriana, Bogotá 110231, Colombia
- E-mail: (S.M.M.)
| | - Gregory F. Metha
- Department
of Chemistry, University of Adelaide, Adelaide, South Australia 5005, Australia
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10
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Golosnaya MN, Pichugina DA, Kuz’menko NE. Structure and reactivity of gold cluster protected by triphosphine ligands: DFT study. Struct Chem 2019. [DOI: 10.1007/s11224-019-01292-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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11
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Parrish KA, King M, Ligare MR, Johnson GE, Hernández H. Role of sterics in phosphine-ligated gold clusters. Phys Chem Chem Phys 2019; 21:1689-1699. [DOI: 10.1039/c8cp04961k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study examined the solution-phase exchange reactions of triphenylphosphine (PPh3) ligands on Au8L72+ (L = PPh3) gold clusters with three different tolyl ligands using electrospray ionization mass spectrometry to provide insight into how steric differences in the phosphines influence the extent of ligand exchange and the stability of the resulting mixed-phosphine clusters.
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Affiliation(s)
| | - Mary King
- Department of Chemistry
- University of Texas at Austin
- Austin
- USA
| | - Marshall R. Ligare
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Grant E. Johnson
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
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12
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Weerawardene KLDM, Häkkinen H, Aikens CM. Connections Between Theory and Experiment for Gold and Silver Nanoclusters. Annu Rev Phys Chem 2018; 69:205-229. [PMID: 29490202 DOI: 10.1146/annurev-physchem-052516-050932] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Ligand-stabilized gold and silver nanoparticles are of tremendous current interest in sensing, catalysis, and energy applications. Experimental and theoretical studies have closely interacted to elucidate properties such as the geometric and electronic structures of these fascinating systems. In this review, the interplay between theory and experiment is described; areas such as optical absorption and doping, where the theory-experiment connections are well established, are discussed in detail; and the current status of these connections in newer fields of study, such as luminescence, transient absorption, and the effects of solvent and the surrounding environment, are highlighted. Close communication between theory and experiment has been extremely valuable for developing an understanding of these nanocluster systems in the past decade and will undoubtedly continue to play a major role in future years.
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Affiliation(s)
| | - Hannu Häkkinen
- Departments of Physics and Chemistry and Nanoscience Center, University of Jyväskylä, FI-40014 Jyväskylä, Finland
| | - Christine M Aikens
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, USA;
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13
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Alver Ö, Parlak C, Elzagheid MI, Ramasami P. Absorption mechanism, structural and electronic properties of MC19 (M = B and Si) fullerenes with 1-acetylpiperazine. ADSORPT SCI TECHNOL 2018. [DOI: 10.1177/0263617417722923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The interaction mechanisms of undoped, silicon- and boron-doped C20 fullerenes and 1-acetylpiperazine (1-ap) were investigated. Stability, electronic properties, influence of water on the solubility and stability, molecular parameters, descriptive vibrational bands and nuclear magnetic resonance shielding values are reported. The quantum mechanical calculations were carried out using the M06-2X functional and the 6-31G(d) basis set. It is observed that all the complexes are more stabilized in water compared to the gas phase. The most stable complex was found as silicon-doped fullerene interacting with the carbonyl edge of 1-ap releasing energy of 64.13 kcal/mol in water.
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Affiliation(s)
- Özgür Alver
- Department of Physics, Science Faculty, Anadolu University, Eskisehir, Turkey
| | - Cemal Parlak
- Department of Physics, Science Faculty, Ege University, Bornova, Izmir, Turkey
| | - Mohamed I Elzagheid
- Department of Chemical and Process Engineering, Jubail Industrial College, Jubail Industrial City, Saudi Arabia
| | - Ponnadurai Ramasami
- Computational Chemistry Group, Department of Chemistry, Faculty of Science, University of Mauritius, Réduit, Moka, Mauritius; Department of Applied Chemistry, University of Johannesburg, Johannesburg South Africa
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14
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Alver Ö, Bilge M, Atar N, Parlak C, Şenyel M. Interaction mechanisms and structural properties of MC19 (M = Si and Al) fullerenes with chlorophenylpiperazine isomers. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.01.100] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Ligare MR, Johnson GE, Laskin J. Observing the real time formation of phosphine-ligated gold clusters by electrospray ionization mass spectrometry. Phys Chem Chem Phys 2017. [DOI: 10.1039/c7cp01402c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Real-time monitoring of the gold cluster synthesis by electrospray ionization mass spectrometry reveals distinct formation pathways for Au8, Au9 and Au10 clusters.
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Affiliation(s)
- Marshall R. Ligare
- Physical Sciences Division
- Pacific Northwest National Laboratory
- P. O. Box 999
- Richland
- USA
| | - Grant E. Johnson
- Physical Sciences Division
- Pacific Northwest National Laboratory
- P. O. Box 999
- Richland
- USA
| | - Julia Laskin
- Physical Sciences Division
- Pacific Northwest National Laboratory
- P. O. Box 999
- Richland
- USA
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16
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Abstract
We analyze the pattern of binding energies (BEs) of small Aun clusters (n = 1-7, 11) with lone-pair ligands (L = H2O, SH2, NH3, PH3, PF3, PCl3, and PMe3) employing the density functional theory. We use PBE0 functional with the dispersion correction and scalar relativistic effective core potential. This approach provides correct BEs when compared with benchmark CCSD(T) calculations for Au-L and Au2-L complexes. The pattern of BEs of Aun-L complexes is irregular with BE for Au3 ≈ Au4 > Au2 > Au7 > Au5 > Au11 > Au6 > Au1. Electron affinities (EAs) of Aun clusters exhibit oscillatory pattern with the cluster size. Binding energies of Aun-L complexes are oscillatory as well following EAs of Aun clusters. BEs of odd and even Aun-L complexes were analyzed separately. The bonding mechanism in odd Aun-L complexes is dominated by the lone pair → metal electron donation to the singly occupied valence Aun orbital accompanied by the back-donation. Even Aun clusters create covalent Aun-L bonds with BEs higher than those in odd Aun-L complexes. The BEs pattern and optimized geometries of Aun-L complexes correspond to the picture of creating the gold-ligand bond through the lone pair of a ligand interacting with the singly occupied molecular orbital in odd clusters or lowest unoccupied molecular orbital in even clusters of Aun. Ligands in both odd and even Aun-L complexes form three groups with binding energies that correlate with their ionization energies. The lowest BE is calculated for H2O as a ligand, followed by SH2 and NH3. PX3 ligands exhibit highest BEs.
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Affiliation(s)
- Tomáš Rajský
- Department of Physical and Theoretical Chemistry, Faculty of Natural Sciences, Comenius University , Mlynská dolina, Ilkovičova 6, 841 04 Bratislava, Slovakia
| | - Miroslav Urban
- Department of Physical and Theoretical Chemistry, Faculty of Natural Sciences, Comenius University , Mlynská dolina, Ilkovičova 6, 841 04 Bratislava, Slovakia.,Faculty of Materials Science and Technology in Trnava, Advanced Technologies Research Institute, Slovak University of Technology in Bratislava , Bottova 25, 917 24 Trnava, Slovakia
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17
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Johnson GE, Laskin J. Understanding ligand effects in gold clusters using mass spectrometry. Analyst 2016; 141:3573-89. [PMID: 27221357 DOI: 10.1039/c6an00263c] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
This review summarizes recent research on the influence of phosphine ligands on the size, stability, and reactivity of gold clusters synthesized in solution. Sub-nanometer clusters exhibit size- and composition-dependent properties that are unique from those of larger nanoparticles. The highly tunable properties of clusters and their high surface-to-volume ratio make them promising candidates for a variety of technological applications. However, because "each-atom-counts" toward defining cluster properties it is critically important to develop robust synthesis methods to efficiently prepare clusters of predetermined size. For decades phosphines have been known to direct the size-selected synthesis of gold clusters. Despite the preparation of numerous species it is still not understood how different functional groups at phosphine centers affect the size and properties of gold clusters. Using electrospray ionization mass spectrometry (ESI-MS) it is possible to characterize the effect of ligand substitution on the distribution of clusters formed in solution at defined reaction conditions. In addition, ligand exchange reactions on preformed clusters may be monitored using ESI-MS. Collision induced dissociation (CID) may also be employed to obtain qualitative insight into the fragmentation of mixed ligand clusters and the relative binding energies of differently substituted phosphines. Quantitative ligand binding energies and cluster stability may be determined employing surface induced dissociation (SID) in a custom-built Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR-MS). Rice-Ramsperger-Kassel-Marcus (RRKM) based modeling of the SID data allows dissociation energies and entropy values to be extracted. The charge reduction and reactivity of atomically precise gold clusters, including partially ligated species generated in the gas-phase by in source CID, on well-defined surfaces may be explored using ion soft landing (SL) in a custom-built instrument combined with in situ time of flight secondary ion mass spectrometry (TOF-SIMS). Jointly, this multipronged experimental approach allows characterization of the full spectrum of relevant phenomena including cluster synthesis, ligand exchange, thermochemistry, surface immobilization, and reactivity. The fundamental insights obtained from this work will facilitate the directed synthesis of gold clusters with predetermined size and properties for specific applications.
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Affiliation(s)
- Grant E Johnson
- Physical Sciences Division, Pacific Northwest National Laboratory, P. O. Box 999, MSIN K8-88, Richland, Washington 99352, USA.
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18
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White R, Bennett T, Golovko V, Andersson GG, Metha GF. A Systematic Density Functional Theory Study of the Complete De-ligation of Ru3(CO)12. ChemistrySelect 2016. [DOI: 10.1002/slct.201600082] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Reuben White
- Department of Chemistry; University of Adelaide; South Australia 5005 AUSTRALIA
| | - Trystan Bennett
- Department of Chemistry; University of Adelaide; South Australia 5005 AUSTRALIA
| | - Vladimir Golovko
- The MacDiarmid Institute for Advanced Materials and Nanotechnology; Department of Chemistry; University of Canterbury; Christchurch 8140 NEW ZEALAND
| | - Gunther G. Andersson
- Flinders Centre for NanoScale Science and Technology; Flinders University; Adelaide SA 5001 AUSTRALIA
| | - Gregory F. Metha
- Department of Chemistry; University of Adelaide; South Australia 5005 AUSTRALIA
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19
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Kreutzer J, Blaha P, Schubert U. Assessment of different basis sets and DFT functionals for the calculation of structural parameters, vibrational modes and ligand binding energies of Zr 4 O 2 (carboxylate) 12 clusters. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.03.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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21
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Higaki T, Liu C, Zeng C, Jin R, Chen Y, Rosi NL, Jin R. Controlling the Atomic Structure of Au30
Nanoclusters by a Ligand-Based Strategy. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601947] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Tatsuya Higaki
- Department of Chemistry; Carnegie Mellon University; Pittsburgh PA 15213 USA
| | - Chong Liu
- Department of Chemistry; University of Pittsburgh; Pittsburgh PA 15213 USA
| | - Chenjie Zeng
- Department of Chemistry; Carnegie Mellon University; Pittsburgh PA 15213 USA
| | - Renxi Jin
- Department of Chemistry; Carnegie Mellon University; Pittsburgh PA 15213 USA
- School of Chemistry; Northeast Normal University, Changchun; Jilin 130024 China
| | - Yuxiang Chen
- Department of Chemistry; Carnegie Mellon University; Pittsburgh PA 15213 USA
| | - Nathaniel L. Rosi
- Department of Chemistry; University of Pittsburgh; Pittsburgh PA 15213 USA
| | - Rongchao Jin
- Department of Chemistry; Carnegie Mellon University; Pittsburgh PA 15213 USA
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22
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Higaki T, Liu C, Zeng C, Jin R, Chen Y, Rosi NL, Jin R. Controlling the Atomic Structure of Au30
Nanoclusters by a Ligand-Based Strategy. Angew Chem Int Ed Engl 2016; 55:6694-7. [DOI: 10.1002/anie.201601947] [Citation(s) in RCA: 137] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Tatsuya Higaki
- Department of Chemistry; Carnegie Mellon University; Pittsburgh PA 15213 USA
| | - Chong Liu
- Department of Chemistry; University of Pittsburgh; Pittsburgh PA 15213 USA
| | - Chenjie Zeng
- Department of Chemistry; Carnegie Mellon University; Pittsburgh PA 15213 USA
| | - Renxi Jin
- Department of Chemistry; Carnegie Mellon University; Pittsburgh PA 15213 USA
- School of Chemistry; Northeast Normal University, Changchun; Jilin 130024 China
| | - Yuxiang Chen
- Department of Chemistry; Carnegie Mellon University; Pittsburgh PA 15213 USA
| | - Nathaniel L. Rosi
- Department of Chemistry; University of Pittsburgh; Pittsburgh PA 15213 USA
| | - Rongchao Jin
- Department of Chemistry; Carnegie Mellon University; Pittsburgh PA 15213 USA
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23
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Yao H, Iwatsu M. Water-Soluble Phosphine-Protected Au₁₁ Clusters: Synthesis, Electronic Structure, and Chiral Phase Transfer in a Synergistic Fashion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:3284-93. [PMID: 26986535 DOI: 10.1021/acs.langmuir.6b00539] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Synthesis of atomically precise, water-soluble phosphine-protected gold clusters is still currently limited probably due to a stability issue. We here present the synthesis, magic-number isolation, and exploration of the electronic structures as well as the asymmetric conversion of triphenylphosphine monosulfonate (TPPS)-protected gold clusters. Electrospray ionization mass spectrometry and elemental analysis result in the primary formation of Au11(TPPS)9Cl undecagold cluster compound. Magnetic circular dichroism (MCD) spectroscopy clarifies that extremely weak transitions are present in the low-energy region unresolved in the UV-vis absorption, which can be due to the Faraday B-terms based on the magnetically allowed transitions in the cluster. Asymmetric conversion without changing the nuclearity is remarkable by the chiral phase transfer in a synergistic fashion, which yields a rather small anisotropy factor (g-factor) of at most (2.5-7.0) × 10(-5). Quantum chemical calculations for model undecagold cluster compounds are then used to evaluate the optical and chiroptical responses induced by the chiral phase transfer. On this basis, we find that the Au core distortion is ignorable, and the chiral ion-pairing causes a slight increase in the CD response of the Au11 cluster.
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Affiliation(s)
- Hiroshi Yao
- Graduate School of Material Science, University of Hyogo , 3-2-1 Koto, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan
| | - Mana Iwatsu
- Graduate School of Material Science, University of Hyogo , 3-2-1 Koto, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan
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24
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Tian Z, Cheng L. Electronic and geometric structures of Au30 clusters: a network of 2e-superatom Au cores protected by tridentate protecting motifs with u3-S. NANOSCALE 2016; 8:826-34. [PMID: 26530472 DOI: 10.1039/c5nr05020k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Density functional theory calculations have been performed to study the experimentally synthesized Au30S(SR)18 and two related Au30(SR)18 and Au30S2(SR)18 clusters. The patterns of thiolate ligands on the gold cores for the three thiolate-protected Au30 nanoclusters are on the basis of the "divide and protect" concept. A novel extended protecting motif with u3-S, S(Au2(SR)2)2AuSR, is discovered, which is termed the tridentate protecting motif. The Au cores of Au30S(SR)18, Au30(SR)18 and Au30S2(SR)18 clusters are Au17, Au20 and Au14, respectively. The superatom-network (SAN) model and the superatom complex (SAC) model are used to explain the chemical bonding patterns, which are verified by chemical bonding analysis based on the adaptive natural density partitioning (AdNDP) method and aromatic analysis on the basis of the nucleus-independent chemical shift (NICS) method. The Au17 core of the Au30S(SR)18 cluster can be viewed as a SAN of one Au6 superatom and four Au4 superatoms. The shape of the Au6 core is identical to that revealed in the recently synthesized Au18(SR)14 cluster. The Au20 core of the Au30(SR)18 cluster can be viewed as a SAN of two Au6 superatoms and four Au4 superatoms. The Au14 core of Au30S2(SR)18 can be regarded as a SAN of two pairs of two vertex-sharing Au4 superatoms. Meanwhile, the Au14 core is an 8e-superatom with 1S(2)1P(6) configuration. Our work may aid understanding and give new insights into the chemical synthesis of thiolate-protected Au clusters.
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Affiliation(s)
- Zhimei Tian
- Department of Chemistry, Anhui University, Hefei, Anhui 230601, China. and School of Chemistry and Materials Engineering, Fuyang Teachers College, Fuyang, Anhui 236037, China
| | - Longjiu Cheng
- Department of Chemistry, Anhui University, Hefei, Anhui 230601, China.
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25
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Mollenhauer D, Gaston N. Phosphine passivated gold clusters: how charge transfer affects electronic structure and stability. Phys Chem Chem Phys 2016; 18:29686-29697. [DOI: 10.1039/c6cp04562f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
First principle calculations of small charged phosphine ligand-protected gold clusters have been performed in order to understand the major factors determining stability, including its size, shape, and charge dependence.
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Affiliation(s)
- Doreen Mollenhauer
- Institute of Physical Chemistry
- Justus-Liebig-University Giessen
- Giessen
- Germany
| | - Nicola Gaston
- The MacDiarmid Institute for Advanced Materials and Nanotechnology
- Department of Physics
- The University of Auckland
- Auckland 1142
- New Zealand
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26
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Muniz-Miranda F, Presti D, Menziani MC, Pedone A. Electronic and optical properties of the Au22[1,8-bis(diphenylphosphino) octane]6 nanoclusters disclosed by DFT and TD-DFT calculations. Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1764-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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27
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Pichugina DA, Kuz'menko NE, Shestakov AF. Ligand-protected gold clusters: the structure, synthesis and applications. RUSSIAN CHEMICAL REVIEWS 2015. [DOI: 10.1070/rcr4493] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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28
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Fernando A, Weerawardene KLDM, Karimova NV, Aikens CM. Quantum Mechanical Studies of Large Metal, Metal Oxide, and Metal Chalcogenide Nanoparticles and Clusters. Chem Rev 2015; 115:6112-216. [PMID: 25898274 DOI: 10.1021/cr500506r] [Citation(s) in RCA: 217] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Amendra Fernando
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
| | | | - Natalia V Karimova
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
| | - Christine M Aikens
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
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29
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Chung LW, Sameera WMC, Ramozzi R, Page AJ, Hatanaka M, Petrova GP, Harris TV, Li X, Ke Z, Liu F, Li HB, Ding L, Morokuma K. The ONIOM Method and Its Applications. Chem Rev 2015; 115:5678-796. [PMID: 25853797 DOI: 10.1021/cr5004419] [Citation(s) in RCA: 734] [Impact Index Per Article: 81.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Lung Wa Chung
- †Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
| | - W M C Sameera
- ‡Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4 Takano Nishihiraki-cho, Sakyo, Kyoto 606-8103, Japan
| | - Romain Ramozzi
- ‡Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4 Takano Nishihiraki-cho, Sakyo, Kyoto 606-8103, Japan
| | - Alister J Page
- §Newcastle Institute for Energy and Resources, The University of Newcastle, Callaghan 2308, Australia
| | - Miho Hatanaka
- ‡Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4 Takano Nishihiraki-cho, Sakyo, Kyoto 606-8103, Japan
| | - Galina P Petrova
- ∥Faculty of Chemistry and Pharmacy, University of Sofia, Bulgaria Boulevard James Bourchier 1, 1164 Sofia, Bulgaria
| | - Travis V Harris
- ‡Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4 Takano Nishihiraki-cho, Sakyo, Kyoto 606-8103, Japan.,⊥Department of Chemistry, State University of New York at Oswego, Oswego, New York 13126, United States
| | - Xin Li
- #State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Zhuofeng Ke
- ∇School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Fengyi Liu
- ○Key Laboratory of Macromolecular Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, Shaanxi 710119, China
| | - Hai-Bei Li
- ■School of Ocean, Shandong University, Weihai 264209, China
| | - Lina Ding
- ▲School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan 450001, China
| | - Keiji Morokuma
- ‡Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4 Takano Nishihiraki-cho, Sakyo, Kyoto 606-8103, Japan
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30
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A comparative study between post-Hartree–Fock methods and density functional theory in closed-shell aurophilic attraction. COMPUT THEOR CHEM 2015. [DOI: 10.1016/j.comptc.2015.01.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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31
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Meng Q, May SP, Berry MT, Kilin DS. Time-resolved electronic and optical properties of a thiolate-protected Au38nanocluster. Mol Phys 2015. [DOI: 10.1080/00268976.2014.999838] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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32
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Optical Properties and Chirality. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/b978-0-08-100086-1.00009-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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33
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Johnson GE, Olivares A, Hill D, Laskin J. Cationic gold clusters ligated with differently substituted phosphines: effect of substitution on ligand reactivity and binding. Phys Chem Chem Phys 2015; 17:14636-46. [DOI: 10.1039/c5cp01686j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Loss of substituted phosphine ligands is strongly correlated with the electron donating ability of the phosphorous lone pair. The results indicate that the relative ligand binding energies increase in the order PMe3 < PPhMe2 < PPh2Me < PPh3 < PPh2Cy < PPhCy2 < PCy3.
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Affiliation(s)
- Grant E. Johnson
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Astrid Olivares
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
| | - David Hill
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Julia Laskin
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
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34
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Muniz-Miranda F, Menziani MC, Pedone A. DFT and TD-DFT Assessment of the Structural and Optoelectronic Properties of an Organic–Ag14 Nanocluster. J Phys Chem A 2014; 119:5088-98. [DOI: 10.1021/jp507679f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Francesco Muniz-Miranda
- Department
of Chemical and
Geological Sciences (DSCG), University of Modena and Reggio Emilia (UniMoRE), Via G. Campi 183, I-41125, Modena, Italy
| | - Maria Cristina Menziani
- Department
of Chemical and
Geological Sciences (DSCG), University of Modena and Reggio Emilia (UniMoRE), Via G. Campi 183, I-41125, Modena, Italy
| | - Alfonso Pedone
- Department
of Chemical and
Geological Sciences (DSCG), University of Modena and Reggio Emilia (UniMoRE), Via G. Campi 183, I-41125, Modena, Italy
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35
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Zeng C, Liu C, Chen Y, Rosi NL, Jin R. Gold–Thiolate Ring as a Protecting Motif in the Au20(SR)16 Nanocluster and Implications. J Am Chem Soc 2014; 136:11922-5. [DOI: 10.1021/ja506802n] [Citation(s) in RCA: 249] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Chenjie Zeng
- Department
of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Chong Liu
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, United States
| | - Yuxiang Chen
- Department
of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Nathaniel L. Rosi
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, United States
| | - Rongchao Jin
- Department
of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
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36
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Kulasekera E, Petrie S, Stranger R, Humphrey MG. DFT Calculation of Static First Hyperpolarizabilities and Linear Optical Properties of Metal Alkynyl Complexes. Organometallics 2014. [DOI: 10.1021/om500124c] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Erandi Kulasekera
- Research
School of Chemistry, Australian National University, Canberra, Australian Capital Territory 0200, Australia
| | - Simon Petrie
- Research
School of Chemistry, Australian National University, Canberra, Australian Capital Territory 0200, Australia
| | - Robert Stranger
- Research
School of Chemistry, Australian National University, Canberra, Australian Capital Territory 0200, Australia
| | - Mark G. Humphrey
- Research
School of Chemistry, Australian National University, Canberra, Australian Capital Territory 0200, Australia
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37
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Olivares A, Laskin J, Johnson GE. Investigating the Synthesis of Ligated Metal Clusters in Solution Using a Flow Reactor and Electrospray Ionization Mass Spectrometry. J Phys Chem A 2014; 118:8464-70. [DOI: 10.1021/jp501809r] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Astrid Olivares
- Department
of Chemistry, California Lutheran University, Thousand Oaks, California 91360, United States
| | - Julia Laskin
- Physical Sciences
Division, Pacific Northwest National Laboratory, P.O. Box 999, MSIN K8-88, Richland, Washington, 99352
| | - Grant E. Johnson
- Physical Sciences
Division, Pacific Northwest National Laboratory, P.O. Box 999, MSIN K8-88, Richland, Washington, 99352
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38
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Mollenhauer D, Gaston N. A balanced procedure for the treatment of cluster-ligand interactions on gold phosphine systems in catalysis. J Comput Chem 2014; 35:986-97. [DOI: 10.1002/jcc.23578] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Revised: 02/02/2014] [Accepted: 02/07/2014] [Indexed: 12/16/2022]
Affiliation(s)
- Doreen Mollenhauer
- Callaghan Innovation; 69 Gracefield Road, Lower Hutt 5010 Wellington New Zealand
- School of Chemical and Physical Sciences, The MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington; P.O. Box 600 6140 Wellington New Zealand
| | - Nicola Gaston
- School of Chemical and Physical Sciences, The MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington; P.O. Box 600 6140 Wellington New Zealand
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39
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Muniz-Miranda F, Menziani MC, Pedone A. On the opto-electronic properties of phosphine and thiolate-protected undecagold nanoclusters. Phys Chem Chem Phys 2014; 16:18749-58. [DOI: 10.1039/c4cp02506g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A schematic description of the UV-vis spectrum of Au11(PPh3)7Cl3 nanoclusters. Metal → metal transitions are ubiquitous, metal → ligand transitions appear above the visible threshold, while ligand → metal and ligand → ligand transitions are much rarer in the investigated range of energies.
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Affiliation(s)
- Francesco Muniz-Miranda
- University of Modena an Reggio Emilia (UniMoRE)
- Dept. of Chemical and Geological Sciences (DSCG)
- Modena, Italy
| | - Maria Cristina Menziani
- University of Modena an Reggio Emilia (UniMoRE)
- Dept. of Chemical and Geological Sciences (DSCG)
- Modena, Italy
| | - Alfonso Pedone
- University of Modena an Reggio Emilia (UniMoRE)
- Dept. of Chemical and Geological Sciences (DSCG)
- Modena, Italy
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40
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Johnson GE, Priest T, Laskin J. Size-dependent stability toward dissociation and ligand binding energies of phosphine ligated gold cluster ions. Chem Sci 2014. [DOI: 10.1039/c4sc00849a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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41
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Knoppe S, Malola S, Lehtovaara L, Bürgi T, Häkkinen H. Electronic structure and optical properties of the thiolate-protected Au28(SMe)20 cluster. J Phys Chem A 2013; 117:10526-33. [PMID: 24032562 DOI: 10.1021/jp407494v] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The recently reported crystal structure of the Au28(TBBT)20 cluster (TBBT: p-tert-butylbenzenethiolate) is analyzed with (time-dependent) density functional theory (TD-DFT). Bader charge analysis reveals a novel trimeric Au3(SR)4 binding motif. The cluster can be formulated as Au14(Au2(SR)3)4(Au3(SR)4)2. The electronic structure of the Au14(6+) core and the ligand-protected cluster were analyzed, and their stability can be explained by formation of distorted eight-electron superatoms. Optical absorption and circular dichroism (CD) spectra were calculated and compared to the experiment. Assignment of handedness of the intrinsically chiral cluster is possible.
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Affiliation(s)
- Stefan Knoppe
- Molecular Imaging and Photonics, Department of Chemistry, KU Leuven , Celestijnenlaan 200D, 3001 Heverlee, Belgium
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42
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Shichibu Y, Konishi K. Electronic Properties of [Core+exo]-type Gold Clusters: Factors Affecting the Unique Optical Transitions. Inorg Chem 2013; 52:6570-5. [PMID: 23679833 DOI: 10.1021/ic4005592] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yukatsu Shichibu
- Faculty of Environmental Earth Science, Hokkaido University, North 10 West 5, Sapporo 060-0810,
Japan
| | - Katsuaki Konishi
- Faculty of Environmental Earth Science, Hokkaido University, North 10 West 5, Sapporo 060-0810,
Japan
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43
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Aikens CM. Modelling small gold and silver nanoparticles with electronic structure methods. MOLECULAR SIMULATION 2012. [DOI: 10.1080/08927022.2012.671522] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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44
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Yan Y, Fang R, Geng Z, Wang Y, Liu S. Reaction mechanism and chemoselectivity of gold(I)-catalyzed cycloaddition of 1-(1-alkynyl) cyclopropyl ketones with nucleophiles to yield substituted furans. Sci China Chem 2012. [DOI: 10.1007/s11426-012-4573-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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