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Chiu TH, Liao JH, Silalahi RPB, Pillay MN, Liu CW. Hydride-doped coinage metal superatoms and their catalytic applications. NANOSCALE HORIZONS 2024; 9:675-692. [PMID: 38507282 DOI: 10.1039/d4nh00036f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
Superatomic constructs have been identified as a critical component of future technologies. The isolation of coinage metal superatoms relies on partially reducing metallic frameworks to accommodate the mixed valent state required to generate a superatom. Controlling this reduction requires careful consideration in reducing the agent, temperature, and the ligand that directs the self-assembly process. Hydride-based reducing agents dominate the synthetic wet chemical routes to coinage metal clusters. However, within this category, a unique subset of superatoms that retain a hydride/s within the nanocluster post-reduction have emerged. These stable constructs have only recently been characterized in the solid state and have highly unique structural features and properties. The difficulty in identifying the position of hydrides in electron-rich metallic constructs requires the combination and correlation of several analytical methods, including ESI-MS, NMR, SCXRD, and DFT. This text highlights the importance of NMR in detecting hydride environments in these superatomic systems. Added to the complexity of these systems is the dual nature of the hydride, which can act as metallic hydrogen in some cases, resulting in entirely different physical properties. This review includes all hydride-doped superatomic nanoclusters emphasizing synthesis, structure, and catalytic potential.
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Affiliation(s)
- Tzu-Hao Chiu
- Department of Chemistry, National Dong Hwa University, Hualien 97401, Taiwan, Republic of China.
| | - Jian-Hong Liao
- Department of Chemistry, National Dong Hwa University, Hualien 97401, Taiwan, Republic of China.
| | - Rhone P Brocha Silalahi
- Department of Chemistry, National Dong Hwa University, Hualien 97401, Taiwan, Republic of China.
| | - Michael N Pillay
- Department of Chemistry, National Dong Hwa University, Hualien 97401, Taiwan, Republic of China.
| | - C W Liu
- Department of Chemistry, National Dong Hwa University, Hualien 97401, Taiwan, Republic of China.
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Han SM, Song S, Yi H, Sim E, Lee D. Synthesis of RhH-doped Au-Ag alloy nanoclusters and dopant evolution. NANOSCALE 2024; 16:4851-4857. [PMID: 38314888 DOI: 10.1039/d3nr05654f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Doping atomically precise metal nanoclusters (NCs) with heterometals is a powerful method for tuning the physicochemical properties of the original NCs at the atomic level. While the heterometals incorporated into metal NCs are limited to group 10-12 metals with closed d-shells, the doping of open d-shell metals remains largely unexplored. Herein, we report the synthesis of Rh-doped Au-Ag alloy NCs by a metal-exchange reaction of [RhHAg24(SPhMe2)18]2- NCs with an Au-thiolate complex. Combined experimental and theoretical structural studies revealed that the synthesized product is a dianionic [RhHAuxAg24-x(SPhMe2)18]2- NC (x = 8-12), consisting of RhH dopant, Au-rich kernel, and Ag-thiolate staple motifs, with the superatomic 8-electron configuration (1S21P6). Under aerobic conditions, the synthesized NCs underwent kernel evolution to generate a 6-electron [RhAuxAg24-x(SPhMe2)18]1- NC (1S21P4), which was initiated by the desorption of hydride from the kernel. Structural analysis of the [RhHAuxAg24-x(SPhMe2)18]2- NC suggests that the kernel evolution is induced by the change in chemical bonds surrounding the hydride in the Au-rich kernel.
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Affiliation(s)
- Sang Myeong Han
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea.
| | - Suhwan Song
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea.
| | - Hanseok Yi
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea.
| | - Eunji Sim
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea.
| | - Dongil Lee
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea.
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Artem'ev AV, Liu CW. Recent progress in dichalcophosphate coinage metal clusters and superatoms. Chem Commun (Camb) 2023. [PMID: 37184074 DOI: 10.1039/d3cc01215h] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Atomically precise clusters of group 11 metals (Cu, Ag, and Au) attract considerable attention owing to their remarkable structure and fascinating properties. One of the unique subclasses of these clusters is based on dichalcophosphate ligands of [(RO)2PE2]- type (E = S or Se, and R = alkyl). These ligands successfully stabilise the most diverse Cu, Ag, and Au clusters and superatoms, spanning from simple ones to amazing assemblies featuring unusual structural and bonding patterns. It is noteworthy that such complicated clusters are assembled directly from cheap and simple reagents, metal(I) salts and dichalcophosphate anions. This reaction, when performed in the presence of a hydride or other anion sources, or foreign metal ions, results in hydrido- or anion-templated homo- or heteronuclear structures. In this feature article, we survey the recent advances in this exciting field, highlighting the powerful synthetic capabilities of the system "a metal(I) salt - [(RO)2PX2]- ligands - a templating anion or borohydride" as an inexhaustible platform for the creation of new atomically precise clusters, superatoms, and nanoalloys.
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Affiliation(s)
- Alexander V Artem'ev
- Nikolaev Institute of Inorganic Chemistry, SB RAS, 3, Acad. Lavrentiev Ave., Novosibirsk 630090, Russian Federation
| | - C W Liu
- National Dong Hwa University, Department of Chemistry, No. 1, Sec. 2, Da Hsueh Rd. Shoufeng, Hualien 97401, Taiwan, Republic of China.
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Jia T, Guan ZJ, Zhang C, Zhu XZ, Chen YX, Zhang Q, Yang Y, Sun D. Eight-Electron Superatomic Cu 31 Nanocluster with Chiral Kernel and NIR-II Emission. J Am Chem Soc 2023; 145:10355-10363. [PMID: 37104621 DOI: 10.1021/jacs.3c02215] [Citation(s) in RCA: 29] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
Owing to the inherent instability caused by the low Cu(I)/Cu(0) half-cell reduction potential, Cu(0)-containing copper nanoclusters are quite uncommon in comparison to their Ag and Au congeners. Here, a novel eight-electron superatomic copper nanocluster [Cu31(4-MeO-PhC≡C)21(dppe)3](ClO4)2 (Cu31, dppe = 1,2-bis(diphenylphosphino)ethane) is presented with total structural characterization. The structural determination reveals that Cu31 features an inherent chiral metal core arising from the helical arrangement of two sets of three Cu2 units encircling the icosahedral Cu13 core, which is further shielded by 4-MeO-PhC≡C- and dppe ligands. Cu31 is the first copper nanocluster carrying eight free electrons, which is further corroborated by electrospray ionization mass spectrometry, X-ray photoelectron spectroscopy and density functional theory calculations. Interestingly, Cu31 demonstrates the first near-infrared (750-950 nm, NIR-I) window absorption and the second near-infrared (1000-1700 nm, NIR-II) window emission, which is exceptional in the copper nanocluster family and endows it with great potential in biological applications. Of note, the 4-methoxy groups providing close contacts with neighboring clusters are crucial for the cluster formation and crystallization, while 2-methoxyphenylacetylene leads only to copper hydride clusters, Cu6H or Cu32H14. This research not only showcases a new member of copper superatoms but also exemplifies that copper nanoclusters, which are nonluminous in the visible range may emit luminescence in the deep NIR region.
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Affiliation(s)
- Tao Jia
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China
| | - Zong-Jie Guan
- College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Chengkai Zhang
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China
| | - Xiao-Zhao Zhu
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China
| | - Yun-Xin Chen
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China
| | - Qian Zhang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China
| | - Yang Yang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China
| | - Di Sun
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China
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Silalahi RPB, Liao JH, Tseng YF, Chiu TH, Kahlal S, Saillard JY, Liu CW. Unusual core engineering on a copper hydride nanoball. Dalton Trans 2023; 52:2106-2114. [PMID: 36722491 DOI: 10.1039/d2dt03449b] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A neutral polyhydrido copper cluster, [Cu27H15{S2CNnBu2}12] (abbreviated as [Cu27H15]), was prepared by the reaction of dithiocarbamates (dtc), Cu(I) salts and NaBH4. The isolated cluster provides insights into core engineering, demonstrating its novel ability to reversibly add or remove one copper atom from the cluster core. Single-crystal X-ray analysis reveals that the new core-shell structure exhibits a Cu24 rhombicuboctahedral outer cage and an inner Cu3 triangular kernel. The two core-shell clusters, [Cu27H15{S2CNnBu2}12] and previously published [Cu28H15(S2CNnBu2)12]+ (abbreviated as [Cu28H15]+), are only differentiated by one copper atom in their inner core. Importantly, we demonstrate core engineering with the controllable reversible transition between an irregular Cu4 tetrahedron and a Cu3 triangle, whilst maintaining their outer Cu24 shell intact. The 15 hydride atoms in [Cu27H15], coordinated in three different modes, are co-incident with the hydride positions in [Cu28H15]+. The degradation of [Cu27H15] in solution or the addition of one eq. of Cu(I) ions leads to the conversion of [Cu27H15] into [Cu28H15]+, while the reverse transformation can be achieved by the addition of either formic acid or a reducing agent to [Cu28H15]+. A dicationic species was observed in the ESI mass spectrum, and the composition is formulated as [Cu56H30(S2CNnBu2)24]2+, a dimer of [Cu27H15(S2CNnBu2)12 + Cu+]22+. The dimeric species was further explored by DFT calculations, suggesting that the lowest energy structure consists of a [Cu28H15]+ and a [Cu27H15] cluster connected through one Cu+ atom bridge. As a result, [Cu27H15] is considered an intermediate species in the formation of the more stable [Cu28H15]+ nanoball.
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Affiliation(s)
- Rhone P Brocha Silalahi
- Department of Chemistry, National Dong Hwa University, Hualien 974301, Taiwan, Republic of China.
| | - Jian-Hong Liao
- Department of Chemistry, National Dong Hwa University, Hualien 974301, Taiwan, Republic of China.
| | - Yu-Fang Tseng
- Department of Chemistry, National Dong Hwa University, Hualien 974301, Taiwan, Republic of China.
| | - Tzu-Hao Chiu
- Department of Chemistry, National Dong Hwa University, Hualien 974301, Taiwan, Republic of China.
| | - Samia Kahlal
- Univ Rennes, CNRS, ISCR-UMR 6226, F-35000 Rennes, France.
| | | | - C W Liu
- Department of Chemistry, National Dong Hwa University, Hualien 974301, Taiwan, Republic of China.
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Zhu XZ, Jia T, Guan ZJ, Zhang Q, Yang Y. Elongation of a Trigonal-Prismatic Copper Cluster by Diphosphine Ligands with Longer Spacers. Inorg Chem 2022; 61:15144-15151. [DOI: 10.1021/acs.inorgchem.2c02306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiao-Zhao Zhu
- School of Chemistry and Materials Science, Jiangsu Normal University, Jiangsu 221008, China
| | - Tao Jia
- School of Chemistry and Materials Science, Jiangsu Normal University, Jiangsu 221008, China
| | - Zong-Jie Guan
- College of Chemistry and Chemical Engineering, Hunan University, Hunan 410012, China
| | - Qian Zhang
- School of Chemistry and Materials Science, Jiangsu Normal University, Jiangsu 221008, China
| | - Yang Yang
- School of Chemistry and Materials Science, Jiangsu Normal University, Jiangsu 221008, China
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Heptanuclear Silver Hydride Clusters as Catalytic Precursors for the Reduction of 4-Nitrophenol. Molecules 2022; 27:molecules27165223. [PMID: 36014476 PMCID: PMC9415167 DOI: 10.3390/molecules27165223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 08/03/2022] [Accepted: 08/11/2022] [Indexed: 11/17/2022] Open
Abstract
We report on the design, synthesis, and characterization of the first silver hydride clusters solely protected and stabilized by dithiophosphonate ligands and their application for the in situ generation of silver nanoparticles towards the catalytic reduction of 4-nitrophenol in an aqueous system. The synthesis of the silver monohydride cluster involves the incorporation of an interstitial hydride using sodium borohydride. Poly-nuclear magnetic resonance and mass spectrometry were used to establish the structural properties. The structural properties were then confirmed with a single-crystal X-ray diffraction analysis, which showed a distorted tetracapped tetrahedron core with one hydride ion encapsulated within the core of the silver framework. Additionally, the synthesized heptanuclear silver hydride was utilized as a precursor for the in situ generation of silver nanoparticles, which simultaneously catalyzed the reduction of 4-nitrophenol. The mechanism of the catalytic activity was investigated by first synthesizing AgNPs, which was subsequently used as a catalyst. The kinetic study showed that the pseudo-first constant obtained using the cluster (2.43 × 10−2 s−1) was higher than that obtained using the synthesized AgNPs (2.43 × 10−2 s−1). This indicated that the silver monohydride cluster was more active owing to the release of the encapsulated hydride ion and greater reaction surface prior to aggregation.
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Chiu TH, Liao JH, Gam F, Wu YY, Wang X, Kahlal S, Saillard JY, Liu CW. Hydride-Containing Eight-Electron Pt/Ag Superatoms: Structure, Bonding, and Multi-NMR Studies. J Am Chem Soc 2022; 144:10599-10607. [PMID: 35654753 DOI: 10.1021/jacs.2c03715] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Recent reports on hydride-doped noble metal nanoclusters strongly suggest that the encapsulated hydride is a part of the superatom core, but no accurate location of the hydride could be experimentally proved, so far. We report herein a hydride-doped eight-electron platinum/silver alloy nanocluster in which the position of four-coordinated hydride was determined by neutron diffraction for the first time. X-ray structures of [PtHAg19(dtp/desp)12] (dtp = S2P(OnPr)2, 1; dsep = Se2P(OiPr)2, 2) describe a central platinum hydride (PtH) unit encapsulated within a distorted Ag12 icosahedron, the resulting (PtH)@Ag12 core being stabilized by an outer sphere made up of 7 capping silver atoms and 12 dichalcogenolates. Solid-state structures of 1 and 2 differ somewhat in the spatial configuration of their outer spheres, resulting in overall different symmetries, C1 and C3, respectively. Whereas the multi-NMR spectra of 2 in solution at 173 K reveal that the structure of C3 symmetry is the predominant one, 1H and 195Pt NMR spectra of 1 at the same temperature disclose the presence of isomers of both C1 and C3 symmetry. DFT calculations found both isomers to be very close in energy, supporting the fact that they co-exist in solution. They also show that the [PtH@Ag12]5+ kernel can be viewed as a closed-shell superatomic core, the μ4-hydride electron contributing to its eight-electron count. On the other hand, the 1s(H) orbital contributes only moderately to the superatomic orbitals, being mainly involved in the building of a Pt-H bonding electron pair with the 5dz2(Pt) orbital.
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Affiliation(s)
- Tzu-Hao Chiu
- Department of Chemistry, National Dong Hwa University, Hualien 974301, Taiwan (Republic of China)
| | - Jian-Hong Liao
- Department of Chemistry, National Dong Hwa University, Hualien 974301, Taiwan (Republic of China)
| | - Franck Gam
- CNRS, ISCR-UMR 6226, Univ Rennes, Rennes F-35000, France
| | - Ying-Yann Wu
- Institute of Chemistry, Academia Sinica, Taipei 11528, Taiwan (Republic of China)
| | - Xiaoping Wang
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Samia Kahlal
- CNRS, ISCR-UMR 6226, Univ Rennes, Rennes F-35000, France
| | | | - C W Liu
- Department of Chemistry, National Dong Hwa University, Hualien 974301, Taiwan (Republic of China)
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