1
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Kumari N, Mahata A, Chakraborty B. Immobilization of Phosphamide on the TiO 2 Surface for Heterogeneous Phase Catalytic Appel Reaction. Inorg Chem 2023; 62:7728-7737. [PMID: 37148267 DOI: 10.1021/acs.inorgchem.3c00304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Global consumption of triphenylphosphine (Ph3P) for phosphorus-mediated organic synthesis and production of the dead-end triphenylphosphine oxide (Ph3PO) waste is exceptionally high. Recycling Ph3PO and/or use of it as a reaction mediator gained significant attention. On the other end, phosphamides, traditionally used as a flame redundant, are stable analogues to Ph3PO. Herein, via a low temperature condensation reaction of methyl 4-(aminomethyl)benzoate (AMB) and diphenyl phosphinic chloride (DPPC), methyl 4-((N,N-diphenylphosphinamido)methyl)benzoate (1) has been synthesized and hydrolysis of the ester functional group of 1 leads to a phosphamide with a carboxylate terminal, 4-((N,N-diphenylphosphinamido)methyl)benzoic acid (2). The presence of phosphamide functionality (NH─P═O) in 2 can be confirmed by its characteristic Raman vibration at 999 cm-1 with expected P-N and P═O bonds distances from the single-crystal X-ray structure. In-situ hydrolysis of [Ti(OiPr)4] in the presence of 2 followed by hydrothermal heating results in immobilization of 2 on a ca. 5 nm TiO2 surface (2@TiO2). The covalent attachment of 2 via coordination through the carboxylate terminal to the TiO2 nanocrystal's surface has been established via multiple spectroscopic and microscopic studies. 2@TiO2 is further used as the heterogeneous mediator for the catalytic Appel reaction, halogenation of alcohol (typically mediated by phosphine), with a fair catalytic conversion and a recorded TON up to 31. The major advantage of the heterogeneous approach studied herein is the recovery of used 2@TiO2 from the reaction mixture via centrifugation only leaving the organic product in the supernatant, which is limiting in Ph3P-mediated homogeneous catalysis. Time-resolved Raman spectroscopy confirms amino phosphine as the active species formed in-situ during the catalytic Appel reaction. Post-catalytic characterization of the material recovered after catalysis from the reaction mixture confirms the chemical integrity and that can further be utilized for another two catalytic runs. The developed reaction scheme showcases the use of a phosphamide as a reactive analogue to Ph3PO for an organic reaction in a heterogeneous approach, and the same strategy can be explored further as a general scheme for other phosphorus-mediated reactions.
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Affiliation(s)
- Nidhi Kumari
- Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India
| | - Anup Mahata
- Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India
| | - Biswarup Chakraborty
- Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India
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2
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Kumar Tiwari C, Roy S, Tubul-Sterin T, Baranov M, Leffler N, Li M, Yin P, Neyman A, Weinstock IA. Emergence of Visible-Light Water Oxidation Upon Hexaniobate-Ligand Entrapment of Quantum-Confined Copper-Oxide Cores. Angew Chem Int Ed Engl 2023; 62:e202213762. [PMID: 36580402 DOI: 10.1002/anie.202213762] [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: 09/19/2022] [Revised: 12/22/2022] [Accepted: 12/23/2022] [Indexed: 12/30/2022]
Abstract
The formation of small 1 to 3 nm organic-ligand free metal-oxide nanocrystals (NCs) is essential to utilization of their attractive size-dependent properties in electronic devices and catalysis. We now report that hexaniobate cluster-anions, [Nb6 O19 ]8- , can arrest the growth of metal-oxide NCs and stabilize them as water-soluble complexes. This is exemplified by formation of hexaniobate-complexed 2.4-nm monoclinic-phase CuO NCs (1), whose ca. 350 Cu-atom cores feature quantum-confinement effects that impart an unprecedented ability to catalyze visible-light water oxidation with no added photosensitizers or applied potentials, and at rates exceeding those of hematite NCs. The findings point to polyoxoniobate-ligand entrapment as a potentially general method for harnessing the size-dependent properties of very small semiconductor NCs as the cores of versatile, entirely-inorganic complexes.
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Affiliation(s)
- Chandan Kumar Tiwari
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
| | - Shubasis Roy
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
| | - Tal Tubul-Sterin
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
| | - Mark Baranov
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
| | - Nitai Leffler
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
| | - Mu Li
- South China Advanced Institute for Soft Matter Science and Technology & State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Panchao Yin
- South China Advanced Institute for Soft Matter Science and Technology & State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Alevtina Neyman
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
| | - Ira A Weinstock
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
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3
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Tubul-Sterin T, Baranov M, Gan-Or G, Leffler N, Neyman A, Weinstock IA. Polyoxometalate-Complexed Indium Hydroxide: Atomically Homogeneous Impregnation via Countercation Exchange. Inorg Chem 2023; 62:1804-1812. [PMID: 35312306 DOI: 10.1021/acs.inorgchem.1c03857] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Metal hydroxides catalyze organic transformations and photochemical processes and serve as precursors for the oxide layers of functional multicomponent devices. However, no general methods are available for the preparation of stable water-soluble complexes of metal hydroxide nanocrystals (NCs) that might be more effective in catalysis and serve as versatile precursors for the reproducible fabrication of multicomponent devices. We now report that InIII-substituted monodefect Wells-Dawson (WD) polyoxometalate (POM) cluster anions, [α2-P2W17O61InIIIOH)]8-, serve as ligands for stable, water-soluble complexes, 1, of platelike, predominantly cubic-phase (dzhalindite) In(OH)3 NCs that after optimization contain ca. 10% InOOH. Images from cryogenic tranmsission electron microscopy reveal numerous WD ligands at the surfaces of platelike NCs, with average dimensions of 17 × 28 × 2 nm, each complexed by an average of ca. 450 InIII-substituted WD cluster anions and charge-balanced by 3600 Na+ countercations. Facilitated by the water solubility of 1, countercation exchange is used to stoichiometrically disperse ca. 1800 Cu2+ ions in an atomically homogeneous fashion around the surfaces of each NC core. The utility of this impregnation method is illustrated by using the ion-exchanged material as an electrocatalyst that reduces CO2 to CO 15 times faster per milligram of Cu than does K6Cu[P2CuII(H2O)W17O61] (control) alone. More generally, the findings point to POM complexation as a promising method for stabilizing and solubilizing reactive d-, p-, and f-block metal hydroxide NCs and for enabling their utilization as versatile components in the fabrication of functional multicomponent materials.
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Affiliation(s)
- Tal Tubul-Sterin
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Mark Baranov
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Gal Gan-Or
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Nitai Leffler
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Alevtina Neyman
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Ira A Weinstock
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
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4
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Xia K, Yamaguchi K, Suzuki K. Recent Advances in Hybrid Materials of Metal Nanoparticles and Polyoxometalates. Angew Chem Int Ed Engl 2023; 62:e202214506. [PMID: 36282183 DOI: 10.1002/anie.202214506] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Indexed: 11/25/2022]
Abstract
Polyoxometalates (POMs), anionic metal-oxygen nanoclusters that possess various composition-dependent properties, are widely used to modify the existing properties of metal nanoparticles and to endow them with new ones. Herein, we present an overview of recent advances in hybrid materials that consist of metal nanoparticles and POMs. Following a brief introduction on the inception of this area and its development, representative properties and applications of these materials in various fields such as electrochemistry, photochemistry, and catalysis are introduced. We discuss how the combination of two classic inorganic materials facilitates cooperative and synergistic behavior, and we also give personal perspectives on the future development of this field.
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Affiliation(s)
- Kang Xia
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Kazuya Yamaguchi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Kosuke Suzuki
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
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5
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Wu Y, Chen S, Bai C, Niu S, Wei W. Spatially Guided Assembly of Polyoxometalate Superlattices and Their Derivatives as High-Power Sodium-Ion Battery Anodes. ACS NANO 2022; 16:21431-21442. [PMID: 36469452 DOI: 10.1021/acsnano.2c09796] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The use of polyoxometalate clusters (POMs) with multitudinous structures and surface properties as building blocks has sparked the development of cluster-assembled materials with many prospective applications. In comparison to classic molecules and assembly processes, control over the steric interactions and linkage of large POMs to achieve superlattices with multiple levels of organization remains a great challenge. This work presents a universal approach to modulate the spatial coordination behavior and configurations, and achieves a class of cluster superlattice architectures formed by linear alignment and two-dimensional arrangement of POM units. The formation mechanism is explained as a stepwise co-assembly pathway in which POMs can intervene and dictate a typical stripping-restacking combination mode with the lamellar mediator. These cluster superlattices with long-range POMs ordering impart distinct merits to their derivatives by sulfuration, for which we demonstrate the substantially promoted power and cycling life of these POM derivatives applied as sodium-ion battery anodes.
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Affiliation(s)
- Yunping Wu
- Department of Applied Chemistry, School of Chemistry, Xi'an Jiaotong University, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an710049, P. R. China
| | - Sheng Chen
- Department of Applied Chemistry, School of Chemistry, Xi'an Jiaotong University, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an710049, P. R. China
| | - Caihe Bai
- Department of Applied Chemistry, School of Chemistry, Xi'an Jiaotong University, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an710049, P. R. China
| | - Shuwen Niu
- Department of Applied Chemistry, School of Chemistry, Xi'an Jiaotong University, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an710049, P. R. China
| | - Wei Wei
- Department of Applied Chemistry, School of Chemistry, Xi'an Jiaotong University, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an710049, P. R. China
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6
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Zhang G, Wang F, Tubul T, Baranov M, Leffler N, Neyman A, Poblet JM, Weinstock IA. Complexed Semiconductor Cores Activate Hexaniobate Ligands as Nucleophilic Sites for Solar‐Light Reduction of CO
2
by Water. Angew Chem Int Ed Engl 2022; 61:e202213162. [PMID: 36200676 PMCID: PMC10098893 DOI: 10.1002/anie.202213162] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Indexed: 11/06/2022]
Abstract
Although pure and functionalized solid-state polyniobates such as layered perovskites and niobate nanosheets are photocatalysts for renewable-energy processes, analogous reactions by molecular polyoxoniobate cluster-anions are nearly absent from the literature. We now report that under simulated solar light, hexaniobate cluster-anion encapsulated 30-NiII -ion "fragments" of surface-protonated cubic-phase-like NiO cores activate the hexaniobate ligands towards CO2 reduction by water. Photoexcitation of the NiO cores promotes charge-transfer reduction of NbV to NbIV , increasing electron density at bridging oxo atoms of Nb-μ-O-Nb linkages that bind and convert CO2 to CO. Photogenerated NiO "holes" simultaneously oxidize water to dioxygen. The findings point to molecular complexation of suitable semiconductor "fragments" as a general method for utilizing electron-dense polyoxoniobate anions as nucleophilic photocatalysts for solar-light driven activation and reduction of small molecules.
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Affiliation(s)
- Guanyun Zhang
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & TechnologyBen-Gurion University of the NegevBeer Sheva84105Israel
- Key Lab for Colloid and Interface Science of Ministry of EducationSchool of Chemistry and Chemical EngineeringShandong UniversityJinan250100China
| | - Fei Wang
- Departament de Química Física i InorgànicaUniversitat Rovira i Virgili43007TarragonaSpain
| | - Tal Tubul
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & TechnologyBen-Gurion University of the NegevBeer Sheva84105Israel
| | - Mark Baranov
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & TechnologyBen-Gurion University of the NegevBeer Sheva84105Israel
| | - Nitai Leffler
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & TechnologyBen-Gurion University of the NegevBeer Sheva84105Israel
| | - Alevtina Neyman
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & TechnologyBen-Gurion University of the NegevBeer Sheva84105Israel
| | - Josep M. Poblet
- Departament de Química Física i InorgànicaUniversitat Rovira i Virgili43007TarragonaSpain
| | - Ira A. Weinstock
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & TechnologyBen-Gurion University of the NegevBeer Sheva84105Israel
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7
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Nandan SP, Gumerova NI, Schubert JS, Saito H, Rompel A, Cherevan A, Eder D. Immobilization of a [Co IIICo II(H 2O)W 11O 39] 7– Polyoxoanion for the Photocatalytic Oxygen Evolution Reaction. ACS MATERIALS AU 2022; 2:505-515. [PMID: 35856075 PMCID: PMC9284608 DOI: 10.1021/acsmaterialsau.2c00025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
The ongoing transition
to renewable energy sources and the implementation
of artificial photosynthetic setups call for an efficient and stable
water oxidation catalyst (WOC). Here, we heterogenize a molecular
all-inorganic [CoIIICoII(H2O)W11O39]7– ({CoIIICoIIW11}) Keggin-type polyoxometalate (POM) onto a
model TiO2 surface, employing a 3-aminopropyltriethoxysilane
(APTES) linker to form a novel heterogeneous photosystem for light-driven
water oxidation. The {CoIIICoIIW11}-APTES-TiO2 hybrid is characterized using a set of spectroscopic
and microscopic techniques to reveal the POM integrity and dispersion
to elucidate the POM/APTES and APTES/TiO2 binding modes
as well as to visualize the attachment of individual clusters. We
conduct photocatalytic studies under heterogeneous and homogeneous
conditions and show that {CoIIICoIIW11}-APTES-TiO2 performs as an active light-driven WOC, wherein
{CoIIICoIIW11} acts as a stable co-catalyst
for water oxidation. In contrast to the homogeneous WOC performance
of this POM, the heterogenized photosystem yields a constant WOC rate
for at least 10 h without any apparent deactivation, demonstrating
that TiO2 not only stabilizes the POM but also acts as
a photosensitizer. Complementary studies using photoluminescence (PL)
emission spectroscopy elucidate the charge transfer mechanism and
enhanced WOC activity. The {CoIIICoIIW11}-APTES-TiO2 photocatalyst serves as a prime example of
a hybrid homogeneous–heterogeneous photosystem that combines
the advantages of solid-state absorbers and well-defined molecular
co-catalysts, which will be of interest to both scientific communities
and applications in photoelectrocatalysis and CO2 reduction.
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Affiliation(s)
- Sreejith P. Nandan
- Institute of Materials Chemistry, TU Wien, Getreidemarkt 9/BC/02, 1060 Vienna, Austria
| | - Nadiia I. Gumerova
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstraße 14, 1090 Vienna, Austria
| | - Jasmin S. Schubert
- Institute of Materials Chemistry, TU Wien, Getreidemarkt 9/BC/02, 1060 Vienna, Austria
| | - Hikaru Saito
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - Annette Rompel
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstraße 14, 1090 Vienna, Austria
| | - Alexey Cherevan
- Institute of Materials Chemistry, TU Wien, Getreidemarkt 9/BC/02, 1060 Vienna, Austria
| | - Dominik Eder
- Institute of Materials Chemistry, TU Wien, Getreidemarkt 9/BC/02, 1060 Vienna, Austria
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8
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Wang W, Zhang M, Pan Z, Biesold GM, Liang S, Rao H, Lin Z, Zhong X. Colloidal Inorganic Ligand-Capped Nanocrystals: Fundamentals, Status, and Insights into Advanced Functional Nanodevices. Chem Rev 2021; 122:4091-4162. [PMID: 34968050 DOI: 10.1021/acs.chemrev.1c00478] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Colloidal nanocrystals (NCs) are intriguing building blocks for assembling various functional thin films and devices. The electronic, optoelectronic, and thermoelectric applications of solution-processed, inorganic ligand (IL)-capped colloidal NCs are especially promising as the performance of related devices can substantially outperform their organic ligand-capped counterparts. This in turn highlights the significance of preparing IL-capped NC dispersions. The replacement of initial bulky and insulating ligands capped on NCs with short and conductive inorganic ones is a critical step in solution-phase ligand exchange for preparing IL-capped NCs. Solution-phase ligand exchange is extremely appealing due to the highly concentrated NC inks with completed ligand exchange and homogeneous ligand coverage on the NC surface. In this review, the state-of-the-art of IL-capped NCs derived from solution-phase inorganic ligand exchange (SPILE) reactions are comprehensively reviewed. First, a general overview of the development and recent advancements of the synthesis of IL-capped colloidal NCs, mechanisms of SPILE, elementary reaction principles, surface chemistry, and advanced characterizations is provided. Second, a series of important factors in the SPILE process are offered, followed by an illustration of how properties of NC dispersions evolve after ILE. Third, surface modifications of perovskite NCs with use of inorganic reagents are overviewed. They are necessary because perovskite NCs cannot withstand polar solvents or undergo SPILE due to their soft ionic nature. Fourth, an overview of the research progresses in utilizing IL-capped NCs for a wide range of applications is presented, including NC synthesis, NC solid and film fabrication techniques, field effect transistors, photodetectors, photovoltaic devices, thermoelectric, and photoelectrocatalytic materials. Finally, the review concludes by outlining the remaining challenges in this field and proposing promising directions to further promote the development of IL-capped NCs in practical application in the future.
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Affiliation(s)
- Wenran Wang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, 483 Wushan Road, Guangzhou 510642, China.,School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
| | - Meng Zhang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Zhenxiao Pan
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, 483 Wushan Road, Guangzhou 510642, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
| | - Gill M Biesold
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Shuang Liang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Huashang Rao
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, 483 Wushan Road, Guangzhou 510642, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Xinhua Zhong
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, 483 Wushan Road, Guangzhou 510642, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
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9
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Zhang G, Baranov M, Wang F, Poblet JM, Kozuch S, Leffler N, Shames AI, Clemente-Juan JM, Neyman A, Weinstock IA. Soluble Complexes of Cobalt Oxide Fragments Bring the Unique CO 2 Photoreduction Activity of a Bulk Material into the Flexible Domain of Molecular Science. J Am Chem Soc 2021; 143:20769-20778. [PMID: 34854676 DOI: 10.1021/jacs.1c08817] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The deposition of metal oxides is essential to the fabrication of numerous multicomponent solid-state devices and catalysts. However, the reproducible formation of homogeneous metal oxide films or of nanoparticle dispersions at solid interfaces remains an ongoing challenge. Here we report that molecular hexaniobate cluster anion complexes of structurally and electronically distinct fragments of cubic-spinel and monoclinic Co3O4 can serve as tractable yet well-defined functional analogues of bulk cobalt oxide. Notably, the energies of the highest-occupied and lowest-unoccupied molecular orbitals (HOMO and LUMO) of the molecular complexes, 1, closely match the valence- and conduction-band (VB and CB) energies of the parent bulk oxides. Use of 1 as a molecular analogue of the parent oxides is demonstrated by its remarkably simple deployment as a cocatalyst for direct Z-scheme reduction of CO2 by solar light and water. Namely, evaporation of an aqueous solution of 1 on TiO2-coated fluorinated tin oxide windows (TiO2/FTO), immersion in wet acetonitrile, and irradiation by simulated solar light under an atmosphere of CO2 give H2, CO, and CH4 in ratios nearly identical to those obtained using 20 nm spinel-Co3O4 nanocrystals, but 15 times more rapidly on a Co basis and more rapidly overall than other reported systems. Detailed investigation of the photocatalytic properties of 1 on TiO2/FTO includes confirmation of a direct Z-scheme charge-carrier migration pathway by in situ irradiated X-ray photoelectron spectroscopy. More generally, the findings point to a potentially important new role for coordination chemistry that bridges the conceptual divide between molecular and solid-state science.
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Affiliation(s)
- Guanyun Zhang
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Mark Baranov
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Fei Wang
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Josep M Poblet
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Sebastian Kozuch
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Nitai Leffler
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Alexander I Shames
- Department of Physics, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Juan M Clemente-Juan
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, 46980 Paterna, Spain
| | - Alevtina Neyman
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Ira A Weinstock
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
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10
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Duan Y, Chakraborty B, Tiwari CK, Baranov M, Tubul T, Leffler N, Neyman A, Weinstock IA. Solution-State Catalysis of Visible Light-Driven Water Oxidation by Macroanion-Like Inorganic Complexes of γ-FeOOH Nanocrystals. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02824] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Yan Duan
- Department of Chemistry, Ben Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology, Beer Sheva 84105, Israel
| | - Biswarup Chakraborty
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Chandan Kumar Tiwari
- Department of Chemistry, Ben Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology, Beer Sheva 84105, Israel
| | - Mark Baranov
- Department of Chemistry, Ben Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology, Beer Sheva 84105, Israel
| | - Tal Tubul
- Department of Chemistry, Ben Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology, Beer Sheva 84105, Israel
| | - Nitai Leffler
- Department of Chemistry, Ben Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology, Beer Sheva 84105, Israel
| | - Alevtina Neyman
- Department of Chemistry, Ben Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology, Beer Sheva 84105, Israel
| | - Ira A. Weinstock
- Department of Chemistry, Ben Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology, Beer Sheva 84105, Israel
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11
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Yan B, Liang R, Zheng K, Li R, Ma P, Wang J, Niu J. Multinuclear Lanthanide-Implanted Tetrameric Dawson-Type Phosphotungstates with Switchable Luminescence Behaviors Induced by Fast Photochromism. Inorg Chem 2021; 60:8164-8172. [PMID: 34014645 DOI: 10.1021/acs.inorgchem.1c00798] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of benzoate-decorated lanthanide (Ln)-containing tetrameric Dawson-type phosphotungstates [N(CH3)4]6H20[{(P2W17O61)Ln(H2O)3Ln(C6H5COO)(H2O)6]}{[(P2W17O61)Ln(H2O)3}]2Cl2·98H2O [Ln = Sm (1), Eu (2), and Gd (3)] were made using a facile one-step assembly strategy and characterized by several techniques. Notably, the Ln-containing tetrameric Dawson-type polyoxoanions [{(P2W17O61)Ln(H2O)3Ln(C6H5COO)(H2O)6]}{[(P2W17O61)Ln(H2O)3}]224- are all established by four monolacunary Dawson-type [P2W17O61]10- segments, encapsulating a Ln3+ ion with two benzoates coordinating to the Ln3+ ions. 1-3 exhibit reversible photochromism, which can change from intrinsic white to blue for 6 min upon UV irradiation, and their colors gradually recover for 30 h in the dark. The solid-state photoluminescence spectra of 1 and 2 display characteristic emissions of Ln components based on 4f-4f transitions. Time-resolved emission spectra of 1 and 2 were also measured to authenticate the energy transfer from the phosphotungstate and organic chromophores to Eu3+. In particular, 1 shows an effectively switchable luminescence behavior induced by its fast photochromism.
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Affiliation(s)
- Bing Yan
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Rongchang Liang
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Kangting Zheng
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Rui Li
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Pengtao Ma
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Jingping Wang
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Jingyang Niu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
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12
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Xu X, Liu X, Wang D, Liu X, Chen L, Zhao J. {HPO 3} and {WO 4} Simultaneously Induce the Assembly of Tri-Ln(III)-Incorporated Antimonotungstates and Their Photoluminescence Behaviors. Inorg Chem 2021; 60:1037-1044. [PMID: 33382601 DOI: 10.1021/acs.inorgchem.0c03148] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A double template agent strategy has been adopted to prepare a group of triacetate-adorned tri-Ln(III)-incorporated trimeric antimonotungstates (AMTs) K3Na21H[Ln3(CH3COO)3(HPO3)(WO4)][B-α-SbW9O33]3·36H2O [Ln = Eu3+ (1), Dy3+ (2), Ho3+ (3), or Er3+ (4)] in a CH3COOH-CH3COONa buffer system. Therein, H3PO3 and Na2WO4·2H2O have been, respectively, transformed into the capped {HPO3} and {WO4} tetrahedra during the assembly process, which are situated at the center of polyoxoanions of 1-4 and simultaneously perform as structure-directing templates to induce the assembly of 1-4. The hexahedral configuration supramolecular stacking is the same as the shape of a crystal of 1, which illustrates that the supramolecular stacking mode plays a significant role in forming the crystal shape of 1-4. Under the Ln3+ f-f excitation, the photoluminescence behaviors involving the emission spectrograms and fluorescence decay curves of 1-4 were systematically researched. The modulation of the excitation wavelength has realized the emission color tuning from blue to red, blue to green, blue to yellow, and green to yellow for 1-4. On the basis of the excitation of O → W charge transfer (OWCT), the energy-transfer procedure from AMT units to Eu3+ centers in 1 is mainly accomplished in the form of energy reabsorption. This work proposes a typical case for the construction of a new type of AMT clusters by using the double template agent strategy and confirms the great potential of Ln-containing AMTs in optic applications.
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Affiliation(s)
- Xin Xu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Xiaoyi Liu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Dan Wang
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Xuejun Liu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Lijuan Chen
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Junwei Zhao
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
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13
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Laurans M, Trinh K, Dalla Francesca K, Izzet G, Alves S, Derat E, Humblot V, Pluchery O, Vuillaume D, Lenfant S, Volatron F, Proust A. Covalent Grafting of Polyoxometalate Hybrids onto Flat Silicon/Silicon Oxide: Insights from POMs Layers on Oxides. ACS APPLIED MATERIALS & INTERFACES 2020; 12:48109-48123. [PMID: 32986397 DOI: 10.1021/acsami.0c12300] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Immobilization of polyoxometalates (POMs) onto oxides is relevant to many applications in the fields of catalysis, energy conversion/storage, or molecular electronics. Optimization and understanding the molecule/oxide interface is crucial to rationally improve the performance of the final molecular materials. We herein describe the synthesis and covalent grafting of POM hybrids with remote carboxylic acid functions onto flat Si/SiO2 substrates. Special attention has been paid to the characterization of the molecular layer and to the description of the POM anchoring mode at the oxide interface through the use of various characterization techniques, including ellipsometry, AFM, XPS, and FTIR. Finally, electron transport properties were probed in a vertical junction configuration and energy level diagrams have been drawn and discussed in relation with the POM molecular electronic features inferred from cyclic-voltammetry, UV-visible absorption spectra, and theoretical calculations. The electronic properties of these POM-based molecular junctions are driven by the POM LUMO (d-orbitals) whatever the nature of the tether or the anchoring group.
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Affiliation(s)
- Maxime Laurans
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, IPCM, 4 Place Jussieu, F-75005 Paris, France
| | - Kelly Trinh
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, IPCM, 4 Place Jussieu, F-75005 Paris, France
- Sorbonne Université, CNRS, Institut des Nanosciences de Paris, INSP, 4 Place Jussieu, F-75005 Paris, France
| | - Kevin Dalla Francesca
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, IPCM, 4 Place Jussieu, F-75005 Paris, France
| | - Guillaume Izzet
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, IPCM, 4 Place Jussieu, F-75005 Paris, France
| | - Sandra Alves
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, IPCM, 4 Place Jussieu, F-75005 Paris, France
| | - Etienne Derat
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, IPCM, 4 Place Jussieu, F-75005 Paris, France
| | - Vincent Humblot
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, LRS, 4 Place Jussieu, F-75005 Paris, France
| | - Olivier Pluchery
- Sorbonne Université, CNRS, Institut des Nanosciences de Paris, INSP, 4 Place Jussieu, F-75005 Paris, France
| | - Dominique Vuillaume
- Institute for Electronics Microelectronics and Nanotechnology (IEMN), CNRS, Avenue Poincaré, F-59652 Villeneuve d'Ascq, France
| | - Stéphane Lenfant
- Institute for Electronics Microelectronics and Nanotechnology (IEMN), CNRS, Avenue Poincaré, F-59652 Villeneuve d'Ascq, France
| | - Florence Volatron
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, IPCM, 4 Place Jussieu, F-75005 Paris, France
| | - Anna Proust
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, IPCM, 4 Place Jussieu, F-75005 Paris, France
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14
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Xu X, Lu C, Xie S, Chen L, Zhao J. A trimeric tri-Tb 3+ including antimonotungstate and its Eu 3+/Tb 3+/Dy 3+/Gd 3+-codoped species with luminescence properties. Dalton Trans 2020; 49:12401-12410. [PMID: 32852009 DOI: 10.1039/d0dt01985b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A trimeric tri-Tb3+-including antimonotungstate (AMT) hybrid Na17{(WO4)[Tb(H2O)(Ac)(B-α-SbW9O31(OH)2)]3}·50H2O (Tb3W28) was successfully synthesized, in which the capped tetrahedral {WO4} group plays a significant template role in directing the aggregation of three [B-α-SbW9O33]9- fragments and three Tb3+ ions. Eu3+/Tb3+/Dy3+/Gd3+-codoped AMT materials based on Tb3W28 were firstly prepared and their luminescence properties were investigated. The red emitter Eu3+, yellow emitter Dy3+, and nonluminous Gd3+ ions were codoped into Tb3W28 to substitute Tb3+ ions for investigating the energy transfer (ET) mechanism among Eu3+, Tb3+, and Dy3+ ions. Upon the 6H15/2 → 4I13/2 excitation at 389 nm of the Dy3+ ion, the ET1 mechanism (Dy3+ → Tb3+) was confirmed as a non-radiative dipole-dipole interaction. Under the 7F6 → 5L10 excitation at 370 nm of the Tb3+ ion, the ET2 mechanism (Tb3+ → Eu3+) was identified as a non-radiative quadrupole-quadrupole interaction. Under excitation at 389 nm, the two-step successive Dy3+ → Tb3+ → Eu3+ ET3 process was proved in Dy1.2Tb3zEu0.03Gd1.77-3zW28. Through changing the excitation wavelengths, the emission color of Dy1.2Tb1.2Eu0.03Gd0.57W28 can vary from blue to yellow, in which a near-white-light emission case was observed upon excitation at 378 nm. This work not only provides a systematic ET mechanism study of hetero-Ln-codoped AMTs, but also offers some useful guidance for designing novel performance-oriented Ln-codoped polyoxometalate-based materials.
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Affiliation(s)
- Xin Xu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China.
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15
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Cherevan AS, Nandan SP, Roger I, Liu R, Streb C, Eder D. Polyoxometalates on Functional Substrates: Concepts, Synergies, and Future Perspectives. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1903511. [PMID: 32328431 PMCID: PMC7175252 DOI: 10.1002/advs.201903511] [Citation(s) in RCA: 83] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 01/28/2020] [Indexed: 05/25/2023]
Abstract
Polyoxometalates (POMs) are molecular metal oxide clusters that feature a broad range of structures and functionalities, making them one of the most versatile classes of inorganic molecular materials. They have attracted widespread attention in homogeneous catalysis. Due to the challenges associated with their aggregation, precipitation, and degradation under operational conditions and to extend their scope of applications, various strategies of depositing POMs on heterogeneous substrates have been developed. Recent ground-breaking developments in the materials chemistry of supported POM composites are summarized and links between molecular-level understanding of POM-support interactions and macroscopic effects including new or optimized reactivities, improved stability, and novel function are established. Current limitations and future challenges in studying these complex composite materials are highlighted, and cutting-edge experimental and theoretical methods that will lead to an improved understanding of synergisms between POM and support material from the molecular through to the nano- and micrometer level are discussed. Future development in this fast-moving field is explored and emerging fields of research in POM heterogenization are identified.
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Affiliation(s)
- Alexey S. Cherevan
- Institute of Materials ChemistryVienna University of TechnologyGetreidemarkt 9/BC/02Vienna1060Austria
| | - Sreejith P. Nandan
- Institute of Materials ChemistryVienna University of TechnologyGetreidemarkt 9/BC/02Vienna1060Austria
| | - Isolda Roger
- Institute of Inorganic Chemistry IUlm UniversityAlbert‐Einstein‐Allee 11Ulm89081Germany
| | - Rongji Liu
- Institute of Inorganic Chemistry IUlm UniversityAlbert‐Einstein‐Allee 11Ulm89081Germany
- CAS Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China
| | - Carsten Streb
- Institute of Inorganic Chemistry IUlm UniversityAlbert‐Einstein‐Allee 11Ulm89081Germany
- Helmholtz‐Institute UlmHelmholtzstr. 11Ulm89081Germany
| | - Dominik Eder
- Institute of Materials ChemistryVienna University of TechnologyGetreidemarkt 9/BC/02Vienna1060Austria
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16
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Xu X, Meng R, Lu C, Mei L, Chen L, Zhao J. Acetate-Decorated Tri-Ln(III)-Containing Antimonotungstates with a Tetrahedral {WO4} Group as a Structure-Directing Template and Their Luminescence Properties. Inorg Chem 2020; 59:3954-3963. [DOI: 10.1021/acs.inorgchem.9b03620] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Xin Xu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Ruru Meng
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Changtong Lu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
- China Tobacco Henan Industrial Company Ltd., Zhengzhou, Henan 450000, China
| | - Ling Mei
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Lijuan Chen
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Junwei Zhao
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
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17
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Xu X, Jiang J, Li D, Xie S, Liu L, Zeng B, Chen L, Zhao J. A terbium-antimony-oxo-cluster bridging antimonotungstate comprising divacant and tetravacant Keggin segments. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2019.107625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Xu X, Li H, Xie S, Mei L, Meng R, Chen L, Zhao J. Double-Oxalate-Bridging Tetralanthanide Containing Divacant Lindqvist Isopolytungstates with an Energy Transfer Mechanism and Luminous Color Adjustablility Through Eu 3+/Tb 3+ Codoping. Inorg Chem 2019; 59:648-660. [PMID: 31854186 DOI: 10.1021/acs.inorgchem.9b02903] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A double-oxalate-bridging tetra-Gd3+ containing divacant Lindqvist dimeric isopolytungtate Na10[Gd2(C2O4)(H2O)4(OH)W4O16]2·30H2O (Gd4W8) was obtained based on the reaction of Na2WO4·2H2O, H2C2O4, and GdCl3 in aqueous solution. Its dimeric polyoxoanion is established by two divacant Lindqvist [W4O16]8- segments connected by a rectangular tetra-nuclearity [Gd4(C2O4)2(H2O)8(OH)2]6+ cluster. Notably, neighboring trinuclear [Na3O4(H2O)11]5- clusters are interconnected to construct a picturesque 1-D sinusoidal Na-O cluster chain. The most outstanding characteristic is that 1-D sinusoidal Na-O cluster chains combine [Gd2(C2O4)(H2O)4(OH)W4O16]210- polyoxoanions together, giving rise to an intriguing 3-D extended porous framework. The red emitter Eu3+ ions and green emitter Tb3+ ions are first codoped into Gd4W8 to substitute Gd3+ ions for the exploration of the energy transfer (ET) mechanism between Eu3+ and Tb3+ ions and the color-tunable PL property in the isopolytungtate system. The PL emission spectra and decay lifetime measurements of the Eu3+/Tb3+ codoped Gd4W8 system illustrate that under excitation at 370 nm, Tb3+ ions can transfer energy to Eu3+ ions. When the molar concentration of Tb3+ ions is fixed at 0.9 and that of the Eu3+ ions gradually increases from 0.01 to 0.08, the calculated ET efficiency (ηET) from Tb3+ to Eu3+ ions increases from 7.9% for Gd0.36Tb3.6Eu0.04W8 to 67.3% for Gd0.08Tb3.6Eu0.32W8. The energy transfer mechanism (Tb3+ → Eu3+) is a nonradiative dipole-dipole interaction. Furthermore, upon excitation at 370 nm, Eu4W8 and Tb4W8 show visible red- and green-emitting lights, respectively. When codoping trace amounts of Eu3+ ions in Tb4W8, under excitation at 370 nm, Tb3.92Eu0.08W8 displays near white-light emission.
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Affiliation(s)
- Xin Xu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering , Henan University , Kaifeng , Henan 475004 , China
| | - Hailou Li
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering , Henan University , Kaifeng , Henan 475004 , China
| | - Saisai Xie
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering , Henan University , Kaifeng , Henan 475004 , China
| | - Ling Mei
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering , Henan University , Kaifeng , Henan 475004 , China
| | - Ruru Meng
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering , Henan University , Kaifeng , Henan 475004 , China
| | - Lijuan Chen
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering , Henan University , Kaifeng , Henan 475004 , China
| | - Junwei Zhao
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering , Henan University , Kaifeng , Henan 475004 , China
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19
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Xu X, Chen Y, Zhang Y, Liu Y, Chen L, Zhao J. Rare-Earth and Antimony-Oxo Clusters Simultaneously Connecting Antimonotungstates Comprising Divacant and Tetravacant Keggin Fragments. Inorg Chem 2019; 58:11636-11648. [DOI: 10.1021/acs.inorgchem.9b01570] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Xin Xu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Yanhong Chen
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Yan Zhang
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Yifan Liu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Lijuan Chen
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Junwei Zhao
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
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20
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Chakraborty B, Gan‐Or G, Duan Y, Raula M, Weinstock IA. Visible‐Light‐Driven Water Oxidation with a Polyoxometalate‐Complexed Hematite Core of 275 Iron Atoms. Angew Chem Int Ed Engl 2019; 58:6584-6589. [DOI: 10.1002/anie.201900492] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Revised: 02/20/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Biswarup Chakraborty
- Department of ChemistryBen-Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology Beer Sheva 84105 Israel
| | - Gal Gan‐Or
- Department of ChemistryBen-Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology Beer Sheva 84105 Israel
| | - Yan Duan
- Department of ChemistryBen-Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology Beer Sheva 84105 Israel
| | - Manoj Raula
- Amity Institute of Applied SciencesAmity University Noida 201313 India
| | - Ira A. Weinstock
- Department of ChemistryBen-Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology Beer Sheva 84105 Israel
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21
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Chakraborty B, Gan‐Or G, Duan Y, Raula M, Weinstock IA. Visible‐Light‐Driven Water Oxidation with a Polyoxometalate‐Complexed Hematite Core of 275 Iron Atoms. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900492] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Biswarup Chakraborty
- Department of ChemistryBen-Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology Beer Sheva 84105 Israel
| | - Gal Gan‐Or
- Department of ChemistryBen-Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology Beer Sheva 84105 Israel
| | - Yan Duan
- Department of ChemistryBen-Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology Beer Sheva 84105 Israel
| | - Manoj Raula
- Amity Institute of Applied SciencesAmity University Noida 201313 India
| | - Ira A. Weinstock
- Department of ChemistryBen-Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology Beer Sheva 84105 Israel
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22
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Chakraborty B, Weinstock IA. Water-soluble titanium-oxides: Complexes, clusters and nanocrystals. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2018.11.011] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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A Sensor Array Realized by a Single Flexible TiO₂ /POMs Film to Contactless Detection of Triacetone Triperoxide. SENSORS 2019; 19:s19040915. [PMID: 30795616 PMCID: PMC6413185 DOI: 10.3390/s19040915] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 02/10/2019] [Accepted: 02/13/2019] [Indexed: 01/07/2023]
Abstract
The homemade explosive, triacetone triperoxide (TATP), is easy to synthesize, sensitive to detonation but hard to detect directly. Vapor sensor arrays composed of a few sensor materials have the potential to discriminate TATP, but the stability of the sensor array is always a tricky problem since each sensor may encounter a device fault. Thus, a sensor array based on a single optoelectronic TiO2/PW11 sensor was first constructed by regulating the excitation wavelength to discriminate TATP from other explosives. By in situ doping of Na3PW12O40, a Keggin structure of PW11 formed on the TiO2 to promote the photoinduced electron-hole separation, thus obviously improving the detection sensitivity of the sensor film and shortening the response time. The response of the TiO2/PW11 sensor film to TATP under 365, 450 and 550 nm illumination is 81%, 42%, and 37%, respectively. The TiO2/PW11 sensor features selectivity to TATP and is able to detect less than 50 ppb. The flexibility and stability of the flexible sensor film is also demonstrated with the extent of bending. Furthermore, the sensing response cannot be affected by ambient air below 60% relative humidity.
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24
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Chakraborty B, Gan-Or G, Raula M, Gadot E, Weinstock IA. Design of an inherently-stable water oxidation catalyst. Nat Commun 2018; 9:4896. [PMID: 30459390 PMCID: PMC6244296 DOI: 10.1038/s41467-018-07281-z] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 10/26/2018] [Indexed: 11/09/2022] Open
Abstract
While molecular water-oxidation catalysts are remarkably rapid, oxidative and hydrolytic processes in water can convert their active transition metals to colloidal metal oxides or hydroxides that, while quite reactive, are insoluble or susceptible to precipitation. In response, we propose using oxidatively-inert ligands to harness the metal oxides themselves. This approach is demonstrated by covalently attaching entirely inorganic oxo-donor ligands (polyoxometalates) to 3-nm hematite cores, giving soluble anionic structures, highly resistant to aggregation, yet thermodynamically stable to oxidation and hydrolysis. Using orthoperiodate (at pH 8), and no added photosensitizers, the hematite-core complex catalyzes visible-light driven water oxidation for seven days (7600 turnovers) with no decrease in activity, far exceeding the documented lifetimes of molecular catalysts under turnover conditions in water. As such, a fundamental limitation of molecular complexes is entirely bypassed by using coordination chemistry to harness a transition-metal oxide as the reactive center of an inherently stable, homogeneous water-oxidation catalyst. A current challenge in the development of molecular water oxidation catalysts is to overcome their inherent susceptibilities to oxidative or hydrolytic degradation under turnover conditions in water. Here, the authors design an inherently-stable water oxidation catalyst using oxidatively-inert ligands to harness a reactive metal oxide.
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Affiliation(s)
- Biswarup Chakraborty
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
| | - Gal Gan-Or
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
| | - Manoj Raula
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
| | - Eyal Gadot
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
| | - Ira A Weinstock
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel.
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25
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Saganovich M, Gadot E, Raula M, Weinstock IA. Proton-coupled electron transfer from photo-excited CdS nanoparticles. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1487556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Marina Saganovich
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Eyal Gadot
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Manoj Raula
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Ira A. Weinstock
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, Israel
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26
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Wu H, Yan B, Li H, Singh V, Ma P, Niu J, Wang J. Enhanced Photostability Luminescent Properties of Er3+-Doped Near-White-Emitting DyxEr(1–x)-POM Derivatives. Inorg Chem 2018; 57:7665-7675. [DOI: 10.1021/acs.inorgchem.8b00674] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Hechen Wu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Bing Yan
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Huafeng Li
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Vikram Singh
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Pengtao Ma
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Jingyang Niu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Jingping Wang
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
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27
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Wu H, Zhi M, Singh V, Li H, Ma P, Niu J, Wang J. Elucidating white light emissions in Tm3+/Dy3+ codoped polyoxometalates: a color tuning and energy transfer mechanism study. Dalton Trans 2018; 47:13949-13956. [DOI: 10.1039/c8dt02671h] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of isomorphic Tm3+/Dy3+ codoped POM derivatives were successfully synthesized and characterized, and color-tunable emissions and the energy transfer mechanism have been studied.
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Affiliation(s)
- Hechen Wu
- Henan Key Laboratory of Polyoxometalate Chemistry
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- P. R. China
| | - Minna Zhi
- Henan Key Laboratory of Polyoxometalate Chemistry
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- P. R. China
| | - Vikram Singh
- Henan Key Laboratory of Polyoxometalate Chemistry
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- P. R. China
| | - Huafeng Li
- Henan Key Laboratory of Polyoxometalate Chemistry
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- P. R. China
| | - Pengtao Ma
- Henan Key Laboratory of Polyoxometalate Chemistry
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- P. R. China
| | - Jingyang Niu
- Henan Key Laboratory of Polyoxometalate Chemistry
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- P. R. China
| | - Jingping Wang
- Henan Key Laboratory of Polyoxometalate Chemistry
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- P. R. China
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28
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Ni B, Wang X. Chemistry and properties at a sub-nanometer scale. Chem Sci 2016; 7:3978-3991. [PMID: 30155040 PMCID: PMC6013797 DOI: 10.1039/c6sc00432f] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 03/02/2016] [Indexed: 12/31/2022] Open
Abstract
Ultrathin materials at a sub-nanometer scale not only feature atomic scale size, but also possess unprecedented properties compared to conventional nanomaterials. The two aspects endow such materials with great potential. In sub-nanometric (SN) wires, the weak interactions may overwhelm the rigidity of inorganic compounds and dominate behaviours at this regime. Consequently intricate structures and polymer-like rheology can be obtained, shedding new light on chemistry as well as material design. As for 0D or 2D SN materials, clusters are analogous to molecules and SN sheets show unique electronic structures. Taking SN wire as an example, their growth mechanisms are discussed, as well as their applications and potentials. The chemistry at this regime can promote their application-oriented research, however, this is not yet well explored. In short, there is great potential at the sub-nanometer scale, although there are also many challenges ahead.
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Affiliation(s)
- Bing Ni
- Key Lab of Organic Optoelectronics and Molecular Engineering , Department of Chemistry , Tsinghua University , Beijing , 100084 , China .
| | - Xun Wang
- Key Lab of Organic Optoelectronics and Molecular Engineering , Department of Chemistry , Tsinghua University , Beijing , 100084 , China .
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