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1
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Zhao Y, Wan R, Li H, Zhao R, Chen W, Song H, Ma P, Niu J, Wang J. 183W Nuclear Magnetic Resonance and Photocatalysis Studies of Two Ruthenium-Decorated Isopolyoxometalates {Ru 2W 10} and {Ru 2W 13} via pH-Induced Assemblies. Inorg Chem 2022; 61:12097-12105. [DOI: 10.1021/acs.inorgchem.2c00664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yujie Zhao
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, P. R. China
| | - Rong Wan
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, P. R. China
| | - Huafeng Li
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, P. R. China
| | - Ruikun Zhao
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, P. R. China
| | - Wenjing Chen
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, P. R. China
| | - Haoming Song
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, P. R. China
| | - Pengtao Ma
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, P. R. China
| | - Jingyang Niu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, P. R. China
| | - Jingping Wang
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, P. R. China
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2
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Wan R, Liu Z, Ma X, Li H, Ma P, Zhang C, Niu J, Wang J. Discovery of two Na +-centered Silverton-type polyoxometalates {NaM 12O 42} (M = Mo, W). Chem Commun (Camb) 2021; 57:2172-2175. [PMID: 33524095 DOI: 10.1039/d0cc07590f] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new members of highly charged Silverton archetype [NaM12O42]11- were demonstrated in the 3D POM-based frameworks Na3[NaM12O42(Ru(DMSO)3)4]·13H2O (M = Mo (1), W (2)), where the unusual icosahedron coordination of a Na+ ion incubated as a heteroatom is reported for the first time in topical POMs. Furthermore, 23Na NMR was applied to certify the interpretation of X-ray diffraction data concerning Na localization. Additionally, the porous nature of the frameworks 1 and 2 has also been investigated.
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Affiliation(s)
- Rong Wan
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China.
| | - Zhen Liu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China.
| | - Xinyi Ma
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China.
| | - Huafeng Li
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China.
| | - Pengtao Ma
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China.
| | - Chao Zhang
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China.
| | - Jingyang Niu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China.
| | - Jingping Wang
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China.
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3
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Sadasivan R, Patel A, Patel A. Sandwich type tri-palladium substituted phosphotungstate, [Pd3(PW9O34)2]11−: Synthesis, structural characterization and catalytic evaluation. Polyhedron 2021. [DOI: 10.1016/j.poly.2020.114896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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4
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Wang HN, Zhang AG, Zhang Z, Tian HR, Yue Q, Zhao X, Lu Y, Liu SX. Synthesis and Properties of a Series of Pure Inorganic Ionic Liquids Based on Rare Earth Cations and Polyoxometalates. ACTA CHIMICA SINICA 2021. [DOI: 10.6023/a21040130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Shi HY, Zhou WY, Song XM, Jia AQ, Shi HT, Zhang QF. Ruthenium( ii)-supported phosphovanadomolybdates [Ru(dmso) 3PMo 6V 3O 32] 6− and [Ru(PMo 6V 3O 32) 2] 14−, and their use as heterogeneous catalysts for oxidation of alcohols. NEW J CHEM 2021. [DOI: 10.1039/d0nj05752e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Two stable ruthenium(ii)-substituted phosphovanadomolybdates [RuII(dmso)3PMoVI6VV3O32]6− and [RuII(PMoVI6VV3O32)2]14− are synthesized. They could catalyze oxidation of alcohols with good conversion and selectivity.
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Affiliation(s)
- Hao-Yu Shi
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology
- Ma’anshan
- P. R. China
| | - Wen-Yan Zhou
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology
- Ma’anshan
- P. R. China
| | - Xiao-Ming Song
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology
- Ma’anshan
- P. R. China
| | - Ai-Quan Jia
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology
- Ma’anshan
- P. R. China
| | - Hua-Tian Shi
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology
- Ma’anshan
- P. R. China
| | - Qian-Feng Zhang
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology
- Ma’anshan
- P. R. China
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6
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Patel A, Patel J. Nickel salt of phosphomolybdic acid as a bi-functional homogeneous recyclable catalyst for base free transformation of aldehyde into ester. RSC Adv 2020; 10:22146-22155. [PMID: 35516618 PMCID: PMC9054555 DOI: 10.1039/d0ra04119j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 05/29/2020] [Indexed: 12/20/2022] Open
Abstract
A Ni salt of phosphomolybdic acid (NiHPMA) was synthesized and characterized by various physico-chemical techniques such as EDX, UV-Visible spectroscopy, FT-IR, Raman spectroscopy and XPS. FT-IR and Raman spectroscopy confirm the presence of Ni as a counter cation while UV-Visible and XPS studies to confirm the presence of Ni(ii) in the catalyst. The catalyst was evaluated for its bi-functional activity towards the tandem conversion of benzaldehyde to ethyl benzoate and it was found that very small amounts of Ni (2.64 × 10-3 mmol) enhance the selectivity towards benzoate. A detailed mechanistic study was carried out by UV-Visible and Raman spectroscopy to confirm that both intermediate species, Mo-peroxo and Ni-oxo, are responsible for higher selectivity towards esters. Further, a study to determine the effect of addenda atoms (heteropoly acid) was also carried out. The catalyst was also found to be viable for a number of aldehydes under optimized conditions.
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Affiliation(s)
- Anjali Patel
- Polyoxometalates and Catalysis Laboratory, Department of Chemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda Vadodara-390002 India
| | - Jay Patel
- Polyoxometalates and Catalysis Laboratory, Department of Chemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda Vadodara-390002 India
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7
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Li H, He P, Wan R, Zou Y, Zhao X, Ma P, Niu J, Wang J. Trinuclear ruthenium core-containing polyoxometalate-based hybrids: preparation, characterization and catalytic behavior. Dalton Trans 2020; 49:2895-2904. [PMID: 32067023 DOI: 10.1039/c9dt04616j] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Two ruthenium-containing polyoxometalate-based hybrids (Ru-POMs), KH8[Ru3O(Trz)6Cl3]2[(NaO6)W6(H2O)6(AsW9O33)4]·28H2O (1) and H3[Ru3O(Trz)6Cl3]2[(WO)2W(OH)(AsW9O33)2]·6H2O (2), (Trz = 1,2,4-triazole), were successfully isolated by a one-step hydrothermal method under different acidic conditions and further characterized by single-crystal X-ray diffraction, powder X-ray diffraction (PXRD), IR spectroscopy, electrospray ionization and mass spectrometry (ESI-MS), thermogravimetric (TG) analyses and elemental analyses. Single-crystal X-ray diffraction analyses reveal two polyanions comprised of four/two identical trivacant Keggin-type polyanion building blocks, leading to the formation of tetrameric/dimeric assembly stabilized by additional metal-oxo cores, respectively. ESI-MS shows that the polyanion units [(NaO6)W6(H2O)6(AsW9O33)4]11- and [(WO)2W(OH)(AsW9O33)2]5- are intact in mixed solvent. Moreover, the two heterogeneous catalysts with trinuclear ruthenium cations were further investigated, and 1 was found to exhibit much higher yield (94.1%)/conversion (95.1%) and better selectivity (>99%) towards the oxidation of thioanisole to sulfoxide than 2.
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Affiliation(s)
- Huafeng Li
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China.
| | - Peipei He
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China.
| | - Rong Wan
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China.
| | - Yan Zou
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China.
| | - Xue Zhao
- 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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8
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Patel A, Patel K. Polyoxometalate based hybrid chiral material: Synthesis, characterizations and aerobic asymmetric oxidation reaction. J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1691723] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Anjali Patel
- Polyoxometalates and Catalysis Laboratory, Department of Chemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, India
| | - Ketan Patel
- Polyoxometalates and Catalysis Laboratory, Department of Chemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, India
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9
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Wan R, Li H, Ma X, Liu Z, Singh V, Ma P, Zhang C, Niu J, Wang J. Preparation, characterization and electrocatalysis performance of a trimeric ruthenium-substituted isopolytungstate. Dalton Trans 2019; 48:10327-10336. [DOI: 10.1039/c9dt01615e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The ruthenium-containing isopolytungstate Rb10K3H6[SeO3(H9Ru5.5W30.5O114)]Cl3·48H2O was isolated and then served as a catalyst, showing electrochemical catalytic activity towards the oxidation reaction of nitrite.
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Affiliation(s)
- Rong Wan
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Huafeng Li
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Xinyi Ma
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Zhen Liu
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Vikram Singh
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Pengtao Ma
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Chao Zhang
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Jingyang Niu
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Jingping Wang
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
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10
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Liu YJ, Jin MT, Chen LJ, Zhao JW. Recent advances in isopolyoxotungstates and their derivatives. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2018; 74:1202-1221. [PMID: 30398172 DOI: 10.1107/s2053229618012524] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Accepted: 09/04/2018] [Indexed: 11/10/2022]
Abstract
During the past decade, isopolyoxotungstates (iso-POTs) and their derivatives have been greatly developed due to their unique structures and potential applications in luminescence, magnetism, catalysis etc. This brief review is principally focused on the main research progress on iso-POTs, iso-POT-based transition-metal derivatives, iso-POT-based rare-earth derivatives, iso-POT-based organometallic derivatives and iso-POT-based heterometallic derivatives, and gives a summary of some representative examples of their syntheses, structures and related properties. In addition, an outlook on the future of this area is presented in the final section. We believe that this systematic commentary on iso-POTs and their derivatives will not only disclose a rich set of iso-POT structures, but also reveal a more promising direction for the further functionalization of iso-POTs.
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Affiliation(s)
- Ya Jie Liu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan Province, People's Republic of China
| | - Meng Tian Jin
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan Province, People's Republic of China
| | - Li Juan Chen
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan Province, People's Republic of China
| | - Jun Wei Zhao
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan Province, People's Republic of China
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11
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Singh V, Ma P, Drew MGB, Wang J, Niu J. A comprehensive approach providing a new synthetic route for bimetallic electrocatalysts via isoPOMs [M/Rh(Cp*) 4W 8O 32] (M = Rh (1) and Ir (2)). Dalton Trans 2018; 47:13870-13879. [PMID: 30225474 DOI: 10.1039/c8dt03227k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polyoxometalates (POMs) are highly versatile materials if paired with various conducting supports. We here present a new prospective approach for obtaining advanced electrocatalytic systems via POMs (1 and 2) nanostructured on Ni foam (NF) to give bimetallic nanohybrid composite materials M0.4Ni0.6/WO3 (M = Rh (3) or Ir (4)). By this pathway, two rare isopolyoctatungstate-based organometallic clusters [Hx(MCp*)4W8O32]·yH2O (in 1, M = Rh, x = 8, y = 23; in 2, M = Ir, x = 4, y = 17.33) have been synthesized via one-pot reactions using [Cp*MCl2]2 (Cp* = pentamethylcyclopentadienyl, M = Rh or Ir) and Na2WO4·2H2O in basic conditions. Compounds 1 and 2 were successfully nanostructured on the surface of commercially available NF and were thermally reduced to M0.4Ni0.6/WO3 (M = Rh (3) or Ir (4)) after annealing at 400 °C for 8 h in a 15% H2/N2 atmosphere. Electrodes modified with the POMs 3 and 4 exhibited remarkable HER activities in a 1 M KOH solution and achieved a current density of 10 mA cm-2 at low overpotentials of about 67 and 35 mV versus RHE, with Tafel slopes of 56 and 34 mV dec-1, respectively.
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Affiliation(s)
- Vikram Singh
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China.
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Zerrouki M, Boudjema S, Choukchou-Braham A, Rekkab-Hammoumraoui I. Synthesis, characterization and optimization of heterogeneous catalytic cyclohexene oxidation by tungstophospho(aqua)ruthenate via the fractional factorial design methodology. NEW J CHEM 2018. [DOI: 10.1039/c8nj02690d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Keggin-type tungstophospho(aqua)ruthenate (PRuW) was synthesized and supported on acid activated montmorillonite under mild conditions.
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Affiliation(s)
- Mostapha Zerrouki
- Laboratoire de Catalyse et Synthèse en Chimie Organique
- Faculté des Sciences
- Université de Tlemcen
- Algeria
| | - Souheyla Boudjema
- Laboratoire de Catalyse et Synthèse en Chimie Organique
- Faculté des Sciences
- Université de Tlemcen
- Algeria
- Département de Forage et Mécanique des Chantiers Pétroliers
| | | | - Ilhem Rekkab-Hammoumraoui
- Laboratoire de Catalyse et Synthèse en Chimie Organique
- Faculté des Sciences
- Université de Tlemcen
- Algeria
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13
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Patel A, Sadasivan R. Microwave assisted one pot synthesis and characterization of Cesium salt of di-copper substituted phosphotungstate and its application in the selective epoxidation of cis-cyclooctene with tert-butyl hydroperoxide. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.12.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Sartorel A, Miró P, Carraro M, Berardi S, Bortolini O, Bagno A, Bo C, Bonchio M. Oxygenation by Ruthenium Monosubstituted Polyoxotungstates in Aqueous Solution: Experimental and Computational Dissection of a Ru(III)-Ru(V) Catalytic Cycle. Chemistry 2014; 20:10932-43. [DOI: 10.1002/chem.201404088] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Indexed: 11/10/2022]
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15
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Pathan S, Patel A. Keggin type transition metal substituted phosphomolybdates: heterogeneous catalysts for selective aerobic oxidation of alcohols and alkenes under solvent free condition. Catal Sci Technol 2014. [DOI: 10.1039/c3cy00717k] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Meng RQ, Wang B, Sui HM, Li B, Song W, Wu LX, Zhao B, Bi LH. Organoruthenium-Supported Polyoxotungstate - Synthesis, Structure and Oxidation ofn-Hexadecane with Air. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201201037] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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Meng RQ, Suo L, Hou GF, Liang J, Bi LH, Li HL, Wu LX. Organo-Ru supported sandwich-type tungstoarsenates: synthesis, structure and catalytic properties. CrystEngComm 2013. [DOI: 10.1039/c3ce00045a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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18
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Barats‐Damatov D, Shimon LJW, Neumann R. Hexagonal Supramolecular Assemblies Based on a Ru
II
(DMSO)
3
‐ or Os
II
(DMSO)
3
‐Capped {HW
9
O
33
} Isopolyanion with Potassium Cations as Linkers. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200953] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Delina Barats‐Damatov
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot, Israel 76100, Fax: +972‐8‐9344142, http://www.weizmann.ac.il/Organic_Chemistry/neumann/
| | - Linda J. W. Shimon
- Department of Chemical Research Support, Weizmann Institute of Science, Rehovot, Israel 76100
| | - Ronny Neumann
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot, Israel 76100, Fax: +972‐8‐9344142, http://www.weizmann.ac.il/Organic_Chemistry/neumann/
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20
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Izarova NV, Pope MT, Kortz U. Noble Metals in Polyoxometalates. Angew Chem Int Ed Engl 2012; 51:9492-510. [DOI: 10.1002/anie.201202750] [Citation(s) in RCA: 322] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Indexed: 11/06/2022]
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21
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Patel K, Patel A. Functionalization of Keggin type manganese substituted phosphotungstate by R-(−)-1-cyclohexylethylamine: Synthesis and characterization. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2011.10.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Laurencin D, Thouvenot R, Boubekeur K, Gouzerh P, Proust A. Connecting ruthenium substituted Keggin-type tungstophosphates by oxotungstic bridges: Evidence for the steric effect of {RuL3}2+ (L3=η6-arene, (DMSO)3) fragments. CR CHIM 2012. [DOI: 10.1016/j.crci.2011.08.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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23
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Shringarpure P, Tripuramallu BK, Patel K, Patel A. Synthesis, structural, and spectral characterization of Keggin-type mono cobalt(II)-substituted phosphotungstate. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.636428] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- Pragati Shringarpure
- a Chemistry Department, Faculty of Science , M. S. University of Baroda , Vadodara
| | | | - Ketan Patel
- a Chemistry Department, Faculty of Science , M. S. University of Baroda , Vadodara
| | - Anjali Patel
- a Chemistry Department, Faculty of Science , M. S. University of Baroda , Vadodara
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24
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Sadakane M, Rinn N, Moroi S, Kitatomi H, Ozeki T, Kurasawa M, Itakura M, Hayakawa S, Kato K, Miyamoto M, Ogo S, Ide Y, Sano T. Preparation and StructuralCharacterization of RuII-DMSO and RuIII-DMSO-substituted α-Keggin-type Phosphotungstates, [PW11O39RuIIDMSO]5- and [PW11O39RuIIIDMSO]4-, and Catalytic Activity for Water Oxidation. Z Anorg Allg Chem 2011. [DOI: 10.1002/zaac.201100213] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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26
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Fang X, Luban M. {Mn14W48} aggregate: the perspective of isopolyanions as ligands. Chem Commun (Camb) 2011; 47:3066-8. [DOI: 10.1039/c0cc04403b] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Patel K, Shringarpure P, Patel A. One-step synthesis of a Keggin-type manganese(II)-substituted phosphotungstate: structural and spectroscopic characterization and non-solvent liquid phase oxidation of styrene. TRANSIT METAL CHEM 2010. [DOI: 10.1007/s11243-010-9450-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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28
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Dolbecq A, Dumas E, Mayer CR, Mialane P. Hybrid Organic−Inorganic Polyoxometalate Compounds: From Structural Diversity to Applications. Chem Rev 2010; 110:6009-48. [PMID: 20666374 DOI: 10.1021/cr1000578] [Citation(s) in RCA: 1304] [Impact Index Per Article: 93.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anne Dolbecq
- Institut Lavoisier de Versailles, UMR 8180, Université de Versailles Saint-Quentin en Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles cedex, France
| | - Eddy Dumas
- Institut Lavoisier de Versailles, UMR 8180, Université de Versailles Saint-Quentin en Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles cedex, France
| | - Cédric R. Mayer
- Institut Lavoisier de Versailles, UMR 8180, Université de Versailles Saint-Quentin en Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles cedex, France
| | - Pierre Mialane
- Institut Lavoisier de Versailles, UMR 8180, Université de Versailles Saint-Quentin en Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles cedex, France
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29
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Bi LH, Wang B, Hou GF, Li B, Wu LX. A novel heptatungstovanadate fragment stabilized by organo-ruthenium group: [HVW7O28Ru(dmso)3]6−. CrystEngComm 2010. [DOI: 10.1039/c0ce00087f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Bi LH, Hou GF, Bao YY, Li B, Wu LX, Gao ZM, McCormac T, Mal SS, Dickman MH, Kortz U. Syntheses and Crystal Structures of dmso-Coordinated Tungstoantimonates(III) and -bismuthates(III). Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900590] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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31
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Shringarpure P, Patel A. Undecatungstophospho(aqua)ruthenate(II): One pot synthesis, characterization and non-solvent liquid phase aerobic oxidation of alkenes. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.04.044] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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32
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Bi LH, Li B, Bi S, Wu LX. Synthesis and crystal structure of RuIII-supported tungstoantimonate [Sb2W20RuIII2(H2O)2(dmso)6O68]4−. J SOLID STATE CHEM 2009. [DOI: 10.1016/j.jssc.2009.03.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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33
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Zhang YN, Zhou BB, Li YG, Su ZH, Zhao ZF. A new molybdenum(V) nickel phosphate based on divacant [H30(MoV16O32)Ni14(PO4)26O2(OH)4(H2O)8]12− wheel. Dalton Trans 2009:9446-51. [DOI: 10.1039/b905277a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Bi LH, Li B, Wu LX, Shao KZ, Su ZM. Synthesis, characterization and crystal structure of a novel Os(II)-supported tungstoarsenate [HAsW7O28Os(dmso)3]6−. J SOLID STATE CHEM 2009. [DOI: 10.1016/j.jssc.2008.10.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Bi LH, Hou GF, Li B, Wu LX, Kortz U. Synthesis and crystal structure of pseudo-sandwich-type heteropolytungstates functionalized by organometallic ruthenium(ii). Dalton Trans 2009:6345-53. [DOI: 10.1039/b821750e] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Bi LH, Hou GF, Wu LX, Kortz U. An organo-ruthenium grafted zinc-substituted tungstoarsenate. CrystEngComm 2009. [DOI: 10.1039/b905030b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Dingwall LD, Corcoran CM, Lee AF, Olivi L, Lynam JM, Wilson K. A polyoxometallate–tethered Ru complex as a catalyst in solventless phenyl acetylene oligomerisation. CATAL COMMUN 2008. [DOI: 10.1016/j.catcom.2008.07.036] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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38
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Chen SW, Villanneau R, Li Y, Chamoreau LM, Boubekeur K, Thouvenot R, Gouzerh P, Proust A. Hydrothermal Synthesis and Structural Characterization of the High-Valent Ruthenium-Containing Polyoxoanion [{PW11O39}2{(HO)RuIV–O–RuIV(OH)}]10–. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200701359] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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39
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Mixed-Valence 24-Vanadophosphate Decorated with Six RuII(dmso)3 Groups: [{RuII 3(dmso)9PVV 11VIVRuIIIO37(OH)3}2]8−. J CLUST SCI 2008. [DOI: 10.1007/s10876-007-0180-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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40
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Boujday S, Blanchard J, Villanneau R, Krafft JM, Geantet C, Louis C, Breysse M, Proust A. Polyoxomolybdate-stabilized Ru(0) nanoparticles deposited on mesoporous silica as catalysts for aromatic hydrogenation. Chemphyschem 2008; 8:2636-42. [PMID: 18058778 DOI: 10.1002/cphc.200700533] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
We use polyoxometalates as precursors for the preparation of heterogeneous catalysts. In the starting molecular precursor [{Ru(C6Me6)}(2)Mo5O18{Ru(C6Me6)(H2O)}], three ruthenium arene fragments are supported on a formally lacunary Lindqvist-type polyoxomolybdate. This species was introduced by incipient wetness impregnation into the porosity of a SBA-15-type mesoporous silica. The evolution of the system under reducing atmosphere is followed by several methods, such as temperature-programmed reduction (TPR), Raman, and X-ray absorption spectroscopy (XAS). The results indicate that the polyoxometalate structure is retained after grafting on silica and allows the stabilization of Ru(0) nanoparticles after reduction. The resulting system exhibits interesting catalytic activity in benzene hydrogenation.
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Affiliation(s)
- Souhir Boujday
- Laboratoire de Chimie Inorganique et Matériaux Moléculaires, UMR 7071, Université Pierre et MarieCurie-Paris 6, 2 Place Jussieu; 75252 Paris Cedex 05, France
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41
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Sadakane M, Iimuro Y, Tsukuma D, Bassil BS, Dickman MH, Kortz U, Zhang Y, Ye S, Ueda W. Carbonyl–ruthenium substituted α-Keggin-tungstosilicate, [α-SiW11O39RuII(CO)]6−: synthesis, structure, redox studies and reactivity. Dalton Trans 2008:6692-8. [DOI: 10.1039/b810987g] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Hou Y, Fang X, Hill C. Breaking Symmetry: Spontaneous Resolution of a Polyoxometalate. Chemistry 2007; 13:9442-7. [DOI: 10.1002/chem.200701160] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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43
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Guo HX, Liu JM, Zhu GH. A two-dimensional zinc-molybdenum(V) phosphate organic–inorganic hybrid polymer with fluorescence. J COORD CHEM 2007. [DOI: 10.1080/00958970600924837] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Hong-Xu Guo
- a Department of Chemistry and Environmental Science , Zhangzhou Normal University , Zhangzhou 363000, P.R. China
| | - Jia-ming Liu
- a Department of Chemistry and Environmental Science , Zhangzhou Normal University , Zhangzhou 363000, P.R. China
| | - Guo-hui Zhu
- a Department of Chemistry and Environmental Science , Zhangzhou Normal University , Zhangzhou 363000, P.R. China
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44
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Nomiya K, Hayashi K, Kasahara Y, Iida T, Nagaoka Y, Yamamoto H, Ueno T, Sakai Y. Organometallic Complexes Supported on a Metal-Oxide Cluster. pH-Dependent Interconversion between the Monomeric and Dimeric Species of the Polyoxoanion-Supported [(arene)Ru]2+Complex. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.724] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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45
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Mal SS, Nsouli NH, Dickman MH, Kortz U. Organoruthenium derivative of the cyclic [H7P8W48O184]33? anion: [{K(H2O)}3{Ru(p-cymene)(H2O)}4P8W49O186(H2O)2]27? Dalton Trans 2007:2627-30. [PMID: 17576486 DOI: 10.1039/b706762n] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reaction of [Ru(p-cymene)Cl2]2 with [H7P8W48O184]33- (P8W48) in aqueous acidic medium results in the organometallic derivative [{K(H2O)}3{Ru(p-cymene)(H2O)}4P8W49O186(H2O)2]27- (1); in addition to the four {Ru(p-cymene)(H2O)} units, an unusual WO6 group with four equatorial, terminal ligands is also grafted to the crown-shaped P8W48 precursor.
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Affiliation(s)
- Sib Sankar Mal
- Jacobs University Bremen, School of Engineering and Science, 28725 Bremen, Germany
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46
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Sadakane M, Tsukuma D, Dickman MH, Bassil BS, Kortz U, Capron M, Ueda W. Dimerization of mono-ruthenium substituted α-Keggin-type tungstosilicate [α-SiW11O39RuIII(H2O)]5−to µ-oxo-bridged dimer in aqueous solution: synthesis, structure, and redox studies. Dalton Trans 2007:2833-8. [PMID: 17592600 DOI: 10.1039/b702813j] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the dimerization of a mono-ruthenium(III) substituted alpha-Keggin-type tungstosilicate [alpha-SiW(11)O(39)Ru(III)(H2O)](5-) to a micro-oxo-bridged dimer [{alpha-SiW(11)O(39)Ru(m)}2O](n-) (m = III, n = 12; m = IV/III, n = 11; m = IV, n = 10). Single crystal X-ray structure analysis of Rb(10)[{alpha-SiW(11)O(39)Ru(IV)}2O].9.5H2O (triclinic, P1, with a = 12.7650(6) A, b = 18.9399(10) A, c = 20.2290(10) A, alpha = 72.876(3) degrees, beta = 88.447(3) degrees, gamma = 80.926(3) degrees, V = 4614.5(4) A(3), Z = 2) reveals that two mono-ruthenium substituted tungstosilicate alpha-Keggin units are connected through micro-oxo-bridging Ru-O-Ru bonds. Solution (183)W-NMR of [{SiW(11)O(39)Ru(IV)}2O](10-) resulted in six peaks (-63, -92, -110, -128, -132, and -143 ppm, intensities 2 : 2 : 1 : 2 : 2 : 2) confirming that the micro-oxo bridged dimer structure is maintained in aqueous solution. The dimerization mechanism is presumably initiated by deprotonation of the aqua-ruthenium complex [alpha-SiW(11)O(39)Ru(III)(H2O)](5-) leading to a hydroxy-ruthenium complex [alpha-SiW(11)O(39)Ru(III)(OH)](6-). Dimerization of two hydroxy-ruthenium complexes produces the micro-oxo bridged dimer [{alpha-SiW(11)O(39)Ru(III)}2O](12-) and a water molecule. The Ru(III) containing dimer is oxidized by molecular oxygen to produce a mixed valence species [{alpha-SiW(11)O(39)Ru(IV-III)}2O](11-), and further oxidation results in the Ru(IV) containing [{alpha-SiW(11)O(39)Ru(IV)}2O](10-).
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Affiliation(s)
- Masahiro Sadakane
- Catalysis Research Center, Hokkaido University, N-21, W-10, 001-0021 Sapporo, Japan.
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47
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Laurencin D, Thouvenot R, Boubekeur K, Proust A. Synthesis and reactivity of {Ru(p-cymene)}2+derivatives of [Nb6O19]8−: a rational approach towards fluxional organometallic derivatives of polyoxometalates. Dalton Trans 2007:1334-45. [PMID: 17372649 DOI: 10.1039/b617390j] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three {Ru(p-cym)}(2+) (p-cym = p-cymene) derivatives of [Nb(6)O(19)](8-)-[Nb(6)O(19){Ru(p-cym)}](6-) (Nb(6)Ru(1)), trans-[Nb(6)O(19){Ru(p-cym)}(2)](4-) (t-Nb6Ru2), and [Nb(6)O(19){Ru(p-cym)}(4)] (Nb(6)Ru(4))--have been synthesized in water by reaction between [Ru(p-cym)Cl(2)](2) and the hexaniobate. In the solid state, Nb(6)Ru(1) and Nb(6)Ru(4) have been characterized by IR and EDX spectroscopies, whereas t-Nb(6)Ru(2) has been characterized by IR spectroscopy and single-crystal X-ray diffraction (crystal data for K(4)-trans-[Nb(6)O(19){Ru(p-cym)}(2)].14H(2)O (K(4)-t-Nb(6)Ru(2).14H(2)O). In solution, all compounds were characterized by (1)H NMR and ESI mass spectrometry analyses, and Nb(6)Ru(1) was also analyzed by (17)O NMR. These studies allowed a comparison of the differences in behaviour of the three complexes in water: Nb(6)Ru(1) is particularly stable, Nb(6)Ru(4) decomposes by loss of {Ru(p-cym)}(2+) fragments, and trans-[Nb(6)O(19){Ru(p-cym)}(2)](4-) isomerizes into cis-[Nb(6)O(19){Ru(p-cym)}(2)](4-). A rational mechanism for the isomerisation of t-Nb(6)Ru(2) is proposed on the basis of a kinetic study.
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Affiliation(s)
- Danielle Laurencin
- Laboratoire de Chimie Inorganique et Matériaux Moléculaires, UMR 7071, Université Pierre et Marie Curie-Paris6, Case 42, 4 place Jussieu, 75252, Paris Cedex 05, France
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48
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49
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Sakai Y, Shinohara A, Hayashi K, Nomiya K. Synthesis and Characterization of Two Novel, Mono-Lacunary Dawson Polyoxometalate-Based, Water-Soluble Organometallic Ruthenium(II) Complexes: Molecular Structure of [{(C6H6)Ru(H2O)}(α2-P2W17O61)]8-. Eur J Inorg Chem 2006. [DOI: 10.1002/ejic.200500408] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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50
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Sadakane M, Tsukuma D, Dickman MH, Bassil B, Kortz U, Higashijima M, Ueda W. Structural characterization of mono-ruthenium substituted Keggin-type silicotungstates. Dalton Trans 2006:4271-6. [PMID: 16932820 DOI: 10.1039/b606266k] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have synthesized the mono-ruthenium substituted Keggin-type silicotungstate [SiW(11)O(39)Ru(III)(H(2)O)](5-) (1a) by reaction of the mono-lacunary silicotungstate precursor [SiW(11)O(39)](8-) with Ru(acac)(3) under hydrothermal conditions and isolated as the caesium salt Cs(5)[SiW(11)O(39)Ru(III)(H(2)O)] (1). The DMSO-coordinated complex [SiW(11)O(39)Ru(III)(DMSO)](5-) (2a) was prepared by reaction of 1a with DMSO in aqueous solution at 353 K and isolated as the caesium-potassium mixed salt Cs(4.9)K(0.1)[SiW(11)O(39)Ru(III)(DMSO)] (2). Both compounds 1 and 2 were characterized by single-crystal X-ray structure analysis, powder X-ray structure analysis, UV-Vis spectroscopy, cyclic voltammetry, IR-spectroscopy and elemental analysis. 1 crystallized in the tetragonal space group P4(2)/ncm with a = 20.9299(4), c = 10.3603(4) Angstrom, Z = 4. The ruthenium atom in the Keggin unit could not be distinguished from the tungsten due to disorder. The structural analysis of 2 (monoclinic, P2(1)/c, a = 13.5850(4), b = 20.2764(7), c = 18.1326(4) Angstrom, beta = 90.8730(10) degrees , Z = 4) successfully revealed that the incorporated ruthenium atom is coordinated by DMSO through a Ru-S bond. Polyanion 2a represents the first mono-substituted Keggin ion in which the ruthenium center is not crystallographically disordered. UV-Vis spectroscopy combined with controlled potential electrolysis confirmed that the incorporated rutheniums in 1 and 2 have a valence state of +3. The IR spectra of both 1 and 2 were very similar. All these data indicate that 1 synthesized by reaction of the mono-lacunary silicotungstate K(8)[SiW(11)O(39)] with Ru(acac)(3) under hydrothermal conditions is truly the mono-ruthenium substituted Keggin-type silicotungstate.
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Affiliation(s)
- Masahiro Sadakane
- Catalysis Research Center, Hokkaido University, N-21, W-10, 001-0021 Sapporo, Japan.
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