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Krause DC, Näther C, Bensch W. Synthesis and crystal structure of bis-[μ- N, N-bis-(2-amino-eth-yl)ethane-1,2-di-amine]-bis-[ N, N-bis-(2-amino-eth-yl)ethane-1,2-di-amine]-μ 4-oxido-hexa-μ 3-oxido-octa-μ 2-oxido-tetra-oxido-tetra-nickel(II)hexa-tantalum(V) nona-deca-hydrate. Acta Crystallogr E Crystallogr Commun 2021; 77:1253-1257. [PMID: 34925892 PMCID: PMC8647742 DOI: 10.1107/s2056989021011531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 11/01/2021] [Indexed: 11/10/2022]
Abstract
Reaction of K8{Ta6O19}·16H2O with [Ni(tren)(H2O)Cl]Cl·H2O in different solvents led to the formation of single crystals of the title compound, [Ni4Ta6O19(C6H18N4)4]·19H2O or {[Ni2(κ4-tren)(μ-κ3-tren)]2Ta6O19}·19H2O (tren is N,N-bis-(2-amino-eth-yl)-1,2-ethanediamine, C6H18N4). In its crystal structure, one Lindqvist-type anion {Ta6O19}8- (point group symmetry ) is connected to two NiII cations, with both of them coordinated by one tren ligand into discrete units. Both NiII cations are sixfold coordinated by O atoms of the anion and N atoms of the organic ligand, resulting in slightly distorted [NiON5] octa-hedra for one and [NiO3N3] octa-hedra for the other cation. These clusters are linked by inter-molecular O-H⋯O and N-H⋯O hydrogen bonding involving water mol-ecules into layers parallel to the bc plane. Some of these water mol-ecules are positionally disordered and were refined using a split model. Powder X-ray diffraction revealed that a pure crystalline phase was obtained but that on storage at room-temperature this compound decomposed because of the loss of crystal water mol-ecules.
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Affiliation(s)
- Dana-Céline Krause
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 2, D-24118 Kiel, Germany
| | - Christian Näther
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 2, D-24118 Kiel, Germany
| | - Wolfgang Bensch
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 2, D-24118 Kiel, Germany
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Krause DC, Mangelsen S, Näther C, Bensch W. Synthesis, crystal structure and selected properties of K2[Ni(dien)2]{[Ni(dien)]2Ta6O19}·11 H2O. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2021. [DOI: 10.1515/znb-2021-0129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Abstract
The new compound K2[Ni(dien)2]{[Ni(dien)]2Ta6O19}·11 H2O crystallized at room temperature applying a diffusion based reaction in a H2O/DMSO mixture using K8{Ta6O19}·16 H2O, Ni(NO3)2·6H2O and dien (diethylenetriamine). In the crystal structure, the Lindqvist-type anion [Ta6O19]8– is structurally expanded by two octahedrally Ni2+-centered complexes via three Ni–µ
2-O–Ta bonds thus generating the new {[Ni(dien)]2Ta6O19}4– anion. Two KO8 polyhedra share a common edge to form a K2O14 moiety, which connects the {[Ni(dien)]2Ta6O19}4– cluster shells into chains. The isolated [Ni(dien)2]2+ complexes are located in voids generated by the structural arrangement of the chains. An extended hydrogen bonding network between the different constituents generates a 3D network. The crystal water molecules can be thermally removed to form a highly crystalline dehydrated compound. Partial water uptake leads to the formation of a crystalline intermediate with a reduced unit cell volume compared to the fully hydrated sample. Water sorption experiments demonstrate that the fully dehydrated sample can be fully reconverted to the hydrated compound. The crystal field splitting parameters for the octahedrally coordinated Ni2+-centered complexes have been evaluated from an UV/Vis spectrum yielding D
q = 1056 cm−1 and B = 887 cm−1.
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Affiliation(s)
- Dana-Céline Krause
- Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel , 24118 Kiel , Germany
| | - Sebastian Mangelsen
- Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel , 24118 Kiel , Germany
| | - Christian Näther
- Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel , 24118 Kiel , Germany
| | - Wolfgang Bensch
- Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel , 24118 Kiel , Germany
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Müscher-Polzin P, Näther C, Bensch W. Hexaniobate anions connected by [Ni(cyclam)] 2+ complexes yield two interpenetrating three-dimensional networks. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2020. [DOI: 10.1515/znb-2020-0043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Syntheses were performed at room temperature using Ni(NO3)2·6H2O, cyclam (cyclam = 1,4,8,11-tetraazacyclotetradecane) and the precursors Li8[Nb6O19]· ≈22H2O or Na7[HNb6O19]·15H2O in a DMSO-H2O mixture. Yellow crystals of the new compound {[Ni(cyclam)]2H4Nb6O19}·12H2O could be obtained after one week applying the Li+ or Na+ salt as starting materials. The crystal structure is unique in polyoxoniobate (PONb) chemistry and displays two interpenetrating three-dimensional (3D) networks. The [Nb6O19]8– anion is expanded by four Ni2+ centered complexes via Ni–O bonds to terminal O2− anions of the hexaniobate anion. The 3D networks are generated by further Ni–O bond formation between neighboring [Nb6O19]8− anions. The remaining void space is occupied by H2O molecules which form a water cluster.
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Affiliation(s)
- Philipp Müscher-Polzin
- Institut für Anorganische Chemie , Christian-Albrechts-Universität zu Kiel , Max-Eyth-Straße 2 , 24118 Kiel , Germany
| | - Christian Näther
- Institut für Anorganische Chemie , Christian-Albrechts-Universität zu Kiel , Max-Eyth-Straße 2 , 24118 Kiel , Germany
| | - Wolfgang Bensch
- Institut für Anorganische Chemie , Christian-Albrechts-Universität zu Kiel , Max-Eyth-Straße 2 , 24118 Kiel , Germany
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Lin YY, Zhang J, Zhu ZK, Sun YQ, Li XX, Zheng ST. An ultrastable {SiNb18O54}-based hybrid polyoxoniobate framework for selective removal of crystal violet from aqueous solution and proton-conduction. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.107766] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Yang Z, Shang J, He Y, Qiao Y, Ma P, Niu J, Wang J. A 1D Helical Chain Heterpolyniobate Templated by AsO 33. Inorg Chem 2020; 59:1967-1972. [PMID: 31940183 DOI: 10.1021/acs.inorgchem.9b03313] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel polyoxoniobate cluster directed by AsO33-, {[Cu(phen)]5[Nb6O19][As2Nb6O22]}2 (1a), has been successfully synthesized by a "two-pot" strategy, namely, the conventional aqueous solution and diffusional methods. It incorporates two {[Cu(phen)]2Nb6O19} and two {[Cu(phen)]3As2Nb6O22} subunits. Surprisingly, by changing the reaction conditions, one of the subunits {[Cu(phen)]2Nb6O19} was isolated as a guanidinium salt. These architectures were structurally characterized by single crystal X-ray diffraction, TGA, IR, elemental analysis and PXRD, etc. Furthermore, the behavior of 1 in aqueous solution was measured by electrospray ionization mass spectrometry, and the magnetic property in the low temperature range indicates the presence of antiferromagnetic interactions.
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Affiliation(s)
- Zongfei Yang
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering , Henan University , Kaifeng 475004 , Henan , People's Republic of China
| | - Jingjing Shang
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering , Henan University , Kaifeng 475004 , Henan , People's Republic of China
| | - Yuzan He
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering , Henan University , Kaifeng 475004 , Henan , People's Republic of China
| | - Yuanyuan Qiao
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering , Henan University , Kaifeng 475004 , Henan , People's Republic of China
| | - Pengtao Ma
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering , Henan University , Kaifeng 475004 , Henan , People's Republic of China
| | - Jingyang Niu
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering , Henan University , Kaifeng 475004 , Henan , People's Republic of China
| | - Jingping Wang
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering , Henan University , Kaifeng 475004 , Henan , People's Republic of China
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Makarova MV, Semenov SG, Bedrina ME, Titov AV. Quantum-Chemical Modeling of the First Coordination Sphere of the Metal Cation in Monazite. RUSS J GEN CHEM+ 2019. [DOI: 10.1134/s1070363219010316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Makarova MV, Semenov SG, Bedrina ME, Titov AV. Structure of the (O@Nb6O18)8– and (O@Ta6O18)8– Clusters: A Quantum-Chemical Study. RUSS J GEN CHEM+ 2018. [DOI: 10.1134/s1070363218110282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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Zhao S, Liang Z, Song L, Ma P, Zhang D, Wang J. A new organic-inorganic hybrid dimeric hexaniobate linked by Co-complex. INORG CHEM COMMUN 2016. [DOI: 10.1016/j.inoche.2016.10.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Liang Z, Zhang D, Ma P, Niu J, Wang J. A {Co4O4} Cubane Incorporated within a Polyoxoniobate Cluster. Chemistry 2015; 21:8380-3. [DOI: 10.1002/chem.201500289] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Indexed: 11/10/2022]
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Liang Z, Zhang D, Liu Q, Ma P, Niu J, Wang J. A novel transition-metal-linked hexaniobate cluster with photocatalytic H2 evolution activity. INORG CHEM COMMUN 2015. [DOI: 10.1016/j.inoche.2015.01.033] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Shen JQ, Wu Q, Zhang Y, Zhang ZM, Li YG, Lu Y, Wang EB. Unprecedented high-nuclear transition-metal-cluster-substituted heteropolyoxoniobates: synthesis by {V8 } ring insertion into the POM matrix and antitumor activities. Chemistry 2014; 20:2840-8. [PMID: 24590496 DOI: 10.1002/chem.201303995] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Revised: 11/30/2013] [Indexed: 11/06/2022]
Abstract
Reactions of hexaniobate with vanadate in the presence of Ni(2+) , Zn(2+) , or Cu(2+) have furnished three high-nuclear vanadium cluster-substituted heteropolyoxoniobates (HPNs): {Ni(en)3 }5 H{V(V) Nb8 V(IV) 8 O44 }⋅9 H2 O (1), (H2 en)Na2 [{Zn(en)2 (Hen)}{Zn(en)2 (H2 O)}2 {PNb8 V(IV) 8 O44 }]⋅11 H2 O (2), and Na{Cu(en)2 }3 {[Cu(en)2 ]2 [PNb8 V(IV) 8 O44 ]}⋅11 H2 O (3) (en=1,2-diaminoethane). Their structures have been determined and characterized by single-crystal X-ray diffraction analysis, thermogravimetric analysis (TGA), and elemental analysis. Structural analysis has revealed that compounds 1-3 contain similar {V8 }-substituted [X(V) Nb8 V(IV) 8 O44 ](11-) (X=P, V) clusters, obtained by inserting a {V8 } ring into tetravacant HPN [XNb8 O36 ](27-) . To the best of our knowledge, compounds 1-3 represent the first high-nuclear vanadium cluster-substituted HPNs, and compound 1 is the largest vanadoniobate cluster yet obtained in HPN chemistry. Nickel and zinc cations have been introduced into HPNs for the first time, which might promise a more diverse set of structures in this family. Antitumor studies have indicated that compounds 1 and 2 exhibit high activity against human gastric cancer SGC-7901 cells, SC-1680 cells, and MG-63 cells.
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Affiliation(s)
- Jian-Qiang Shen
- Key Laboratory of Polyoxometalate Science of Ministry of Education, Department of Chemistry, Northeast Normal University, Renmin Street No. 5268, Changchun, Jilin, 130024 (P.R. China)
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Guo G, Xu Y, Cao J, Hu C. The {V4Nb6O30} Cluster: A New Type of Vanadoniobate Anion Structure. Chemistry 2012; 18:3493-7. [DOI: 10.1002/chem.201103390] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2011] [Indexed: 11/08/2022]
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14
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Huang P, Qin C, Wang XL, Sun CY, Xing Y, Wang HN, Shao KZ, Su ZM. A new organic–inorganic hybrid based on the crescent-shaped polyoxoanion [H6SiNb18O54]8− and copper–organic cations. Dalton Trans 2012; 41:6075-7. [DOI: 10.1039/c2dt30265a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Wang ZL, Tan HQ, Chen WL, Li YG, Wang EB. A copper(ii)–ethylenediamine modified polyoxoniobate with photocatalytic H2 evolution activity under visible light irradiation. Dalton Trans 2012; 41:9882-4. [DOI: 10.1039/c2dt30663h] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Guo GL, Xu YQ, Chen BK, Hu CW. Three new polyoxoniobates constructed from Lindqvist-type hexaniobate and copper–amine complexes. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.561486] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Gui-Ling Guo
- a Department of Chemistry , Key Laboratory of Cluster Science, Ministry of Education of China, School of Science, Beijing Institute of Technology , Beijing 100081, P.R. China
| | - Yan-Qing Xu
- a Department of Chemistry , Key Laboratory of Cluster Science, Ministry of Education of China, School of Science, Beijing Institute of Technology , Beijing 100081, P.R. China
| | - Bao-Kuan Chen
- a Department of Chemistry , Key Laboratory of Cluster Science, Ministry of Education of China, School of Science, Beijing Institute of Technology , Beijing 100081, P.R. China
| | - Chang-Wen Hu
- a Department of Chemistry , Key Laboratory of Cluster Science, Ministry of Education of China, School of Science, Beijing Institute of Technology , Beijing 100081, P.R. China
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Matsumoto M, Ozawa Y, Yagasaki A. Which is the most basic oxygen in [Ta6O19]8−? — Synthesis and structural characterization of [H2Ta6O19]6−. INORG CHEM COMMUN 2011. [DOI: 10.1016/j.inoche.2010.09.045] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Tan H, Chen W, Liu D, Li Y, Wang E. A new polyoxoniobate with NbIVO8 center and Cu24 core. INORG CHEM COMMUN 2010. [DOI: 10.1016/j.inoche.2010.07.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Chen G, Ma P, Wang J, Niu J. A new organic–inorganic hybrid polyoxoniobate based on Lindqvist-type anion and nickel complex. J COORD CHEM 2010. [DOI: 10.1080/00958972.2010.520709] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Guo Chen
- a Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University , Kaifeng, Henan 475004, P.R. China
| | - Pengtao Ma
- a Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University , Kaifeng, Henan 475004, P.R. China
| | - Jingping Wang
- a Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University , Kaifeng, Henan 475004, P.R. China
| | - Jingyang Niu
- a Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University , Kaifeng, Henan 475004, P.R. China
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Si YL, Wang EB. Theoretical study of the electronic properties of peroxohexaniobate, [H3Nb6O13(O2)6]5−, by DFT. Mol Phys 2009. [DOI: 10.1080/00268970902953604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Anderson TM, Alam TM, Rodriguez MA, Bixler JN, Xu W, Parise JB, Nyman M. Cupric Siliconiobate. Synthesis and Solid-State Studies of a Pseudosandwich-Type Heteropolyanion. Inorg Chem 2008; 47:7834-9. [DOI: 10.1021/ic800860q] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Travis M. Anderson
- Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185, and Department of Chemistry and Geosciences, SUNY—Stony Brook, Stony Brook, New York 11794
| | - Todd M. Alam
- Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185, and Department of Chemistry and Geosciences, SUNY—Stony Brook, Stony Brook, New York 11794
| | - Mark A. Rodriguez
- Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185, and Department of Chemistry and Geosciences, SUNY—Stony Brook, Stony Brook, New York 11794
| | - Joel N. Bixler
- Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185, and Department of Chemistry and Geosciences, SUNY—Stony Brook, Stony Brook, New York 11794
| | - Wenqian Xu
- Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185, and Department of Chemistry and Geosciences, SUNY—Stony Brook, Stony Brook, New York 11794
| | - John B. Parise
- Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185, and Department of Chemistry and Geosciences, SUNY—Stony Brook, Stony Brook, New York 11794
| | - May Nyman
- Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185, and Department of Chemistry and Geosciences, SUNY—Stony Brook, Stony Brook, New York 11794
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Controlled Assembly of [Nb
6–
x
W
x
O
19
]
(8–
x
)–
(
x
= 0–4) Lindqvist Ions with (Amine)copper Complexes. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800415] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Dixit SS, Shashidhar MS. Inositol derived crown ethers: effect of auxiliary protecting groups and the relative orientation of crown ether oxygen atoms on their metal ion binding ability. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.12.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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25
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A novel Lindqvist type polyoxoniobate coordinated to four copper complex moieties: {Nb6O19[Cu(2,2′-bipy)]2[Cu(2,2′-bipy)2]2}·19H2O. INORG CHEM COMMUN 2008. [DOI: 10.1016/j.inoche.2007.10.015] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Bontchev RP, Venturini EL, Nyman M. Copper-Linked Hexaniobate Lindqvist ClustersVariations on a Theme. Inorg Chem 2007; 46:4483-91. [PMID: 17472371 DOI: 10.1021/ic0624118] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Four new one-dimensional materials and one dimer complex based on the linkage of [Nb6O19] clusters and [CuLx] (L=ethylenediamine (en), NH3, H2O) assemble under ambient conditions. These phases include the following: Rb4[Cu(en)2(H2O)2]3[(Nb6O19H2)2Cu(en)2].24H2O (1), space group P; [Cu(en)2(H2O)2]2[(Nb6O19H2)Cu(en)2].14H2O (2), space group P; Rb2[Cu(NH3)2(H2O)4][Cu(NH3)4(H2O)2]2{[Nb6O19][Cu(NH3)]2}(2).6H2O (3), space group P; {[Nb6O19][Cu(NH3)2(H2O)]2[Cu(H2O)4]2}.3H2O (4), space group P2/n; and {[Nb6O19][Cu(NH3)2(H2O)]2[Cu(H2O)4]2} (5), space group C2/m. All structures have been solved by single-crystal methods, and compounds 1-5 were characterized by thermogravimetric analysis, Fourier transform IR, chemical analysis, and magnetic measurements. It has been demonstrated that the conformation, charge, and geometry of the [Nb6O19]-[CuLx] chains can be modulated by varying the type and amount of the [CuLx]2+ species. The charge balance is provided by mixed Rb+/[CuLx]2+ or [CuLx]2+ cations only for structures 1-3, whereas 4 and 5 are neutral chains with no counterions. There are weak antiferromagnetic Cu2+-Cu2+ interactions in all phases. Compounds 2-5 represent the first examples in which the [Nb6O19] Lindqvist ion forms extended solids rather than dimers or decorated monomers when reacted with transition-metal, cationic complexes.
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Affiliation(s)
- Ranko P Bontchev
- Sandia National Laboratories, P.O. Box 5800, MS 0754, Albuquerque, New Mexico 87185, USA
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Anderson TM, Rodriguez MA, Bonhomme F, Bixler JN, Alam TM, Nyman M. An aqueous route to [Ta6O19]8– and solid-state studies of isostructural niobium and tantalum oxide complexes. Dalton Trans 2007:4517-22. [DOI: 10.1039/b707636c] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Solid-state Structures and Solution Behavior of Alkali Salts of the $$[\hbox{Nb}_{6}\hbox{O}_{19}]^{8-}$$ Lindqvist Ion. J CLUST SCI 2006. [DOI: 10.1007/s10876-006-0049-x] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Romba J, Kuppert D, Morgenstern B, Neis C, Steinhauser S, Weyhermüller T, Hegetschweiler K. The Coordination Chemistry of 1,4-Diazepan-6-amine. Eur J Inorg Chem 2006. [DOI: 10.1002/ejic.200500690] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Morgenstern B, Steinhauser S, Hegetschweiler K, Garribba E, Micera G, Sanna D, Nagy L. Complex Formation of Vanadium(IV) with 1,3,5-Triamino-1,3,5-trideoxy-cis-inositol and Related Ligands. Inorg Chem 2004; 43:3116-26. [PMID: 15132617 DOI: 10.1021/ic0352046] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The complex formation of vanadium(IV) with 1,3,5-triamino-1,3,5-trideoxy-cis-inositol (taci) and 1,3,5-trideoxy-1,3,5-tris(dimethylamino)-cis-inositol (tdci) was studied in aqueous solution and in the solid state. The formation constants of [V(IV)O(taci)](2+), [V(IV)O(tdci)](2+), and [V(IV)(tdci)(2)](4+) and of the deprotonation product [V(IV)(tdci)(2)H(-)(1)](3+) were determined (25 degrees C, 0.1 M KNO(3)). Cyclic voltammetry measurements established a reversible one-electron transfer for the [V(IV)(tdci)(2)H(-)(m)]((4)(-)(m))/[V(III)(tdci)(2)H(-)(n)]((3)(-)(n)) couple (0 <or= n, m <or= 6) with a strongly pH-dependent E(1/2)(obs) (+0.15 V at pH 5, -0.57 V at pH 13.5). Slightly more negative potentials were measured for the taci complexes. An additional quasi-reversible electron transfer at strongly positive potentials (1.2-0.5 V) was assigned to the [V(V)(taci)(2)H(-)(m)]((5)(-)(m))/[V(IV)(taci)(2)H(-)(n)]((4)(-)(n)) couple. The structures of [V(IV)(taci)(2)](SO(4))(2).12H(2)O (1), [V(IV)(tdci)(2)][V(4)(V)O(12)].14.5H(2)O (2), and [V(IV)(tdci)(2)H(-)(1)]Cl(3).15H(2)O (3) were determined by single-crystal X-ray analysis. The cations of 1-3 exhibit a structure of approximate D(3)(d) symmetry. The vanadium centers have an almost regular octahedral geometry. The coordinated oxygen donors are deprotonated, and their protons are transferred to the amino groups which act as internal bases. For both ligands, EPR measurements support the formation of non-oxo V(IV) complexes, with a d(z)2 ground state, in aqueous solution above pH 7. The spectral features are indicative of hexacoordinated complexes with a geometry distorted toward a trigonal prism. Finally, a mechanism is proposed for the decomposition of [V(IV)L(2)H(-)(x)]((4)(-)(x)) (L = taci and tdci) in strongly alkaline media (pH approximately 13).
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Affiliation(s)
- Bernd Morgenstern
- Anorganische Chemie, Universität des Saarlandes, Postfach 15 11 50, D-66041 Saarbrücken, Germany
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