1
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Capillary method and molecular dynamics study of the diffusion and molecular structures of vanadium(IV)-ligand complexes. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-07898-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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2
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Golovanov IS, Malykhin RS, Lesnikov VK, Nelyubina YV, Novikov VV, Frolov KV, Stadnichenko AI, Tretyakov EV, Ioffe SL, Sukhorukov AY. Revealing the Structure of Transition Metal Complexes of Formaldoxime. Inorg Chem 2021; 60:5523-5537. [PMID: 33826845 DOI: 10.1021/acs.inorgchem.0c03362] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Aerobic reactions of iron(III), nickel(II), and manganese(II) chlorides with formaldoxime cyclotrimer (tfoH3) and 1,4,7-triazacyclononane (tacn) produce indefinitely stable complexes of general formula [M(tacn)(tfo)]Cl. Although the formation of formaldoxime complexes has been known since the end of 19th century and applied in spectrophotometric determination of d-metals (formaldoxime method), the structure of these coordination compounds remained elusive until now. According to the X-ray analysis, [M(tacn)(tfo)]+ cation has a distorted adamantane-like structure with the metal ion being coordinated by three oxygen atoms of deprotonated tfoH3 ligand. The metal has a formal +4 oxidation state, which is atypical for organic complexes of iron and nickel. Electronic structure of [M(tacn)(tfo)]+ cations was studied by XPS, NMR, cyclic (CV) and differential pulse (DPV) voltammetries, Mössbauer spectroscopy, and DFT calculations. Unusual stabilization of high-valent metal ion by tfo3- ligand was explained by the donation of electron density from the nitrogen atom to the antibonding orbital of the metal-oxygen bond via hyperconjugation as confirmed by the NBO analysis. All complexes [M(tacn)(tfo)]Cl exhibited high catalytic activity in the aerobic dehydrogenative dimerization of p-thiocresol under ambient conditions.
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Affiliation(s)
- Ivan S Golovanov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow, Russia, 119991
| | - Roman S Malykhin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow, Russia, 119991
| | - Vladislav K Lesnikov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow, Russia, 119991
| | - Yulia V Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str. 28, Moscow, Russia, 119991
| | - Valentin V Novikov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str. 28, Moscow, Russia, 119991
| | - Kirill V Frolov
- Shubnikov Institute of Crystallography of FSRC "Crystallography and Photonics," Russian Academy of Sciences, Leninsky prospect, 59, Moscow, Russia, 119991
| | - Andrey I Stadnichenko
- Boreskov Institute of Catalysis, Siberian Branch of Russian Academy of Sciences, 5 Ac. Lavrentiev Avenue, Novosibirsk, Russia, 630090
| | - Evgeny V Tretyakov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow, Russia, 119991
| | - Sema L Ioffe
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow, Russia, 119991
| | - Alexey Yu Sukhorukov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow, Russia, 119991.,Plekhanov Russian University of Economics, Stremyanny per. 36, Moscow, Russia, 117997
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Banerjee A, Dash SP, Mohanty M, Sahu G, Sciortino G, Garribba E, Carvalho MFNN, Marques F, Costa Pessoa J, Kaminsky W, Brzezinski K, Dinda R. New V IV, V IVO, V VO, and V VO 2 Systems: Exploring their Interconversion in Solution, Protein Interactions, and Cytotoxicity. Inorg Chem 2020; 59:14042-14057. [PMID: 32914971 DOI: 10.1021/acs.inorgchem.0c01837] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The synthesis and characterization of one oxidoethoxidovanadium(V) [VVO(L1)(OEt)] (1) and two nonoxidovanadium(IV) complexes, [VIV(L2-3)2] (2 and 3), with aroylhydrazone ligands incorporating naphthalene moieties, are reported. The synthesized oxido and nonoxido vanadium complexes are characterized by various physicochemical techniques, and their molecular structures are solved by single crystal X-ray diffraction (SC-XRD). This revealed that in 1 the geometry around the vanadium atom corresponds to a distorted square pyramid, with a O4N coordination sphere, whereas that of the two nonoxido VIV complexes 2 and 3 corresponds to a distorted trigonal prismatic arrangement with a O4N2 coordination sphere around each "bare" vanadium center. In aqueous solution, the VVO moiety of 1 undergoes a change to VVO2 species, yielding [VVO2(L1)]- (1'), while the nonoxido VIV-compounds 2 and 3 are partly converted into their corresponding VIVO complexes, [VIVO(L2-3)(H2O)] (2' and 3'). Interaction of these VVO2, VIVO, and VIV systems with two model proteins, ubiquitin (Ub) and lysozyme (Lyz), is investigated through docking approaches, which suggest the potential binding sites: the interaction is covalent for species 2' and 3', with the binding to Glu16, Glu18, and Asp21 for Ub, and His15 for Lyz, and it is noncovalent for species 1', 2, and 3, with the surface residues of the proteins. The ligand precursors and complexes are also evaluated for their in vitro antiproliferative activity against ovarian (A2780) and prostate (PC3) human cancer cells and in normal fibroblasts (V79) to check the selectivity of the compounds for cancer cells.
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Affiliation(s)
- Atanu Banerjee
- Department of Chemistry, National Institute of Technology, Rourkela, 769008 Odisha, India
| | - Subhashree P Dash
- Department of Chemistry, National Institute of Technology, Rourkela, 769008 Odisha, India
| | - Monalisa Mohanty
- Department of Chemistry, National Institute of Technology, Rourkela, 769008 Odisha, India
| | - Gurunath Sahu
- Department of Chemistry, National Institute of Technology, Rourkela, 769008 Odisha, India
| | - Giuseppe Sciortino
- Dipartimento di Chimica e Farmacia, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy.,Departament de Química, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallés, Barcelona, Spain
| | - Eugenio Garribba
- Dipartimento di Chimica e Farmacia, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - M Fernanda N N Carvalho
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Fernanda Marques
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal
| | - João Costa Pessoa
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Werner Kaminsky
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195, United States
| | - Krzysztof Brzezinski
- Faculty of Chemistry, University of Bialystok, Ciolkowskiego 1K, 15-245, Bialystok, Poland
| | - Rupam Dinda
- Department of Chemistry, National Institute of Technology, Rourkela, 769008 Odisha, India
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Stinghen D, Atzori M, Fernandes CM, Ribeiro RR, de Sá EL, Back DF, Giese SOK, Hughes DL, Nunes GG, Morra E, Chiesa M, Sessoli R, Soares JF. A Rare Example of Four-Coordinate Nonoxido Vanadium(IV) Alkoxide in the Solid State: Structure, Spectroscopy, and Magnetization Dynamics. Inorg Chem 2018; 57:11393-11403. [PMID: 30160486 DOI: 10.1021/acs.inorgchem.8b01117] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The distorted tetrahedral [V(OAd)4] alkoxide (OAd = 1-adamantoxide, complex 1) is the first homoleptic, mononuclear vanadium(IV) alkoxide to be characterized in the solid state by X-ray diffraction analysis. The compound crystallizes in the cubic P4̅3 n space group with two highly disordered, crystallographically independent molecules in the asymmetric unit. Spin Hamiltonian parameters extracted from low temperature X- and Q-band electron paramagnetic resonance (EPR) experiments performed for polycrystalline samples of 1, both in the concentrated (bulk) form and diluted in the diamagnetic [Ti(OAd)4] analogue, reveal a fully axial system with g z < g x, g y and A z ≫ A x, A y. Complex 1 has also been characterized by alternate current susceptometry with varying temperature (3-30 K) and static magnetic field (up to 8.5 T), showing field-induced slow relaxation of the magnetization with relaxation times ranging from ca. 3 ms at 3 K to 0.02-0.03 ms at 30 K, in line with relevant results described recently for other potential molecular quantum bits. Pulsed EPR measurements, in turn, disclosed long coherence times of ca. 4 μs at temperatures lower than 40 K, despite the presence of the H-rich ligands. The slow spin relaxation in 1 is the first observed for a tetracoordinate nonoxido vanadium(IV) complex, and results are compared here to those generated by square-pyramidal VIV(O)2+ and trigonal prismatic V4+ with oxygen donor atom sets. Considering that the number of promising d1 complexes investigated in detail for slow magnetization dynamics is still small, the present work contributes to the establishment of possible structural/electronic correlations of interest to the field of quantum information processing.
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Affiliation(s)
- Danilo Stinghen
- Departamento de Química , Universidade Federal do Paraná, Centro Politécnico, Jardim das Américas , 81530-900 Curitiba , Paraná , Brazil
| | - Matteo Atzori
- Dipartimento di Chimica "Ugo Schiff" and INSTM RU , Università degli Studi di Firenze , Via della Lastruccia 3 , 50019 Sesto Fiorentino (FI) , Italy
| | - Caprici M Fernandes
- Departamento de Química , Universidade Federal do Paraná, Centro Politécnico, Jardim das Américas , 81530-900 Curitiba , Paraná , Brazil
| | - Ronny R Ribeiro
- Departamento de Química , Universidade Federal do Paraná, Centro Politécnico, Jardim das Américas , 81530-900 Curitiba , Paraná , Brazil
| | - Eduardo L de Sá
- Departamento de Química , Universidade Federal do Paraná, Centro Politécnico, Jardim das Américas , 81530-900 Curitiba , Paraná , Brazil
| | - Davi F Back
- Departamento de Química , Universidade Federal de Santa Maria , Camobi, 97105-900 Santa Maria , Rio Grande do Sul , Brazil
| | - Siddhartha O K Giese
- Departamento de Química , Universidade Federal do Paraná, Centro Politécnico, Jardim das Américas , 81530-900 Curitiba , Paraná , Brazil
| | - David L Hughes
- School of Chemistry , University of East Anglia , Norwich NR4 7TJ , U.K
| | - Giovana G Nunes
- Departamento de Química , Universidade Federal do Paraná, Centro Politécnico, Jardim das Américas , 81530-900 Curitiba , Paraná , Brazil
| | - Elena Morra
- Dipartimento di Chimica e NIS Centre , Università di Torino , Via P. Giuria 7 , I10125 Torino , Italy
| | - Mario Chiesa
- Dipartimento di Chimica e NIS Centre , Università di Torino , Via P. Giuria 7 , I10125 Torino , Italy
| | - Roberta Sessoli
- Dipartimento di Chimica "Ugo Schiff" and INSTM RU , Università degli Studi di Firenze , Via della Lastruccia 3 , 50019 Sesto Fiorentino (FI) , Italy
| | - Jaísa F Soares
- Departamento de Química , Universidade Federal do Paraná, Centro Politécnico, Jardim das Américas , 81530-900 Curitiba , Paraná , Brazil
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5
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Kelley SP, Berton P, Metlen A, Rogers RD. Polyoxometalate catalysts for biomass dissolution: understanding and design. PHYSICAL SCIENCES REVIEWS 2018. [DOI: 10.1515/psr-2017-0190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The use of polyoxometalate catalysts for selective delignification of biomass presents a possible route toward using ionic liquids (ILs) to efficiently obtain high-molecular weight biopolymers from biomass. Rapid progress in this area will depend on recognizing and using the link with already well-developed inorganic chemistry in ILs pursued outside the field of biomass processing. Here, we use crystal structures determined from single crystal X-ray diffraction to better understand the behavior of [PV2Mo10O40]5-, a polyoxometalate catalyst known for its ability to promote selective delignification of biomass in the IL 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]). The crystal structure of [C2mim]5[PV2Mo10O40]·THF shows the formation of cationic shells around the anions which are likely representative of the interactions of this catalyst with [C2mim][OAc] itself. The reaction of NH4VO3 with [C2mim][OAc] is explored to better understand the chemistry of vanadium(V), which is critical to redox catalysis of [PV2Mo10O40]5-. This reaction gives crystals of [C2mim]4[V4O12], showing that this IL forms discrete metavanadates which are obtained from aqueous solutions in a specific pH range and indicating that the basicity of [OAc]- dominates the speciation of vanadium (V) in this IL.
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6
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Sanna D, Ugone V, Sciortino G, Parker BF, Zhang Z, Leggett CJ, Arnold J, Rao L, Garribba E. V
IV
O and V
IV
Species Formed in Aqueous Solution by the Tridentate Glutaroimide–Dioxime Ligand – An Instrumental and Computational Characterization. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800090] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Daniele Sanna
- Istituto CNR di Chimica Biomolecolare Trav. La Crucca 3 07040 Sassari Italy
| | - Valeria Ugone
- Dipartimento di Chimica e Farmacia Università di Sassari Via Vienna 2 07100 Sassari Italy
| | - Giuseppe Sciortino
- Dipartimento di Chimica e Farmacia Università di Sassari Via Vienna 2 07100 Sassari Italy
- Departament de Química Universitat Autònoma de Barcelona Cerdanyola del Vallés 08193 Barcelona Spain
| | - Bernard F. Parker
- Chemical Sciences Division Lawrence Berkeley National Laboratory 1 Cyclotron Road 94720 Berkeley CA United States
- Department of Chemistry University of California 94720 Berkeley CA United States
| | - Zhicheng Zhang
- Chemical Sciences Division Lawrence Berkeley National Laboratory 1 Cyclotron Road 94720 Berkeley CA United States
| | - Christina J. Leggett
- Chemical Sciences Division Lawrence Berkeley National Laboratory 1 Cyclotron Road 94720 Berkeley CA United States
| | - John Arnold
- Chemical Sciences Division Lawrence Berkeley National Laboratory 1 Cyclotron Road 94720 Berkeley CA United States
- Department of Chemistry University of California 94720 Berkeley CA United States
| | - Linfeng Rao
- Chemical Sciences Division Lawrence Berkeley National Laboratory 1 Cyclotron Road 94720 Berkeley CA United States
| | - Eugenio Garribba
- Dipartimento di Chimica e Farmacia Università di Sassari Via Vienna 2 07100 Sassari Italy
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7
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Das M, Ghosh AK, Clérac R, Mathonière C, Ray D. Ligand exchange reaction in open-face [Cu 4 (µ 3 -OH) 2 ] cubane aggregates: Synthesis, structural change and difference in magnetic interactions. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.02.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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8
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Sanna D, Serra M, Ugone V, Manca L, Pirastru M, Buglyó P, Bíró L, Micera G, Garribba E. Biorelevant reactions of the potential anti-tumor agent vanadocene dichloride. Metallomics 2017; 8:532-41. [PMID: 27121101 DOI: 10.1039/c6mt00002a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The interaction of the potential anti-tumor agent vanadocene dichloride ([Cp2VCl2] or VDC) with some relevant bioligands of the cytosol such as proteins (Hb), amino acids (glycine and histidine), NADH derivatives (NADH, NADPH, NAD(+) and NADP(+)), reductants (GSH and ascorbic acid), phosphates (HPO4(2-), P2O7(4-), cAMP, AMP, ADP and ATP) and carboxylate derivatives (lactate) and its uptake by red blood cells were studied. The results indicated that [Cp2VCl2] transforms at physiological pH into [Cp2V(OH)2] and that only HPO4(2-), P2O7(4-), lactate, ATP and ADP form mixed species with the [Cp2V](2+) moiety replacing the two hydroxide ions. EPR and electronic absorption spectroscopy, agarose gel electrophoresis and spin trapping measurements allow excluding any direct interaction and/or intercalation with DNA and the formation of reactive oxygen species (ROS) in Fenton-like reactions. Uptake experiments by erythrocytes suggested that VDC crosses the membrane and enters inside the cells, whereas 'bare' V(IV) transforms into V(IV)O species with loss of the two cyclopentadienyl rings. This transformation in the cellular environment could be related to the mechanism of action of VDC.
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Affiliation(s)
- Daniele Sanna
- Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, UOS di Sassari, Trav. La Crucca 3, I-07040 Sassari, Italy
| | - Maria Serra
- Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, UOS di Sassari, Trav. La Crucca 3, I-07040 Sassari, Italy
| | - Valeria Ugone
- Dipartimento di Chimica e Farmacia, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy.
| | - Laura Manca
- Dipartimento di Scienze Biomediche, Università di Sassari, Via Muroni 25, I-07100 Sassari, Italy
| | - Monica Pirastru
- Dipartimento di Scienze Biomediche, Università di Sassari, Via Muroni 25, I-07100 Sassari, Italy
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry, University of Debrecen, P.O. Box 21, H-4010 Debrecen, Hungary
| | - Linda Bíró
- Department of Inorganic and Analytical Chemistry, University of Debrecen, P.O. Box 21, H-4010 Debrecen, Hungary
| | - Giovanni Micera
- Dipartimento di Chimica e Farmacia, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy.
| | - Eugenio Garribba
- Dipartimento di Chimica e Farmacia, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy.
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Mistri S, Zangrando E, Vojtíšek P, Manna SC. 1D, 2D, and 2D Parallel Interpenetrated Dicarboxylato Bridged Co(II) Metal Organic Frameworks: Synthesis, Crystal Structure, Fluorescence Sensing and Band Gap Calculation. ChemistrySelect 2017. [DOI: 10.1002/slct.201700237] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Soumen Mistri
- Department of Chemistry and Chemical Technology; Vidyasagar University; Midnapore 721102, West Bengal India
| | - Ennio Zangrando
- Department of Chemical and Pharmaceutical Sciences; University of Trieste; 34127 Trieste Italy
| | - Pavel Vojtíšek
- Department of Inorganic Chemistry; Charles University in Prague; Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Subal Chandra Manna
- Department of Chemistry and Chemical Technology; Vidyasagar University; Midnapore 721102, West Bengal India
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10
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Guo HY, Zhang TT, Lin PH, Xiao-Zhang XZ, Cui XB, Huo QS, Xu JQ. Preparation, structure and characterization of a series of vanadates. CrystEngComm 2017. [DOI: 10.1039/c6ce02205g] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Parker BF, Zhang Z, Leggett CJ, Arnold J, Rao L. Kinetics of complexation of V(v), U(vi), and Fe(iii) with glutaroimide-dioxime: studies by stopped-flow and conventional absorption spectroscopy. Dalton Trans 2017; 46:11084-11096. [DOI: 10.1039/c7dt01597f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stopped-flow and conventional kinetic experiments were conducted to compare the rates of complexation of glutaroimide-dioxime with V(v), U(vi), and Fe(iii) to support efficient seawater recovery of uranium.
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Affiliation(s)
- Bernard F. Parker
- Department of Chemistry
- University of California – Berkeley
- Berkeley
- USA
- Chemical Sciences Division
| | - Zhicheng Zhang
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | - Christina J. Leggett
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
- U. S. Nuclear Regulatory Commission
| | - John Arnold
- Department of Chemistry
- University of California – Berkeley
- Berkeley
- USA
- Chemical Sciences Division
| | - Linfeng Rao
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
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Sanna D, Sciortino G, Ugone V, Micera G, Garribba E. Nonoxido V(IV) Complexes: Prediction of the EPR Spectrum and Electronic Structure of Simple Coordination Compounds and Amavadin. Inorg Chem 2016; 55:7373-87. [PMID: 27399275 DOI: 10.1021/acs.inorgchem.6b00409] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Density functional theory (DFT) calculations of the (51)V hyperfine coupling (HFC) tensor A have been completed for 20 "bare" V(IV) complexes with different donor sets, electric charges, and coordination geometries. Calculations were performed with ORCA and Gaussian software, using functionals BP86, TPSS0, B1LYP, PBE0, B3LYP, B3P, B3PW, O3LYP, BHandHLYP, BHandH, and B2PLYP. Among the basis sets, 6-311g(d,p), 6-311++g(d,p), VTZ, cc-pVTZ, def2-TZVPP, and the "core properties" CP(PPP) were tested. The experimental Aiso and Ai (where i = x or z, depending on the geometry and electronic structure of V(IV) complex) were compared with the values calculated by DFT methods. The results indicated that, based on the mean absolute percentage deviation (MAPD), the best functional to predict Aiso or Ai is the double hybrid B2PLYP. With this functional and the basis set VTZ, it is possible to predict the Aiso and Az of the EPR spectrum of amavadin with deviations of -1.1% and -2.0% from the experimental values. The results allowed us to divide the spectra of nonoxido V(IV) compounds in three types-called "type 1", "type 2", and "type 3", characterized by different composition of the singly occupied molecular orbital (SOMO) and relationship between the values of Ax, Ay, and Az. For "type 1" spectra, Az ≫ Ax ≈ Ay and Az is in the range of (135-155) × 10(-4) cm(-1); for "type 2" spectra, Ax ≈ Ay ≫ Az and Ax ≈ Ay are in the range of (90-120) × 10(-4) cm(-1); and for the intermediate spectra of "type 3", Az > Ay > Ax or Ax > Ay > Az, with Az or Ax values in the range of (120-135) × 10(-4) cm(-1). The electronic structure of the V(IV) species was also discussed, and the results showed that the values of Ax or Az are correlated with the percent contribution of V-dxy orbital in the SOMO. Similarly to V(IV)O species, for amavadin the SOMO is based mainly on the V-dxy orbital, and this accounts for the large experimental value of Az (153 × 10(-4) cm(-1)).
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Affiliation(s)
- Daniele Sanna
- Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, UOS di Sassari, Trav. La Crucca 3, I-07040 Sassari, Italy
| | - Giuseppe Sciortino
- Dipartimento di Chimica e Farmacia, Università di Sassari , Via Vienna 2, I-07100 Sassari, Italy
| | - Valeria Ugone
- Dipartimento di Chimica e Farmacia, Università di Sassari , Via Vienna 2, I-07100 Sassari, Italy
| | - Giovanni Micera
- Dipartimento di Chimica e Farmacia, Università di Sassari , Via Vienna 2, I-07100 Sassari, Italy
| | - Eugenio Garribba
- Dipartimento di Chimica e Farmacia, Università di Sassari , Via Vienna 2, I-07100 Sassari, Italy
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13
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Leggett CJ, Parker BF, Teat SJ, Zhang Z, Dau PD, Lukens WW, Peterson SM, Cardenas AJP, Warner MG, Gibson JK, Arnold J, Rao L. Structural and spectroscopic studies of a rare non-oxido V(v) complex crystallized from aqueous solution. Chem Sci 2016; 7:2775-2786. [PMID: 28660055 PMCID: PMC5477013 DOI: 10.1039/c5sc03958d] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 01/14/2016] [Indexed: 11/21/2022] Open
Abstract
A non-oxido V(v) complex with glutaroimide-dioxime (H3L), a ligand for recovering uranium from seawater, was synthesized from aqueous solution as Na[V(L)2]·2H2O, and the structure determined by X-ray diffraction. It is the first non-oxido V(v) complex that has been directly synthesized in and crystallized from aqueous solution. The distorted octahedral structure contains two fully deprotonated ligands (L3-) coordinating to V5+, each in a tridentate mode via the imide N (R V-N = 1.96 Å) and oxime O atoms (R V-O = 1.87-1.90 Å). Using 17O-labelled vanadate as the starting material, concurrent 17O/51V/1H/13C NMR, in conjunction with ESI-MS, unprecedentedly demonstrated the stepwise displacement of the oxido V[double bond, length as m-dash]O bonds by glutaroimide-dioxime and verified the existence of the "bare" V5+/glutaroimide-dioxime complex, [V(L)2]-, in aqueous solution. In addition, the crystal structure of an intermediate 1 : 1 V(v)/glutaroimide-dioxime complex, [VO2(HL)]-, in which the oxido bonds of vanadate are only partially displaced, corroborates the observations by NMR and ESI-MS. Results from this work provide important insights into the strong sorption of vanadium on poly(amidoxime) sorbents in the recovery of uranium from seawater. Also, because vanadium plays important roles in biological systems, the syntheses of the oxido and non-oxido V5+ complexes and the unprecedented demonstration of the displacement of the oxido V[double bond, length as m-dash]O bonds help with the on-going efforts to develop new vanadium compounds that could be of importance in biological applications.
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Affiliation(s)
- C J Leggett
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , 1 Cyclotron Road , Berkeley , CA 94720 , USA .
| | - B F Parker
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , 1 Cyclotron Road , Berkeley , CA 94720 , USA .
- Department of Chemistry , University of California - Berkeley , Berkeley , CA 94720 , USA
| | - S J Teat
- Advanced Light Source , Lawrence Berkeley National Laboratory , 1 Cyclotron Road , Berkeley , CA 94720 , USA .
| | - Z Zhang
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , 1 Cyclotron Road , Berkeley , CA 94720 , USA .
| | - P D Dau
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , 1 Cyclotron Road , Berkeley , CA 94720 , USA .
| | - W W Lukens
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , 1 Cyclotron Road , Berkeley , CA 94720 , USA .
| | - S M Peterson
- National Security Directorate , Pacific Northwest National Laboratory , 902 Battelle Blvd. , Richland , WA 99352 , USA
| | - A J P Cardenas
- Fundamental and Computational Sciences Directorate , Pacific Northwest National Laboratory , 902 Battelle Blvd. , Richland , WA 99352 , USA
| | - M G Warner
- National Security Directorate , Pacific Northwest National Laboratory , 902 Battelle Blvd. , Richland , WA 99352 , USA
| | - J K Gibson
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , 1 Cyclotron Road , Berkeley , CA 94720 , USA .
| | - J Arnold
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , 1 Cyclotron Road , Berkeley , CA 94720 , USA .
- Department of Chemistry , University of California - Berkeley , Berkeley , CA 94720 , USA
| | - L Rao
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , 1 Cyclotron Road , Berkeley , CA 94720 , USA .
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14
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Dash SP, Majumder S, Banerjee A, Carvalho MFNN, Adão P, Pessoa JC, Brzezinski K, Garribba E, Reuter H, Dinda R. Chemistry of Monomeric and Dinuclear Non-Oxido Vanadium(IV) and Oxidovanadium(V) Aroylazine Complexes: Exploring Solution Behavior. Inorg Chem 2016; 55:1165-82. [PMID: 26789655 DOI: 10.1021/acs.inorgchem.5b02346] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A series of mononuclear non-oxido vanadium(IV) [V(IV)(L(1-4))2] (1-4), oxidoethoxido vanadium(V) [V(V)O(L(1-4))(OEt)] (5-8), and dinuclear μ-oxidodioxidodivanadium(V) [V(V)2O3(L(1))2] (9) complexes with tridentate aroylazine ligands are reported [H2L(1) = 2-furoylazine of 2-hydroxy-1-acetonaphthone, H2L(2) = 2-thiophenoylazine of 2-hydroxy-1-acetonaphthone, H2L(3) = 1-naphthoylazine of 2-hydroxy-1-acetonaphthone, H2L(4) = 3-hydroxy-2-naphthoylazine of 2-hydroxy-1-acetonaphthone]. The complexes are characterized by elemental analysis, by various spectroscopic techniques, and by single-crystal X-ray diffraction (for 2, 3, 5, 6, 8, and 9). The non-oxido V(IV) complexes (1-4) are quite stable in open air as well as in solution, and DFT calculations allow predicting EPR and UV-vis spectra and the electronic structure. The solution behavior of the [V(V)O(L(1-4))(OEt)] compounds (5-8) is studied confirming the formation of at least two different types of V(V) species in solution, monomeric corresponding to 5-8, and μ-oxidodioxidodivanadium [V(V)2O3(L(1-4))2] compounds. The μ-oxidodioxidodivanadium compound [V(V)2O3(L(1))2] (9), generated from the corresponding mononuclear complex [V(V)O(L(1))(OEt)] (5), is characterized in solution and in the solid state. The single-crystal X-ray diffraction analyses of the non-oxido vanadium(IV) compounds (2 and 3) show a N2O4 binding set and a trigonal prismatic geometry, and those of the V(V)O complexes 5, 6, and 8 and the μ-oxidodioxidodivanadium(V) (9) reveal that the metal center is in a distorted square pyramidal geometry with O4N binding sets. For the μ-oxidodioxidodivanadium species in equilibrium with 5-8 in CH2Cl2, no mixed-valence complexes are detected by chronocoulometric and EPR studies. However, upon progressive transfer of two electrons, two distinct monomeric V(IV)O species are detected and characterized by EPR spectroscopy and DFT calculations.
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Affiliation(s)
- Subhashree P Dash
- Department of Chemistry, National Institute of Technology , Rourkela 769008, Odisha, India
| | - Sudarshana Majumder
- Department of Chemistry, National Institute of Technology , Rourkela 769008, Odisha, India
| | - Atanu Banerjee
- Department of Chemistry, National Institute of Technology , Rourkela 769008, Odisha, India
| | - M Fernanda N N Carvalho
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa , Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Pedro Adão
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa , Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - João Costa Pessoa
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa , Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Krzysztof Brzezinski
- Institute of Chemistry, University of Bialystok , Hurtowa 1, 5-399 Bialystok, Poland
| | - Eugenio Garribba
- Dipartimento di Chimica e Farmacia, Università di Sassari , Via Vienna 2, I-07100 Sassari, Italy
| | - Hans Reuter
- Institute of Chemistry of New Materials, University of Osnabrück , Barbarastrasse 7, 49067 Osnabrück, Germany
| | - Rupam Dinda
- Department of Chemistry, National Institute of Technology , Rourkela 769008, Odisha, India
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15
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Neis C, Morgenstern B, Hegetschweiler K. Hydrogen-bonding patterns in bis[2,4,6-triazaniumylcyclohexane-1,3,5-tris(olate)-κ 3O, O′, O′′]germanium(IV) tetrachloride hexahydrate. Acta Crystallogr C 2016; 72:28-34. [DOI: 10.1107/s2053229615023165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 12/02/2015] [Indexed: 11/10/2022] Open
Abstract
A first preliminary report on the crystal structure of a hydrated salt formulated as [Ge(taci)2]Cl4·13H2O (taci is 1,3,5-triamino-1,3,5-trideoxy-cis-inositol) appeared more than 20 years ago [Ghisletta (1994). PhD thesis, ETH Zürich. Switzerland]. At that time it was not possible to discriminate unambiguously between the positions of some of the chloride ions and water O atoms, and disorder was thus postulated. In a new determination, a conclusive scheme of hydrogen bonding proves to be a particularly appealing aspect of the structure. Single crystals of the title compound, C12H30GeN6O64+·4Cl−·6H2O or [Ge(taci)2]2Cl8·12H2O, were grown from an aqueous solution by slow evaporation of the solvent. The two [Ge(taci)2]4+cations exhibit a double-adamantane-type structure with exclusive O-atom coordination and approximateD3dsymmetry. The taci ligands adopt a zwitterionic form with deprotonated hydroxy groups and protonated amino groups. Both cations are hydrogen bonded to six water molecules. The structure of the hydration shell of the two cations is, however, slightly different. The {[Ge(taci)2]·6H2O}4+aggregates are interlinked in all three dimensions by further hydrogen bonds of the types N—H...Cl...H—N, N—H...O(H)2...H—N, (Ge)O...H—O(H)...H—N, N—H...O(H)—H...Cl...H—N, (Ge)O...H—O—H...Cl...H—N, N—H...O(H)—H...Cl...H—(H)O...H—N, (Ge)O...H—O—H...Cl...H—(H)O...H—N and Ge(O)...H—O—H...Cl...H—O—H...O(Ge).
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16
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Maurya MR, Uprety B, Avecilla F, Adão P, Costa Pessoa J. Vanadium(V) complexes of a tripodal ligand, their characterisation and biological implications. Dalton Trans 2015; 44:17736-55. [PMID: 26399883 DOI: 10.1039/c5dt02716k] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of the tripodal tetradentate dibasic ligand 6,6'-(2-(pyridin-2-yl)ethylazanediyl)bis(methylene)bis(2,4-di-tert-butylphenol), H2L(1)I, with [V(IV)O(acac)2] in CH3CN gives the V(V)O-complex, [V(V)O(acac)(L(1))] 1. Crystallisation of 1 in CH3CN at ∼0 °C gives dark blue crystals of 1, while at room temperature it affords dark green crystals of [{V(V)O(L(1))}2μ-O] 3. Upon prolonged treatment of 1 in MeOH, [V(V)O(OMe)(MeOH)(L(1))] 2 is obtained. All three complexes were analysed by single-crystal X-ray diffraction, depicting a distorted octahedral geometry around vanadium. In the reaction of H2L(1) with V(IV)OSO4 partial hydrolysis of the tripodal ligand results in the elimination of the pyridyl fragment of L(1) and the formation of H[V(V)O2(L(2))] 4 containing the ONO tridentate ligand 6,6'-azanediylbis(methylene)bis(2,4-di-tert-butylphenol), H2L(2)II. Compound 4, which was not fully characterised, undergoes dimerization in acetone yielding the hydroxido-bridged [{V(V)O(L(2))}2μ-(OH)2] 5 having a distorted octahedral geometry around each vanadium. In contrast, from a solution of 4 in acetonitrile, the dinuclear compound [{V(V)O(L(2))}2μ-O] 6 is obtained, with a trigonal bipyramidal geometry around each vanadium. The methoxido complex 2 is successfully employed as a functional catechol-oxidase mimic in the oxidation of catechol to o-quinone under air. The process was confirmed to follow a Michaelis-Menten type kinetics with respect to catechol, the Vmax and KM values obtained being 7.66 × 10(-6) M min(-1) and 0.0557 M, respectively, and the turnover frequency is 0.0541 min(-1). A similar reaction with the bulkier 3,5-di-tert-butylcatechol proceeded at a much slower rate. Complex 2 was also used as a catalyst precursor for the oxidative bromination of thymol in aqueous medium. The selectivity shows quite interesting trends, namely when not using excess of the primary oxidizing agent, H2O2, the para mono-brominated product corresponds to ∼93% of the products and no dibromo derivative is formed.
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Affiliation(s)
- Mannar R Maurya
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, India.
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17
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Sanna D, Ugone V, Micera G, Pivetta T, Valletta E, Garribba E. Speciation of the Potential Antitumor Agent Vanadocene Dichloride in the Blood Plasma and Model Systems. Inorg Chem 2015; 54:8237-50. [DOI: 10.1021/acs.inorgchem.5b01277] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Daniele Sanna
- Istituto CNR di Chimica Biomolecolare, Trav. La Crucca 3, I-07040 Sassari, Italy
| | - Valeria Ugone
- Dipartimento di Chimica
e Farmacia and Centro Interdisciplinare per lo Sviluppo della Ricerca
Biotecnologica e per lo Studio della Biodiversità della Sardegna, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - Giovanni Micera
- Dipartimento di Chimica
e Farmacia and Centro Interdisciplinare per lo Sviluppo della Ricerca
Biotecnologica e per lo Studio della Biodiversità della Sardegna, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - Tiziana Pivetta
- Dipartimento di Scienze
Chimiche e Geologiche, Università di Cagliari, Cittadella Universitaria, I-09042 Monserrato, Cagliari, Italy
| | - Elisa Valletta
- Dipartimento di Scienze
Chimiche e Geologiche, Università di Cagliari, Cittadella Universitaria, I-09042 Monserrato, Cagliari, Italy
| | - Eugenio Garribba
- Dipartimento di Chimica
e Farmacia and Centro Interdisciplinare per lo Sviluppo della Ricerca
Biotecnologica e per lo Studio della Biodiversità della Sardegna, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
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18
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Kundu S, Mondal D, Bhattacharya K, Endo A, Sanna D, Garribba E, Chaudhury M. Nonoxido Vanadium(IV) Compounds Involving Dithiocarbazate-Based Tridentate ONS Ligands: Synthesis, Electronic and Molecular Structure, Spectroscopic and Redox Properties. Inorg Chem 2015; 54:6203-15. [DOI: 10.1021/acs.inorgchem.5b00359] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sanchita Kundu
- Department
of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Dhrubajyoti Mondal
- Department
of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Kisholoy Bhattacharya
- Department
of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Akira Endo
- Department
of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo 102-8554, Japan
| | - Daniele Sanna
- Istituto CNR di
Chimica
Biomolecolare, Trav. La Crucca 3, I-07040 Sassari, Italy
| | - Eugenio Garribba
- Dipartimento
di Chimica e Farmacia and Centro Interdisciplinare per lo Sviluppo
della Ricerca Biotecnologica e per lo Studio della Biodiversità
della Sardegna, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - Muktimoy Chaudhury
- Department
of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700032, India
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19
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Cantillo D, Damm M, Dallinger D, Bauser M, Berger M, Kappe CO. Sequential Nitration/Hydrogenation Protocol for the Synthesis of Triaminophloroglucinol: Safe Generation and Use of an Explosive Intermediate under Continuous-Flow Conditions. Org Process Res Dev 2014. [DOI: 10.1021/op5001435] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- David Cantillo
- Institute of Chemistry, University of Graz, Heinrichstrasse 28, A-8010 Graz, Austria
| | - Markus Damm
- Institute of Chemistry, University of Graz, Heinrichstrasse 28, A-8010 Graz, Austria
| | - Doris Dallinger
- Institute of Chemistry, University of Graz, Heinrichstrasse 28, A-8010 Graz, Austria
| | - Marcus Bauser
- Global
Drug Discovery, Medicinal Chemistry, Bayer HealthCare, D-13353 Berlin, Germany
| | - Markus Berger
- Global
Drug Discovery, Medicinal Chemistry, Bayer HealthCare, D-13353 Berlin, Germany
| | - C. Oliver Kappe
- Institute of Chemistry, University of Graz, Heinrichstrasse 28, A-8010 Graz, Austria
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20
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Yoshikawa Y, Sakurai H, Crans DC, Micera G, Garribba E. Structural and redox requirements for the action of anti-diabetic vanadium compounds. Dalton Trans 2014; 43:6965-72. [PMID: 24668346 DOI: 10.1039/c3dt52895b] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study presents the first systematic investigation of the anti-diabetic properties of non-oxido V(IV) complexes. In particular, the insulin-mimetic activity of [V(IV)(taci)2](4+), [V(IV)(inoH-3)2](2-), [V(IV)(dhab)2], [V(IV)(hyph(Ph))2], [V(IV)(cat)3](2-) and [V(IV)(pdbh)2]--where taci is 1,3,5-triamino-1,3,5-trideoxy-cis-inositol, ino is cis-inositol, H2dhab is 2,2'-dihydroxyazobenzene, H2hyph(Ph) is 3,5-bis(2-hydroxyphenyl)-1H-1,2,4-triazole, H2cat is catechol and H2pdbh is pentan-2,4-dione benzoylhydrazone--was evaluated in terms of free fatty acid (FFA) release. Among the six compounds examined, only [V(IV)(pdbh)2], [V(IV)(cat)3](2-) and [V(IV)(hyph(Ph))2], which at the physiological pH convert to the corresponding V(IV)O complexes, were found to exhibit a significant insulin-mimetic activity compared to VOSO4. In contrast, [V(taci)2](4+), [V(inoH-3)2](2-) and [V(dhab)2], which at pH 7.4 keep their 'bare' non-oxido structure, did not cause any inhibition of FFA. The results, therefore, suggest that a V(IV)O functionality is necessary for vanadium complexes to exhibit anti-diabetic effects. This agrees with the notion that the biotransformations of V compounds in the organism are more important than the nature of the species.
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Affiliation(s)
- Yutaka Yoshikawa
- Department of Health, Sports, and Nutrition, Faculty of Health Welfare, Kobe Woman's University, Kobe, Japan
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21
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Dash SP, Pasayat S, Bhakat S, Roy S, Dinda R, Tiekink ERT, Mukhopadhyay S, Bhutia SK, Hardikar MR, Joshi BN, Patil YP, Nethaji M. Highly Stable Hexacoordinated Nonoxidovanadium(IV) Complexes of Sterically Constrained Ligands: Syntheses, Structure, and Study of Antiproliferative and Insulin Mimetic Activity. Inorg Chem 2013; 52:14096-107. [DOI: 10.1021/ic401866x] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Subhashree P. Dash
- Department
of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Sagarika Pasayat
- Department
of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Saswati Bhakat
- Department
of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Satabdi Roy
- Department
of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Rupam Dinda
- Department
of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
| | | | - Subhadip Mukhopadhyay
- Department
of Life Science, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Sujit K. Bhutia
- Department
of Life Science, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Manasi R. Hardikar
- Biometry
and Nutrition Group, Agharkar Research Institute, G.G. Agrakar Road, Pune 411004
| | - Bimba N. Joshi
- Biometry
and Nutrition Group, Agharkar Research Institute, G.G. Agrakar Road, Pune 411004
| | - Yogesh P. Patil
- Department
of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - M. Nethaji
- Department
of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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22
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da Silva JA, Fraústo da Silva JJ, Pombeiro AJ. Amavadin, a vanadium natural complex: Its role and applications. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2013.03.010] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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23
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Sanna D, Várnagy K, Lihi N, Micera G, Garribba E. Formation of New Non-oxido Vanadium(IV) Species in Aqueous Solution and in the Solid State by Tridentate (O, N, O) Ligands and Rationalization of Their EPR Behavior. Inorg Chem 2013; 52:8202-13. [DOI: 10.1021/ic401080q] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Daniele Sanna
- Istituto CNR di Chimica Biomolecolare,
Trav. La Crucca 3, I-07040 Sassari, Italy
| | - Katalin Várnagy
- Department of Inorganic and Analytical Chemistry,
University of Debrecen, H-4010 Debrecen, Hungary
| | - Norbert Lihi
- Department of Inorganic and Analytical Chemistry,
University of Debrecen, H-4010 Debrecen, Hungary
| | - Giovanni Micera
- Dipartimento di Chimica e Farmacia and Centro
Interdisciplinare per lo Sviluppo della Ricerca Biotecnologica e per
lo Studio della Biodiversità della Sardegna, Università
di Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - Eugenio Garribba
- Dipartimento di Chimica e Farmacia and Centro
Interdisciplinare per lo Sviluppo della Ricerca Biotecnologica e per
lo Studio della Biodiversità della Sardegna, Università
di Sassari, Via Vienna 2, I-07100 Sassari, Italy
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24
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Pisano L, Várnagy K, Timári S, Hegetschweiler K, Micera G, Garribba E. VIVO Versus VIV Complex Formation by Tridentate (O, Narom, O) Ligands: Prediction of Geometry, EPR 51V Hyperfine Coupling Constants, and UV–Vis Spectra. Inorg Chem 2013; 52:5260-72. [DOI: 10.1021/ic400186x] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Luisa Pisano
- Dipartimento di Chimica
e Farmacia, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - Katalin Várnagy
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4010 Debrecen, Hungary
| | - Sarolta Timári
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4010 Debrecen, Hungary
| | - Kaspar Hegetschweiler
- Fachrichtung Chemie, Universität des Saarlandes, Postfach 151150,
D-66041 Saarbrücken, Germany
| | - Giovanni Micera
- Dipartimento di Chimica
e Farmacia, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
- Centro Interdisciplinare per lo Sviluppo della Ricerca Biotecnologica e per lo Studio della Biodiversità della Sardegna, I-07100 Sassari, Italy
| | - Eugenio Garribba
- Dipartimento di Chimica
e Farmacia, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
- Centro Interdisciplinare per lo Sviluppo della Ricerca Biotecnologica e per lo Studio della Biodiversità della Sardegna, I-07100 Sassari, Italy
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25
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Totaro P, Westrup KCM, Boulon ME, Nunes GG, Back DF, Barison A, Ciattini S, Mannini M, Sorace L, Soares JF, Cornia A, Sessoli R. A new approach to the synthesis of heteronuclear propeller-like single molecule magnets. Dalton Trans 2013; 42:4416-26. [PMID: 23280320 DOI: 10.1039/c2dt32618c] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Pasquale Totaro
- Dipartimento di Chimica Ugo Schiff and INSTM RU, Università degli Studi di Firenze, Via della Lastruccia 3-13, 50019 Sesto Fiorentino-FI, Italy
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26
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Xiao LN, Xu JN, Hu YY, Wang LM, Wang Y, Ding H, Cui XB, Xu JQ. Synthesis and characterizations of the first [V16O39Cl]6− (V16O39) polyanion. Dalton Trans 2013; 42:5247-51. [DOI: 10.1039/c3dt33081h] [Citation(s) in RCA: 11] [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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27
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Lodyga-Chruscinska E, Szebesczyk A, Sanna D, Hegetschweiler K, Micera G, Garribba E. Formation in aqueous solution of a non-oxido VIV complex with VN6 coordination. Potentiometric, ESI-MS, spectroscopic and computational characterization. Dalton Trans 2013; 42:13404-16. [DOI: 10.1039/c3dt50969a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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28
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NAGARAJU KOPPANATHI, SARKAR ANINDITA, PAL SAMUDRANIL. Non-oxo vanadium(IV) complexes with acetylacetone 4-R-benzoylhydrazones. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.747089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
| | - ANINDITA SARKAR
- a School of Chemistry, University of Hyderabad , Hyderabad , India
| | - SAMUDRANIL PAL
- a School of Chemistry, University of Hyderabad , Hyderabad , India
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29
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Sanna D, Ugone V, Micera G, Garribba E. Temperature and solvent structure dependence of VO2+ complexes of pyridine-N-oxide derivatives and their interaction with human serum transferrin. Dalton Trans 2012; 41:7304-18. [PMID: 22576640 DOI: 10.1039/c2dt12503j] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The behaviour of the systems formed by VO(2+), 2-hydroxypyridine-N-oxide (Hhpo) and 2-mercaptopyridine-N-oxide (Hmpo) was studied both in solution and in the solid state through the combined application of spectroscopic (EPR and UV-Vis spectroscopy) and DFT methods. The geometry of solid bis-chelated complexes [VOL(2)], with L = hpo and mpo, is square pyramidal, but it can change to cis-[VOL(2)S], where S is a solvent molecule, when these are dissolved in a coordinating solvent. The equilibrium between the square pyramidal and cis-octahedral forms is strongly affected by solvent and temperature. At room temperature, the predominant species is [VOL(2)], which gives a pink colour to the solutions; at lower temperatures, the equilibrium is shifted--partially or completely--toward the formation of cis-[VOL(2)S], which is green. In an acidic environment and in the presence of an excess of ligand, [VOL(2)] can transform into the tris-chelated complex [VL(3)](+), in which vanadium loses the oxido ligand and adopts a hexa-coordinated geometry intermediate between octahedral and trigonal prismatic. 1-Methylimidazole (1-MeIm), which represents a model for His-N coordination, forms mixed complexes with stoichiometry cis-[VOL(2)(1-MeIm)], occupying an equatorial position. In the ternary systems VO(2+)-Hhpo-hTf and VO(2+)-Hmpo-hTf at room temperature and pH 7.4, besides (VO)hTf and (VO)(2)hTf, the mixed species cis-VO(hpo)(2)(hTf) and VO(mpo)(hTf) are observed, with the equatorial binding of an accessible histidine residue. Finally, the contribution of the N-oxide group to (51)V A(z) and A(iso) hyperfine coupling constants, which can be important in the characterisation of similar species, is discussed.
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Affiliation(s)
- Daniele Sanna
- Istituto CNR di Chimica Biomolecolare, Trav. La Crucca 3, I-07040 Sassari, Italy
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Liang S, Liu Z, Liu C, Di X, Zhang J, Zhang D. Synthesis, Crystal Structure, and Magnetic Properties of a New Coordination Polymer Framework [CoII(4,4′-bpy)(N3)2]n. Z Anorg Allg Chem 2009. [DOI: 10.1002/zaac.200801241] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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31
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Jalbout AF, Li XH, Hassan MR, Golzar Hossain GM. Construction of novel coordination polymers with simple ligands. TRANSIT METAL CHEM 2008. [DOI: 10.1007/s11243-008-9086-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Meienberger MD, Morgenstern B, Stucky S, Hegetschweiler K. Polymerization of Mo
V
: Synthesis and Characterization of a Dinuclear Mo
V
and a Hexanuclear Mixed‐Valence Mo
V
/Mo
VI
Complex. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200700741] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Bernd Morgenstern
- Anorganische Chemie, Universität des Saarlandes, Postfach 15 11 50, 66041 Saarbrücken, Germany, Fax: +49‐681‐302‐2663
| | - Stefan Stucky
- Anorganische Chemie, Universität des Saarlandes, Postfach 15 11 50, 66041 Saarbrücken, Germany, Fax: +49‐681‐302‐2663
| | - Kaspar Hegetschweiler
- Anorganische Chemie, Universität des Saarlandes, Postfach 15 11 50, 66041 Saarbrücken, Germany, Fax: +49‐681‐302‐2663
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Dipyridyl bridged coordination polymers of Cu(II): Synthesis, crystal structure and magnetic study. Polyhedron 2007. [DOI: 10.1016/j.poly.2007.06.031] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Fielden J, Long DL, Slawin AMZ, Kögerler P, Cronin L. Ligand and Counterion Control of Ag(I) Architectures: Assembly of a {Ag8} Ring Cluster Mediated by Hydrophobic and Ag···Ag Interactions. Inorg Chem 2007; 46:9090-7. [PMID: 17892283 DOI: 10.1021/ic700872b] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A strategy combining ligand design and counterion variation has been used to investigate the assembly of silver(I) complexes. As a result, dinuclear, octanuclear, and polymeric silver(I) species have been synthesized by complexation of the rigid aliphatic amino ligands cis-3,5-diamino-trans-hydroxycyclohexane (DAHC), cis-3,5-diamino-trans-methoxycyclohexane (DAMC), and cis-3,5-diamino-trans-tert-butyldimethylsilylanyloxycyclohexane (DATC) with silver(I) triflate, nitrate, and perchlorate. The compositions of these aggregates, established by X-ray crystallography and elemental analysis, are [{Ag(DAHC)}2](CF3SO3)2 (1), [{Ag(DAMC)}2](CF3SO3)2 (2), [{Ag(DAMC)}2](NO3)2 (3), [{Ag(DATC)}6{Ag(DAHC)}2](NO3)8 (4), and [{Ag(DATC}n](NO3)n (5), where the DAHC present in 4 is formed by in situ hydrolysis of the acid labile silyl ether group. The type of aggregate formed depends both upon the noncoordinating O-substituent of the ligand and the (also noncoordinating) counterion, with the normal preference of the ligand topology for forming Ag2L2 structures being broken by introduction of the bulky, lipophilic O-tert-butyldimethylsilyl (TBDMS) group. Of particular note is the octanuclear silver ring structure 4, which is isolated only when both the O-TBDMS group and the nitrate counteranion are present and is formed from four Ag2L2 dimers connected by Ag...Ag and hydrogen-bonding interactions. Diffusion rate measurement of this {Ag8} complex by 1H NMR (DOSY) indicates dissociation in CD3OD and CD3CN, showing that this supramolecular ring structure is formed upon crystallization, and establishing a qualitative limit to the strength of Ag...Ag interactions in solution. When solutions of the {Ag8} cluster in methanol are kept for several days though, a new UV-vis absorption is observed at around 430 nm, consistent with the formation of silver nanoparticles.
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Affiliation(s)
- John Fielden
- WestCHEM, Department of Chemistry, University of Glasgow, University Avenue, Glasgow, United Kingdom
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Supramolecular networks of dinuclear copper(II): Synthesis, crystal structure and magnetic study. Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2006.12.041] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Morgenstern B, Kutzky B, Neis C, Stucky S, Hegetschweiler K, Garribba E, Micera G. Synthesis and Characterization of Vanadium(IV) Complexes with cis-Inositol in Aqueous Solution and in the Solid-State. Inorg Chem 2007; 46:3903-15. [PMID: 17419616 DOI: 10.1021/ic0618504] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The complex formation of vanadium(IV) with cis-inositol (ino) and the corresponding trimethyl ether 1,3,5-trideoxy-1,3,5-trimethoxy-cis-inositol (tmci) was studied in aqueous solution and in the solid-state. With increasing pH, the formation of [VO(H-2L)], [(VO)2L2H-5]-, [VO(H-3L)]- (L = ino) or [(VO)2L2H-6]2- (L = tmci), [V(H-3L)2]2-, and [VO(H-3L)(OH)2]3- was observed. For the vanadium(IV)/ino system, [(VO)2L2H-7]3- was observed as an additional dinuclear species. The formation constants of these complexes were determined by potentiometric titrations (25 degrees C, 0.1 M KCl). In addition, the vanadium(IV)/ino system was investigated by means of UV-vis spectrophotometric methods. EPR spectroscopy and cyclic voltammetry confirmed this complexation scheme. EPR measurements indicated the formation of three distinct isomers of the non-oxo complex [V(H-3ino)2]2- in weakly basic solution. This type of isomerism, which is not observed for the vanadium(IV)/tmci system, was assigned to the ability of ino to bind the vanadium(IV) center with three alkoxo groups having either a 1,3,5-triaxial or an 1,2,3-axial-equatorial-axial arrangement. The structures of [V(H-3ino)2][K2(ino)2].4H2O (1) and [Na6V(H-3ino)2](SO4)2.6H2O (2) were determined by single-crystal X-ray analysis. In both compounds, the coordination of each ino molecule to the vanadium(IV) center via three axial deprotonated oxygen donors was confirmed. The centrosymmetric structure of the coordination spheres corresponds to an almost regular octahedral geometry with a twist angle of 60 degrees. The crystal structure of the potassium complex 1 represents an unusual 1:1 packing of [V(H-3ino)2]2- dianions and [K2(ino)2]2+ dications, in which both K+ ions have a coordination number of nine and are bonded simultaneously to a 1,3,5-triaxial and an 1,2,3-axial-equatorial-axial site of ino. In 2, the [V(H-3ino)2]2- complexes are surrounded by six Na+ counterions that are bonded to the axial alkoxo oxygens and to the equatorial hydroxy oxygens of the cis-inositolato moieties. The six Na+ centers are further interlinked by bridging sulfate ions. According to EPR spectroscopy, the D3d symmetric structure of the [V(H-3ino)2]2- anion is retained in H2O, in dimethylformamide, and in a mixture of CHCl3/toluene 60:40 v/v.
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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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Rangel M, Leite A, João Amorim M, Garribba E, Micera G, Lodyga-Chruscinska E. Spectroscopic and Potentiometric Characterization of Oxovanadium(IV) Complexes Formed by 3-Hydroxy-4-Pyridinones. Rationalization of the Influence of Basicity and Electronic Structure of the Ligand on the Properties of VIVO Species in Aqueous Solution. Inorg Chem 2006; 45:8086-97. [PMID: 16999406 DOI: 10.1021/ic0605571] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Aqueous solution studies regarding the identification and characterization of complexes formed by the VIVO ion and 11 3-hydroxy-4-pyridinone derivatives have been performed using EPR and UV/vis spectroscopic techniques. For the three ligands (HL) adequately soluble in water (1-methyl-3-hydroxy-4-pyridinone, 1-methyl-2-ethyl-3-hydroxy-4-pyridinone, and 1,2-diethyl-3-hydroxy-4-pyridinone), potentiometric titrations were performed; the results are consistent with the formation of [V(IV)OL]+, [V(IV)OL2], [V(IV)OL2H(-1)]-, [(V(IV)O)2L2H(-2)], and [V(IV)L3]+ species. Bis chelated complexes are characterized by a cis-trans isomerism, the trans isomer being strongly favored with respect to the cis arrangement. Tris chelated non-oxo V(IV) species were prepared in CH3COOH; their spectroscopic features point to a d(z2) ground state and a geometry intermediate between an octahedron and a trigonal prism, related to the steric requirements of the substituent on the carbon atom in position 2 of the pyridinone ring. Four new solid derivatives, [V(IV)O(1,2-diethyl-3-hydroxy-4-pyridinonato)2], [V(IV)O(1-(p-tolyl)-2-ethyl-3-hydroxy-4-pyridinonato)2], [V(IV)O(1-(p-(n-butyl)phenyl)-2-ethyl-3-hydroxy-4-pyridinonato)2], and [V(IV)O(1-(p-(n-hexyl)phenyl)-2-ethyl-3-hydroxy-4-pyridinonato)2], were isolated and characterized; they exhibited a five-coordinate geometry close to square-pyramid. A criterion for establishing the degree of distortion toward the trigonal-bipyramid on the basis of the electronic absorption spectra is provided. Relationships between the pKa of the -OH group in position 3 of the ring and (i) log K of mono and bis chelated complexes, (ii) pK of the water molecule in cis-[V(IV)OL2(H2O)], (iii) log K of tris chelated species [V(IV)L3]+, and (iv) 51V hyperfine coupling constant (Az) have been established and discussed for a number of pyrone, pyridinone, and catechol ligands. The results are rationalized by assuming for pyridinones an electronic structure intermediate between that of pyrones and catechols. The relationships are valuable to the understanding of the behavior of VIVO species in aqueous solution.
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Affiliation(s)
- Maria Rangel
- REQUIMTE, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Largo Abel Salazar 2, 4099-003 Porto, Portugal
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Fielden J, Sprott J, Long DL, Kögerler P, Cronin L. Controlling Aggregation of Copper(II)-Based Coordination Compounds: From Mononuclear to Dinuclear, Tetranuclear, and Polymeric Copper Complexes. Inorg Chem 2006; 45:2886-95. [PMID: 16562944 DOI: 10.1021/ic051647t] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The use of a strategy combining ligand design and changes of reaction conditions has been investigated with the goal of directing the assembly of mononuclear, dinuclear, tetranuclear, and polymeric copper(II) complexes. As a result, closely related copper monomers, alkoxo dimers, and hydroxo cubanes, along with a carbonate-bridged polymeric species, have been synthesized using the rigid, aliphatic amino ligands cis-3,5-diamino-trans-hydroxycyclohexane (DAHC), cis-3,5-diamino-trans-methoxycyclohexane (DAMC), and the glutaryl-linked derivative glutaric acid bis-(cis-3,5-diaminocyclohexyl) ester (GADACE). The composition of the monomeric complex has been determined by X-ray crystallography as [Cu(DAHC)2](ClO4)2 (1), the two dimers as [{Cu(DAHC)(OMe)}2](ClO4)2.MeOH (2) and [{Cu(DAMC)(OMe)(ClO4)}2] (3), the three Cu4O4 cubanes as [{Cu(DAHC)(OH)}4](ClO4)(4).2.5MeOH (4), [{Cu(DAMC)(OH)}4](ClO4)4.H2O (5), and [{Cu2(OH)2(GADACE)}2]Cl4.2MeOH.6H2O (6), and an infinite-chain structure as [{Cu(DAHC)(CO3)}n] (7). Furthermore, the cubane structures 4 and 5 have been investigated magnetically. Our studies indicate that formation of the monomeric, dimeric, and tetranuclear DAHC and DAMC complexes can be controlled by small changes in reaction conditions and that further preorganization of the ligand moiety by linking the DAHC cores (GADACE) allows more effective direction of the self-assembly of the Cu4O4 cubane core.
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Affiliation(s)
- John Fielden
- Department of Chemistry, Joseph Black Building, University of Glasgow, University Avenue, Glasgow, G12 8QQ, United Kingdom
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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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