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Ohkubo T, Komiyama N, Masu H, Kishikawa K, Kohri M. Molecular Dynamics Studies of the Ho(III) Aqua-tris(dibenzoylmethane) Complex: Role of Water Dynamics. Inorg Chem 2023. [PMID: 37470095 DOI: 10.1021/acs.inorgchem.3c01277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/21/2023]
Abstract
The seven-coordinate Ho(III) aqua-tris(dibenzoylmethane)(DBM) complex, referred to as Ho-(DBM)3·H2O, was first reported in the late 1960s. It has a threefold symmetric structure, with Ho at the center of three dibenzoylmethane ligands and hydrogen-bonded water to ligands. It is considered that the hydrogen bonds between the water molecule and the ligands surrounding Ho play an important role in the formation of its symmetrical structure. In this work, we developed new force-field parameters for classical molecular dynamics (CMD) simulations to theoretically elucidate the structure and dynamics of Ho-(DBM)3·H2O. To develop the force field, structural optimization and molecular dynamics were performed on the basis of ab initio calculations using the plane-wave pseudopotential method. The force-field parameters for CMD were then optimized to reproduce the data obtained from ab initio calculations. Validation of the developed force field showed good agreement with the experimental crystalline structure and ab initio data. The vibrational properties of water in Ho-(DBM)3·H2O were investigated by comparison with bulk liquid water. The vibrational motion of water was found to have a characteristic mode originating from stationary rotational motion along the c-axis of Ho(III) aqua-tris(dibenzoylmethane). Contrary to expectations, the hydrogen-bond dynamics of water in Ho-(DBM)3·H2O were found to be almost equivalent to those of bulk liquid water except for librational motion. This development route for force-field parameters for CMD and the establishment of water dynamics can advance the understanding of water-coordinated metal complexes with high coordination numbers such as Ho-(DBM)3·H2O.
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Affiliation(s)
- Takahiro Ohkubo
- Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho Inage-ku, Chiba 263-8522, Japan
| | - Nao Komiyama
- Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho Inage-ku, Chiba 263-8522, Japan
| | - Hyuma Masu
- Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho Inage-ku, Chiba 263-8522, Japan
| | - Keiki Kishikawa
- Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho Inage-ku, Chiba 263-8522, Japan
| | - Michinari Kohri
- Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho Inage-ku, Chiba 263-8522, Japan
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Mahrholdt J, Rüffer T, Lang H. Synthesis and Electrochemical Studies of Ruthenium(II) Dicarbonyl Bis(ferrocenyl‐β‐diketonates). Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.202000257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Julia Mahrholdt
- Institut für Chemie, Anorganische Chemie Fakultät für Naturwissenschaften Technische Universität Chemnitz 09107 Chemnitz Germany
| | - Tobias Rüffer
- Institut für Chemie, Anorganische Chemie Fakultät für Naturwissenschaften Technische Universität Chemnitz 09107 Chemnitz Germany
| | - Heinrich Lang
- Institut für Chemie, Anorganische Chemie Fakultät für Naturwissenschaften Technische Universität Chemnitz 09107 Chemnitz Germany
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Lehrich SW, Mahrholdt J, Korb M, Hildebrandt A, Swarts JC, Lang H. Synthesis, Characterization, and Electrochemistry of Diferrocenyl β-Diketones, -Diketonates, and Pyrazoles. Molecules 2020; 25:molecules25194476. [PMID: 33003450 PMCID: PMC7583057 DOI: 10.3390/molecules25194476] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 09/21/2020] [Accepted: 09/22/2020] [Indexed: 11/24/2022] Open
Abstract
The synthesis of FcC(O)CH(R)C(O)Fc (Fc = Fe(η5-C5H4)(η5-C5H5); R = H, 5; nBu, 7; CH2CH2(OCH2CH2)2OMe, 9), [M(κ2O,O′-FcC(O)CHC(O)Fc)n] (M = Ti, n = 3, 10; M = Fe, n = 3, 11; M = BF2, n = 1, 12), and 1-R′-3,5-Fc2-cC3HN2 (R′ = H, 13; Me, 14; Ph, 15) is discussed. The solid-state structures of 5, 7, 9, 12, 13, 15, and 16 ([TiCl2(κ2O,O′-PhC(O)CHC(O)Ph)2]) show that 7 and 9 exist in their β-diketo form. Compound 13 crystallizes as a tetramer based on a hydrogen bond pattern, including one central water molecule. The electrochemical behavior of 5–7 and 9–16 was studied by cyclic and square-wave voltammetry, showing that the ferrocenyls can separately be oxidized reversibly between −50 and 750 mV (5–7, 9, 12–15: two Fc-related events; 10, 11: six events, being partially superimposed). For complex 10, Ti-centered reversible redox processes appear at −985 (TiII/TiIII) and −520 mV (TiIII/TiIV). Spectro-electrochemical UV-Vis/NIR measurements were carried out on 5, 6, and 12, whereby only 12 showed an IVCT (intervalence charge-transfer) band of considerable strength (νmax = 6250 cm−1, Δν½ = 4725 cm−1, εmax = 240 L·mol−1·cm−1), due to the rigid C3O2B cycle, enlarging the coupling strength between the Fc groups.
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Affiliation(s)
- Steve W. Lehrich
- Anorganische Chemie, Institut für Chemie, Fakultät für Naturwissenschaften, Technische Universität Chemnitz, D-09107 Chemnitz, Germany; (S.W.L.); (J.M.); (A.H.)
| | - Julia Mahrholdt
- Anorganische Chemie, Institut für Chemie, Fakultät für Naturwissenschaften, Technische Universität Chemnitz, D-09107 Chemnitz, Germany; (S.W.L.); (J.M.); (A.H.)
| | - Marcus Korb
- School of Molecular Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, Perth, WA 6009, Australia;
| | - Alexander Hildebrandt
- Anorganische Chemie, Institut für Chemie, Fakultät für Naturwissenschaften, Technische Universität Chemnitz, D-09107 Chemnitz, Germany; (S.W.L.); (J.M.); (A.H.)
| | - Jannie C. Swarts
- Department of Chemistry, University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa;
| | - Heinrich Lang
- Anorganische Chemie, Institut für Chemie, Fakultät für Naturwissenschaften, Technische Universität Chemnitz, D-09107 Chemnitz, Germany; (S.W.L.); (J.M.); (A.H.)
- Correspondence: ; Tel./Fax: +49-(0)371-531-21210
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Preuß A, Korb M, Rüffer T, Bankwitz J, Georgi C, Jakob A, Schulz SE, Lang H. Synthesis of β‐Ketoiminato Copper(II) Complexes and Their Use in Copper Deposition. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.201900208] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Andrea Preuß
- Inorganic Chemistry, Institute of Chemistry Faculty of Natural Sciences Technische Universität Chemnitz 09107 Chemnitz Germany
- Faculty of Natural Sciences MAIN Research Center Rosenbergstraße 6 09126 Chemnitz Germany
| | - Marcus Korb
- School of Molecular Sciences Faculty of Science The University of Western Australia 6009 Crawley Perth, WA Australia
| | - Tobias Rüffer
- Inorganic Chemistry, Institute of Chemistry Faculty of Natural Sciences Technische Universität Chemnitz 09107 Chemnitz Germany
| | - Jörn Bankwitz
- Faculty of Science Fraunhofer Institute for Electronic Nano Systems (ENAS) Technologie‐Campus 3 09126 Chemnitz Germany
| | - Colin Georgi
- Faculty of Science Fraunhofer Institute for Electronic Nano Systems (ENAS) Technologie‐Campus 3 09126 Chemnitz Germany
| | - Alexander Jakob
- Inorganic Chemistry, Institute of Chemistry Faculty of Natural Sciences Technische Universität Chemnitz 09107 Chemnitz Germany
| | - Stefan E. Schulz
- Faculty of Science Fraunhofer Institute for Electronic Nano Systems (ENAS) Technologie‐Campus 3 09126 Chemnitz Germany
- Center for Microtechnologies Faculty of Science Technische Universität Chemnitz 09107 Chemnitz Germany
| | - Heinrich Lang
- Inorganic Chemistry, Institute of Chemistry Faculty of Natural Sciences Technische Universität Chemnitz 09107 Chemnitz Germany
- Faculty of Natural Sciences MAIN Research Center Rosenbergstraße 6 09126 Chemnitz Germany
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Preuß A, Korb M, Rüffer T, Bankwitz J, Georgi C, Jakob A, Schulz SE, Lang H. A β-ketoiminato palladium(II) complex for palladium deposition. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2019. [DOI: 10.1515/znb-2019-0172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Abstract
The ¦-ketoiminato complex [Pd(OAc)L] (3) can be synthesized by the reaction of bis(benzoylacetone)diethylenetriamine (1, = LH) with [Pd(OAc)2] (2). The structure of 3 in the solid state has been determined by single X-ray diffraction analysis. Complex 3 crystallizes as a dimer (3
2), which is formed by hydrogen bonds between NH and OOAc functionalities of two adjacent ligands. Each of the Pd atoms is complexed by one ON2 donor unit of the polydentate ligand L
− and an acetate group. Pd–Pd interactions and hydrogen bond formation between a NH and the C=O acetate moiety lead to a [4 + 2] coordination at Pd. The non-coordinated part of L exists in its ¦-keto-enamine form. The thermal decomposition behavior of 3
2 was studied by TG (thermogravimetry) and TG-MS showing that 3
2 decomposes between 200 and 500°C independent of the applied atmosphere. Under oxygen PdO is produced, while under argon Pd is formed as confirmed by PXRD measurements. Complex 3
2 was applied as a spin-coating precursor (conc. 0.1 mol L−1, volume 1.5 mL, 3000 rpm, deposition time 6 min, heating rate 50 K min−1, holding time 60 min (Ar) and 120 min (air) at T = 800°C). The as-obtained samples are characterized by granulated particles of Pd/PdO on the substrate surface. EDX (energy-dispersive X-ray spectroscopy) and XPS (X-ray photoelectron spectroscopy) measurements confirmed the formation of Pd (Ar) or PdO (O2) with up to 12 mol% C impurity.
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Affiliation(s)
- Andrea Preuß
- Technische Universität Chemnitz , Faculty of Natural Sciences, Institute of Chemistry, Inorganic Chemistry , D-09107 Chemnitz , Germany
- MAIN Research Center , Rosenbergstraße 6 , 09126 Chemnitz , Germany
| | - Marcus Korb
- University of Western Australia , School of Molecular Sciences , Perth , WA 6009 , Australia
| | - Tobias Rüffer
- Technische Universität Chemnitz , Faculty of Natural Sciences, Institute of Chemistry, Inorganic Chemistry , D-09107 Chemnitz , Germany
| | - Jörn Bankwitz
- Fraunhofer Institute for Electronic Nano Systems (ENAS) , Technologie-Campus 3 , D-09126 Chemnitz , Germany
| | - Colin Georgi
- Fraunhofer Institute for Electronic Nano Systems (ENAS) , Technologie-Campus 3 , D-09126 Chemnitz , Germany
| | - Alexander Jakob
- Technische Universität Chemnitz , Faculty of Natural Sciences, Institute of Chemistry, Inorganic Chemistry , D-09107 Chemnitz , Germany
| | - Stefan E. Schulz
- Fraunhofer Institute for Electronic Nano Systems (ENAS) , Technologie-Campus 3 , D-09126 Chemnitz , Germany
- Technische Universität Chemnitz , Center for Microtechnologies , D-09107 Chemnitz , Germany
| | - Heinrich Lang
- Technische Universität Chemnitz , Faculty of Natural Sciences, Institute of Chemistry, Inorganic Chemistry , D-09107 Chemnitz , Germany
- MAIN Research Center , Rosenbergstraße 6 , 09126 Chemnitz , Germany , Phone: +49 (0)371 531 21210, Fax: +49 (0)371 531 21219
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Frenzel P, Preuß A, Bankwitz J, Georgi C, Ganss F, Mertens L, Schulz SE, Hellwig O, Mehring M, Lang H. Synthesis of Mg and Zn diolates and their use in metal oxide deposition. RSC Adv 2019; 9:10657-10669. [PMID: 35515315 PMCID: PMC9062479 DOI: 10.1039/c9ra00585d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 03/20/2019] [Indexed: 11/21/2022] Open
Abstract
The synthesis of complexes [M(OCHMeCH2NMeCH2)2] (5, M = Mg; 7, M = Zn) is described. Treatment of MeHNCH2CH2NMeH (1) with 2-methyloxirane (2) gave diol (HOCHMeCH2NMeCH2)2 (3), which upon reaction with equimolar amounts of MR2 (4, M = Mg, R = Bu; 6, M = Zn, R = Et) gave 5 and 7. The thermal behavior and vapor pressure of 5 and 7 were investigated to show whether they are suited as CVD (= chemical vapor deposition) and/or spin-coating precursors for MgO or ZnO layer formation. Thermogravimetric (TG) studies revealed that 5 and 7 decompose between 80–530 °C forming MgO and ZnO as evidenced by PXRD studies. In addition, TG-MS-coupled experiments were carried out with 7 proving that decomposition occurs by M–O, C–O, C–N and C–C bond cleavages, as evidenced from the detection of fragments such as CH4N+, C2H4N+, C2H5N+, CH2O+, C2H2O+ and C2H3O+. The vapor pressure of 7 was measured at 10.4 mbar at 160 °C, while 5 is non-volatile. The layers obtained by CVD are dense and conformal with a somewhat granulated surface morphology as evidenced by SEM studies. In addition, spin–coating experiments using 5 and 7 as precursors were applied. The corresponding MO layer thicknesses are between 7–140 nm (CVD) or 80 nm and 65 nm (5, 7; spin-coating). EDX and XPS measurements confirm the formation of MgO and ZnO films, however, containing 12–24 mol% (CVD) or 5–9 mol% (spin-coating) carbon. GIXRD studies verify the crystalline character of the deposited layers obtained by CVD and the spin-coating processes. Mg and Zn containing precursors for the generation of metal oxide layers by CVD and/or spin-coating are described.![]()
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Affiliation(s)
- Peter Frenzel
- Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Chemistry, Inorganic Chemistry D-09107 Chemnitz Germany +49(0)371-531-21219 +49(0)371-531-21210
| | - Andrea Preuß
- Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Chemistry, Inorganic Chemistry D-09107 Chemnitz Germany +49(0)371-531-21219 +49(0)371-531-21210
| | - Jörn Bankwitz
- Fraunhofer Institute for Electronic Nano Systems (ENAS), Technologie-Campus 3 D-09126 Chemnitz Germany
| | - Colin Georgi
- Fraunhofer Institute for Electronic Nano Systems (ENAS), Technologie-Campus 3 D-09126 Chemnitz Germany
| | - Fabian Ganss
- Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Physics D-09107 Chemnitz Germany
| | - Lutz Mertens
- Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Chemistry, Coordination Chemistry D-09107 Chemnitz Germany
| | - Stefan E Schulz
- Fraunhofer Institute for Electronic Nano Systems (ENAS), Technologie-Campus 3 D-09126 Chemnitz Germany.,Technische Universität Chemnitz, Center for Microtechnologies D-09107 Chemnitz Germany
| | - Olav Hellwig
- Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Physics D-09107 Chemnitz Germany.,Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research D-01328 Dresden Germany
| | - Michael Mehring
- Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Chemistry, Coordination Chemistry D-09107 Chemnitz Germany
| | - Heinrich Lang
- Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Chemistry, Inorganic Chemistry D-09107 Chemnitz Germany +49(0)371-531-21219 +49(0)371-531-21210
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Synthesis and thermal behavior of [Li(thf) 3 (μ-Cl)La{N(SiMe 3 ) 2 } 3 ] and its investigation as spin-coating precursor for lanthanum-based layer formation. J RARE EARTH 2018. [DOI: 10.1016/j.jre.2017.12.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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