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Daul WG, Hirrle M, Eisfeld B, Kraft M, von Nidda HAK, Volkmer D. Heteropentanuclear {Ru(II)Cu(II) 4} Kuratowski Complexes Assembled from a Ruthenium(II) Precursor Complex to Study Competing Exchange Interactions in M(II)(ta) 2 Networks [ta(-) = 1,2,3-Triazolate]. Inorg Chem 2024; 63:5027-5039. [PMID: 38440999 DOI: 10.1021/acs.inorgchem.3c04478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2024]
Abstract
We report a directed two-step synthesis toward pentanuclear Kuratowski complexes. First, six 5,6-dimethylbenzo[1,2,3]triazole ligands (Me2btaH) are coordinated to a single Ru(II) ion, providing a topologically ideal template for the addition of further metal ions. The synthesis and crystal structures of [RuCu4X4(Me2bta)6] [X = acetylacetonate (acac) and tris(3,5-dimethyl-1-pyrazolyl)borate (Tp*)] are described. Both represent new members of the family of so-called Kuratowski (K3,3) complexes. The coordination units feature triazolato-bridged metal-centered {MM4} tetrahedra, which are known for frustrated magnetic interactions in both complexes and metal-organic frameworks. The novel Ru(II)-centered complexes were synthesized in order to investigate the influence of the presence or absence of a paramagnetic central metal ion in the Kuratowski complex. Superconducting quantum interference device and electron spin resonance measurements demonstrate that small deviations in bond lengths and valence angles can lead to the formation of pairs of magnetic exchange-coupled Cu(II) ions. Which Cu(II) ions pair up can be predicted in Jahn-Teller active compounds by the overlap of the respective orbitals. These data are compared with those gleaned for M(II)(ta)2 (ta = 1,2,3-triazolate) lattices, in which structurally similar {MM4} tetrahedra constitute the secondary building units.
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Affiliation(s)
- Wiebke G Daul
- University of Augsburg, Universitaetsstrasse 1, D-86159 Augsburg, Germany
| | - Marcel Hirrle
- University of Augsburg, Universitaetsstrasse 1, D-86159 Augsburg, Germany
| | - Bennett Eisfeld
- University of Augsburg, Universitaetsstrasse 1, D-86159 Augsburg, Germany
| | - Maryana Kraft
- University of Augsburg, Universitaetsstrasse 1, D-86159 Augsburg, Germany
| | | | - Dirk Volkmer
- University of Augsburg, Universitaetsstrasse 1, D-86159 Augsburg, Germany
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2
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Röß-Ohlenroth R, Kraft M, Bunzen H, Volkmer D. Inhibition, Binding of Organometallics, and Thermally Induced CO Release in an MFU-4-Type Metal-Organic Framework Scaffold with Open Bidentate Bibenzimidazole Coordination Sites. Inorg Chem 2022; 61:16380-16389. [PMID: 36197843 DOI: 10.1021/acs.inorgchem.2c02394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Triazolate-based MFU-4-type metal-organic frameworks are promising candidates for various applications, of which heterogeneous catalysis has emerged as a hot topic owing to the facile post-synthetic metal and ligand exchange in Kuratowski secondary building units (SBUs). Herein, we present the largest non-interpenetrated isoreticular MFU-4-type framework CFA-19 ([Co5IICl4(H2-bibt)3]; H4-bibt = 1,1',5,5'-tetrahydro-6,6'-biimidazo[4,5-f]benzotriazole; CFA-19 = Coordination Framework Augsburg University-19) and the CFA-19-Tp derivative featuring trispyrazolylborate inhibited SBUs as a scaffold with open bibenzimidazole coordination sites at the backbone of the H4-bibt linker. The proof-of-principle incorporation of accessible MIBr(CO)3 (M = Re, Mn) sites in CFA-19-Tp was revealed by single-crystal X-ray diffraction, and a thermally induced CO release was observed for MnBr(CO)3. Deprotonation of bibenzimidazole was also achieved by the reaction with ZnEt2.
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Affiliation(s)
- Richard Röß-Ohlenroth
- Chair of Solid State and Materials Chemistry, Institute of Physics, University of Augsburg, Universitätsstr. 1, D-86159 Augsburg, Germany
| | - Maryana Kraft
- Chair of Solid State and Materials Chemistry, Institute of Physics, University of Augsburg, Universitätsstr. 1, D-86159 Augsburg, Germany
| | - Hana Bunzen
- Chair of Solid State and Materials Chemistry, Institute of Physics, University of Augsburg, Universitätsstr. 1, D-86159 Augsburg, Germany
| | - Dirk Volkmer
- Chair of Solid State and Materials Chemistry, Institute of Physics, University of Augsburg, Universitätsstr. 1, D-86159 Augsburg, Germany
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3
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Fedulin A, Gupta SK, Rüter I, Meyer F, Jacobi von Wangelin A. Polynuclear Iron(II) Pyridonates: Synthesis and Reactivity of Fe 4 and Fe 5 Clusters. Inorg Chem 2022; 61:6149-6159. [PMID: 35404595 DOI: 10.1021/acs.inorgchem.2c00294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The combination of pyridonate ligands with transition metal ions enables the synthesis of an especially rich set of diverse coordination compounds involving various κ- and μ-bonding modes and higher nuclearities. With iron(II) ions, this chemical space is rather poorly explored beyond some biomimetic models of the pyridone iron-containing hydrogenase. Here, the topologically new Fe5 and Fe4 clusters, Fe5(LH)6[N(SiMe3)2]4 (1) and Fe4(LMe)6[N(SiMe3)2]2 (2), were synthesized (LH = 2-pyridonate; LMe = 6-methyl-2-pyridonate). Complex 1 contained an unprecedented diamondoid Fe@Fe4 tetrahedron with a central-to-peripheral Fe-Fe distance of ∼3.1 Å. The crystal structure of complex 2 displayed an Fe4O6 butterfly motif containing a planar Fe4 arrangement. Mössbauer spectroscopy confirmed the high-spin ferrous character of all iron ions. SQUID magnetometry reveals that the Fe(II) ions are involved in weak magnetic exchange coupling across the pyridonate bridges that results in antiferromagnetic interactions. The Fe4 cluster exhibits slow relaxation of magnetization under an applied magnetic field with an effective energy barrier of 38.5 K, rarely observed among the very rare examples of Fe(II) cluster-based single-molecule magnets. Studies of protolytic substitution of the amido ligands demonstrated the lability of the diamondoid Fe5 core in 1 and the stability of the Fe4 rhomboid in 2.
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Affiliation(s)
- Andrey Fedulin
- Department of Chemistry, University of Hamburg, Martin Luther King Pl 6, Hamburg 20146, Germany
| | - Sandeep K Gupta
- Institute of Inorganic Chemistry, University of Göttingen, Tammannstr. 4, Göttingen 37077, Germany
| | - Isabelle Rüter
- Institute of Inorganic Chemistry, University of Göttingen, Tammannstr. 4, Göttingen 37077, Germany
| | - Franc Meyer
- Institute of Inorganic Chemistry, University of Göttingen, Tammannstr. 4, Göttingen 37077, Germany
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4
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Tsantis ST, Danelli P, Tzimopoulos DI, Raptopoulou CP, Psycharis V, Perlepes SP. Pentanuclear Thorium(IV) Coordination Cluster from the Use of Di(2-pyridyl) Ketone. Inorg Chem 2021; 60:11888-11892. [PMID: 34351755 DOI: 10.1021/acs.inorgchem.1c01800] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The Th(NO3)4·5H2O/di(2-pyridyl) ketone [(py)2CO] reaction system gives a pentanuclear cluster containing the doubly deprotonated form of the gem-diol derivative of the ligand. The cluster consists of a tetrahedral arrangement of four ThIV ions centered on the fifth ion, which is the first characterized ThIV5 complex. The analysis of its structure reveals that this is a Kuratowski-type coordination compound.
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Affiliation(s)
- Sokratis T Tsantis
- Department of Chemistry, University of Patras, 26504 Patras, Greece.,Foundation for Research and Technology-Hellas (FORTH), Institute of Chemical Engineering Sciences (ICE-HT), P.O Box 144, 26504 Platani, Greece
| | | | | | - Catherine P Raptopoulou
- Institute of Nanoscience and Nanotechnology NCSR "Demokritos", 15310 Aghia Paraskevi, Attikis, Greece
| | - Vassilis Psycharis
- Institute of Nanoscience and Nanotechnology NCSR "Demokritos", 15310 Aghia Paraskevi, Attikis, Greece
| | - Spyros P Perlepes
- Department of Chemistry, University of Patras, 26504 Patras, Greece.,Foundation for Research and Technology-Hellas (FORTH), Institute of Chemical Engineering Sciences (ICE-HT), P.O Box 144, 26504 Platani, Greece
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5
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Ortega DE, Matute RA. Influence of linkers on the Kuratowski-type secondary building unit in nickel single-site MOFs for ethylene oligomerization catalysis: a computational study. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02137g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ni-Kuratowski-type MOFs were studied computationally for ethylene oligomerization and the catalytic performance of sterically different linkers was elucidated.
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Affiliation(s)
- Daniela E. Ortega
- Centro Integrativo de Biología y Química Aplicada (CIBQA)
- Universidad Bernardo O'Higgins
- Santiago 8370854
- Chile
| | - Ricardo A. Matute
- Centro Integrativo de Biología y Química Aplicada (CIBQA)
- Universidad Bernardo O'Higgins
- Santiago 8370854
- Chile
- Division of Chemistry and Chemical Engineering
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6
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Loukopoulos E, Kostakis GE. Recent advances in the coordination chemistry of benzotriazole-based ligands. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.06.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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7
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Röß-Ohlenroth R, Bredenkötter B, Volkmer D. Organometallic MFU-4l(arge) Metal–Organic Frameworks. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00297] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Richard Röß-Ohlenroth
- Chair of Solid State and Materials Chemistry, Institute of Physics, University of Augsburg, Universitätsstraße 1, 86159 Augsburg, Germany
| | - Björn Bredenkötter
- Chair of Solid State and Materials Chemistry, Institute of Physics, University of Augsburg, Universitätsstraße 1, 86159 Augsburg, Germany
| | - Dirk Volkmer
- Chair of Solid State and Materials Chemistry, Institute of Physics, University of Augsburg, Universitätsstraße 1, 86159 Augsburg, Germany
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8
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Pre-synthesized secondary building units in the rational synthesis of porous coordination polymers. MENDELEEV COMMUNICATIONS 2017. [DOI: 10.1016/j.mencom.2017.07.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Bunzen H, Grzywa M, Kalytta-Mewes A, Volkmer D. One-pot synthesis of ultrastable pentanuclear alkylzinc complexes. Dalton Trans 2017; 46:2618-2625. [DOI: 10.1039/c6dt04778e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first ever reported organometallic compounds featuring a Kuratowski-type bond topology were found to be unexpectedly chemically and thermally stable.
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Affiliation(s)
- Hana Bunzen
- Chair of Solid State and Materials Chemistry
- Institute of Physics
- University of Augsburg
- D-86159 Augsburg
- Germany
| | - Maciej Grzywa
- Chair of Solid State and Materials Chemistry
- Institute of Physics
- University of Augsburg
- D-86159 Augsburg
- Germany
| | - Andreas Kalytta-Mewes
- Chair of Solid State and Materials Chemistry
- Institute of Physics
- University of Augsburg
- D-86159 Augsburg
- Germany
| | - Dirk Volkmer
- Chair of Solid State and Materials Chemistry
- Institute of Physics
- University of Augsburg
- D-86159 Augsburg
- Germany
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10
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Werner TW, Reschke S, Bunzen H, von Nidda HAK, Deisenhofer J, Loidl A, Volkmer D. [Co5Tp*4(Me2bta)6]: A Highly Symmetrical Pentanuclear Kuratowski Complex Featuring Tris(pyrazolyl)borate and Benzotriazolate Ligands. Inorg Chem 2016; 55:1053-60. [DOI: 10.1021/acs.inorgchem.5b01982] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tamas W. Werner
- Chair of Solid State and Materials Chemistry,
Institute of Physics, University of Augsburg, Universitaetsstrasse 1, D-86159 Augsburg, Germany
| | - Stephan Reschke
- Experimental Physics V, Center for Electronic Correlations
and Magnetism, Institute of Physics, University of Augsburg, Universitaetsstrasse
1, D-86159 Augsburg, Germany
| | - Hana Bunzen
- Chair of Solid State and Materials Chemistry,
Institute of Physics, University of Augsburg, Universitaetsstrasse 1, D-86159 Augsburg, Germany
| | - Hans-Albrecht Krug von Nidda
- Experimental Physics V, Center for Electronic Correlations
and Magnetism, Institute of Physics, University of Augsburg, Universitaetsstrasse
1, D-86159 Augsburg, Germany
| | - Joachim Deisenhofer
- Experimental Physics V, Center for Electronic Correlations
and Magnetism, Institute of Physics, University of Augsburg, Universitaetsstrasse
1, D-86159 Augsburg, Germany
| | - Alois Loidl
- Experimental Physics V, Center for Electronic Correlations
and Magnetism, Institute of Physics, University of Augsburg, Universitaetsstrasse
1, D-86159 Augsburg, Germany
| | - Dirk Volkmer
- Chair of Solid State and Materials Chemistry,
Institute of Physics, University of Augsburg, Universitaetsstrasse 1, D-86159 Augsburg, Germany
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11
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Denysenko D, Jelic J, Reuter K, Volkmer D. Postsynthetic Metal and Ligand Exchange in MFU-4l: A Screening Approach toward Functional Metal-Organic Frameworks Comprising Single-Site Active Centers. Chemistry 2015; 21:8188-99. [DOI: 10.1002/chem.201406564] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 03/11/2015] [Indexed: 02/06/2023]
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12
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Schmieder P, Grzywa M, Denysenko D, Hambach M, Volkmer D. CFA-7: an interpenetrated metal–organic framework of the MFU-4 family. Dalton Trans 2015; 44:13060-70. [DOI: 10.1039/c5dt01673h] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Structural characterization of a novel interpenetrated bistriazolate-based MOF followed by postsynthetic replacement of Zn2+ by M2+ ions (M = Co, Ni, Cu) represents a versatile approach towards redox-active MOFs.
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Affiliation(s)
- Phillip Schmieder
- Institute of Physics
- Chair of Solid State and Material Science
- Augsburg University
- 86159 Augsburg
- Germany
| | - Maciej Grzywa
- Institute of Physics
- Chair of Solid State and Material Science
- Augsburg University
- 86159 Augsburg
- Germany
| | - Dmytro Denysenko
- Institute of Physics
- Chair of Solid State and Material Science
- Augsburg University
- 86159 Augsburg
- Germany
| | - Manuel Hambach
- Institute of Physics
- Chair of Solid State and Material Science
- Augsburg University
- 86159 Augsburg
- Germany
| | - Dirk Volkmer
- Institute of Physics
- Chair of Solid State and Material Science
- Augsburg University
- 86159 Augsburg
- Germany
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Denysenko D, Grzywa M, Jelic J, Reuter K, Volkmer D. Scorpionate-Type Coordination in MFU-4lMetal-Organic Frameworks: Small-Molecule Binding and Activation upon the Thermally Activated Formation of Open Metal Sites. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201310004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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14
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Denysenko D, Grzywa M, Jelic J, Reuter K, Volkmer D. Scorpionate-Type Coordination in MFU-4lMetal-Organic Frameworks: Small-Molecule Binding and Activation upon the Thermally Activated Formation of Open Metal Sites. Angew Chem Int Ed Engl 2014; 53:5832-6. [DOI: 10.1002/anie.201310004] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Revised: 03/11/2014] [Indexed: 11/05/2022]
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15
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Anastasiadis NC, Bilis G, Plakatouras JC, Raptopoulou CP, Psycharis V, Beavers C, Teat SJ, Louloudi M, Perlepes SP. Iron(III) chloride–benzotriazole adducts with trigonal bipyramidal geometry: Spectroscopic, structural and catalytic studies. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.03.062] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Schmieder P, Denysenko D, Grzywa M, Baumgärtner B, Senkovska I, Kaskel S, Sastre G, van Wüllen L, Volkmer D. CFA-1: the first chiral metal–organic framework containing Kuratowski-type secondary building units. Dalton Trans 2013; 42:10786-97. [DOI: 10.1039/c3dt50787d] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Grzywa M, Denysenko D, Hanss J, Scheidt EW, Scherer W, Weil M, Volkmer D. CuN6 Jahn–Teller centers in coordination frameworks comprising fully condensed Kuratowski-type secondary building units: phase transitions and magneto-structural correlations. Dalton Trans 2012; 41:4239-48. [DOI: 10.1039/c2dt12311h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Denysenko D, Werner T, Grzywa M, Puls A, Hagen V, Eickerling G, Jelic J, Reuter K, Volkmer D. Reversible gas-phase redox processes catalyzed by Co-exchanged MFU-4l(arge). Chem Commun (Camb) 2011; 48:1236-8. [PMID: 22179398 DOI: 10.1039/c2cc16235k] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Postsynthetic metal ion exchange in a benzotriazolate-based MFU-4l(arge) framework leads to a Co(II)-containing framework with open metal sites showing reversible gas-phase oxidation properties.
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Affiliation(s)
- Dmytro Denysenko
- Institute of Physics, Chair of Solid State and Material Science, Augsburg University, D-86135 Augsburg, Germany
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Wang DD, Peng J, Pang HJ, Zhang PP, Wang X, Zhu M, Chen Y, Liu MG, Meng CL. Keggin polyoxometalate-templated chair-like heptanuclear silver complex. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.09.032] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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20
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Denysenko D, Grzywa M, Tonigold M, Streppel B, Krkljus I, Hirscher M, Mugnaioli E, Kolb U, Hanss J, Volkmer D. Elucidating Gating Effects for Hydrogen Sorption in MFU-4-Type Triazolate-Based Metal-Organic Frameworks Featuring Different Pore Sizes. Chemistry 2011; 17:1837-48. [DOI: 10.1002/chem.201001872] [Citation(s) in RCA: 192] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2010] [Indexed: 11/11/2022]
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21
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Liu YY, Grzywa M, Tonigold M, Sastre G, Schüttrigkeit T, Leeson NS, Volkmer D. Photophysical properties of Kuratowski-type coordination compounds [MIIZn4Cl4(Me2bta)6] (MII = Zn or Ru) featuring long-lived excited electronic states. Dalton Trans 2011; 40:5926-38. [DOI: 10.1039/c0dt01750g] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Biswas S, Tonigold M, Speldrich M, Kögerler P, Weil M, Volkmer D. Syntheses and magnetostructural investigations on Kuratowski-type homo- and heteropentanuclear coordination compounds [MZn4Cl4(L)6] (M(II) = Zn, Fe, Co, Ni, or Cu; L = 5,6-dimethyl-1,2,3-benzotriazolate) represented by the nonplanar K(3,3) graph. Inorg Chem 2010; 49:7424-34. [PMID: 20690751 DOI: 10.1021/ic100749k] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Homo- and heteropentanuclear coordination compounds [MZn(4)Cl(4)(L)(6)] (M(II) = Zn, Fe, Co, Ni, or Cu; L = 5,6-dimethyl-1,2,3-benzotriazolate) were prepared containing mu(3)-bridging N-donor ligands (1,2,3-benzotriazolate), which are structurally related to the fundamental secondary building unit of Metal-organic Framework Ulm University-4 (MFU-4). The unique topology of these T(d)-symmetrical compounds is characterized by the nonplanar K(3,3) graph, introduced into graph theory by the mathematician Casimir Kuratowski in 1930. The following "Kuratowski-type" compounds were investigated by single-crystal X-ray structure analysis: [MZn(4)Cl(4)(Me(2)bta)(6)].2DMF (M(II) = Zn, Fe, Co, and Cu; DMF = N,N'-dimethylformamide) and [MZn(4)Cl(4)(Me(2)bta)(6)].2C(6)H(5)Br (M(II) = Co and Ni; C(6)H(5)Br = bromobenzene). The mu(3)-bridging benzotriazolate ligands span the edges of an imaginary tetrahedron, in the center of which a redox-active octahedrally coordinated M(II) ion is placed. Four Zn(II) ions are located at the corners of the coordination units. Each Zn center is bound to a monodentate Cl(-) anion and three N-donor atoms stemming from different benzotriazolate ligands. The fact that open-shell redox-active M(II) ions can be introduced selectively into the central octahedral coordination sites is unambiguously proven by a combination of magnetic measurements, UV-vis spectroscopy, and energy-dispersive X-ray and inductively coupled plasma atomic emission spectrometry analysis. The phase purity of all compounds was checked by powder X-ray diffractometry, IR spectroscopy, and elemental analysis. The electronic spectra and magnetic properties of the compounds are in complete agreement with their structures determined from single-crystal data. Thermogravimetric analysis shows that all compounds possess a high thermal stability up to 673 K. The pentanuclear compounds retain their structural integrity in solution, as evidenced by time-of-flight mass spectrometry analysis and comparative solution and solid-state diffuse-reflectance spectroscopy. High stability paired with the presence of redox-active metal ions and Lewis-acidic Zn centers renders Kuratowski-type compounds structural and functional models for future MFU-4-type bi- and multifunctional heterogeneous catalysts.
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Affiliation(s)
- Shyam Biswas
- Institute of Inorganic Chemistry II, Materials and Catalysis, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany
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Corma A, García H, Llabrés i Xamena FX. Engineering Metal Organic Frameworks for Heterogeneous Catalysis. Chem Rev 2010; 110:4606-55. [PMID: 20359232 DOI: 10.1021/cr9003924] [Citation(s) in RCA: 2419] [Impact Index Per Article: 172.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- A. Corma
- Instituto de Tecnología Química (UPV-CSIC), Universidad Politécnica de Valencia, Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022 Valencia, Spain
| | - H. García
- Instituto de Tecnología Química (UPV-CSIC), Universidad Politécnica de Valencia, Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022 Valencia, Spain
| | - F. X. Llabrés i Xamena
- Instituto de Tecnología Química (UPV-CSIC), Universidad Politécnica de Valencia, Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022 Valencia, Spain
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[Cu4OCl6(DABCO)2]·0.5DABCO·4CH3OH (“MFU-5”): Modular synthesis of a zeolite-like metal-organic framework constructed from tetrahedral {Cu4OCl6} secondary building units and linear organic linkers. J SOLID STATE CHEM 2010. [DOI: 10.1016/j.jssc.2009.10.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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25
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Biswas S, Tonigold M, Kelm H, Krüger HJ, Volkmer D. Thermal spin-crossover in the [M3Zn6Cl6L12] (M = Zn, FeII; L = 5,6-dimethoxy-1,2,3-benzotriazolate) system: structural, electrochemical, Mössbauer, and UV-Vis spectroscopic studies. Dalton Trans 2010; 39:9851-9. [DOI: 10.1039/c0dt00556h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Biswas S, Grzywa M, Nayek HP, Dehnen S, Senkovska I, Kaskel S, Volkmer D. A cubic coordination framework constructed from benzobistriazolate ligands and zinc ions having selective gas sorption properties. Dalton Trans 2009:6487-95. [DOI: 10.1039/b904280f] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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