1
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Mondal S, Chauhan D, Guizouarn T, Pointillart F, Rajaraman G, Steiner A, Baskar V. Self-Assembled Lanthanide Phosphinate Square Grids (Ln = Er, Dy, and Tb): Dy 4 Shows SMM/SMT and Tb 4 SMT Behavior. Inorg Chem 2024. [PMID: 39264390 DOI: 10.1021/acs.inorgchem.4c02567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/13/2024]
Abstract
Tetranuclear [2 × 2] square-grid-like LnIII clusters have been synthesized by reacting LnCl3·6H2O salts with bis[α-hydroxy(p-bromophenyl)methyl]phosphinic acid [R2PO2H, where R = CH(OH)PhBr] and pivalic acid. Single-crystal X-ray diffraction studies show the formation of [Me4N]2[Ln4(μ2-η1:η1-PO2R2)8(η2-CO2But)4(μ4-CO3)] [Ln = Er (1), Dy (2), and Tb (3)]. Direct-current studies reveal significant ferromagnetic interactions between DyIII in 2 and TbIII in 3 and an antiferromagnetic interaction between ErIII in 1. Dynamic magnetic susceptibility measurements confirm a single-molecule magnet (SMM) behavior in both 0 and 1200 Oe applied magnetic fields for 2. Complexes 2 and 3 show single molecular toroic (SMT) behavior with a mixed magnetic moment.
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Affiliation(s)
- Suman Mondal
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - Deepanshu Chauhan
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Thierry Guizouarn
- Sciences Chimiques de Rennes, Universite de Rennes 1, UMR 6226, CNRS 263, Avenue du Général Leclerc, Rennes 35042, France
| | - Fabrice Pointillart
- Sciences Chimiques de Rennes, Universite de Rennes 1, UMR 6226, CNRS 263, Avenue du Général Leclerc, Rennes 35042, France
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Alexander Steiner
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD U.K
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2
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Zhang P, Liu H, Xu S, He Y, He X, Sun B, Hu J. Direct Construction of 1,4-Dihydropyridazines and Pyrazoles via Annulation of Alkyl 2-Aroyl-1-chlorocyclopropanecarboxylates. J Org Chem 2024; 89:9853-9860. [PMID: 38822472 DOI: 10.1021/acs.joc.4c00520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2024]
Abstract
An efficient and chemodivergent synthesis of highly functionalized 1,4-dihydropyridazines and pyrazoles has been accomplished via base-promoted annulation between hydrazones and alkyl 2-aroyl-1-chlorocyclopropanecarboxylates, respectively. This transition-metal-free domino reaction proceeded rapidly under mild basic conditions, affording potentially bioactive 1,4-dihydropyridazine and pyrazole derivatives in moderate yields. The conversion of 1,4-dihydropyridazine to pyrazole was confirmed by adjusting the quantity of the base.
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Affiliation(s)
- Pengwei Zhang
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Huili Liu
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Shuo Xu
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Yiqun He
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Xinhao He
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Bing Sun
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Junhao Hu
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
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3
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Velazquez-Garcia JDJ, Basuroy K, Storozhuk D, Wong J, Demeshko S, Meyer F, Henning R, Techert S. Structural dynamics of a thermally silent triiron(II) spin crossover defect grid complex. Dalton Trans 2023; 52:12224-12234. [PMID: 37656445 PMCID: PMC10498823 DOI: 10.1039/d3dt02067c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Accepted: 08/04/2023] [Indexed: 09/02/2023]
Abstract
The structural evolution of spin crossover (SCO) complexes during their spin transition at equilibrium and out-of-equilibrium conditions needs to be understood to enable their successful utilisation in displays, actuators and memory components. In this study, diffraction techniques were employed to study the structural changes accompanying the temperature increase and the light irradiation of a defect [2 × 2] triiron(II) metallogrid of the form [FeII3LH2(HLH)2](BF4)4·4MeCN (FE3), LH = 3,5-bis{6-(2,2'-bipyridyl)}pyrazole. Although a multi-temperature crystallographic investigation on single crystals evidenced that the compound does not exhibit a thermal spin transition, the structural analysis of the defect grid suggests that the flexibility of the grid, provided by a metal-devoid vertex, leads to interesting characteristics that can be used for intermolecular cooperativity in related thermally responsive systems. Time-resolved photocrystallography results reveal that upon excitation with a ps laser pulse, the defect grid shows the first two steps of the out-of-equilibrium process, namely the photoinduced and elastic steps, occurring at the ps and ns time scales, respectively. Similar to a previously reported [2 × 2] tetrairon(II) metallogrid, FE3 exhibits a local distortion of the entire grid during the photoinduced step and a long-range distortion of the lattice during the elastic step. Although the lifetime of the pure photoinduced high spin (HS) state is longer in the tetranuclear grid than in the defect grid, suggesting that the global nuclearity plays a crucial role for the lifetime of the photoinduced species, the influence of the co-crystalising solvent on the lifetime of the photoinduced HS state remains unknown. This study sheds light on the out-of-equilibrium dynamics of a thermally silent defect triiron SCO metallogrid.
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Affiliation(s)
| | - Krishnayan Basuroy
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.
| | - Darina Storozhuk
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.
| | - Joanne Wong
- Institut für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße, 4, 37077, Göttingen, Germany
| | - Serhiy Demeshko
- Institut für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße, 4, 37077, Göttingen, Germany
| | - Franc Meyer
- Institut für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße, 4, 37077, Göttingen, Germany
| | - Robert Henning
- Center for Advanced Radiation Sources, The University of Chicago, Argonne National Laboratory, 9700 South Cass Ave, Lemont, Illinois, 90439, USA
| | - Simone Techert
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.
- Institut für Röntgenphysik, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, Göttingen, 37077, Germany
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4
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Structure, Optical and Magnetic Properties of Two Isomeric 2-Bromomethylpyridine Cu(II) Complexes [Cu(C 6H 9NBr) 2(NO 3) 2] with Very Different Binding Motives. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020731. [PMID: 36677789 PMCID: PMC9866386 DOI: 10.3390/molecules28020731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 12/29/2022] [Accepted: 01/05/2023] [Indexed: 01/12/2023]
Abstract
Two isomeric 2-bromomethylpyridine Cu(II) complexes [Cu(C6H9NBr)2(NO3)2] with 2-bromo-5-methylpyridine (L1) and 2-bromo-4-methylpyridine (L2) were synthesized as air-stable blue materials in good yields. The crystal structures were different with [Cu(L1)2(NO3)2] (CuL1) crystallizing in the monoclinic space group P21/c, while the 4-methyl derivative CuL2 was solved and refined in triclinic P1¯. The orientation of the Br substituents in the molecular structure (anti (CuL1) vs. syn (CuL2) conformations) and the geometry around Cu(II) in an overall 4 + 2 distorted coordination was very different with two secondary (axially elongated) Cu-O bonds on each side of the CuN2O2 basal plane in CuL1 or both on one side in CuL2. The two Br substituents in CuL2 come quite close to the Cu(II) centers and to each other (Br⋯Br ~3.7 Å). Regardless of these differences, the thermal behavior (TG/DTA) of both materials is very similar with decomposition starting at around 160 °C and CuO as the final product. In contrast to this, FT-IR and Raman frequencies are markedly different for the two isomers and the UV-vis absorption spectra in solution show marked differences in the π-π* absorptions at 263 (CuL2) or 270 (CuL1) nm and in the ligand-to-metal charge transfer bands at around 320 nm which are pronounced for CuL1 with the higher symmetry at the Cu(II) center, but very weak for CuL2. The T-dependent susceptibility measurements also show very similar results (µeff = 1.98 µB for CuL1 and 2.00 µB for CuL2 and very small Curie-Weiss constants of about -1. The EPR spectra of both complexes show axial symmetry, very similar averaged g values of 2.123 and 2.125, respectively, and no hyper-fine splitting.
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5
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Betancourth JG, Sánchez-Rodríguez NE, Giraldo-Dávila D, Combariza MY, Chaur MN. Self-Assembled Co(II) and Zn(II) Complexes with Soluble Bis(Hydrazone)Thiopyrimidine-Based Ligands: Electrochemical and Temperature-Dependent Properties. RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622600782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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6
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Thangavel MK, Harrowfield J, Bailly C, Karmazin L, Stadler AM. Modulation of the structural information in shape-defined heterocyclic strands: the case of a (pyridine-hydrazone) 2pyrazine ligand. Dalton Trans 2022; 51:14107-14117. [PMID: 36043361 DOI: 10.1039/d2dt01684b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal ions (Ag+, Cd2+, Eu3+, Sm3+) and protons can, through coordination and protonation, modulate in three specific ways the structural information contained in the pyrazine-based heterocyclic strand L (obtained from 2,5-bis(methylhydrazino)pyrazine and 2 equivalents of 2-pyridinecarboxaldehyde), thus generating two linear rod-like conformations and a bent one. This conformational diversity is associated with a structural one that consists of two diprotonated forms (H2L(PF6)2 and H2L(CF3SO3)2), a polymeric architecture [AgL]n(CF3SO3)n, two rack-like complexes ([Eu2H2L3(CF3SO3)6](PF6)2 and [Sm2H2L3(CF3SO3)6](PF6)2) and a grid-like structure ([Cd4L4](CF3SO3)8).
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Affiliation(s)
- Muthu Kumar Thangavel
- Institut de Chimie, Université de Strasbourg, Strasbourg, France.,Institut de Science et d'Ingénierie Supramoléculaires (ISIS), UMR 7006, CNRS - Université de Strasbourg, 8 Allée Gaspard Monge, 67000 Strasbourg, France.
| | - Jack Harrowfield
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), UMR 7006, CNRS - Université de Strasbourg, 8 Allée Gaspard Monge, 67000 Strasbourg, France.
| | - Corinne Bailly
- Service de Radiocristallographie, Université de Strasbourg, 1 Rue Blaise Pascal, 67000 Strasbourg, France
| | - Lydia Karmazin
- Service de Radiocristallographie, Université de Strasbourg, 1 Rue Blaise Pascal, 67000 Strasbourg, France
| | - Adrian-Mihail Stadler
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), UMR 7006, CNRS - Université de Strasbourg, 8 Allée Gaspard Monge, 67000 Strasbourg, France. .,University of Strasbourg Institute for Advanced Study (USIAS), 5 Allée du Général Rouvillois, 67083 Strasbourg, France.,Institut für Nanotechnologie (INT), Karlsruhe Institut für Technologie (KIT), 76344 Eggenstein-Leopoldshafen, Germany
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7
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Singh J, Panda SK, Singh AK. Recent developments in supramolecular complexes of azabenzenes containing one to four N atoms: synthetic strategies, structures, and magnetic properties. RSC Adv 2022; 12:18945-18972. [PMID: 35873336 PMCID: PMC9240818 DOI: 10.1039/d2ra03455g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 06/20/2022] [Indexed: 11/25/2022] Open
Abstract
For the last couple of decades, azabenzene-based ligands have drawn much attention from inorganic chemists due to their ability to coordinate with different metal ions to form supramolecular clusters. These azabenzenes are weak σ donors and strong π acceptors and electron-deficient. Metallogrid complexes and non-grid oligomers are well-defined supramolecular clusters, formed by appropriate chelating ligands, and can show interesting optical, magnetic, and electronic properties. Self-assembly of [n × n] metallogrid complexes is dominated by the entropic factor while the formation of oligonuclear metal ion complexes is dominated by other effects like CFSE, electrostatic factors, ligand conformational characters, etc. Herein, the present article gives an overview of six-membered heterocyclic azine-based ligands and their potential for different metal ions to form polynuclear complexes. Moreover, their temperature-dependent magnetic properties and SCO phenomena are well described and tabulated.
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Affiliation(s)
- Juhi Singh
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar Bhubaneswar 752 050 India
| | - Suvam Kumar Panda
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar Bhubaneswar 752 050 India
| | - Akhilesh Kumar Singh
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar Bhubaneswar 752 050 India
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8
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Velazquez-Garcia JDJ, Basuroy K, Storozhuk D, Wong J, Demeshko S, Meyer F, Henning R, Techert S. Metal-to-metal communication during the spin state transition of a [2 × 2] Fe(II) metallogrid at equilibrium and out-of-equilibrium conditions. Dalton Trans 2022; 51:6036-6045. [PMID: 35352719 DOI: 10.1039/d1dt04255f] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Spin crossover (SCO) complexes are prototypes of materials with bi- or multi-stability in the solid state. The structural evolution during their spin transition is a key feature to establish the foundations of how to utilize this type of material. So far, ultrafast time-resolved structural investigations of SCO solids have been focused on monometallic complexes, though an increasing number of oligometallic SCO complexes showing cooperativity effects are being reported. Here, we used single crystal X-ray crystallography and time-resolved pink Laue photocrystallography to study the molecular reorganisation during the thermal and photoinduced SCO of a [2 × 2] tetranuclear metallogrid of the form [FeII4LMe4](BF4)4·2MeCN ([LMe]- = 4-methyl-3,5-bis{6-(2,2'-bipyridyl)}pyrazolate). A multitemperature crystallographic investigation on single crystals reveals an effective communication between the metal centres during thermal SCO, observed by the simultaneous transformation of the coordination polyhedra of both crystallographic-symmetry independent metal atoms accompanying the SCO in only one of them. Time-resolved photocrystallography results reveal the different molecular responses between mononuclear and oligonuclear complexes, after light irradiation with a picosecond laser pulse. While mononuclear SCO complexes reorganise once during the first nanosecond after excitation, the tetranuclear metallogrid exhibits a multiple structural rearrangement in the same span of time. Such behaviour is attributed to the elastic communication between metal atoms, which allows the propagation of a short-range elastic distortion over the entire Fe4 grid complex. The present study sheds light on the importance of strong elastic coupling of metal atoms during the correlated spin transition of oligometallic complexes.
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Affiliation(s)
- Jose de Jesus Velazquez-Garcia
- Photon Science - Structural Dynamics in Chemical Systems, Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany.
| | - Krishnayan Basuroy
- Photon Science - Structural Dynamics in Chemical Systems, Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany.
| | - Darina Storozhuk
- Photon Science - Structural Dynamics in Chemical Systems, Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany.
| | - Joanne Wong
- Institut für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße 4, D-37077 Göttingen, Germany
| | - Serhiy Demeshko
- Institut für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße 4, D-37077 Göttingen, Germany
| | - Franc Meyer
- Institut für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße 4, D-37077 Göttingen, Germany
| | - Robert Henning
- Center for Advanced Radiation Sources, The University of Chicago, Argonne National Laboratory, 9700 South Cass Ave, Lemont, Illinois, 90439, USA
| | - Simone Techert
- Photon Science - Structural Dynamics in Chemical Systems, Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany.
- Institut für Röntgenphysik, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, D-37077 Göttingen, Germany
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9
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Day E, Kauffmann B, Scarpi‐Luttenauer M, Chaumont A, Henry M, Mobian P. An Alternate [2×2] Grid Constructed Around TiO
4
N
2
Units. Chemistry 2022; 28:e202200047. [DOI: 10.1002/chem.202200047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Erin Day
- Laboratoire de Chimie Moléculaire de l'Etat Solide UMR 7140 UDS-CNRS Université de Strasbourg 4 rue Blaise Pascal 67000 Strasbourg France
| | - Brice Kauffmann
- Univ. Bordeaux IECB, UMS 3033/US 001 2 rue Robert Escarpit 33607 Pessac France
| | - Matthieu Scarpi‐Luttenauer
- Laboratoire de Chimie Moléculaire de l'Etat Solide UMR 7140 UDS-CNRS Université de Strasbourg 4 rue Blaise Pascal 67000 Strasbourg France
| | - Alain Chaumont
- Laboratoire de Modélisation et Simulations Moléculaires UMR 7140 UDS-CNRS Université de Strasbourg 4 rue Blaise Pascal 67000 Strasbourg France
| | - Marc Henry
- Laboratoire de Chimie Moléculaire de l'Etat Solide UMR 7140 UDS-CNRS Université de Strasbourg 4 rue Blaise Pascal 67000 Strasbourg France
| | - Pierre Mobian
- Laboratoire de Chimie Moléculaire de l'Etat Solide UMR 7140 UDS-CNRS Université de Strasbourg 4 rue Blaise Pascal 67000 Strasbourg France
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10
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Li XZ, Tian CB, Sun QF. Coordination-Directed Self-Assembly of Functional Polynuclear Lanthanide Supramolecular Architectures. Chem Rev 2022; 122:6374-6458. [PMID: 35133796 DOI: 10.1021/acs.chemrev.1c00602] [Citation(s) in RCA: 74] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Lanthanide supramolecular chemistry is a fast growing and intriguing research field due to the unique photophysical, magnetic, and coordination properties of lanthanide ions (LnIII). Compared with the intensively investigated mononuclear Ln-complexes, polymetallic lanthanide supramolecular assemblies offer more structural superiority and functional advantages. In recent decades, significant progress has been made in polynuclear lanthanide supramolecules, varying from structural evolution to luminescent and magnetic functional materials. This review summarizes the design principles in ligand-induced coordination-driven self-assembly of polynuclear Ln-structures and intends to offer guidance for the construction of more elegant Ln-based architectures and optimization of their functional performances. Design principles concerning the water solubility and chirality of the lanthanide-organic assemblies that are vital in extending their applications are emphasized. The strategies for improving the luminescent properties and the applications in up-conversion, host-guest chemistry, luminescent sensing, and catalysis have been summarized. Magnetic materials based on supramolecular assembled lanthanide architectures are given in an individual section and are classified based on their structural features. Challenges remaining and perspective directions in this field are also briefly discussed.
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Affiliation(s)
- Xiao-Zhen Li
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, People's Republic of China
| | - Chong-Bin Tian
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, People's Republic of China
| | - Qing-Fu Sun
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, People's Republic of China
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11
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Clauss R, Hey-Hawkins E. Phosphorus guiding palladium: [4+4] metallomacrocyclic PdII complex and self-assembly of heterometallic Pd II/Zn II grid-type complex. Dalton Trans 2022; 51:9632-9641. [DOI: 10.1039/d2dt01176j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of heteroditopic ligand 1 featuring a hard pyridine-hydrazone-pyrimidine (N,N,N) site and a softer pyrimidine-hydrazone-phosphane (N,N,P) pocket with [Pd(CH3CN4)](OTf)2 in different metal-to-ligand ratios (M:L) gave the homobimetallic PdII complex...
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12
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Magneto-structural studies of a one dimensional Mn(II) coordination polymer derived from a flexible polydentate ligand. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Anwar MU, Al-Harrasi A, Rawson JM. Structures, properties and applications of Cu(II) complexes with tridentate donor ligands. Dalton Trans 2021; 50:5099-5108. [PMID: 33881088 DOI: 10.1039/d1dt00483b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Tridentate ligands offer theree donor atoms to coordinate to metal ions. The remaining vacant coordination sites on the metal ions provided opportunities to implement additional co-ligands to generate complexes with desired properties. Herein we discuss selected examples of Cu(ii) complexes with tridentate ligands utilizing combinations of N, O, S, and Se donors, focusing on effects of ligand flexibility/rigidity on their coordination modes, properties and applications.
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Affiliation(s)
- Muhammad Usman Anwar
- Natural and Medical Sciences Research Centre, University of Nizwa, Birkat Almouz 616, Oman.
| | - Ahmed Al-Harrasi
- Natural and Medical Sciences Research Centre, University of Nizwa, Birkat Almouz 616, Oman.
| | - Jeremy M Rawson
- Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Ave, Windsor, ON N9B3P4, Canada.
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14
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Guo Z, Deng YF, Pikramenou Z, Dunbar KR, Zhang YZ. Strong Coupling and Slow Relaxation of the Magnetization for an Air-Stable [Co 4] Square with Both Tetrazine Radicals and Azido Bridges. Inorg Chem 2021; 60:3651-3656. [PMID: 33656338 DOI: 10.1021/acs.inorgchem.0c03158] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Introducing both tetrazine radical and azido bridges afforded two air-stable square complexes [MII4(bpztz•-)4(N3)4] (MII = Zn2+, 1; Co2+, 2; bpztz = 3,6-bis(3,5-dimethylpyrazolyl)-1,2,4,5-tetrazine), where the metal ions are cobridged by μ1,1-azido bridges and tetrazine radicals. Magnetic studies revealed strong antiferromagnetic metal-radical interaction with a coupling constant of -64.7 cm-1 in the 2J formalism in 2. Remarkably, 2 exhibits slow relaxation of magnetization with an effective barrier for spin reverse of 96 K at zero applied field.
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Affiliation(s)
- Zhilin Guo
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China.,School of Chemistry, The University of Birmingham, Edgbaston B15 2TT, United Kingdom
| | - Yi-Fei Deng
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Zoe Pikramenou
- School of Chemistry, The University of Birmingham, Edgbaston B15 2TT, United Kingdom
| | - Kim R Dunbar
- Department of Chemistry, Texas A&M University, College Station, Texas 77842, United States
| | - Yuan-Zhu Zhang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
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15
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Shahni RK, Amjaour H, Krupinsky B, Reagen S, Wang ZD, Wu X, Nkemngong D, Zhao JX, Ugrinov A, Robertson J, Chu QR. Biomass-derived rctt-3,4-di-2-furanyl-1,2-cyclobutanedicarboxylic acid: a polytopic ligand for synthesizing green metal-organic materials. J COORD CHEM 2021. [DOI: 10.1080/00958972.2021.1878500] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Rahul K. Shahni
- Department of Chemistry, University of North Dakota, Grand Forks, ND, USA
| | - Houssein Amjaour
- Department of Chemistry, University of North Dakota, Grand Forks, ND, USA
| | - Briana Krupinsky
- Department of Chemistry, University of North Dakota, Grand Forks, ND, USA
| | - Sarah Reagen
- Department of Chemistry, University of North Dakota, Grand Forks, ND, USA
| | - Zijun D. Wang
- Department of Chemistry, University of North Dakota, Grand Forks, ND, USA
| | - Xu Wu
- Department of Chemistry, University of North Dakota, Grand Forks, ND, USA
| | - Dominic Nkemngong
- Department of Chemistry, University of North Dakota, Grand Forks, ND, USA
| | - Julia X. Zhao
- Department of Chemistry, University of North Dakota, Grand Forks, ND, USA
| | - Angel Ugrinov
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, ND, USA
| | - Joseph Robertson
- Department of Chemistry, University of North Dakota, Grand Forks, ND, USA
| | - Qianli Rick Chu
- Department of Chemistry, University of North Dakota, Grand Forks, ND, USA
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16
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Ligand structure-driven self-assembly of Zn(NCS)2 with a carbohydrazone ligand: A possible intermediate towards a [2 × 2] metallic grid. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129269] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Holub J, Santoro A, Stadler MA, Lehn JM. Peripherally multi-functionalised metallosupramolecular grids: assembly, decoration, building blocks for dynamic covalent architectures. Inorg Chem Front 2021. [DOI: 10.1039/d1qi01084k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The sequential assembly of first terminally functionalized bishydrazone ligands followed by their coordination with Zn(ii) metal cations yields peripherally multi-functionalized [2 × 2] grid-type complexes.
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Affiliation(s)
- Jan Holub
- Laboratoire de Chimie Supramoléculaire, ISIS, Université de Strasbourg, 8 Allée Gaspard Monge, 67000 Strasbourg, France
| | - Antonio Santoro
- Laboratoire de Chimie Supramoléculaire, ISIS, Université de Strasbourg, 8 Allée Gaspard Monge, 67000 Strasbourg, France
| | - Mihail-Adrian Stadler
- Laboratoire de Chimie Supramoléculaire, ISIS, Université de Strasbourg, 8 Allée Gaspard Monge, 67000 Strasbourg, France
| | - Jean-Marie Lehn
- Laboratoire de Chimie Supramoléculaire, ISIS, Université de Strasbourg, 8 Allée Gaspard Monge, 67000 Strasbourg, France
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18
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Design and self-assembly of new [2 × 2] grids constructed by lanthanide ions and a Schiff base. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.108067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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19
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Shah SR, Shah Z, Khiat M, Khan A, Hill LR, Khan S, Hussain J, Csuk R, Anwar MU, Al-Harrasi A. Complexes of N- and O-Donor Ligands as Potential Urease Inhibitors. ACS OMEGA 2020; 5:10200-10206. [PMID: 32391508 PMCID: PMC7203987 DOI: 10.1021/acsomega.0c01089] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 04/09/2020] [Indexed: 06/11/2023]
Abstract
We report five new transition-metal complexes that inhibit the urease enzyme. Barbituric acid (BTA), thiobarbituric acid (TBA), isoniazid (INZ), and nicotinamide (NCA) ligands were employed in complexation reactions. The resulting complexes were characterized using a variety of analytical techniques including infra-red and UV-vis spectroscopy, 1H NMR spectroscopy, elemental analysis, and single-crystal X-ray diffraction analysis. We describe two mononuclear complexes with a general formula {[M(NCA)2(H2O)4](BTA)2(H2O)}, where M = Co (1) and Zn (2), a mononuclear complex {[Ni(NCA)2(H2O)4](TBA)2(H2O)} (3), and two polymeric chains of a general formula {[M(INZ) (H2O)3](BTA)2(H2O)3}, where M = Co (4) and Zn (5). These complexes displayed significant urease enzyme inhibition with IC50 values in the range of 3.9-19.9 μM.
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Affiliation(s)
- Syed Raza Shah
- Natural
and Medical Sciences Research Centre, University
of Nizwa, Birkat Almouz, Nizwa 616, Oman
- Department
of Chemistry, Bacha Khan University Charsadda, Charsadda 24420 Khyber Pakhtunkhwa, Pakistan
| | - Zarbad Shah
- Department
of Chemistry, Bacha Khan University Charsadda, Charsadda 24420 Khyber Pakhtunkhwa, Pakistan
| | - Mohammed Khiat
- Natural
and Medical Sciences Research Centre, University
of Nizwa, Birkat Almouz, Nizwa 616, Oman
| | - Ajmal Khan
- Natural
and Medical Sciences Research Centre, University
of Nizwa, Birkat Almouz, Nizwa 616, Oman
| | - Leila R. Hill
- Chemistry
Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K.
| | - Shakeel Khan
- Department
of Chemistry, Bacha Khan University Charsadda, Charsadda 24420 Khyber Pakhtunkhwa, Pakistan
| | - Javid Hussain
- Department
of Biological Sciences and Chemistry, University
of Nizwa, Birkat Almouz, Nizwa 616, Oman
| | - René Csuk
- Organic
Chemistry, Martin-Luther-University Halle-Wittenberg, Kurt-Mothes-Str. 2, Halle (Saale) d-06120, Germany
| | - Muhammad U. Anwar
- Natural
and Medical Sciences Research Centre, University
of Nizwa, Birkat Almouz, Nizwa 616, Oman
| | - Ahmed Al-Harrasi
- Natural
and Medical Sciences Research Centre, University
of Nizwa, Birkat Almouz, Nizwa 616, Oman
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20
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Synthesis, crystal structure and magnetic properties of a pentanuclear Mn(III) cluster with 1,2,4-triazole based Schiff base ligand. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119461] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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21
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Ayme JF, Lehn JM, Bailly C, Karmazin L. Simultaneous Generation of a [2 × 2] Grid-Like Complex and a Linear Double Helicate: a Three-Level Self-Sorting Process. J Am Chem Soc 2020; 142:5819-5824. [DOI: 10.1021/jacs.0c00896] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Jean-François Ayme
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
- Laboratoire de Chimie Supramoléculaire, Institut de Science et d’Ingénierie Supramoléculaires, Université de Strasbourg, 8 allée Gaspard Monge, 67000 Strasbourg, France
| | - Jean-Marie Lehn
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
- Laboratoire de Chimie Supramoléculaire, Institut de Science et d’Ingénierie Supramoléculaires, Université de Strasbourg, 8 allée Gaspard Monge, 67000 Strasbourg, France
| | - Corinne Bailly
- Service de Radiocristallographie, Fédération de chimie Le Bel FR2010, Université de Strasbourg, 1 rue Blaise Pascal, 67008 Strasbourg, France
| | - Lydia Karmazin
- Service de Radiocristallographie, Fédération de chimie Le Bel FR2010, Université de Strasbourg, 1 rue Blaise Pascal, 67008 Strasbourg, France
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22
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Doistau B, Jiménez JR, Guerra S, Besnard C, Piguet C. Key Strategy for the Rational Incorporation of Long-Lived NIR Emissive Cr(III) Chromophores into Polymetallic Architectures. Inorg Chem 2020; 59:1424-1435. [PMID: 31909978 DOI: 10.1021/acs.inorgchem.9b03163] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The CrIIIN6 chromophores are particularly appealing for low-energy sensitization via energy transfer processes since they show extremely long excited state lifetimes reaching the millisecond range in the technologically crucial near-infrared domain. However, their properties were barely harnessed in multimetallic structures because of the lack of both monitoring methods and accessible synthetic pathways. We herein report a remedy to monitor and control the formation of CrIII-containing assemblies in solution via the design of a CrIIIN6 inert "complex-as-ligand" that can be included into polymetallic architectures. As a proof of concept, these CrN6 building blocks were reacted in solution with ZnII or FeII to give extended trinuclear linear Cr-M-Cr assemblies, the structure of which could be addressed by NMR spectroscopy despite the presence of two slowly relaxing CrIII paramagnetic centers. In addition to long CrIII excited state lifetimes and weak sensitivity to oxygen quenching, these polymetallic assemblies display controlled CrIII to MII energy transfers, which pave the way for use of the "complex-as-ligand" strategy for introducing photophysically active CrIII probes into light-converting polymetallic devices.
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Affiliation(s)
- Benjamin Doistau
- Department of Inorganic and Analytical Chemistry , University of Geneva , 30 quai Ernest Ansermet , CH-1211 Geneva 4 , Switzerland
| | - Juan-Ramón Jiménez
- Department of Inorganic and Analytical Chemistry , University of Geneva , 30 quai Ernest Ansermet , CH-1211 Geneva 4 , Switzerland
| | - Sebastiano Guerra
- Department of Inorganic and Analytical Chemistry , University of Geneva , 30 quai Ernest Ansermet , CH-1211 Geneva 4 , Switzerland
| | - Céline Besnard
- Laboratory of Crystallography , University of Geneva , 24 quai Ernest Ansermet , CH-1211 Geneva 4 , Switzerland
| | - Claude Piguet
- Department of Inorganic and Analytical Chemistry , University of Geneva , 30 quai Ernest Ansermet , CH-1211 Geneva 4 , Switzerland
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23
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Duan L, Wang X, Gu Y, Hou Y, Gong P. Regioselective construction of pyridazine and tetrahydrocinnoline derivatives via [4 + 2] cycloaddition–elimination with α-halogeno hydrazones and enaminones. Org Chem Front 2020. [DOI: 10.1039/d0qo00555j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Herein, we report the de novo construction of pyridazine scaffolds via a [4 + 2] cycloaddition–elimination reaction with α-halogeno hydrazones and enaminones.
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Affiliation(s)
- Liancheng Duan
- School of Pharmaceutical Engineering
- Shenyang Pharmaceutical University
- Shenyang
- China
| | - Xin Wang
- School of Pharmaceutical Engineering
- Shenyang Pharmaceutical University
- Shenyang
- China
| | - Yucheng Gu
- Syngenta Jealott's Hill International Research Center
- Berkshire RG42 6EY
- UK
| | - Yunlei Hou
- School of Pharmaceutical Engineering
- Shenyang Pharmaceutical University
- Shenyang
- China
| | - Ping Gong
- School of Pharmaceutical Engineering
- Shenyang Pharmaceutical University
- Shenyang
- China
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24
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Mahmoudi G, Lawrence SE, Cisterna J, Cárdenas A, Brito I, Frontera A, Safin DA. A new spodium bond driven coordination polymer constructed from mercury(ii) azide and 1,2-bis(pyridin-2-ylmethylene)hydrazine. NEW J CHEM 2020. [DOI: 10.1039/d0nj04444j] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In this manuscript, the synthesis and X-ray characterization of a new spodium bond driven coordination polymer constructed from mercury(ii) azide and 1,2-bis(pyridin-2-ylmethylene)hydrazine are reported.
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Affiliation(s)
- Ghodrat Mahmoudi
- Department of Chemistry
- Faculty of Science
- University of Maragheh
- Maragheh
- Iran
| | - Simon E. Lawrence
- School of Chemistry, Analytical and Biological Chemistry Research Facility
- Synthesis and Solid State Pharmaceutical Centre
- University College Cork
- Cork
- UK
| | - Jonathan Cisterna
- Departamento de Química
- Facultad de Ciencias Básicas
- Universidad de Antofagasta
- Antofagasta
- Chile
| | - Alejandro Cárdenas
- Departamento de Física
- Facultad de Ciencias Básicas
- Universidad de Antofagasta
- Antofagasta
- Chile
| | - Iván Brito
- Departamento de Química
- Facultad de Ciencias Básicas
- Universidad de Antofagasta
- Antofagasta
- Chile
| | - Antonio Frontera
- Departament de Química
- Universitat de les Illes Balears
- 07122 Palma de Mallorca
- Spain
| | - Damir A. Safin
- University of Tyumen
- 625003 Tyumen
- Russian Federation
- West-Siberian Interregional Scientific and Educational Center
- Russian Federation
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25
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Topić E, Landripet I, Duguin M, Pisk J, Đilović I, Vrdoljak V, Rubčić M. Coordinating and supramolecular prospects of unsymmetrically substituted carbohydrazides. NEW J CHEM 2020. [DOI: 10.1039/d0nj03106b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Unsymmetrically substituted carbohydrazides serve as multifunctional ligands, practicing their chelating and supramolecular roles with cis-dioxomolybdenum(vi) cationic core and the Lindqvist anion.
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Affiliation(s)
- Edi Topić
- University of Zagreb
- Faculty of Science
- Department of Chemistry
- 10000 Zagreb
- Croatia
| | - Ivana Landripet
- Ruđer Bošković Institute
- Division of Materials Chemistry
- 10000 Zagreb
- Croatia
| | - Maëlle Duguin
- INP-ENSIACET
- 31030 Toulouse
- France
- Sleever Technologies
- ZA Gabor
| | - Jana Pisk
- University of Zagreb
- Faculty of Science
- Department of Chemistry
- 10000 Zagreb
- Croatia
| | - Ivica Đilović
- University of Zagreb
- Faculty of Science
- Department of Chemistry
- 10000 Zagreb
- Croatia
| | - Višnja Vrdoljak
- University of Zagreb
- Faculty of Science
- Department of Chemistry
- 10000 Zagreb
- Croatia
| | - Mirta Rubčić
- University of Zagreb
- Faculty of Science
- Department of Chemistry
- 10000 Zagreb
- Croatia
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26
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Topić E, Pisk J, Agustin D, Jendrlin M, Cvijanović D, Vrdoljak V, Rubčić M. Discrete and polymeric ensembles based on dinuclear molybdenum( vi) building blocks with adaptive carbohydrazide ligands: from the design to catalytic epoxidation. NEW J CHEM 2020. [DOI: 10.1039/d0nj01045f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Discrete and polymeric ensembles based on dimolybdenum(vi) units with adaptive carbohydrazide ligands are described. The polymeric complexes are efficient catalysts for cyclooctene epoxidation under eco-friendly conditions.
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Affiliation(s)
- Edi Topić
- University of Zagreb
- Faculty of Science
- Department of Chemistry
- Croatia
| | - Jana Pisk
- University of Zagreb
- Faculty of Science
- Department of Chemistry
- Croatia
| | | | - Martin Jendrlin
- University of Zagreb
- Faculty of Science
- Department of Chemistry
- Croatia
| | - Danijela Cvijanović
- University of Zagreb
- School of Medicine
- Department of Chemistry and Biochemistry
- Croatia
| | - Višnja Vrdoljak
- University of Zagreb
- Faculty of Science
- Department of Chemistry
- Croatia
| | - Mirta Rubčić
- University of Zagreb
- Faculty of Science
- Department of Chemistry
- Croatia
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27
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Guo Z, Deng YF, Zhang Y, Pikramenou Z, Zhang YZ. Two azido-bridged [2×2] cobalt(ii) grids featuring single-molecule magnet behaviour. Dalton Trans 2020; 49:9218-9222. [DOI: 10.1039/d0dt01461c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two Co(ii) [2 × 2] grid-like clusters containing both pyridazine and azido bridges were reported to exhibit overall intramolecular ferromagnetic coupling and field-induced single-molecule magnet behavior with the effective energy barriers up to 56 K.
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Affiliation(s)
- Zhilin Guo
- Department of Chemistry
- Southern University of Science and Technology (SUSTech)
- Shenzhen
- P. R. China
- School of Chemistry
| | - Yi-Fei Deng
- Department of Chemistry
- Southern University of Science and Technology (SUSTech)
- Shenzhen
- P. R. China
| | - Yipei Zhang
- Department of Chemistry
- Southern University of Science and Technology (SUSTech)
- Shenzhen
- P. R. China
| | - Zoe Pikramenou
- School of Chemistry
- The University of Birmingham
- Edgbaston B15 2TT
- UK
| | - Yuan-Zhu Zhang
- Department of Chemistry
- Southern University of Science and Technology (SUSTech)
- Shenzhen
- P. R. China
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28
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Mahmoudi G, Afkhami FA, Kennedy AR, Zubkov FI, Zangrando E, Kirillov AM, Molins E, Mitoraj MP, Safin DA. Lead(ii) coordination polymers driven by pyridine-hydrazine donors: from anion-guided self-assembly to structural features. Dalton Trans 2020; 49:11238-11248. [DOI: 10.1039/d0dt01704c] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This work unveils an indispensable role of London dispersion forces and relativistic effects in tetrel and covalent bonds of the type Pb–X (X = O, N, S, I), which drives formation of extended architectures of lead(ii) coordination polymers.
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Affiliation(s)
- Ghodrat Mahmoudi
- Department of Chemistry
- Faculty of Science
- University of Maragheh
- Maragheh
- Iran
| | | | - Alan R. Kennedy
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow G1 1XL
- UK
| | - Fedor I. Zubkov
- Organic Chemistry Department
- Faculty of Science
- Peoples’ Friendship University of Russia (RUDN University)
- Moscow
- Russian Federation
| | - Ennio Zangrando
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- Trieste
- Italy
| | - Alexander M. Kirillov
- Centro de Química Estrutural
- Complexo I
- Instituto Superior Técnico
- Universidade de Lisboa
- Lisboa
| | - Elies Molins
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)
- Campus de la Universitat Autònoma de Barcelona
- 08193 Bellaterra
- Spain
| | - Mariusz P. Mitoraj
- Department of Theoretical Chemistry
- Faculty of Chemistry
- Jagiellonian University
- 30-387 Cracow
- Poland
| | - Damir A. Safin
- University of Tyumen
- 625003 Tyumen
- Russian Federation
- West-Siberian Interregional Scientific and Educational Center
- Russian Federation
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29
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Capel Berdiell I, Farmiloe SE, Kulmaczewski R, Halcrow MA. Molecular squares, coordination polymers and mononuclear complexes supported by 2,4-dipyrazolyl-6H-1,3,5-triazine and 4,6-dipyrazolylpyrimidine ligands. Dalton Trans 2019; 48:17310-17320. [PMID: 31720621 DOI: 10.1039/c9dt04003j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The Fe[BF4]2 complex of 2,4-di(pyrazol-1-yl)-6H-1,3,5-triazine (L1) is a high-spin molecular square, [{Fe(L1)}4(μ-L1)4][BF4]8, whose crystals also contain the unusual HPzBF3 (HPz = pyrazole) adduct. Three other 2,4-di(pyrazol-1-yl)-6H-1,3,5-triazine derivatives with different pyrazole substituents (L2-L4) are unstable in the presence of first row transition ions, but form mononuclear, polymeric or molecular square complexes with silver(i). Most of these compounds involve bis-bidentate di(pyrazolyl)triazine coordination, which is unusual for that class of ligand, and the molecular squares encapsulate one or two BF4-, ClO4- or SbF6- ions through combinations of anionπ, AgX and/or C-HX (X = O or F) interactions. Treatment of Fe[NCS]2 or Fe[NCSe]2 with 4,6-di(pyrazol-1-yl)-2H-pyrimidine (L5) or its 2-methyl and 2-amino derivatives (L6 and L7) yields mononuclear [Fe(NCE)2L2] and/or the 1D coordination polymers catena-[Fe(NCE)2(μ-L)] (E = S or Se, L = L5-L7). Alcohol solvates of isomorphous [Fe(NCS)2L2] and [Fe(NCSe)2L2] compounds show different patterns of intermolecular hydrogen bonding, reflecting the acceptor properties of the anion ligands. These iron compounds are all high-spin, although annealing solvated crystals of [Fe(NCSe)2(L5)2] affords a new phase exhibiting an abrupt, low-temperature spin transition. Catena-[Fe(H2O)2(μ-L5)][ClO4]2 is a coordination polymer of alternating cis and trans iron centres.
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Affiliation(s)
- Izar Capel Berdiell
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK.
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30
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Wong JWL, Demeshko S, Dechert S, Meyer F. Heterometallic Ru 2Co 2 [2 × 2] Grid with Localized Single Molecule Magnet Behavior. Inorg Chem 2019; 58:13337-13345. [PMID: 31502457 DOI: 10.1021/acs.inorgchem.9b02214] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Metal complexes with a [n × n] gridlike structure are discussed as attractive building blocks for various materials chemistry applications in molecular nanotechnology and electronics, which often rely on the grids' magnetic and redox properties. Most of the known metallogrids are homometallic, though heterometallic systems that comprise two or more different metals promise higher level functionalities. However, heterometallic [n × n] grids are relatively rare, mostly because of the more challenging synthetic strategies. To that end a new heterometallic [2 × 2] grid complex [L4Ru2Co2](BF4)4 (2) based on a known pyrazolate-bridged bis(tridentate) compartmental N-donor ligand [L]- is presented in this work, along with its doubly oxidized congener [L4Ru2Co2](BF4)6 (3). In order to prevent scrambling of the different metal ions, a stepwise synthetic approach was implemented in which an inert RuII "corner complex" [(HL)2Ru](BF4)2 (1) was isolated first, followed by addition of the more labile CoII. This exclusively yields the desired [L4Ru2Co2]4+ with anti-topology, viz., with the RuII and CoII ions situated at opposite corners of the [2 × 2] grid, as confirmed by single crystal X-ray diffraction. 2 can be sequentially oxidized four times, first at the Co vertices and then at the Ru vertices. 1H NMR spectroscopy as well as ESI mass spectrometry evidenced integrity of the [L4Ru2Co2]4+/6+ grids in solution. Structural and magnetic analyses revealed that paramagnetic 2 features LS-RuII and HS-CoII ions (LS = low-spin, HS = high-spin) whereas LS-RuII and LS-CoIII ions are present in diamagnetic 3. The LS-RuII ions in 2 serve to magnetically isolate the HS-CoII whose coordination geometry is strongly distorted from octahedral. A large and negative axial zero-field splitting value (D = -64 cm-1) for the local S = 3/2 ions is shown to lead to single molecule magnetic (SMM) properties characterized by a barrier to spin inversion of Ueff = 8.8 cm-1 and a single relaxation process with τo = 3.1 × 10-5 s. Transition metal [2 × 2] grid complexes showing SMM behavior are extremely rare, and this is the first heterometallic 3d/4d grid system featuring such a magnetic signature.
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Affiliation(s)
- Joanne W L Wong
- Universität Göttingen , Institut für Anorganische Chemie , Tammannstrasse 4 , D-37077 Göttingen , Germany
| | - Serhiy Demeshko
- Universität Göttingen , Institut für Anorganische Chemie , Tammannstrasse 4 , D-37077 Göttingen , Germany
| | - Sebastian Dechert
- Universität Göttingen , Institut für Anorganische Chemie , Tammannstrasse 4 , D-37077 Göttingen , Germany
| | - Franc Meyer
- Universität Göttingen , Institut für Anorganische Chemie , Tammannstrasse 4 , D-37077 Göttingen , Germany
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31
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Gusev A, Nemec I, Herchel R, Riush I, Titiš J, Boča R, Lyssenko K, Kiskin M, Eremenko I, Linert W. Structural and magnetic characterization of Ni(ii), Co(ii), and Fe(ii) binuclear complexes on a bis(pyridyl-triazolyl)alkane basis. Dalton Trans 2019; 48:10526-10536. [PMID: 31231741 DOI: 10.1039/c9dt01391a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Reactions of bis[5-(2-pyridyl)-1,2,4-triazol-3-yl]alkanes (alkane spacers = -CH2- in L2, -C3H6- in L3, -C4H8- in L4) with M(ii)A2 salts (M = Ni, Co, Fe) resulted in the preparation of five series of mononuclear ([M(L2)(H2O)2]2+, 1a-c) or binuclear ([M2(L3)2(H2O)4]4+, 2a-c; ([M2(L4)2(H2O)4]4+, 3a-c, [M2(L3)2(μ-ox)]2+, 4a-c; [M2(L4)2(μ-ox)]2+, 5a-c) complexes. The crystal structures of ten complexes were determined by single-crystal X-ray crystallography. Magnetic properties of the compounds were characterized by SQUID magnetometry and were analyzed by fitting on a spin Hamiltonian model. It was revealed that Fe(ii) and Co(ii) compounds exhibit non-negligible anisotropy and in the case of 2a-c and 3a-c complexes weak ferromagnetic interactions between the metal centers were observed. In the case of complexes containing an {M2(μ-ox)}2+ core strong antiferromagnetic interactions were observed within the dimer. Remarkably, solid state luminescence of Co(ii) and Fe(ii) complexes (1b, 2b, 3b and 1c, 2c, 3c) was observed.
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Affiliation(s)
- Alexey Gusev
- Crimean Federal University, Simferopol, 295007, Crimea, Russian Federation
| | - Ivan Nemec
- Department of Inorganic Chemistry, Faculty of Science, Palacký University, 77147 Olomouc, Czech Republic and Central European Institute of Technology, CEITEC BUT, Technická 3058/10, Brno, Czech Republic
| | - Radovan Herchel
- Department of Inorganic Chemistry, Faculty of Science, Palacký University, 77147 Olomouc, Czech Republic
| | - Irina Riush
- Crimean Federal University, Simferopol, 295007, Crimea, Russian Federation
| | - Ján Titiš
- Department of Chemistry, FPV, University of SS Cyril and Methodius, 91701 Trnava, Slovakia
| | - Roman Boča
- Department of Chemistry, FPV, University of SS Cyril and Methodius, 91701 Trnava, Slovakia
| | - Konstantin Lyssenko
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russian Federation
| | - Mikhail Kiskin
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, 119991, Russian Federation
| | - Igor Eremenko
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russian Federation and N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, 119991, Russian Federation
| | - Wolfgang Linert
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163-AC, A-1060 Vienna, Austria.
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32
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Lakma A, Hossain SM, van Leusen J, Kögerler P, Singh AK. Tetranuclear Mn II, Co II, Cu II and Zn II grid complexes of an unsymmetrical ditopic ligand: synthesis, structure, redox and magnetic properties. Dalton Trans 2019; 48:7766-7777. [PMID: 31066416 DOI: 10.1039/c9dt01041f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Synthesis towards the preparation of an unsymmetrical binucleating Schiff-base ligand, (H2L) is discussed. It has been synthesized by reacting methyl 6-(hydrazinecarbonyl)picolinate with 2-hydroxy acetophenone. The ligand (H2L) comprises two different asymmetric binding pockets; however, when reacted with Mn(ii), Co(ii), Cu(ii) and Zn(ii) salts, very stable self-assembled [2 × 2] grid complexes form regardless of the employed metal-to-ligand ratio. The obtained complexes [Mn4L4]·(CH3CN) (1), [Co4L4]·(CHCl3) (2), [Cu4L4]·(CHCl3) (3) and [Zn4L4] (4) have been fully characterized by physicochemical methods, including ESI mass spectrometry and X-ray crystallographic analyses, and their EPR, magnetic and redox properties are discussed. All discussed complexes self-assembled in a 'head-to-tail' fashion leading to [2 × 2] grid architectures. Mn, Co and Cu grid complexes show weak to moderate antiferromagnetic coupling among the four metal centers. The high stability of the grid structures is in line with the lack of any observable dissociation or exchange between metal ions in solution. Complexes 1 and 2 show four quasi-reversible to irreversible oxidative responses in cyclic voltammograms at a glassy carbon working electrode in 1,2-dichlorobenzene and at a platinum working electrode in dichloromethane, respectively.
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Affiliation(s)
- Avinash Lakma
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Bhubaneswar 752 050, India.
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33
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Anwar MU, Al-Harrasi A, Pilkington M, Gavey EL, Rawson JM. A linear tetranuclear Cu(II) complex exhibiting both ferro and antiferromagnetic couplings: Synthesis, characterization and magneto-structural studies. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.03.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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34
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Gusev A, Nemec I, Herchel R, Shul'gin V, Ryush I, Kiskin M, Efimov N, Ugolkova E, Minin V, Lyssenko K, Eremenko I, Linert W. Copper(ii) self-assembled clusters of bis((pyridin-2-yl)-1,2,4-triazol-3-yl)alkanes. Unusual rearrangement of ligands under reaction conditions. Dalton Trans 2019; 48:3052-3060. [PMID: 30758390 DOI: 10.1039/c8dt04816a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The reaction of two structurally related bridging ligands bis[5-(2-pyridyl)-1,2,4-triazole-3-yl]methane (H2L1) and bis[5-(2-pyridyl)-1,2,4-triazole-3-yl]ethane (H2L2) with copper(ii) salts resulted in a surprising wide variety of complex structures [Cu2(H2L1)Cl2]Cl2·4CH3OH (1), [Cu4(L1)4]·4H2O (2), [Cu(H2L2)(ClO4)2] (3) and [Cu3(OH)Na2(L')6](ClO4)·5H2O·C3H6O (4), where HL' is 3,5-bis-(pyridin-2-yl)-1,2,4-triazole, which were structurally characterized by the X-ray diffraction method. Complexes 1 and 2 were prepared on the H2L1 basis and have binuclear and tetranuclear structures, respectively, demonstrating strong impact of the type of counter anion on the coordination mode of the ligand. In contrast, the reaction between Cu(ClO4)2 6H2O and H2L2 led to the preparation of mononuclear complex 3. The reaction of H2L2 with Cu(ClO4)2 under alkaline conditions led to oxidative rearrangement of the ligand and the homoleptic pentanuclear complex 4 with anionic ligand L' was prepared. Magnetic properties were studied for compounds 1, 2 and 4 and for all of them the antiferromagnetic interactions between the Cu atoms were confirmed and analyzed by the spin Hamiltonian formalism. Furthermore, the occurrence of the antisymmetric exchange was confirmed in 4. The magnetic data analysis was supported by the X-band EPR measurements performed for complexes 1, 2 and 4.
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Affiliation(s)
- Alexey Gusev
- General and Physical Chemistry Department, V.I. Vernadsky Crimean Federal University, Acad. Vernadsky av. 4, Simferopol, 295007, Crimea.
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35
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Synthesis, structure and magnetic properties of Ni(II) and Cu(II), [2 × 2] grid complexes of pyrimidine-based symmetric ditopic ligands. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.10.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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36
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Abstract
Supramolecular metallogrid complexes are metalloclusters involving metal ions in planar array arrangements and organic ligands in perpendicular arrangements at each corner of the metal sites. Such essentially metal ion arrays have attracted great attention in the last three decades owing to their variety of interesting optical, electronic and magnetic properties. Among them, metallogrids containing more than one type of metal, that is heterometallic grids, are rare but have more potential to engineer a higher level functionality into one molecule. However, until now, only dozens of heterometallic grids have been reported without any specific review. Herein, we aim to give an overview of the assembly strategies, the physicochemical properties, and finally some perspectives on the future development of heterometallic grids.
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Affiliation(s)
- Qianqian Yang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China.
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37
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Singh S, Hogue RW, Feltham HLC, Brooker S. Dinuclear helicate and tetranuclear cage assembly using appropriately designed ditopic triazole-azine ligands. Dalton Trans 2019; 48:15435-15444. [DOI: 10.1039/c9dt01890e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Architecture, helicate or cage, is controlled by choice of meta vs. para phenylene linker in new, robust, ditopic triazole-pyrimidine ligands.
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Affiliation(s)
- Sandhya Singh
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Otago
- Dunedin 9054
- New Zealand
| | - Ross W. Hogue
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Otago
- Dunedin 9054
- New Zealand
| | - Humphrey L. C. Feltham
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Otago
- Dunedin 9054
- New Zealand
| | - Sally Brooker
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Otago
- Dunedin 9054
- New Zealand
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38
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Kusumoto S, Kobayashi F, Ohtani R, Zhang Y, Harrowfield J, Kim Y, Hayami S, Nakamura M. Creating capsules with cubanes. Dalton Trans 2018; 47:9575-9578. [PMID: 29972168 DOI: 10.1039/c8dt01911h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A sextuply linked capsule incorporating two Ni(ii) cubane units is formed when Ni(ii) salts are reacted with N-aminoalkyl salicylamidato ligands in a 4 : 3 ratio in methanol. With a short (propyl) alkyl substituent, additional chloride counter ions are included in the cavity by occupation of one apex of each of the linked cubanes, while with a longer (pentyl) substituent, perchlorate and tetrafluoroborate anions are included, probably by H-bonding involving hydroxyl groups on the inner apices of the cubanes, indicating that the cavity can be regarded as suited to binding of hydrophilic units despite the lipophilic character of its links. The dicubane capsules show ferromagnetic behaviour typical of Ni(ii) cubanes in general, with coupling constants dependent upon the nature of the salt-derived counter anions.
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Affiliation(s)
- Sotaro Kusumoto
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan.
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39
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Metal directed self-assembly of Tetranuclear
$$\hbox {Cu}^{\mathrm{II}}$$
Cu
II
and
$$\hbox {Ni}^{\mathrm{II}}$$
Ni
II
clusters. J CHEM SCI 2018. [DOI: 10.1007/s12039-018-1483-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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40
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Shiga T, Newton GN, Oshio H. Pre-programmed self-assembly of polynuclear clusters. Dalton Trans 2018; 47:7384-7394. [PMID: 29667675 DOI: 10.1039/c8dt00822a] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
This perspective reviews our recent efforts towards the self-assembly of polynuclear clusters with ditopic and tritopic multidentate ligands HL1 (2-phenyl-4,5-bis{6-(3,5-dimethylpyrazol-1-yl)pyrid-2-yl}-1H-imidazole) and H2L2 (2,6-bis-[5-(2-pyridinyl)-1H-pyrazole-3-yl]pyridine), both of which are planar and rigid molecules. HL1 was found to be an excellent support for tetranuclear [Fe4] complexes, [FeII4(L1)4](BF4)4 ([FeII4]) and [FeIII2FeII2(L1)4](BF4)6 ([FeIII2FeII2]). The homovalent system was found to exhibit multistep spin crossover (SCO), while the mixed-valence [FeIII2FeII2] complex shows wavelength-dependent tuneable light-induced excited spin state trapping (LIESST). For H2L2, a variety of polynuclear complexes were obtained through complexation with different transition metal ions, allowing the isolation of rings, grids, and helix structures. The rigidity of the ligand, difference in its coordination sites, and affinity for different metal ions dictates its coordination behaviour. In this paper, we summarise these ligand pre-programmed self-assembled clusters and their diverse physical properties.
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Affiliation(s)
- Takuya Shiga
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai 1-1-1, Tsukuba 305-8571, Japan.
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41
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Kamebuchi H, Sugaya T, Shiga R, Murakami H, Tadokoro M. Self-organized Tetranickel(II) Molecular Square with Imidazolinyl-imidazole Bridging Ligand. CHEM LETT 2018. [DOI: 10.1246/cl.180218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Hajime Kamebuchi
- Department of Chemistry, Faculty of Science Division I, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Tomoaki Sugaya
- Education Center, Faculty of Engineering, Chiba Institute of Technology, 2-1-1 Shibazono, Narashino, Chiba 275-0023, Japan
| | - Ryosuke Shiga
- Department of Chemistry, Faculty of Science Division I, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Hiroki Murakami
- Department of Chemistry, Faculty of Science Division I, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Makoto Tadokoro
- Department of Chemistry, Faculty of Science Division I, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
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42
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[2 × 2] Molecular Grids of Ni(II) and Zn(II) with Redox-Active 1,4-Pyrazine-Bis(thiosemicarbazone) Ligands. INORGANICS 2018. [DOI: 10.3390/inorganics6020051] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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43
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Abstract
Abstract
Acetylacetone (2,4-pentanedione) derivatives with N donor substituents represent ditopic ligands with coordination sites of distinctly different Pearson hardness. Deprotonation of the acetylacetone (Hacac) moiety leads to O,O′ chelating monoanionic (acac) ligands suitable for coordination to hard cations. The softer N donor site(s) preferably act as nucleophiles towards softer partners. When the organic molecules are employed as linkers and coordinate via either site, they are often selective and allow to synthesize well-ordered heterometallic solids. This review addresses the derivatives of 17 pentanediones with nitrile, pyridyl and pyrazolyl moieties as N donor substituents, with an emphasis on structurally characterized compounds. Depending on the N donor substituents and the cations, O,O′ or N coordination will dominate. The nitrile-substituted compounds essentially behave as acetylacetones; they may easily O,O′ coordinate to a wide range of cations whereas N coordination is limited to AgI, CuI or, in the case of less soft cations, to longer and presumably weaker contacts, e.g. to the more distant sites in Jahn–Teller distorted CuII. In contrast, pyridyl-substituted pentanediones act as N donor ligands, regardless whether their (H)acac site is chelating a cation or not. The still scarcely explored pyrazolyl derivative shows the most complex coordination pattern: it may be deprotonated both at the acetylacetone and the pyrazol site, the latter affording N,N′ bridging ligands. In addition to N donor nucleophilicity, the distance between the alternative coordination sites and their mutual orientation are relevant for crystal engineering applications.
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Affiliation(s)
- Marius Kremer
- Institut für Anorganische Chemie, RWTH Aachen University , Landoltweg 1 , 52074 Aachen , Germany
| | - Ulli Englert
- Institut für Anorganische Chemie, RWTH Aachen University , Landoltweg 1 , 52074 Aachen , Germany
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44
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Mahmoudi G, Zangrando E, Mitoraj MP, Gurbanov AV, Zubkov FI, Moosavifar M, Konyaeva IA, Kirillov AM, Safin DA. Extended lead(ii) architectures engineered via tetrel bonding interactions. NEW J CHEM 2018. [DOI: 10.1039/c8nj00525g] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The cooperative action of multiple non-covalent interactions allowed for the assembly of a new series of PbII coordination compounds.
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Affiliation(s)
- Ghodrat Mahmoudi
- Department of Chemistry
- Faculty of Science
- University of Maragheh
- Maragheh
- Iran
| | - Ennio Zangrando
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- 34127 Trieste
- Italy
| | - Mariusz P. Mitoraj
- Department of Theoretical Chemistry
- Faculty of Chemistry
- Jagiellonian University
- 30-060 Cracow
- Poland
| | - Atash V. Gurbanov
- Department of Chemistry
- Baku State University
- Baku
- Azerbaijan
- Centro de Química Estrutural
| | - Fedor I. Zubkov
- Organic Chemistry Department
- Faculty of Science
- Peoples’ Friendship University of Russia (RUDN University)
- Moscow
- Russian Federation
| | - Maryam Moosavifar
- Department of Chemistry
- Faculty of Science
- University of Maragheh
- Maragheh
- Iran
| | - Irina A. Konyaeva
- Limited Liability Company “NIOST”
- Kuzovlevski trakt 2
- Tomsk
- Russian Federation
- Department of Technology of Organic Substances and Polymer Materials
| | - Alexander M. Kirillov
- Centro de Química Estrutural
- Complexo I
- Instituto Superior Técnico
- Universidade de Lisboa
- Lisbon
| | - Damir A. Safin
- Institute of Chemistry
- University of Tyumen
- 625003 Tyumen
- Russian Federation
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45
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46
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Pringouri K, Anwar MU, Mansour L, Doupnik N, Beldjoudi Y, Gavey EL, Pilkington M, Rawson JM. A novel bis-1,2,4-benzothiadiazine pincer ligand: synthesis, characterization and first row transition metal complexes. Dalton Trans 2018; 47:15725-15736. [DOI: 10.1039/c8dt03346c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The synthesis and coordination chemistry of ligand LH2 to first row transition metals is described in which it acts as a tridentate N,N′,N′′-donor.
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Affiliation(s)
| | - Muhammad U. Anwar
- Natural and Medical Sciences Research Center
- University of Nizwa
- Nizwa
- Sultanate of Oman
| | - Liz Mansour
- Department of Chemistry and Biochemistry
- University of Windsor
- Windsor
- Canada
| | - Nathan Doupnik
- Department of Chemistry and Biochemistry
- University of Windsor
- Windsor
- Canada
| | - Yassine Beldjoudi
- Department of Chemistry and Biochemistry
- University of Windsor
- Windsor
- Canada
| | - Emma L. Gavey
- Department of Chemistry
- Brock University
- St Catharines
- Canada
| | | | - Jeremy M. Rawson
- Department of Chemistry and Biochemistry
- University of Windsor
- Windsor
- Canada
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47
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Grid-type complexes of M2+ (M = Co, Ni, and Zn) with highly soluble bis(hydrazone)thiopyrimidine-based ligands: Spectroscopy and electrochemical properties. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.05.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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Tong J, Demeshko S, Dechert S, Meyer F. Expanding the Family of Pyrazole‐Bridged Mixed‐Spin and Mixed‐Valence Tetranuclear [2 × 2] Iron Grid Complexes. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700733] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jin Tong
- Institut für Anorganische Chemie Universität Göttingen Tammannstr. 4 37077 Göttingen Germany
| | - Serhiy Demeshko
- Institut für Anorganische Chemie Universität Göttingen Tammannstr. 4 37077 Göttingen Germany
| | - Sebastian Dechert
- Institut für Anorganische Chemie Universität Göttingen Tammannstr. 4 37077 Göttingen Germany
| | - Franc Meyer
- Institut für Anorganische Chemie Universität Göttingen Tammannstr. 4 37077 Göttingen Germany
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49
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Hogue RW, Dhers S, Hellyer RM, Luo J, Hanan GS, Larsen DS, Garden AL, Brooker S. Self-Assembly of Cyclohelicate [M 3 L 3 ] Triangles Over [M 4 L 4 ] Squares, Despite Near-Linear Bis-terdentate L and Octahedral M. Chemistry 2017; 23:14193-14199. [PMID: 28593687 DOI: 10.1002/chem.201702153] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Indexed: 12/24/2022]
Abstract
Self-assembly of 1:1:2 MII (BF4 )2 (M=Zn or Fe), pyrazine-2,5-dicarbaldehyde (1) and 2-(2-aminoethyl)pyridine gave trimetallic triangle architectures rather than the anticipated tetrametallic [2×2] squares. Options for the nontrivial synthesis of 1 are considered, and synthetic details provided for both preferred routes. Rare cyclohelicate triangle architectures are observed for the pair of structurally characterized yellow-brown [Zn3 L3 ](BF4 )6 and dark green [Fe3 L3 ](BF4 )6 complexes of the neutral bis-terdentate Schiff base L. In order to form these pyrazine-edged triangles, the octahedral metal ions-with all 6 N-donors provided by the terdentate binding pockets of two L-are located 0.4-0.5 Å out of the plane of the bridging pyrazines, towards the center of the triangle. Density functional theory calculations confirm that simple particle counting entropic arguments, which predict triangles over squares, are correct here, with the triangles shown to be energetically favored over the corresponding squares. However, importantly, DFT analysis of these and related triangle versus square systems also show that vibrational contributions to entropy dominate and may significantly influence the preferred architecture, such that simple particle counting cannot in general be reliably employed to predict the observed architecture.
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Affiliation(s)
- Ross W Hogue
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, PO Box 56, Dunedin, 9054, New Zealand
| | - Sébastien Dhers
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, PO Box 56, Dunedin, 9054, New Zealand
| | - Ryan M Hellyer
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, PO Box 56, Dunedin, 9054, New Zealand
| | - Jingwei Luo
- Department of Chemistry, University of Victoria, Victoria, Canada.,Département de Chimie, Université de Montréal, Quebec, Canada
| | - Garry S Hanan
- Département de Chimie, Université de Montréal, Quebec, Canada
| | - David S Larsen
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, PO Box 56, Dunedin, 9054, New Zealand
| | - Anna L Garden
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, PO Box 56, Dunedin, 9054, New Zealand
| | - Sally Brooker
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, PO Box 56, Dunedin, 9054, New Zealand
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50
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Yu B, Sun YX, Yang CJ, Guo JQ, Li J. Synthesis and Crystal Structures of an Unexpected Tetranuclear Zinc(II) Complex and a Benzoquinone Compound Derived from ZnII- and CdII-Promoted Reactivity of Schiff Base Ligands. Z Anorg Allg Chem 2017. [DOI: 10.1002/zaac.201700034] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Bin Yu
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; 730070 Lanzhou P. R. China
| | - Yin-Xia Sun
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; 730070 Lanzhou P. R. China
| | - Cheng-Juan Yang
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; 730070 Lanzhou P. R. China
| | - Jian-Qiang Guo
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; 730070 Lanzhou P. R. China
| | - Jing Li
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; 730070 Lanzhou P. R. China
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