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Manohar EM, Dhandapani HN, Roy S, Pełka R, Rams M, Konieczny P, Tothadi S, Kundu S, Dey A, Das S. Tetranuclear Co II4O 4 Cubane Complex: Effective Catalyst Toward Electrochemical Water Oxidation. Inorg Chem 2024; 63:4883-4897. [PMID: 38494956 DOI: 10.1021/acs.inorgchem.3c03956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
The reaction of Co(OAc)2·6H2O with 2,2'-[{(1E,1'E)-pyridine-2,6-diyl-bis(methaneylylidene)bis(azaneylylidene)}diphenol](LH2) a multisite coordination ligand and Et3N in a 1:2:3 stoichiometric ratio forms a tetranuclear complex Co4(L)2(μ-η1:η1-OAc)2(η2-OAc)2]· 1.5 CH3OH· 1.5 CHCl3 (1). Based on X-ray diffraction investigations, complex 1 comprises a distorted Co4O4 cubane core consisting of two completely deprotonated ligands [L]2- and four acetate ligands. Two distinct types of CoII centers exist in the complex, where the Co(2) center has a distorted octahedral geometry; alternatively, Co(1) has a distorted pentagonal-bipyramidal geometry. Analysis of magnetic data in 1 shows predominant antiferromagnetic coupling (J = -2.1 cm-1), while the magnetic anisotropy is the easy-plane type (D1 = 8.8, D2 = 0.76 cm-1). Furthermore, complex 1 demonstrates an electrochemical oxygen evolution reaction (OER) with an overpotential of 325 mV and Tafel slope of 85 mV dec-1, required to attain a current density of 10 mA cm-2 and moderate stability under alkaline conditions (pH = 14). Electrochemical impedance spectroscopy studies reveal that compound 1 has a charge transfer resistance (Rct) of 2.927 Ω, which is comparatively lower than standard Co3O4 (5.242 Ω), indicating rapid charge transfer kinetics between electrode and electrolyte solution that enhances higher catalytic activity toward OER kinetics.
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Affiliation(s)
- Ezhava Manu Manohar
- Department of Basic Sciences, Chemistry Discipline, Institute of Infrastructure, Technology, Research, and Management, Near Khokhra Circle, Maninagar East, Ahmedabad, Gujarat 380026, India
| | - Hariharan N Dhandapani
- Electrochemical Process Engineering (EPE) Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi, Tamil Nadu 630003, India
| | - Soumalya Roy
- Department of Basic Sciences, Chemistry Discipline, Institute of Infrastructure, Technology, Research, and Management, Near Khokhra Circle, Maninagar East, Ahmedabad, Gujarat 380026, India
| | - Robert Pełka
- Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, Krakow PL-31342, Poland
| | - Michał Rams
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, Kraków 30348, Poland
| | - Piotr Konieczny
- Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, Krakow PL-31342, Poland
| | - Srinu Tothadi
- Analytical and Environmental Sciences Division and Centralized Instrumentation Facility, CSIR-Central Salt and Marine Chemicals Research Institute, Gijubhai Badheka Marg, Bhavnagar 364002, India
| | - Subrata Kundu
- Electrochemical Process Engineering (EPE) Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi, Tamil Nadu 630003, India
| | - Atanu Dey
- Department of Chemistry, Gandhi Institute of Technology and Management (GITAM), NH 207, Nagadenehalli, Doddaballapur Taluk, Bengaluru, Karnataka 561203, India
| | - Sourav Das
- Department of Basic Sciences, Chemistry Discipline, Institute of Infrastructure, Technology, Research, and Management, Near Khokhra Circle, Maninagar East, Ahmedabad, Gujarat 380026, India
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[M II(H 2dapsc)]-[Cr(CN) 6] (M = Mn, Co) Chain and Trimer Complexes: Synthesis, Crystal Structure, Non-Covalent Interactions and Magnetic Properties. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238518. [PMID: 36500611 PMCID: PMC9737345 DOI: 10.3390/molecules27238518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 11/29/2022] [Accepted: 11/30/2022] [Indexed: 12/11/2022]
Abstract
Four new heterometallic complexes combining [MII(H2dapsc)]2+ cations with the chelating H2dapsc {2,6-diacetylpyridine-bis(semicarbazone)} Schiff base ligand and [Cr(CN)6]3- anion were synthesized: {[MII(H2dapsc)]CrIII(CN)6K(H2O)2.5(EtOH)0.5}n·1.2n(H2O), M = Mn (1) and Co (2), {[Mn(H2dapsc)]2Cr(CN)6(H2O)2}Cl·H2O (3) and {[Co(H2dapsc)]2Cr(CN)6(H2O)2}Cl·2EtOH·3H2O (4). In all the compounds, M(II) centers are seven-coordinated by N3O2 atoms of H2dapsc in the equatorial plane and N or O atoms of two apical -CN/water ligands. Crystals 1 and 2 are isostructural and contain infinite negatively charged chains of alternating [MII(H2dapsc)]2+ and [CrIII(CN)6]3- units linked by CN-bridges. Compounds 3 and 4 consist of centrosymmetric positively charged trimers in which two [MII(H2dapsc)]2+ cations are bound through one [CrIII(CN)6]3- anion. All structures are regulated by π-stacking of coplanar H2dapsc moieties as well as by an extensive net of hydrogen bonding. Adjacent chains in 1 and 2 interact also by coordination bonds via a pair of K+ ions. The compounds containing MnII (1, 3) and CoII (2, 4) show a significant difference in magnetic properties. The ac magnetic measurements revealed that complexes 1 and 3 behave as a spin glass and a field-induced single-molecule magnet, respectively, while 2 and 4 do not exhibit slow magnetic relaxation in zero and non-zero dc fields. The relationship between magnetic properties and non-covalent interactions in the structures 1-4 was traced.
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Sutter JP, Béreau V, Jubault V, Bretosh K, Pichon C, Duhayon C. Magnetic anisotropy of transition metal and lanthanide ions in pentagonal bipyramidal geometry. Chem Soc Rev 2022; 51:3280-3313. [PMID: 35353106 DOI: 10.1039/d2cs00028h] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The magnetic anisotropy associated with a pentagonal bipyramidal (PBP) coordination sphere is examined on the basis of experimental and theoretical investigations. The origin and the characteristics of this anisotropy are discussed in relation to the electronic configuration of the metal ions. The effects of crystal field, structural distortion, and a second-coordination sphere on the observed anisotropies for transition meal and lanthanide ions are outlined. For the Ln derivatives, we focus on compounds showing SMM-like behavior (i.e. slow relaxation of their magnetization) in order to highlight the essential chemical and structural parameters for achieving strong axial anisotropy. The use of PBP complexes to impart controlled magnetic anisotropy in polynuclear species such as SMMs or SCMs is also addressed. This review of the magnetic anisotropies associated with a pentagonal bipyramidal coordination sphere for transition metal and lanthanide ions is intended to highlight some general trends that can guide chemists towards designing a compound with specific properties.
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Affiliation(s)
- Jean-Pascal Sutter
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS), Université de Toulouse, CNRS, Toulouse, France.
| | - Virginie Béreau
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS), Université de Toulouse, CNRS, Toulouse, France. .,Université de Toulouse, Institut Universitaire de Technologie Paul Sabatier-Département de Chimie, Av. Georges Pompidou, F-81104 Castres, France
| | - Valentin Jubault
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS), Université de Toulouse, CNRS, Toulouse, France.
| | - Kateryna Bretosh
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS), Université de Toulouse, CNRS, Toulouse, France.
| | - Céline Pichon
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS), Université de Toulouse, CNRS, Toulouse, France.
| | - Carine Duhayon
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS), Université de Toulouse, CNRS, Toulouse, France.
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Cyano-Bridged Dy(III) and Ho(III) Complexes with Square-Wave Structure of the Chains. INORGANICS 2022. [DOI: 10.3390/inorganics10040041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/10/2022] Open
Abstract
Four new cyano-bridged DyIII-CrIII, DyIII-FeIII, HoIII-CrIII and HoIII-FeIII bimetallic coordination polymers were synthesized by the reaction of [Ln(H2dapsc)(H2O)4](NO3)3 (Ln = Dy, Ho); H2dapsc = 2,6-diacetylpyridinebis(semicarbazone)) with K3[M(CN)6] (M = Cr, Fe) in H2O, resulting in the substitution of two water molecules in the coordination sphere of rare earth by paramagnetic tricharged hexacyanides of Fe and Cr. The complexes are isostructural and consist of alternating [Ln(H2dapsc)(H2O)2]3+ and [M(CN)6]3− units linked by bridges of two cis-cyano ligands of the anion to form square-wave chains. The ac magnetic measurements revealed that the DyCr and DyFe complexes are field-induced single molecule magnets, while their Ho analogs do not exhibit slow magnetic relaxation.
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Comba P, Rajaraman G, Sarkar A, Velmurugan G. What controls the magnetic anisotropy in heptacoordinate high-spin cobalt(II) complexes? A theoretical perspective. Dalton Trans 2022; 51:5175-5183. [PMID: 35274660 DOI: 10.1039/d1dt03903b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The magnetic anisotropy of sixteen seven-coordinate high-spin CoII complexes with O, N, Cl and I donors was investigated with state-of-the-art ab initio CASSCF/NEVPT2 calculations and compared with experimental data. Based on the nature of the equatorial and axial ligands, which were found to tune the zero-field splitting, the complexes were classified into four groups. The experimental zero-field splitting parameters D which, for the various structures are in a range of +30 to +60 cm-1, as well as the g and E values are well reproduced. The investigation of the electronic structure shows that in these pentagonal bipyramidal complexes the donors and symmetry in the equatorial plane play an important role in the values of the axial zero-field splitting parameter D, and breaking of the horizontal plane of symmetry was found to enhance the magnitude of the D value. Although negative values of D are a desired condition for SIMs, many CoII based SIMs with positive zero-field splitting are fundamentally important to understand the nature of magnetic anisotropy, and seven coordinate CoII complexes with a large overall crystal field splitting might provide a way forward in this class of molecules.
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Affiliation(s)
- Peter Comba
- Heidelberg University, Institute of Inorganic Chemistry and Interdisciplinary Center for Scientific Computing, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India.
| | - Arup Sarkar
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India.
| | - Gunasekaran Velmurugan
- Heidelberg University, Institute of Inorganic Chemistry and Interdisciplinary Center for Scientific Computing, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
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Qin Y, Wu Y, Luo S, Xi J, Guo Y, Ding Y, Zhang J, Liu X. Modulation of the magnetic dynamics of pentagonal-bipyramidal Co( ii) complexes by fine-tuning the coordination microenvironment. Dalton Trans 2022; 51:17089-17096. [DOI: 10.1039/d2dt02345h] [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
Dynamic magnetic behaviours of a series of Co(ii) SIMs with pentagonal-bipyramidal geometry have been modulated by an alteration of the ligand field effect.
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Affiliation(s)
- Yuanyuan Qin
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
| | - Yuewei Wu
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
| | - Shuchang Luo
- College of Chemical Engineering, Guizhou University of Engineering Science, Bijie 551700, China
| | - Jing Xi
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
| | - Yan Guo
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
| | - Yi Ding
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
| | - Jun Zhang
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
| | - Xiangyu Liu
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
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Pichon C, Suaud N, Jubault V, Duhayon C, Guihéry N, Sutter JP. Trinuclear Cyanido-Bridged [Cr 2 Fe] Complexes: To Be or not to Be a Single-Molecule Magnet, a Matter of Straightness. Chemistry 2021; 27:15484-15495. [PMID: 34523758 DOI: 10.1002/chem.202102571] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Indexed: 11/08/2022]
Abstract
Trinuclear systems of formula [{Cr(LN3O2Ph )(CN)2 }2 M(H2 LN3O2R )] (M=MnII and FeII , LN3O2R stands for pentadentate ligands) were prepared in order to assess the influence of the bending of the apical M-N≡C linkages on the magnetic anisotropy of the FeII derivatives and in turn on their Single-Molecule Magnet (SMM) behaviors. The cyanido-bridged [Cr2 M] derivatives were obtained by assembling trans-dicyanido CrIII complex [Cr(LN3O2Ph )(CN)2 ]- and divalent pentagonal bipyramid complexes [MII (H2 LN3O2R )]2+ with various R substituents (R=NH2 , cyclohexyl, S,S-mandelic) imparting different steric demand to the central moiety of the complexes. A comparative examination of the structural and magnetic properties showed an obvious effect of the deviation from straightness of the M-N≡C alignment on the slow relaxation of the magnetization exhibited by the [Cr2 Fe] complexes. Theoretical calculations have highlighted important effects of the bending of the apical C-N-Fe linkages on both the magnetic anisotropy of the FeII center and the exchange interactions with the CrIII units.
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Affiliation(s)
- Céline Pichon
- Laboratoire de Chimie de Coordination du CNRS (LCC), Université de Toulouse, CNRS, 31077, Toulouse, France
| | - Nicolas Suaud
- Laboratoire de Chimie et Physique quantiques (LCPQ), Université de Toulouse, CNRS, 118 route de Narbonne, 31062, Toulouse, France
| | - Valentin Jubault
- Laboratoire de Chimie de Coordination du CNRS (LCC), Université de Toulouse, CNRS, 31077, Toulouse, France
| | - Carine Duhayon
- Laboratoire de Chimie de Coordination du CNRS (LCC), Université de Toulouse, CNRS, 31077, Toulouse, France
| | - Nathalie Guihéry
- Laboratoire de Chimie et Physique quantiques (LCPQ), Université de Toulouse, CNRS, 118 route de Narbonne, 31062, Toulouse, France
| | - Jean-Pascal Sutter
- Laboratoire de Chimie de Coordination du CNRS (LCC), Université de Toulouse, CNRS, 31077, Toulouse, France
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Peters LCJM, Engelkamp H, Zeitler U, Christianen PCM, Tinnemans P, Maan J, Rowan AE. Synthesis and Magnetic Properties of Two‐Step‐Coordination Schiff Base Clusters. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100298] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Laurens C. J. M. Peters
- High Field Magnet Laboratory (HFML – EMFL) Radboud University Toernooiveld 7 6525 ED Nijmegen The Netherlands
- Institute for Molecules and Materials Radboud University Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
| | - Hans Engelkamp
- High Field Magnet Laboratory (HFML – EMFL) Radboud University Toernooiveld 7 6525 ED Nijmegen The Netherlands
- Institute for Molecules and Materials Radboud University Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
| | - Uli Zeitler
- High Field Magnet Laboratory (HFML – EMFL) Radboud University Toernooiveld 7 6525 ED Nijmegen The Netherlands
- Institute for Molecules and Materials Radboud University Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
| | - Peter C. M. Christianen
- High Field Magnet Laboratory (HFML – EMFL) Radboud University Toernooiveld 7 6525 ED Nijmegen The Netherlands
- Institute for Molecules and Materials Radboud University Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
| | - Paul Tinnemans
- Institute for Molecules and Materials Radboud University Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
| | - Jan‐Kees Maan
- High Field Magnet Laboratory (HFML – EMFL) Radboud University Toernooiveld 7 6525 ED Nijmegen The Netherlands
- Institute for Molecules and Materials Radboud University Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
| | - Alan E. Rowan
- Institute for Molecules and Materials Radboud University Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
- Australian Institute for Bioengineering and Nanotechnology (AIBN) The University of Queensland Brisbane Australia
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Bazhenova T, Zorina L, Simonov S, Manakin Y, Kornev A, Lyssenko K, Mironov V, Gilmutdinov I, Yagubskii E. A novel family of hepta-coordinated Cr(III) complexes with a planar pentadentate N3O2 Schiff base ligand: synthesis, structure and magnetism. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120358] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Reczyński M, Akaki M, Fukuda T, Sawada Y, Nishii K, Hagiwara M, Nitek W, Sieklucka B, Nowicka B. Hepta-coordinated Ni(II) assemblies - structure and magnetic studies. Dalton Trans 2021; 50:5251-5261. [PMID: 33881078 DOI: 10.1039/d1dt00479d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two mononuclear complexes [Ni(dapsc)(H2O)2]Cl(NO3)·H2O (1) and [Ni(dapsc)(NCS)2] (2), and a bimetallic CN-bridged trinuclear molecule [NiII(dapsc)(H2O)]2[WIV(CN)8]·11H2O (3) (dapsc = 2,6-diacetylpyridine-bis(semicarbazone)) were synthesised and characterised in terms of structure and magnetic properties. All three compounds contain Ni(ii) ions in a pentagonal bipyramid coordination geometry afforded by the equatorial pentadentate ligand (dapsc) and two O- or N-donating axial ligands. The compounds differ in the relative arrangement of the complexes, intermolecular interactions and distortion from the ideal coordination geometry. The high-field EPR and magnetometric studies show large anisotropy of the Ni(ii) centres with the D parameters in the range of -10.5 to -21.2 cm-1 and negligible antiferromagnetic interactions. The easy-axis magnetic anisotropies of 1-3 were reproduced by ab initio CASSCF/NEVPT2 calculations. The ground states consist mainly of the |MS = |±1 states, which is consistent with the fact that no out-of-phase signal can be detected in the AC magnetic susceptibility measurements.
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Affiliation(s)
- Mateusz Reczyński
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland.
| | - Mitsuru Akaki
- Center for Advanced High Magnetic Field Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Takamitsu Fukuda
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Yuya Sawada
- Center for Advanced High Magnetic Field Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Kengo Nishii
- Center for Advanced High Magnetic Field Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Masayuki Hagiwara
- Center for Advanced High Magnetic Field Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Wojciech Nitek
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland.
| | - Barbara Sieklucka
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland.
| | - Beata Nowicka
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland.
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Choudhury A, Pichon C, Sutter JP, Pamu D, Sarma B, Mudoi PP, Gogoi N. Accessing water processable cyanido bridged chiral heterobimetallic Co(ii)-Fe(iii) one dimensional network. Chem Commun (Camb) 2021; 57:207-210. [PMID: 33300509 DOI: 10.1039/d0cc05356b] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A water processable cyanido bridged extended chiral heterobimetallic Co(ii)-Fe(iii) network is assembled. The unusual water processability of the coordination polymer originates from dangling hydrophilic substituents. The present approach offers a simple route to impart solution processability to cyanido bridged molecular magnetic materials.
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Affiliation(s)
- Anup Choudhury
- Department of Chemical Sciences, Tezpur University, Napaam-784028, Sonitpur, Assam, India.
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Sasnovskaya VD, Zorina LV, Simonov SV, Talantsev AD, Mikhailov AA, Kostin GA, Yagubskii EB. Cyano-bridged polynuclear coordination compounds derived from paramagnetic [Mn(H 2daptsc)] 2+ and photochromic [Fe(CN) 5NO] 2− building blocks. CrystEngComm 2021. [DOI: 10.1039/d0ce01863e] [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 complexes with H2daptsc ligand were first used as building blocks to create polynuclear multifunctional materials.
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Stojičkov M, Sturm S, Čobeljić B, Pevec A, Jevtović M, Scheitler A, Radanović D, Senft L, Turel I, Andjelković K, Miehlich M, Meyer K, Ivanović‐Burmazović I. Cobalt(II), Zinc(II), Iron(III), and Copper(II) Complexes Bearing Positively Charged Quaternary Ammonium Functionalities: Synthesis, Characterization, Electrochemical Behavior, and SOD Activity. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000415] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Marko Stojičkov
- Faculty of Chemistry University of Belgrade Studentski trg 12‐16 11000 Belgrade Serbia
| | - Sabrina Sturm
- Department of Chemistry and Pharmacy Friedrich‐Alexander University Erlangen‐Nürnberg Egerlandstr. 1 91058 Erlangen Germany
| | - Božidar Čobeljić
- Faculty of Chemistry University of Belgrade Studentski trg 12‐16 11000 Belgrade Serbia
| | - Andrej Pevec
- Faculty of Chemistry and Chemical Technology University of Ljubljana Večna pot 113 1000 Ljubljana Slovenia
| | - Mima Jevtović
- Faculty of Chemistry University of Belgrade Studentski trg 12‐16 11000 Belgrade Serbia
| | - Andreas Scheitler
- Department of Chemistry and Pharmacy Friedrich‐Alexander University Erlangen‐Nürnberg Egerlandstr. 1 91058 Erlangen Germany
| | - Dušanka Radanović
- Institute of Chemistry Technology and Metallurgy University of Belgrade Njegoševa 12, P.O. Box 815 11000 Belgrade Serbia
| | - Laura Senft
- Department of Chemistry and Pharmacy Friedrich‐Alexander University Erlangen‐Nürnberg Egerlandstr. 1 91058 Erlangen Germany
| | - Iztok Turel
- Faculty of Chemistry and Chemical Technology University of Ljubljana Večna pot 113 1000 Ljubljana Slovenia
| | - Katarina Andjelković
- Faculty of Chemistry University of Belgrade Studentski trg 12‐16 11000 Belgrade Serbia
| | - Matthias Miehlich
- Department of Chemistry and Pharmacy Friedrich‐Alexander University Erlangen‐Nürnberg Egerlandstr. 1 91058 Erlangen Germany
| | - Karsten Meyer
- Department of Chemistry and Pharmacy Friedrich‐Alexander University Erlangen‐Nürnberg Egerlandstr. 1 91058 Erlangen Germany
| | - Ivana Ivanović‐Burmazović
- Department of Chemistry and Pharmacy Friedrich‐Alexander University Erlangen‐Nürnberg Egerlandstr. 1 91058 Erlangen Germany
- Department Chemie Ludwigs‐Maximilians‐Universität Butenandtstraße 5‐13 81377 München Germany
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Bretosh K, Béreau V, Duhayon C, Pichon C, Sutter JP. A ferromagnetic Ni( ii)–Cr( iii) single-chain magnet based on pentagonal bipyramidal building units. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01489f] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first example of a ferromagnetic Ni(ii)–Cr(iii) single-chain magnet fashioned using pentagonal bipyramidal Ni(ii) complexes with Ising-type anisotropy.
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Affiliation(s)
- Kateryna Bretosh
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS)
- Université de Toulouse
- CNRS
- Toulouse
- France
| | - Virginie Béreau
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS)
- Université de Toulouse
- CNRS
- Toulouse
- France
| | - Carine Duhayon
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS)
- Université de Toulouse
- CNRS
- Toulouse
- France
| | - Céline Pichon
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS)
- Université de Toulouse
- CNRS
- Toulouse
- France
| | - Jean-Pascal Sutter
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS)
- Université de Toulouse
- CNRS
- Toulouse
- France
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15
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Zorina LV, Simonov SV, Sasnovskaya VD, Talantsev AD, Morgunov RB, Mironov VS, Yagubskii EB. Slow Magnetic Relaxation, Antiferromagnetic Ordering, and Metamagnetism in Mn II (H 2 dapsc)-Fe III (CN) 6 Chain Complex with Highly Anisotropic Fe-CN-Mn Spin Coupling. Chemistry 2019; 25:14583-14597. [PMID: 31361924 DOI: 10.1002/chem.201902551] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 07/29/2019] [Indexed: 11/07/2022]
Abstract
Reactions of [Mn(H2 dapsc)Cl2 ]⋅H2 O (dapsc=2,6- diacetylpyridine bis(semicarbazone)) with K3 [Fe(CN)6 ] and (PPh4 )3 [Fe(CN)6 ] lead to the formation of the chain polymeric complex {[Mn(H2 dapsc)][Fe(CN)6 ][K(H2 O)3.5 ]}n ⋅1.5n H2 O (1) and the discrete pentanuclear complex {[Mn(H2 dapsc)]3 [Fe(CN)6 ]2 (H2 O)2 }⋅4 CH3 OH⋅3.4 H2 O (2), respectively. In the crystal structure of 1 the high-spin [MnII (H2 dapsc)]2+ cations and low-spin hexacyanoferrate(III) anions are assembled into alternating heterometallic cyano-bridged chains. The K+ ions are located between the chains and are coordinated by oxygen atoms of the H2 dapsc ligand and water molecules. The magnetic structure of 1 is built from ferrimagnetic chains, which are antiferromagnetically coupled. The complex exhibits metamagnetism and frequency-dependent ac magnetic susceptibility, indicating single-chain magnetic behavior with a Mydosh-parameter φ=0.12 and an effective energy barrier (Ueff /kB ) of 36.0 K with τ0 =2.34×10-11 s for the spin relaxation. Detailed theoretical analysis showed highly anisotropic intra-chain spin coupling between [FeIII (CN)6 ]3- and [MnII (H2 dapsc)]2+ units resulting from orbital degeneracy and unquenched orbital momentum of [FeIII (CN)6 ]3- complexes. The origin of the metamagnetic transition is discussed in terms of strong magnetic anisotropy and weak AF interchain spin coupling.
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Affiliation(s)
- Leokadiya V Zorina
- Institute of Solid State Physics, Russian Academy of Sciences, Academician Ossipyan Str. 2, Chernogolovka MD, Russia
| | - Sergey V Simonov
- Institute of Solid State Physics, Russian Academy of Sciences, Academician Ossipyan Str. 2, Chernogolovka MD, Russia
| | - Valentina D Sasnovskaya
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Semenov's av. 1, Chernogolovka, MD, Russia
| | - Artem D Talantsev
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Semenov's av. 1, Chernogolovka, MD, Russia
| | - Roman B Morgunov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Semenov's av. 1, Chernogolovka, MD, Russia
| | - Vladimir S Mironov
- Shubnikov Institute of Crystallography of Federal Scientific Research, Centre "Crystallography and Photonics", Russian Academy of Sciences, Leninskii av. 59, Moscow, Russia
| | - Eduard B Yagubskii
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Semenov's av. 1, Chernogolovka, MD, Russia
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16
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A Series of Field-Induced Single-Ion Magnets Based on the Seven-Coordinate Co(II) Complexes with the Pentadentate (N3O2) H2dapsc Ligand. MAGNETOCHEMISTRY 2019. [DOI: 10.3390/magnetochemistry5040058] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A series of five new mononuclear pentagonal bipyramidal Co(II) complexes with the equatorial 2,6-diacetylpyridine bis(semicarbazone) ligand (H2dapsc) and various axial pseudohalide ligands (SCN, SeCN, N(CN)2, C(CN)3, and N3) was prepared and structurally characterizated: [Co(H2dapsc)(SCN)2]∙0.5C2H5OH (1), [Co(H2dapsc)(SeCN)2]∙0.5C2H5OH (2), [Co(H2dapsc)(N(CN)2)2]∙2H2O (3), [Co(H2dapsc)(C(CN)3)(H2O)](NO3)∙1.16H2O (4), and {[Co(H2dapsc)(H2O)(N3)][Co(H2dapsc)(N3)2]}N3∙4H2O (5). The combined analyses of the experimental DС and AC magnetic data of the complexes (1–5) and two other earlier described those of this family [Co(H2dapsc)(H2O)2)](NO3)2∙2H2O (6) and [Co(H2dapsc)(Cl)(H2O)]Cl∙2H2O (7), their theoretical description and the ab initio CASSCF/NEVPT2 calculations reveal large easy-plane magnetic anisotropies for all complexes (D = + 35 − 40 cm‒1). All complexes under consideration demonstrate slow magnetic relaxation with dominant Raman and direct spin–phonon processes at static magnetic field and so they belong to the class of field-induced single-ion magnets (SIMs).
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17
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Deng YF, Yao B, Zhan PZ, Gan D, Zhang YZ, Dunbar KR. Synthesis and magnetic studies of pentagonal bipyramidal metal complexes of Fe, Co and Ni. Dalton Trans 2019; 48:3243-3248. [PMID: 30775732 DOI: 10.1039/c8dt05074k] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Three mononuclear metal complexes [MII(L-N3O2)(MeCN)2][BPh4]2 (M = Fe, 1; Co, 2; Ni, 3) were isolated and structurally characterized. Magnetic studies revealed uniaxial magnetic anisotropy for 1 (D = -17.1 cm-1) and 3 (D = -14.3 cm-1) and easy-plane magnetic anisotropy for 2 (D = +36.9 cm-1). Slow magnetic relaxation was observed for complexes 1 and 2 under an applied magnetic field, both of which are dominated by a Raman process.
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Affiliation(s)
- Yi-Fei Deng
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, P. R. China.
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18
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Shen FX, Li HQ, Miao H, Shao D, Wei XQ, Shi L, Zhang YQ, Wang XY. Heterometallic M IILn III (M = Co/Zn; Ln = Dy/Y) Complexes with Pentagonal Bipyramidal 3d Centers: Syntheses, Structures, and Magnetic Properties. Inorg Chem 2018; 57:15526-15536. [PMID: 30500167 DOI: 10.1021/acs.inorgchem.8b02875] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We herein reported the syntheses, structures, and magnetic properties of three dinuclear heterometallic MIILnIII complexes, namely, [MIILnIII(H2L)(CH3OH)2(NO3)2](NO3)·S (M = Co, Ln = Dy, S = MeOH (1CoDy); M = Zn, Ln = Dy, S = MeOH (2ZnDy); M = Co, Ln = Y, S = MeNO2 (3CoY), H4L = 2,6-diacetylpyridine bis[2-(semicarbazono) propionylhydrazone]. Synthesized from the predesigned multidentate ligand H4L, which has two different coordination pockets (smaller N3O2 and larger N2O4 pockets) suitable for either a 3d or a 4f metal center, all these complexes have very similar structures, where the MII centers possess a pentagonal bipyramidal (PBP) geometry and the LnIII sites have a tetradecahedron geometry. Magnetic measurements on these compounds revealed the existence of weak ferromagnetic coupling between the Co2+ and Dy3+ centers and the field-induced slow magnetic relaxation of all three complexes. Furthermore, theoretical calculation on all these complexes indicates that although the change of the diamagnetic Zn2+ ion to the paramagnetic Co2+ ion only slightly modifies the local magnetic anisotropy of the Dy3+ ion, the weak Co-Dy magnetic interaction decreases the energy barrier. These compounds are the first systematic results of a heterometallic 3d-4f single-molecule magnet containing predesigned PBP 3d metal ions.
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Affiliation(s)
- Fu-Xing Shen
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Hong-Qing Li
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Hao Miao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Dong Shao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Xiao-Qin Wei
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Le Shi
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology , Nanjing Normal University , Nanjing 210023 , China
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
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19
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Wang J, Cui HH, Zhang YQ, Chen L, Chen XT. Magnetic anisotropy and slow magnetic relaxation of seven-coordinate cobalt(II)–nitrate complexes. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.07.050] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Sun H, He ML, Zhao W, Zhang LF, Ni ZH. Synthesis, crystal structure and magnetic properties of a cyanide-bridged one-dimensional FeIIICoII metamagnet. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.05.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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21
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Mondal AK, Mondal A, Dey B, Konar S. Influence of the Coordination Environment on Easy-Plane Magnetic Anisotropy of Pentagonal Bipyramidal Cobalt(II) Complexes. Inorg Chem 2018; 57:9999-10008. [DOI: 10.1021/acs.inorgchem.8b01162] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Amit Kumar Mondal
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, 462066 Madhya Pradesh, India
| | - Arpan Mondal
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, 462066 Madhya Pradesh, India
| | - Bijoy Dey
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, 462066 Madhya Pradesh, India
| | - Sanjit Konar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, 462066 Madhya Pradesh, India
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22
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Liu M, Hu J, Wang Y. Synthesis, crystal structure and MMCT of a heterobimetallic cyanide-bridged complex trans-BrRuII(dppe)2(μ-CN)(FeIIIBr3). Polyhedron 2018. [DOI: 10.1016/j.poly.2018.04.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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23
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Kachi-Terajima C, Kimura N. Crystal structures of two isotypic lanthanide(III) complexes: tri-aqua-[2,6-di-acetyl-pyridine bis-(benzoyl-hydrazone)]methano-llanthanide(III) trichloride methanol disolvates ( LnIII = Tb and Dy). Acta Crystallogr E Crystallogr Commun 2018; 74:535-538. [PMID: 29765761 PMCID: PMC5946983 DOI: 10.1107/s2056989018004103] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 03/11/2018] [Indexed: 12/01/2022]
Abstract
The title lanthanide complexes, [Ln(DAPBH2)(CH3OH)(H2O)3]Cl3·2CH3OH [LnIII = Tb and Dy; DAPBH2 = 2,6-di-acetyl-pyridine bis-(benzoyl-hydrazone), C23H21N5O2], are isotypic. The central lanthanide ions are nine-coordinate, being ligated by three N and two O atoms from the penta-dentate DAPBH2 ligand, and four O atoms from the coordinated methanol mol-ecule and three coordinated water mol-ecules. The coordination geometry of the lanthanide ion is a distorted capped square anti-prism. In the crystals, the various components are linked by O-H⋯Cl, N-H⋯Cl and O-H⋯O hydrogen bonds, forming three-dimensional supra-molecular frameworks. Within the frameworks, there are C-H⋯Cl and C-H⋯O hydrogen bonds and offset π-π inter-actions (inter-centroid distance ca 3.81 Å).
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Affiliation(s)
- Chihiro Kachi-Terajima
- Department of Chemistry, Faculty of Science, Toho University, Miyama, Funabashi, Chiba 274-8510, Japan
| | - Norihisa Kimura
- Department of Chemistry, Faculty of Science, Toho University, Miyama, Funabashi, Chiba 274-8510, Japan
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24
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Cyano bridged heterometallic Mn(II)-Fe(III) aggregates: Synthesis, structure and magnetic properties. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.08.048] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Sasnovskaya VD, Kopotkov VA, Kazakova AV, Talantsev AD, Morgunov RB, Simonov SV, Zorina LV, Mironov VS, Yagubskii EB. Slow magnetic relaxation in mononuclear complexes of Tb, Dy, Ho and Er with the pentadentate (N3O2) Schiff-base dapsc ligand. NEW J CHEM 2018. [DOI: 10.1039/c8nj01928b] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
AC measurements revealed field-induced single-ion magnet behavior of Dy and Er Kramers ion complexes. The properties of complexes were rationalized by superposition CF model.
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Affiliation(s)
- Valentina D. Sasnovskaya
- Institute of Problems of Chemical Physics of Russian Academy of Sciences
- Chernogolovka
- Russian Federation
| | - Vyacheslav A. Kopotkov
- Institute of Problems of Chemical Physics of Russian Academy of Sciences
- Chernogolovka
- Russian Federation
| | - Anna V. Kazakova
- Institute of Problems of Chemical Physics of Russian Academy of Sciences
- Chernogolovka
- Russian Federation
| | - Artem D. Talantsev
- Institute of Problems of Chemical Physics of Russian Academy of Sciences
- Chernogolovka
- Russian Federation
| | - Roman B. Morgunov
- Institute of Problems of Chemical Physics of Russian Academy of Sciences
- Chernogolovka
- Russian Federation
| | - Sergey V. Simonov
- Institute of Solid State Physics of Russian Academy of Sciences
- Chernogolovka
- Russian Federation
| | - Leokadiya V. Zorina
- Institute of Solid State Physics of Russian Academy of Sciences
- Chernogolovka
- Russian Federation
| | - Vladimir S. Mironov
- Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences
- Moscow
- Russian Federation
| | - Eduard B. Yagubskii
- Institute of Problems of Chemical Physics of Russian Academy of Sciences
- Chernogolovka
- Russian Federation
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26
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Pichon C, Elrez B, Béreau V, Duhayon C, Sutter JP. From Heptacoordinated CrIII
Complexes with Cyanide or Isothiocyanate Apical Groups to 1D Heterometallic Assemblages with All-Pentagonal-Bipyramid Coordination Geometries. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700845] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Céline Pichon
- LCC (Laboratoire de Chimie de Coordination); CNRS; 205 Route de Narbonne 31077 Toulouse France
- UPS; INPT; Université de Toulouse; 31007 Toulouse France
| | - Bahjat Elrez
- LCC (Laboratoire de Chimie de Coordination); CNRS; 205 Route de Narbonne 31077 Toulouse France
- UPS; INPT; Université de Toulouse; 31007 Toulouse France
| | - Virginie Béreau
- LCC (Laboratoire de Chimie de Coordination); CNRS; 205 Route de Narbonne 31077 Toulouse France
- UPS; INPT; Université de Toulouse; 31007 Toulouse France
| | - Carine Duhayon
- LCC (Laboratoire de Chimie de Coordination); CNRS; 205 Route de Narbonne 31077 Toulouse France
- UPS; INPT; Université de Toulouse; 31007 Toulouse France
| | - Jean-Pascal Sutter
- LCC (Laboratoire de Chimie de Coordination); CNRS; 205 Route de Narbonne 31077 Toulouse France
- UPS; INPT; Université de Toulouse; 31007 Toulouse France
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27
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Sasnovskaya VD, Kopotkov VA, Talantsev AD, Morgunov RB, Yagubskii EB, Simonov SV, Zorina LV, Mironov VS. Synthesis, Structure, and Magnetic Properties of 1D {[Mn III(CN) 6][Mn II(dapsc)]} n Coordination Polymers: Origin of Unconventional Single-Chain Magnet Behavior. Inorg Chem 2017; 56:8926-8943. [PMID: 28686422 DOI: 10.1021/acs.inorgchem.7b00676] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two one-dimensional cyano-bridged coordination polymers, namely, {[MnII(dapsc)][MnIII(CN)6][K(H2O)2.75(MeOH)0.5]}n·0.5n(H2O) (I) and {[MnII(dapsc)][MnIII(CN)6][K(H2O)2(MeOH)2]}n (II), based on alternating high-spin MnII(dapsc) (dapsc = 2,6-diacetylpyridine bis(semicarbazone)) complexes and low-spin orbitally degenerate hexacyanomanganate(III) complexes were synthesized and characterized structurally and magnetically. Static and dynamic magnetic measurements reveal a single-chain magnet (SCM) behavior of I with an energy barrier of Ueff ≈ 40 K. Magnetic properties of I are analyzed in detail in terms of a microscopic theory. It is shown that compound I refers to a peculiar case of SCM that does not fall into the usual Ising and Heisenberg limits due to unconventional character of the MnIII-CN-MnII spin coupling resulting from a nonmagnetic singlet ground state of orbitally degenerate complexes [MnIII(CN)6]3-. The prospects of [MnIII(CN)6]3- complex as magnetically anisotropic molecular building block for engineering molecular magnets are critically analyzed.
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Affiliation(s)
- Valentina D Sasnovskaya
- Institute of Problems of Chemical Physics, Russian Academy of Sciences , Semenov's av., 1, Chernogolovka, MD, Russian Federation
| | - Vyacheslav A Kopotkov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences , Semenov's av., 1, Chernogolovka, MD, Russian Federation
| | - Artem D Talantsev
- Institute of Problems of Chemical Physics, Russian Academy of Sciences , Semenov's av., 1, Chernogolovka, MD, Russian Federation
| | - Roman B Morgunov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences , Semenov's av., 1, Chernogolovka, MD, Russian Federation
| | - Eduard B Yagubskii
- Institute of Problems of Chemical Physics, Russian Academy of Sciences , Semenov's av., 1, Chernogolovka, MD, Russian Federation
| | - Sergey V Simonov
- Institute of Solid State Physics, Russian Academy of Sciences , Academician Ossipyan str., 2, Chernogolovka, MD, Russian Federation
| | - Leokadiya V Zorina
- Institute of Solid State Physics, Russian Academy of Sciences , Academician Ossipyan str., 2, Chernogolovka, MD, Russian Federation
| | - Vladimir S Mironov
- Shubnikov Institute of Crystallography of Federal Scientific Research Centre "Crystallography and Photonics", Russian Academy of Sciences , Leninskii av. 59, Moscow, Russian Federation
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Synthesis, characterization and crystal structures of two pentagonal-bipyramidal Fe(III) complexes with dihydrazone of 2,6-diacetylpyridine and Girard's T reagent. Anticancer properties of various metal complexes of the same ligand. J Inorg Biochem 2017; 174:137-149. [PMID: 28672143 DOI: 10.1016/j.jinorgbio.2017.06.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 05/19/2017] [Accepted: 06/22/2017] [Indexed: 12/11/2022]
Abstract
In this work synthesis, characterization and crystal structures of two isothiocyanato Fe(III) complexes with 2,2'-[2,6-pyridinediylbis(ethylidyne-1-hydrazinyl-2-ylidene)]bis[N,N,N-trimethyl-2-oxoethanaminium] dichloride (H2LCl2) ligand, with composition [FeL(NCS)2]SCN·2H2O and [FeL(NCS)2]2[Fe(H2O)(NCS)5]·4H2O, has been reported. Both iron(III) complexes possess the same pentagonal-bipyramidal complex cation, while the nature of their anions depends on mole ratio of NH4SCN and FeCl3·6H2O used in reaction. Cytotoxic activity of new Fe(III) complexes, as well as of previously synthesized isothiocyanato Co(II), Ni(II), Mn(II), Zn(II) and Cd(II) complexes with the same ligand, was tested against five human cancer cell lines (HeLa, MDA-MB-453, K562, LS174 and A549) and normal cell line MRC-5. The best activity was observed in the case of Fe(III), Co(II) and Cd(II) complexes. The investigation of potential of these complexes to induce HeLa and K562 cell cycle perturbations was also evaluated. Mechanism of cell death mode was elucidated on the basis of morphological changes of HeLa cells as well as identification of target caspases. It was established that DNA damage could be responsible for the activity of Fe(III) and Co(II) complexes. SYNOPSIS Pentagonal-bipyramidal Fe(III) complexes with dihydrazone of 2,6-diacetylpyridine and Girard's T reagent have been synthesized and characterized. Cytotoxic activity of Fe(III) complexes and Co(II), Ni(II), Mn(II), Zn(II) and Cd(II) complexes with the same ligand was tested. The best activity was observed in the case of Fe(III), Co(II) and Cd(II) complexes.
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29
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A cyanide-bridged one-dimensional CrIIICoII metamagnet based on the trans-dicyanidechromate(III) building block. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.03.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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30
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Drahoš B, Herchel R, Trávníček Z. Impact of Halogenido Coligands on Magnetic Anisotropy in Seven-Coordinate Co(II) Complexes. Inorg Chem 2017; 56:5076-5088. [PMID: 28406642 DOI: 10.1021/acs.inorgchem.7b00235] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The structural and magnetic features of a series of mononuclear seven-coordinate CoII complexes with the general formula [Co(L)X2], where L is a 15-membered pyridine-based macrocyclic ligand (3,12,18-triaza-6,9-dioxabicyclo[12.3.1]octadeca-1(18),14,16-triene) and X = Cl- (1), Br- (2), or I- (3), were investigated experimentally and theoretically in order to reveal how the corresponding halogenido coligands in the apical positions of a distorted pentagonal-bipyramidal coordination polyhedron may affect the magnetic properties of the prepared compounds. The thorough analyses of the magnetic data revealed a large easy-plane type of the magnetic anisotropy (D > 0) for all three compounds, with the D-values increasing in the order 35 cm-1 for 3 (I-), 38 cm-1 for 1 (Cl-), and 41 cm-1 for 2 (Br-). Various theoretical methods like the Angular Overlap Model, density functional theory, CASSCF/CASPT2, CASSCF/NEVPT2 were utilized in order to understand the observed trend in magnetic anisotropy. The D-values correlated well with the Mayer bond order (decreasing in order Co-I > Co-Cl > Co-Br), which could be a consequence of two competing factors: (a) the ligand field splitting and (b) the covalence of the Co-X bond. All the complexes also behave as field-induced single-molecule magnets with the spin reversal barrier Ueff increasing in order 1 (Cl-) < 2 (Br-) < 3 (I-); however, taking into account the easy-plane type of the magnetic anisotropy, the Raman relaxation process is most likely responsible for slow relaxation of the magnetization. The results of the work revealed that the previously suggested and fully accepted strategy employing heavier halogenido ligands in order to increase the magnetic anisotropy has some limitations in the case of pentagonal-bipyramidal CoII complexes.
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Affiliation(s)
- Bohuslav Drahoš
- Department of Inorganic Chemistry, Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University , 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
| | - Radovan Herchel
- Department of Inorganic Chemistry, Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University , 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
| | - Zdeněk Trávníček
- Department of Inorganic Chemistry, Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University , 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
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31
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Zhang L, Li N, Xu L, Ni Z. Synthesis, crystal structure and magnetic properties of a new cyanide-bridged two-dimensional chromium(I)-cobalt(II) ferromagnet based on pentacyanonitrosylchromate(I). TRANSIT METAL CHEM 2017. [DOI: 10.1007/s11243-017-0147-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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32
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Bar AK, Gogoi N, Pichon C, Goli VMLDP, Thlijeni M, Duhayon C, Suaud N, Guihéry N, Barra AL, Ramasesha S, Sutter JP. Pentagonal Bipyramid Fe II Complexes: Robust Ising-Spin Units towards Heteropolynuclear Nanomagnets. Chemistry 2017; 23:4380-4396. [PMID: 28118518 DOI: 10.1002/chem.201605549] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Indexed: 11/07/2022]
Abstract
Pentagonal bipyramid FeII complexes have been investigated to evaluate their potential as Ising-spin building units for the preparation of heteropolynuclear complexes that are likely to behave as single-molecule magnets (SMMs). The considered monometallic complexes were prepared from the association of a divalent metal ion with pentadentate ligands that have a 2,6-diacetylpyridine bis(hydrazone) core (H2 LN3O2R ). Their magnetic anisotropy was established by magnetometry to reveal their zero-field splitting (ZFS) parameter D, which ranged between -4 and -13 cm-1 and was found to be modulated by the apical ligands (ROH versus Cl). The alteration of the D value by N-bound axial CN ligands, upon association with cyanometallates, was also assessed for heptacoordinated FeII as well as for related NiII and CoII derivatives. In all cases, N-coordinated cyanide ligands led to large magnetic anisotropy (i.e., -8 to -18 cm-1 for Fe and Ni, +33 cm-1 for Co). Ab initio calculations were performed on three FeII complexes, which enabled one to rationalize the role of the ligand on the nature and magnitude of the magnetic anisotropy. Starting from the pre-existing heptacoordinated complexes, a series of pentanuclear compounds were obtained by reactions with paramagnetic [W(CN)8 ]3- . Magnetic studies revealed the occurrence of ferromagnetic interactions between the spin carriers in all the heterometallic systems. Field-induced slow magnetic relaxation was observed for mononuclear FeII complexes (Ueff /kB up to 53 K (37 cm-1 ), τ0 =5×10-9 s), and SMM behavior was evidenced for a heteronuclear [Fe3 W2 ] derivative (Ueff /kB =35 K and τ0 =4.6 10-10 s), which confirmed that the parent complexes were robust Ising-type building units. High-field EPR spectroscopic investigation of the ZFS parameters for a Ni derivative is also reported.
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Affiliation(s)
- Arun Kumar Bar
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne, 31077, Toulouse, France.,Université de Toulouse, UPS, INPT, LCC, 31077, Toulouse, France
| | - Nayanmoni Gogoi
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne, 31077, Toulouse, France.,Université de Toulouse, UPS, INPT, LCC, 31077, Toulouse, France
| | - Céline Pichon
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne, 31077, Toulouse, France.,Université de Toulouse, UPS, INPT, LCC, 31077, Toulouse, France
| | - V M L Durga Prasad Goli
- Indian Institute of Science, Bangalore, 560012, India.,Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan, 44919, Republic of Korea
| | - Mehrez Thlijeni
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne, 31077, Toulouse, France.,Université de Toulouse, UPS, INPT, LCC, 31077, Toulouse, France
| | - Carine Duhayon
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne, 31077, Toulouse, France.,Université de Toulouse, UPS, INPT, LCC, 31077, Toulouse, France
| | - Nicolas Suaud
- Laboratoire de Chimie et Physique Quantiques, UMR5626, IRSAMC, Université de Toulouse 3, Paul Sabatier, 118 route de Narbonne, 31062, Toulouse Cedex 9, France
| | - Nathalie Guihéry
- Laboratoire de Chimie et Physique Quantiques, UMR5626, IRSAMC, Université de Toulouse 3, Paul Sabatier, 118 route de Narbonne, 31062, Toulouse Cedex 9, France
| | - Anne-Laure Barra
- Laboratoire National des Champs Magnétiques Intenses, UPR CNRS 3228, Université Grenoble Alpes, 25, Avenue des Martyrs, B.P. 166, 38042, Grenoble Cedex 9, France
| | - S Ramasesha
- Indian Institute of Science, Bangalore, 560012, India
| | - Jean-Pascal Sutter
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne, 31077, Toulouse, France.,Université de Toulouse, UPS, INPT, LCC, 31077, Toulouse, France
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Bulhac I, Danilescu O, Rija A, Shova S, Kravtsov VC, Bourosh PN. Cobalt(II) complexes with pentadentate Schiff bases 2,6-diacetylpyridine hydrazones: Syntheses and structures. RUSS J COORD CHEM+ 2017. [DOI: 10.1134/s1070328417010018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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34
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Shao D, Zhou Y, Pi Q, Shen FX, Yang SR, Zhang SL, Wang XY. Two-dimensional frameworks formed by pentagonal bipyramidal cobalt(ii) ions and hexacyanometallates: antiferromagnetic ordering, metamagnetism and slow magnetic relaxation. Dalton Trans 2017; 46:9088-9096. [DOI: 10.1039/c7dt01893b] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Two-dimensional frameworks constructed by pentagonal bipyramidal CoII and [M(CN)6]3− units have been synthesized and characterized structurally and magnetically.
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Affiliation(s)
- Dong Shao
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Yan Zhou
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Qian Pi
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Fu-Xing Shen
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Si-Run Yang
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Shao-Liang Zhang
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
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35
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Chen L, Cui HH, Stavretis SE, Hunter SC, Zhang YQ, Chen XT, Sun YC, Wang Z, Song Y, Podlesnyak AA, Ouyang ZW, Xue ZL. Slow Magnetic Relaxations in Cobalt(II) Tetranitrate Complexes. Studies of Magnetic Anisotropy by Inelastic Neutron Scattering and High-Frequency and High-Field EPR Spectroscopy. Inorg Chem 2016; 55:12603-12617. [PMID: 27989182 DOI: 10.1021/acs.inorgchem.6b01544] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Three mononuclear cobalt(II) tetranitrate complexes (A)2[Co(NO3)4] with different countercations, Ph4P+ (1), MePh3P+ (2), and Ph4As+ (3), have been synthesized and studied by X-ray single-crystal diffraction, magnetic measurements, inelastic neutron scattering (INS), high-frequency and high-field EPR (HF-EPR) spectroscopy, and theoretical calculations. The X-ray diffraction studies reveal that the structure of the tetranitrate cobalt anion varies with the countercation. 1 and 2 exhibit highly irregular seven-coordinate geometries, while the central Co(II) ion of 3 is in a distorted-dodecahedral configuration. The sole magnetic transition observed in the INS spectroscopy of 1-3 corresponds to the zero-field splitting (2(D2 + 3E2)1/2) from 22.5(2) cm-1 in 1 to 26.6(3) cm-1 in 2 and 11.1(5) cm-1 in 3. The positive sign of the D value, and hence the easy-plane magnetic anisotropy, was demonstrated for 1 by INS studies under magnetic fields and HF-EPR spectroscopy. The combined analyses of INS and HF-EPR data yield the D values as +10.90(3), +12.74(3), and +4.50(3) cm-1 for 1-3, respectively. Frequency- and temperature-dependent alternating-current magnetic susceptibility measurements reveal the slow magnetization relaxation in 1 and 2 at an applied dc field of 600 Oe, which is a characteristic of field-induced single-molecule magnets (SMMs). The electronic structures and the origin of magnetic anisotropy of 1-3 were revealed by calculations at the CASPT2/NEVPT2 level.
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Affiliation(s)
- Lei Chen
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, People's Republic of China
| | - Hui-Hui Cui
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, People's Republic of China
| | - Shelby E Stavretis
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Seth C Hunter
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University , Nanjing 210023, People's Republic of China
| | - Xue-Tai Chen
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, People's Republic of China
| | - Yi-Chen Sun
- Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology , Wuhan 430074, People's Republic of China
| | - Zhenxing Wang
- Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology , Wuhan 430074, People's Republic of China
| | - You Song
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, People's Republic of China
| | - Andrey A Podlesnyak
- Quantum Condensed Matter Division, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States
| | - Zhong-Wen Ouyang
- Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology , Wuhan 430074, People's Republic of China
| | - Zi-Ling Xue
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
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36
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Shao D, Zhang SL, Shi L, Zhang YQ, Wang XY. Probing the Effect of Axial Ligands on Easy-Plane Anisotropy of Pentagonal-Bipyramidal Cobalt(II) Single-Ion Magnets. Inorg Chem 2016; 55:10859-10869. [DOI: 10.1021/acs.inorgchem.6b00854] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dong Shao
- State
Key Laboratory of Coordination Chemistry, Collaborative Innovation
Center of Advanced Microstructures, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing 210023, China
| | - Shao-Liang Zhang
- State
Key Laboratory of Coordination Chemistry, Collaborative Innovation
Center of Advanced Microstructures, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing 210023, China
| | - Le Shi
- State
Key Laboratory of Coordination Chemistry, Collaborative Innovation
Center of Advanced Microstructures, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing 210023, China
| | - Yi-Quan Zhang
- Jiangsu
Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, China
| | - Xin-Yi Wang
- State
Key Laboratory of Coordination Chemistry, Collaborative Innovation
Center of Advanced Microstructures, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing 210023, China
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37
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Shin JW, Jeong AR, Lee SY, Kim C, Hayami S, Min KS. Trinuclear nickel and cobalt complexes containing unsymmetrical tripodal tetradentate ligands: syntheses, structural, magnetic, and catalytic properties. Dalton Trans 2016; 45:14089-100. [PMID: 27503766 DOI: 10.1039/c6dt02701f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The coordination chemistries of the tetradentate N2O2-type ligands N-(2-pyridylmethyl)iminodiethanol (H2pmide) and N-(2-pyridylmethyl)iminodiisopropanol (H2pmidip) have been investigated with nickel(ii) and cobalt(ii/iii) ions. Three novel complexes prepared and characterized are [(Hpmide)2Ni3(CH3COO)4] (1), [(Hpmide)2Co3(CH3COO)4] (2), and [(pmidip)2Co3(CH3COO)4] (3). In 1 and 2, two terminal nickel(ii)/cobalt(ii) units are coordinated to one Hpmide(-) and two CH3CO2(-). The terminal units are each connected to a central nickel(ii)/cobalt(ii) cation through one oxygen atom of Hpmide(-) and two oxygen atoms of acetate ions, giving rise to nickel(ii) and cobalt(ii) trinuclear complexes, respectively. Trinuclear complexes 1 and 2 are isomorphous. In 3, two terminal cobalt(iii) units are coordinated to pmidip(2-) and two CH3CO2(-). The terminal units are each linked to a central cobalt(ii) cation through two oxygen atoms of pmidip(2-) and one oxygen atom of a bidentate acetate ion, resulting in a linear trinuclear mixed-valence cobalt complex. 1 shows a weak ferromagnetic interaction with the ethoxo and acetato groups between the nickel(ii) ions (g = 2.24, J = 2.35 cm(-1)). However, 2 indicates a weak antiferromagnetic coupling with the ethoxo and acetato groups between the cobalt(ii) ions (g = 2.37, J = -0.5 cm(-1)). Additionally, 3 behaves as a paramagnetic cobalt(ii) monomer, due to the diamagnetic cobalt(iii) ions in the terminal units (g = 2.53, |D| = 36.0 cm(-1)). No catalytic activity was observed in 1. However, 2 and 3 showed significant catalytic activities toward various olefins with modest to good yields. 3 was slightly less efficient toward olefin epoxidation reaction than 2. Also 2 was used for terminal olefin oxidation reaction and was oxidised to the corresponding epoxides in moderate yields (34-75%) with conversions ranging from 47-100%. The cobalt complexes 2 and 3 promoted the O-O bond cleavage to ∼75% heterolysis and ∼25% homolysis.
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Affiliation(s)
- Jong Won Shin
- Department of Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea
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38
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Tools for Predicting the Nature and Magnitude of Magnetic Anisotropy in Transition Metal Complexes: Application to Co(II) Complexes. MAGNETOCHEMISTRY 2016. [DOI: 10.3390/magnetochemistry2030031] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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39
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Schwade VD, Bessega T, Lang ES, Abram U. Pb⋯N interactions and π-stacking in lead(II) bis(hydrazone) compounds. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.04.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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40
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Antal P, Drahoš B, Herchel R, Trávníček Z. Late First-Row Transition-Metal Complexes Containing a 2-Pyridylmethyl Pendant-Armed 15-Membered Macrocyclic Ligand. Field-Induced Slow Magnetic Relaxation in a Seven-Coordinate Cobalt(II) Compound. Inorg Chem 2016; 55:5957-72. [DOI: 10.1021/acs.inorgchem.6b00415] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Peter Antal
- Department of Inorganic Chemistry, Regional Centre of
Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
| | - Bohuslav Drahoš
- Department of Inorganic Chemistry, Regional Centre of
Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
| | - Radovan Herchel
- Department of Inorganic Chemistry, Regional Centre of
Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
| | - Zdeněk Trávníček
- Department of Inorganic Chemistry, Regional Centre of
Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
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41
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Hazra A, Bonakala S, Bejagam KK, Balasubramanian S, Maji TK. Host-Guest [2+2] Cycloaddition Reaction: Postsynthetic Modulation of CO2
Selectivity and Magnetic Properties in a Bimodal Metal-Organic Framework. Chemistry 2016; 22:7792-9. [DOI: 10.1002/chem.201505131] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Indexed: 01/17/2023]
Affiliation(s)
- Arpan Hazra
- Chemistry and Physics of Materials Unit (CPMU); Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR); Jakkur Bangalore 560064 Karnataka India
| | - Satyanarayana Bonakala
- Chemistry and Physics of Materials Unit (CPMU); Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR); Jakkur Bangalore 560064 Karnataka India
| | - Karteek K. Bejagam
- Chemistry and Physics of Materials Unit (CPMU); Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR); Jakkur Bangalore 560064 Karnataka India
| | - Sundaram Balasubramanian
- Chemistry and Physics of Materials Unit (CPMU); Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR); Jakkur Bangalore 560064 Karnataka India
| | - Tapas Kumar Maji
- Chemistry and Physics of Materials Unit (CPMU); Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR); Jakkur Bangalore 560064 Karnataka India
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42
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Brađan G, Čobeljić B, Pevec A, Turel I, Milenković M, Radanović D, Šumar-Ristović M, Adaila K, Milenković M, Anđelković K. Synthesis, characterization and antimicrobial activity of pentagonal-bipyramidal isothiocyanato Co(II) and Ni(II) complexes with 2,6-diacetylpyridine bis(trimethylammoniumacetohydrazone). J COORD CHEM 2016. [DOI: 10.1080/00958972.2016.1139702] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
| | | | - Andrej Pevec
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Iztok Turel
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Marina Milenković
- Faculty of Pharmacy, Department of Microbiology and Immunology, University of Belgrade, Belgrade, Serbia
| | - Dušanka Radanović
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Belgrade, Serbia
| | | | - Kawther Adaila
- Faculty of Chemistry, University of Belgrade, Belgrade, Serbia
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43
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Magnetic anisotropy in two- to eight-coordinated transition–metal complexes: Recent developments in molecular magnetism. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.06.013] [Citation(s) in RCA: 304] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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44
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Shao D, Shi L, Zhang SL, Zhao XH, Wu DQ, Wei XQ, Wang XY. Syntheses, structures, and magnetic properties of three new chain compounds based on a pentagonal bipyramidal Co(ii) building block. CrystEngComm 2016. [DOI: 10.1039/c5ce02594j] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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45
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Dey M, Dutta S, Sarma B, Deka RC, Gogoi N. Modulation of the coordination environment: a convenient approach to tailor magnetic anisotropy in seven coordinate Co(ii) complexes. Chem Commun (Camb) 2016; 52:753-6. [DOI: 10.1039/c5cc07397a] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Subtle modulation of the coordination environment in seven coordinate Co(ii) complexes leads to a remarkable deviation in the axial zero field splitting parameter (D) in a predictable fashion.
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Affiliation(s)
- Mamon Dey
- Department of Chemical Sciences
- Tezpur University
- Napaam-784028
- India
| | - Snigdha Dutta
- Department of Chemical Sciences
- Tezpur University
- Napaam-784028
- India
| | - Bipul Sarma
- Department of Chemical Sciences
- Tezpur University
- Napaam-784028
- India
| | - Ramesh Ch. Deka
- Department of Chemical Sciences
- Tezpur University
- Napaam-784028
- India
| | - Nayanmoni Gogoi
- Department of Chemical Sciences
- Tezpur University
- Napaam-784028
- India
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46
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Tiago FS, Santiago PH, Amaral MM, Martins JB, Gatto CC. New Cu(II) complex with acetylpyridine benzoyl hydrazone: experimental and theoretical analysis. J COORD CHEM 2015. [DOI: 10.1080/00958972.2015.1105367] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Fernanda S. Tiago
- Laboratory of Computational Chemistry, University of Brasília (IQ-UnB), Brasília, Brazil
| | - Pedro H.O. Santiago
- Laboratory of Inorganic Synthesis and Crystallography, University of Brasília (IQ-UnB), Brasília, Brazil
| | - Marília M.P. Amaral
- Laboratory of Inorganic Synthesis and Crystallography, University of Brasília (IQ-UnB), Brasília, Brazil
| | - João B.L. Martins
- Laboratory of Computational Chemistry, University of Brasília (IQ-UnB), Brasília, Brazil
| | - Claudia C. Gatto
- Laboratory of Inorganic Synthesis and Crystallography, University of Brasília (IQ-UnB), Brasília, Brazil
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47
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Prado Y, Daffé N, Michel A, Georgelin T, Yaacoub N, Grenèche JM, Choueikani F, Otero E, Ohresser P, Arrio MA, Cartier-dit-Moulin C, Sainctavit P, Fleury B, Dupuis V, Lisnard L, Fresnais J. Enhancing the magnetic anisotropy of maghemite nanoparticles via the surface coordination of molecular complexes. Nat Commun 2015; 6:10139. [PMID: 26634987 PMCID: PMC4686836 DOI: 10.1038/ncomms10139] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 11/08/2015] [Indexed: 12/16/2022] Open
Abstract
Superparamagnetic nanoparticles are promising objects for data storage or medical applications. In the smallest--and more attractive--systems, the properties are governed by the magnetic anisotropy. Here we report a molecule-based synthetic strategy to enhance this anisotropy in sub-10-nm nanoparticles. It consists of the fabrication of composite materials where anisotropic molecular complexes are coordinated to the surface of the nanoparticles. Reacting 5 nm γ-Fe2O3 nanoparticles with the [Co(II)(TPMA)Cl2] complex (TPMA: tris(2-pyridylmethyl)amine) leads to the desired composite materials and the characterization of the functionalized nanoparticles evidences the successful coordination--without nanoparticle aggregation and without complex dissociation--of the molecular complexes to the nanoparticles surface. Magnetic measurements indicate the significant enhancement of the anisotropy in the final objects. Indeed, the functionalized nanoparticles show a threefold increase of the blocking temperature and a coercive field increased by one order of magnitude.
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Affiliation(s)
- Yoann Prado
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8234, PHENIX, CNRS, F-75005 Paris, France
| | - Niéli Daffé
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8234, PHENIX, CNRS, F-75005 Paris, France
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, UMR 7590, CNRS, UPMC, IRD, MNHN, F-75005 Paris, France
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin—BP 48, 91192 Gif-sur-Yvette, France
| | - Aude Michel
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8234, PHENIX, CNRS, F-75005 Paris, France
| | - Thomas Georgelin
- Sorbonne Universités, UPMC Univ Paris 06, UMR 7197, LRS, F-94200 Ivry-sur-Seine, France
- CNRS, UMR 7197, Laboratoire de Réactivité de Surface, F-94200 Ivry-sur-Seine, France
| | - Nader Yaacoub
- Institut des Molécules et Matériaux du Mans CNRS UMR-6283, Université du Maine, F-72085 Le Mans, France
| | - Jean-Marc Grenèche
- Institut des Molécules et Matériaux du Mans CNRS UMR-6283, Université du Maine, F-72085 Le Mans, France
| | - Fadi Choueikani
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin—BP 48, 91192 Gif-sur-Yvette, France
| | - Edwige Otero
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin—BP 48, 91192 Gif-sur-Yvette, France
| | - Philippe Ohresser
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin—BP 48, 91192 Gif-sur-Yvette, France
| | - Marie-Anne Arrio
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, UMR 7590, CNRS, UPMC, IRD, MNHN, F-75005 Paris, France
| | - Christophe Cartier-dit-Moulin
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8232, IPCM, F-75005 Paris, France
- CNRS, UMR 8232, Institut Parisien de Chimie Moléculaire, F-75005 Paris, France
| | - Philippe Sainctavit
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, UMR 7590, CNRS, UPMC, IRD, MNHN, F-75005 Paris, France
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin—BP 48, 91192 Gif-sur-Yvette, France
| | - Benoit Fleury
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8232, IPCM, F-75005 Paris, France
- CNRS, UMR 8232, Institut Parisien de Chimie Moléculaire, F-75005 Paris, France
| | - Vincent Dupuis
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8234, PHENIX, CNRS, F-75005 Paris, France
| | - Laurent Lisnard
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8232, IPCM, F-75005 Paris, France
- CNRS, UMR 8232, Institut Parisien de Chimie Moléculaire, F-75005 Paris, France
| | - Jérôme Fresnais
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8234, PHENIX, CNRS, F-75005 Paris, France
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48
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Shao D, Zhang SL, Zhao XH, Wang XY. Spin canting, metamagnetism, and single-chain magnetic behaviour in a cyano-bridged homospin iron(II) compound. Chem Commun (Camb) 2015; 51:4360-3. [PMID: 25600433 DOI: 10.1039/c4cc10003d] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spin canting, antiferromagnetic ordering, metamagnetism and single-chain magnetism were verified in a cyano-bridged Fe(II) compound synthesized from the pentagonal bipyramidal Fe(II) starting material in the presence of excessive BF4(-) anions.
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Affiliation(s)
- Dong Shao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China.
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49
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Zhang SL, Zhao XH, Wang XY. Syntheses, structures, and magnetic properties of three new cyano-bridged complexes based on the [Mn(CN)6]3−building block. Dalton Trans 2015; 44:15189-97. [DOI: 10.1039/c5dt00038f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
By tuning the reaction conditions and using macrocyclic ligands, three [Mn(CN)6]3−-based magnetic complexes were prepared and characterized.
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Affiliation(s)
- Shao-Liang Zhang
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Xin-Hua Zhao
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
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50
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Chen L, Chen SY, Sun YC, Guo YM, Yu L, Chen XT, Wang Z, Ouyang ZW, Song Y, Xue ZL. Slow magnetic relaxation in mononuclear seven-coordinate cobalt(ii) complexes with easy plane anisotropy. Dalton Trans 2015; 44:11482-90. [DOI: 10.1039/c5dt00785b] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two mononuclear pentagonal bipyramid cobalt(ii) complexes with positive zero-field splitting D values were demonstrated to exhibit field-induced slow relaxation behaviour.
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Affiliation(s)
- Lei Chen
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Shu-Yang Chen
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Yi-Chen Sun
- Wuhan National High Magnetic Field Center
- Huazhong University of Science and Technology
- Wuhan 430074
- China
| | - Yu-Mei Guo
- Wuhan National High Magnetic Field Center
- Huazhong University of Science and Technology
- Wuhan 430074
- China
| | - Lu Yu
- High Magnetic Field Laboratory
- Hefei Institutes of Physical Science
- Chinese Academy of Sciences
- Hefei 230031
- China
| | - Xue-Tai Chen
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Zhenxing Wang
- Wuhan National High Magnetic Field Center
- Huazhong University of Science and Technology
- Wuhan 430074
- China
| | - Z. W. Ouyang
- Wuhan National High Magnetic Field Center
- Huazhong University of Science and Technology
- Wuhan 430074
- China
| | - You Song
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Zi-Ling Xue
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
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