1
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Terlecki M, Kornowicz A, Sacharczuk K, Justyniak I, Lewiński J. Synthesis, polymorphism, and shape complementarity-induced co-crystallization of hexanuclear Co(II) clusters capped by a flexible heteroligand shell. Dalton Trans 2024; 53:7012-7022. [PMID: 38563241 DOI: 10.1039/d4dt00261j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Polymorphism and co-crystallization have gradually gained attention as new tools in the development of modern crystalline functional materials. However, the study on the selective self-assembly of metal clusters into multicomponent crystals is still in its infancy. Herein, we present the synthesis and characterization of two new heteroleptic hydroxido-acetato and acetato Co(II) clusters [Co6(OH)2(OAc)4(pyret)6] (1) and [Co6(OAc)6(pyret)6] (2) incorporating auxiliary 2-pyrrolidinoethoxylate (pyret) ligands. On this occasion, we revealed that the commonly used thermal procedure for dehydration of cobalt(II) acetate leads to a reagent comprising substantial contamination by cobalt hydroxido moieties. Comprehensive structural analysis of new compounds demonstrated intriguing crystal structure diversity of hydroxido-acetato cluster 1, which represents a rare example of both conformational and packing polymorphism in one compound, originating from the flexibility of organic O,N-ligands in the secondary coordination sphere. Furthermore, both clusters exhibit an interesting propensity for the selective formation of co-crystals 1·2 driven mainly by van der Waals forces and specific shape complementarity between co-formers.
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Affiliation(s)
- Michał Terlecki
- Faculty of Chemistry, Warsaw University of Technology, Noakowsiego 3, 00-664 Warsaw, Poland.
| | - Arkadiusz Kornowicz
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Kornel Sacharczuk
- Faculty of Chemistry, Warsaw University of Technology, Noakowsiego 3, 00-664 Warsaw, Poland.
| | - Iwona Justyniak
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Janusz Lewiński
- Faculty of Chemistry, Warsaw University of Technology, Noakowsiego 3, 00-664 Warsaw, Poland.
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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2
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Biswas B, Siddiqui AI, Majee MC, Saha SK, Mondal B, Saha R, Gómez García CJ. Heptanuclear Mixed-Valence Co 4IIICo 3II Molecular Wheel─A Molecular Analogue of Layered Double Hydroxides with Single-Molecule Magnet Behavior and Electrocatalytic Activity for Hydrogen Evolution Reactions. Inorg Chem 2024; 63:6161-6172. [PMID: 38526851 PMCID: PMC11005049 DOI: 10.1021/acs.inorgchem.3c04065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 01/26/2024] [Accepted: 02/26/2024] [Indexed: 03/27/2024]
Abstract
We present a bifunctional heptanuclear cobalt(II)/cobalt(III) molecular complex formulated as [Co7(μ3-OH)4(H2L1)2(HL2)2](NO3)6·6H2O (1) (where H5L1 is 2,2'-(((1E,1'E)-((2-hydroxy-5-methyl-1,3-phenylene)bis(methanylylidene))bis(azanylylidene))bis(propane-1,3-diol)) and H2L2 is 2-amino-1,3-propanediol). Compound 1 has been characterized by single-crystal X-ray diffraction analysis along with other spectral and magnetic measurements. Structural analysis indicates that 1 contains a mixed-valence Co7 cluster where a central Co(II) ion is connected to six different Co centers (four CoIII and two CoII ions) by four μ3-OH groups, giving rise to a planar heptanuclear cluster that resembles a molecular fragment of a layered double hydroxide (LDH). Two triply deprotonated (H2L1)3- ligands form the outer side of the cluster while two singly deprotonated (HL2)- ligands are located at the top and bottom of the central heptanuclear core. Variable temperature magnetic measurements indicate the presence of weak ferromagnetic CoII···CoII interactions (J = 3.53(6) cm-1) within the linear trinuclear CoII cluster. AC susceptibility measurements show that 1 is a field-induced single-molecule magnet (SMM) with τ0 = 8.2(7) × 10-7 s and Ueff = 11.3(4) K. The electrocatalytic hydrogen evolution reaction (HER) activity of 1 in homogeneous phase shows an overpotential of 455 mV, with a Faradaic efficiency of 81% and a TOF of 8.97 × 104 μmol H2 h-1 mol-1.
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Affiliation(s)
- Biplab Biswas
- Department
of Chemistry, Kazi Nazrul University, Asansol 713340, West Bengal, India
- Department
of Chemistry, Hooghly Mohsin College, Chinsurah 712101, West Bengal, India
| | | | | | - Swadhin Kumar Saha
- Department
of Chemistry, Kazi Nazrul University, Asansol 713340, West Bengal, India
| | - Biswajit Mondal
- Department
of Chemistry, IIT Gandhinagar, Palaj 382355, Gujarat, India
| | - Rajat Saha
- Department
of Chemistry, Kazi Nazrul University, Asansol 713340, West Bengal, India
- Departamento
de Química Inorgánica, Universidad
de Valencia, Burjasot, Valencia 46100, Spain
| | - Carlos J. Gómez García
- Departamento
de Química Inorgánica, Universidad
de Valencia, Burjasot, Valencia 46100, Spain
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3
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Ilango PR, Savariraj AD, Huang H, Li L, Hu G, Wang H, Hou X, Kim BC, Ramakrishna S, Peng S. Electrospun Flexible Nanofibres for Batteries: Design and Application. ELECTROCHEM ENERGY R 2023. [DOI: 10.1007/s41918-022-00148-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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4
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Kant S, Saha S, Lloret F, Cano J, Mukherjee R. A tetracobalt(II) cluster with a two vertex truncated dicubane topology endogenously supported by carboxylate-based (2-pyridyl)methylamine ligands: magneto-structural and DFT studies. Dalton Trans 2023; 52:11922-11933. [PMID: 37574905 DOI: 10.1039/d3dt01131c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
A reaction between CoCl2 and L3-(CO2-)2 (2 : 1 stoichiometry) in CH3OH affords a discrete complex [CoII4-{L3-(CO2-)2}2(μ3-OCH3)2(CH3OH)2(H2O)2Cl2] (1) [L3-(CO2-)2 = 3-[N-{2-(pyridin-2-yl)methyl}amino]-bis(propionate)]. The structure of 1 reveals two terminal mononuclear CoII{L3-(CO2-)2}Cl units connected by a dimeric CoII2(μ3-OCH3)2(CH3OH)2(H2O) unit present in the centre through two methoxo (μ3-OCH3)- and two carboxylate (μ-1,1-OCO-) bridges affording a tetranuclear coordination cluster of Co(II) with a defective dicubane topology. In 1, Co1 (terminal) has distorted octahedral CoIIN2O3Cl and the central Co2 has CoIIO6 coordination. Such coordination arrangements afford the observed topology. Variable-temperature magnetic studies reveal anti-ferromagnetic coupling in 1. Three magnetic exchange interactions (one anti-ferromagnetic and two ferromagnetic: J1 = +3.3 cm-1 (Co⋯Co 3.176 Å; μ-1,1-OCO- and μ3-OCH3 bridges), J2 = -2.5 cm-1 (Co⋯Co 3.228 Å; μ-1-OCO- and μ3-OCH3 bridges) and J3 = +10.6 cm-1 (Co⋯Co 3.084 Å; two μ3-OCH3 bridges)) have been identified, with the inclusion of the orbital reduction parameter (α = Aκ = 1.38), spin-orbit coupling (λ = -158 cm-1) and axial distortion (energy gap Δ = -975 cm-1 between singlet and doublet levels), rationalized by density functional theory (DFT) calculations.
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Affiliation(s)
- Shashi Kant
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India.
- Department of Chemistry, Bhola Prasad Singh College, Bhore, Gopalganj (Jai Prakash University Chapra), Bihar 841426, India
| | - Sayan Saha
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India.
| | - Francesc Lloret
- Departament de Química Inorgànica/Instituto de Ciencia Molecular (ICMOL), Universitat de València, Polígono de la Coma, s/n, 46980 Paterna, València, Spain
| | - Joan Cano
- Instituto de Ciencia Molecular/Departament de Química Inorgànica, Universitat de València, C/Catedrático José Beltrán 2, 46980 Paterna, València, Spain.
| | - Rabindranath Mukherjee
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India.
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5
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Luo D, Xiao H, Zhang MY, Li SD, He L, Lv H, Li CS, Lin QP, Fang WH, Zhang J. Accurate binding of porous aluminum molecular ring catalysts with the substrate. Chem Sci 2023; 14:5396-5404. [PMID: 37234899 PMCID: PMC10208054 DOI: 10.1039/d3sc01260c] [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: 03/08/2023] [Accepted: 03/30/2023] [Indexed: 05/28/2023] Open
Abstract
Metal molecular rings are a class of compounds with aesthetically pleasing symmetry and fundamentally useful properties. The reported work generally focuses on the ring center cavity, and there is little known about those on the ring waist. Herein, we report the discovery of porous aluminum molecular rings and their performance and contribution to the cyanosilylation reaction. We develop a facile ligand induced aggregation and solvent regulation strategy towards AlOC-58NC and AlOC-59NT with high purity, high yield (75% and 70%, respectively) and gram-level scale-up. These molecular rings exhibit a "two-tier" pore feature involving the general central cavity and newly observed equatorial semi-open cavities. AlOC-59NT with two types of one-dimensional channels showed good catalytic activity. The interaction of the aluminum molecular ring catalyst with the substrate has been crystallographically characterized and theoretically confirmed, showing a ring adaptability process that involves the capture and binding of the substrate. This work provides new ideas for the assembly of porous metal molecular rings and to understand the overall reaction pathway involving aldehydes and is expected to inspire the design of low-cost catalysts through structural modifications.
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Affiliation(s)
- Dan Luo
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences 350002 Fuzhou P. R. China
| | - Han Xiao
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences 350002 Fuzhou P. R. China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Min-Yi Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences 350002 Fuzhou P. R. China
| | - Shang-Da Li
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences 350002 Fuzhou P. R. China
| | - Liang He
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences 350002 Fuzhou P. R. China
| | - Hong Lv
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences 350002 Fuzhou P. R. China
| | - Chun-Sen Li
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences 350002 Fuzhou P. R. China
- Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry Xiamen Fujian 361005 China
| | - Qi-Pu Lin
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences 350002 Fuzhou P. R. China
| | - Wei-Hui Fang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences 350002 Fuzhou P. R. China
| | - Jian Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences 350002 Fuzhou P. R. China
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6
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Cabrosi D, Cruz C, Paredes-García V, Alborés P. A dinuclear Co( iii)/Co( ii) complex based on the H 2pmide ligand showing field-induced SMM behaviour. Dalton Trans 2023; 52:175-184. [DOI: 10.1039/d2dt03492a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We report a combined computational and experimental study of the field-induced SMM behaviour of a Co(ii)/Co(iii) dinuclear complex with a pair-like H-bond intermolecular interaction.
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Affiliation(s)
- Daiana Cabrosi
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE (CONICET), Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
| | - Carlos Cruz
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Avenida República 275, Santiago de Chile, Chile
- Centro para el Desarrollo de la Nanociencia y Nanotecnología, CEDENNA, Santiago, Chile
| | - Verónica Paredes-García
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Avenida República 275, Santiago de Chile, Chile
- Centro para el Desarrollo de la Nanociencia y Nanotecnología, CEDENNA, Santiago, Chile
| | - Pablo Alborés
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE (CONICET), Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
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7
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Rojek T, Ślepokura K, Kinzhybalo V, Duczmal M, Wojciechowska A, Matczak-Jon E. Synthesis, structural, spectroscopic and magnetic studies of tetranuclear Ni(II) and Co(II) clusters based on cyclobutyl and cyclopentyl-substituted analogues of zoledronic acid. Polyhedron 2023. [DOI: 10.1016/j.poly.2023.116301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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8
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Probing the electronic nature of Co centers forming the planar ring in octa-nuclear Co complexes using X-ray absorption spectroscopy. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Dimakopoulou F, Efthymiou CG, O’Malley C, Kourtellaris A, Moushi E, Tasiopooulos A, Perlepes SP, McArdle P, Costa-Villén E, Mayans J, Papatriantafyllopoulou C. Novel Co5 and Ni4 Metal Complexes and Ferromagnets by the Combination of 2-Pyridyl Oximes with Polycarboxylic Ligands. Molecules 2022; 27:molecules27154701. [PMID: 35897877 PMCID: PMC9332737 DOI: 10.3390/molecules27154701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 07/18/2022] [Accepted: 07/20/2022] [Indexed: 02/01/2023] Open
Abstract
The use of 2-pyridyl oximes in metal complexes chemistry has been extensively investigated in the last few decades as a fruitful source of species with interesting magnetic properties. In this work, the initial combination of pyridine-2-amidoxime (pyaoxH2) and 2-methyl pyridyl ketoxime (mpkoH) with isonicotinic acid (HINA) and 3,5-pyrazole dicarboxylic acid (H3pdc) has provided access to three new compounds, [Ni4(INA)2(pyaox)2(pyaoxH)2(DMF)2] (1), [Co5(mpko)6(mpkoH)2(OMe)2(H2O)](ClO4)6 (2), and [Co5(OH)(Hpdc)5(H2pdc)] (3). 1 displays a square-planar metal topology, being the first example that bears simultaneously HINA and pyaoxH2 in their neutral or ionic form. The neighbouring Ni4 units in 1 are held together through strong intermolecular hydrogen bonding interactions, forming a three-dimensional supramolecular framework. 2 and 3 are mixed-valent Co4IIICoII and Co2IIICoII3 compounds with a bowtie and trigonal bipyramidal metal topology, accordingly. Direct current and alternate current magnetic susceptibility studies revealed that the exchange interactions between the NiII ions in 1 are ferromagnetic (J = 1.79(4) cm−1), while 2 exhibits weak AC signals in the presence of a magnetic field. The syntheses, crystal structures, and magnetic properties of 1–3 are discussed in detail.
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Affiliation(s)
- Foteini Dimakopoulou
- School of Biological and Chemical Sciences, College of Science and Engineering, National University of Ireland Galway, University Road, H91 TK33 Galway, Ireland; (F.D.); (C.G.E.); (C.O.); (P.M.)
| | - Costantinos G. Efthymiou
- School of Biological and Chemical Sciences, College of Science and Engineering, National University of Ireland Galway, University Road, H91 TK33 Galway, Ireland; (F.D.); (C.G.E.); (C.O.); (P.M.)
| | - Ciaran O’Malley
- School of Biological and Chemical Sciences, College of Science and Engineering, National University of Ireland Galway, University Road, H91 TK33 Galway, Ireland; (F.D.); (C.G.E.); (C.O.); (P.M.)
| | - Andreas Kourtellaris
- Department of Chemistry, University of Cyprus, Nicosia 1678, Cyprus; (A.K.); (A.T.)
| | - Eleni Moushi
- Department of Life Sciences, European University of Cyprus, Nicosia 2404, Cyprus;
| | | | | | - Patrick McArdle
- School of Biological and Chemical Sciences, College of Science and Engineering, National University of Ireland Galway, University Road, H91 TK33 Galway, Ireland; (F.D.); (C.G.E.); (C.O.); (P.M.)
| | - Ernesto Costa-Villén
- Departament de Química Inorgànica i Orgànica, Secció Inorgànica and Institute of Nanoscience (IN2UB) and Nanotecnology, Universitat de Barcelona, Marti i Franques 1-11, 08028 Barcelona, Spain; (E.C.-V.); (J.M.)
| | - Julia Mayans
- Departament de Química Inorgànica i Orgànica, Secció Inorgànica and Institute of Nanoscience (IN2UB) and Nanotecnology, Universitat de Barcelona, Marti i Franques 1-11, 08028 Barcelona, Spain; (E.C.-V.); (J.M.)
| | - Constantina Papatriantafyllopoulou
- School of Biological and Chemical Sciences, College of Science and Engineering, National University of Ireland Galway, University Road, H91 TK33 Galway, Ireland; (F.D.); (C.G.E.); (C.O.); (P.M.)
- Correspondence: ; Tel.: +353-91-493462
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10
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Xu Q, Liu B, Ye M, Zhuang G, Long L, Zheng L. Gd(OH)F 2: A Promising Cryogenic Magnetic Refrigerant. J Am Chem Soc 2022; 144:13787-13793. [PMID: 35860923 DOI: 10.1021/jacs.2c04840] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Magnetic refrigerants with a large magnetocaloric effect (MCE) in a wide temperature range and low magnetic ordering temperature (To) in the sub-kelvin temperature region are not only crucial for adiabatic demagnetization refrigeration but also open up a broader parameter space for the optimal design of adiabatic demagnetization refrigerators. However, such magnetic refrigerants are extremely rare because they require magnetic materials to simultaneously satisfy three conditions: low To, weak magnetic interaction, and high magnetic density. Here, we report the syntheses, heat capacities, and magnetic properties of Gd(OH)3-xFx (1: x = 1, 2: x ≈ 1.5, and 3: x = 2), demonstrating for the first time that the introduction of fluoride anions into antiferromagnetic Gd(OH)3 can effectively regulate its To. Significantly, 3 not only has a To of 0.5 K but also exhibits a large MCE in the temperature range from 0.5 to 4 K, representing the best magnetic refrigerant reported to date in the temperature range of 0.5-4 K from the viewpoint of the MCE.
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Affiliation(s)
- Qiaofei Xu
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Boliang Liu
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Mingyu Ye
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Guilin Zhuang
- College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310032, Zhejiang Province, China
| | - Lasheng Long
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Lansun Zheng
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
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11
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12
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Ligand mediated structural diversity of copper(II)-azido moiety: Synthesis, structure and magnetic study. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2021.120713] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Kornowicz A, Terlecki M, Justyniak I, Prochowicz D, van Leusen J, Kögerler P, Lewiński J. Cyclodextrin-Templated Co(II) Grids: Symmetry Control over Supramolecular Topology and Magnetic Properties. Inorg Chem 2022; 61:2499-2508. [PMID: 35072458 PMCID: PMC8826275 DOI: 10.1021/acs.inorgchem.1c03344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
While inherent complexation
properties and propensity for self-organization
of cyclodextrins (CDs) render them potentially promising scaffolds
of magnetic materials, this research area is still at an embryonic
stage. We report on the synthesis and structure characterization of
a new sandwich-type complex, [(α-CD)2Co3Li6(H2O)9] (α-1), which represents a smaller analogue of the previously characterized
[(γ-CD)2Co4Li8(H2O)12] (γ-1) cluster. A comprehensive
structural analysis of α-1 and a careful reinvestigation
of γ-1 reveal how the symmetry of CD ligands determines
the molecular composition and supramolecular arrangements of Co/Li
sandwich-type complexes. Furthermore, the first comparative studies
of the magnetic properties in this type of system point to subtle
differences in the magnetic behavior of both compounds. The sandwich-type
complexes α-1 and γ-1 exhibit
field-induced slow magnetic relaxation, defining a new family of magnetic
materials with a pillared grid-like supramolecular structure composed
of weakly interacting CoII centers forming an SMM. Cyclodextrin-based coordination systems
are potentially
promising scaffolds of supramolecular materials, including functional
magnetic systems. A comprehensive structural analysis of α-
and γ-cyclodextrin-based Co(II) coordination complexes reveals
how the symmetry of macrocyclic ligands determines the molecular composition
and supramolecular arrangements of Co/Li sandwich-type structures.
Furthermore, the first comparative studies of the magnetic properties
in this type of system point to subtle differences in the magnetic
behavior of both compounds.
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Affiliation(s)
- Arkadiusz Kornowicz
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Michał Terlecki
- Faculty of Chemistry,Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - Iwona Justyniak
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Daniel Prochowicz
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Jan van Leusen
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Paul Kögerler
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Janusz Lewiński
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
- Faculty of Chemistry,Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
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14
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Zhang LM, Feng C, Yang YM, Huang HH, Zhang GN, Wang YC, Zhao H. Influence of reaction temperature and stoichiometry on the coordination mode of a multidentate pyridylpyrazole ligand in Co( ii) complexes: from a 0D mononuclear structure to 3D frameworks. CrystEngComm 2022. [DOI: 10.1039/d2ce00468b] [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
Three Co(ii) coordination polymers with different dimensionality have been successfully constructed under controlled conditions by changing the reaction temperature and stoichiometry.
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Affiliation(s)
- Ling-Mei Zhang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, PR China
| | - Chao Feng
- School of Materials and Chemical Engineering, Bengbu University, Bengbu 233030, PR China
| | - Yu-Meng Yang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, PR China
| | - Huan-Huan Huang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, PR China
| | - Guo-Ning Zhang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, PR China
| | - Yu-Cheng Wang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, PR China
| | - Hong Zhao
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, PR China
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15
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Arauzo A, Bartolomé E, Luzón J, Alonso PJ, Vlad A, Cazacu M, Zaltariov MF, Shova S, Bartolomé J, Turta C. Slow Magnetic Relaxation in {[CoCxAPy)] 2.15 H 2O} n MOF Built from Ladder-Structured 2D Layers with Dimeric SMM Rungs. Molecules 2021; 26:5626. [PMID: 34577095 PMCID: PMC8466197 DOI: 10.3390/molecules26185626] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 09/03/2021] [Accepted: 09/10/2021] [Indexed: 11/17/2022] Open
Abstract
We present the magnetic properties of the metal-organic framework {[CoCxAPy]·2.15 H2O}n (Cx = bis(carboxypropyl)tetramethyldisiloxane; APy = 4,4`-azopyridine) (1) that builds up from the stacking of 2D coordination polymers. The 2D-coordination polymer in the bc plane is formed by the adjacent bonding of [CoCxAPy] 1D two-leg ladders with Co dimer rungs, running parallel to the c-axis. The crystal packing of 2D layers shows the presence of infinite channels running along the c crystallographic axis, which accommodate the disordered solvate molecules. The Co(II) is six-coordinated in a distorted octahedral geometry, where the equatorial plane is occupied by four carboxylate oxygen atoms. Two nitrogen atoms from APy ligands are coordinated in apical positions. The single-ion magnetic anisotropy has been determined by low temperature EPR and magnetization measurements on an isostructural compound {[Zn0.8Co0.2CxAPy]·1.5 CH3OH}n (2). The results show that the Co(II) ion has orthorhombic anisotropy with the hard-axis direction in the C2V main axis, lying the easy axis in the distorted octahedron equatorial plane, as predicted by the ab initio calculations of the g-tensor. Magnetic and heat capacity properties at very low temperatures are rationalized within a S* = 1/2 magnetic dimer model with anisotropic antiferromagnetic interaction. The magnetic dimer exhibits slow relaxation of the magnetization (SMM) below 6 K in applied field, with a tlf ≈ 2 s direct process at low frequencies, and an Orbach process at higher frequencies with U/kB = 6.7 ± 0.5 K. This compound represents a singular SMM MOF built-up of Co-dimers with an anisotropic exchange interaction.
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Affiliation(s)
- Ana Arauzo
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain; (J.L.); (P.J.A.); (J.B.)
| | - Elena Bartolomé
- Department of Mechanical Engineering, Escola Universitària Salesiana de Sarrià (EUSS), Passeig de Sant Joan Bosco, 74, 08017 Barcelona, Spain;
| | - Javier Luzón
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain; (J.L.); (P.J.A.); (J.B.)
- Centro Universitario de la Defensa, Ctra. de Huesca s/n, 50090 Zaragoza, Spain
| | - Pablo J. Alonso
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain; (J.L.); (P.J.A.); (J.B.)
| | - Angelica Vlad
- Department of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania; (A.V.); (M.C.); (M.F.Z.); (S.S.)
| | - Maria Cazacu
- Department of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania; (A.V.); (M.C.); (M.F.Z.); (S.S.)
| | - Mirela F. Zaltariov
- Department of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania; (A.V.); (M.C.); (M.F.Z.); (S.S.)
| | - Sergiu Shova
- Department of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania; (A.V.); (M.C.); (M.F.Z.); (S.S.)
| | - Juan Bartolomé
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain; (J.L.); (P.J.A.); (J.B.)
| | - Constantin Turta
- Department of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania; (A.V.); (M.C.); (M.F.Z.); (S.S.)
- Institute of Chemistry, Academy of Sciences of Moldova, Academiei 3, MD-2028 Chisinau, Moldova
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16
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Multireversible Redox Processes in a Self‐Assembled Nickel Pentanuclear Bis(Triple‐stranded Helicate): Structural and Spectroscopic Characterizations in the Ni
II
5
and Ni
I
Ni
II
4
Redox States. ChemElectroChem 2021. [DOI: 10.1002/celc.202100895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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17
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Akintola O, Buchholz A, Görls H, Plass W. Modulator Induced Formation of a Neutral Framework Based on Trinuclear Cobalt(II) Clusters and Nitrilotribenzoic Acid: Synthesis, Magnetism, and Sorption Properties. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100231] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Oluseun Akintola
- Institut für Anorganische und Analytische Chemie Friedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
| | - Axel Buchholz
- Institut für Anorganische und Analytische Chemie Friedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
| | - Helmar Görls
- Institut für Anorganische und Analytische Chemie Friedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie Friedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
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18
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Astakhov GS, Levitsky MM, Zubavichus YV, Khrustalev VN, Titov AA, Dorovatovskii PV, Smol'yakov AF, Shubina ES, Kirillova MV, Kirillov AM, Bilyachenko AN. Cu 6- and Cu 8-Cage Sil- and Germsesquioxanes: Synthetic and Structural Features, Oxidative Rearrangements, and Catalytic Activity. Inorg Chem 2021; 60:8062-8074. [PMID: 33979518 DOI: 10.1021/acs.inorgchem.1c00586] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This study reports intriguing features in the self-assembly of cage copper(II) silsesquioxanes in the presence of air. Despite the wide variation of solvates used, a series of prismatic hexanuclear Cu6 cages (1-5) were assembled under mild conditions. In turn, syntheses at higher temperatures are accompanied by side reactions, leading to the oxidation of solvates (methanol, 1-butanol, and tetrahydrofuran). The oxidized solvent derivatives then specifically participate in the formation of copper silsesquioxane cages, allowing the isolation of several unusual Cu8-based (6 and 7) and Cu6-based (8) complexes. When 1,4-dioxane was applied as a reaction medium, deep rearrangements occurred (with a total elimination of silsesquioxane ligands), causing the formation of mononuclear copper(II) compounds bearing oxidized dioxane fragments (9 and 11) or a formate-driven 1D coordination polymer (10). Finally, a "directed" self-assembly of sil- and germsesquioxanes from copper acetate (or formate) resulted in the corresponding acetate (or formate) containing Cu6 cages (12 and 13) that were isolated in high yields. The structures of all of the products 1-13 were established by single-crystal X-ray diffraction, mainly based on the use of synchrotron radiation. Moreover, the catalytic activity of compounds 12 and 13 was evaluated toward the mild homogeneous oxidation of C5-C8 cycloalkanes with hydrogen peroxide to form a mixture of the corresponding cyclic alcohols and ketones.
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Affiliation(s)
- Grigorii S Astakhov
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences (RAS), Vavilov Strasse 28, Moscow 119991, Russia.,Peoples' Friendship University of Russia, Miklukho-Maklay Street 6, Moscow 117198, Russia
| | - Mikhail M Levitsky
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences (RAS), Vavilov Strasse 28, Moscow 119991, Russia
| | - Yan V Zubavichus
- Boreskov Institute of Catalysis, Siberian Branch of Russian Academy of Sciences (SB RAS) Prosp. Akad., Lavrentieva 5, Novosibirsk 630090, Russia
| | - Victor N Khrustalev
- Peoples' Friendship University of Russia, Miklukho-Maklay Street 6, Moscow 117198, Russia.,Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences (RAS), Leninsky Prospect 47, Moscow 119991, Russia
| | - Aleksei A Titov
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences (RAS), Vavilov Strasse 28, Moscow 119991, Russia
| | - Pavel V Dorovatovskii
- National Research Center "Kurchatov Institute", Akademika Kurchatova pl. 1, Moscow 123182, Russia
| | - Alexander F Smol'yakov
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences (RAS), Vavilov Strasse 28, Moscow 119991, Russia.,Plekhanov Russian University of Economics, Stremyanny per. 36, Moscow 117997, Russia
| | - Elena S Shubina
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences (RAS), Vavilov Strasse 28, Moscow 119991, Russia
| | - Marina V Kirillova
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, Lisbon 1049-001, Portugal
| | - Alexander M Kirillov
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, Lisbon 1049-001, Portugal
| | - Alexey N Bilyachenko
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences (RAS), Vavilov Strasse 28, Moscow 119991, Russia
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19
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Liu Q, Li C, Yao B, Cui Y, Cheng Y, Deng Y, Chen Z, Zhang Y. Self‐Assembly of a Dodecanuclear [Ni
12
] Wheel. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Qi Liu
- Department of Chemistry Southern University of Science and Technology Shenzhen, Guangdong 518055 China
| | - Chang'An Li
- Department of Chemistry Southern University of Science and Technology Shenzhen, Guangdong 518055 China
| | - Binling Yao
- Department of Chemistry Southern University of Science and Technology Shenzhen, Guangdong 518055 China
| | - Yunshu Cui
- Department of Chemistry Southern University of Science and Technology Shenzhen, Guangdong 518055 China
| | - Yue Cheng
- Department of Chemistry Southern University of Science and Technology Shenzhen, Guangdong 518055 China
| | - Yi‐Fei Deng
- Department of Chemistry Southern University of Science and Technology Shenzhen, Guangdong 518055 China
| | - Zi‐Yi Chen
- Department of Chemistry Southern University of Science and Technology Shenzhen, Guangdong 518055 China
| | - Yuan‐Zhu Zhang
- Department of Chemistry Southern University of Science and Technology Shenzhen, Guangdong 518055 China
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20
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Zhu J, Liu B, Zhang W, Jiang J, Li X. Slow magnetic relaxation in mixed-valence coordination polymer, containing Co(III) cluster and Co(II) nodes. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.129934] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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A Mixed Valence Co IICo III2 Field-Supported Single Molecule Magnet: Solvent-Dependent Structural Variation. Molecules 2021; 26:molecules26041060. [PMID: 33670480 PMCID: PMC7922140 DOI: 10.3390/molecules26041060] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 02/10/2021] [Accepted: 02/14/2021] [Indexed: 11/25/2022] Open
Abstract
One-pot reaction of the Schiff base N,N’-ethylene bis(salicylaldimine) (H2L), CoCl2.6H2O, and [Ph2SnCl2] in acetone produces the mixed valence CoIICoIII2 compound [CoIICoIII2(μ-L)2(Ph)2(μ-Cl)2]·(CH3)2CO·H2O (1). Our recent study already revealed that the same reaction mixtures in methanol or ethanol produced a heterometallic SnIVCoIII (2) or monometallic CoIII complex (3), respectively. Comparison of these organometallic systems shows that the 2,1-intermetallic Ph shift occurs in any of those solvents, but their relevant structural features (mononuclear, dinuclear-heterometallic, and trinuclear mixed valence) are solvent dependent. Geometrical structural rotation is also discussed among the related organometallic CoIICoIII2 systems. The AC magnetic susceptibility measurements indicate that 1 is a single molecule magnet (SMM), exhibiting a field-induced slow magnetic relaxation with two modes. The relaxation time for the low-frequency channel is as slow as τ~0.6 s at T = 2.0 K and BDC = 1.0 T.
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22
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Tao Y, Chen YK, Qin HF, Huang R, Li HY, Yao D, Bian HD, Huang FP. Hierarchical Construction and Magnetic Difference of {Co 12M 12} (M = Co 2+/Cd 2+) Aggregates from {Co 14} Cluster-Based Precursors in the Presence of Homo/Heterometal Salts. Inorg Chem 2021; 60:2372-2380. [PMID: 33497206 DOI: 10.1021/acs.inorgchem.0c03253] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The controllable construction and function expansion of some sophisticated aggregations represent a current hot topic in scientific research. In this paper, using a prefabricated {Co14} cluster as a synthetic precursor, a homometallic {Co24} and a heterometallic {Co12Cd12} giant cluster possessing similar dual-[M12] (M = Co/Cd) skeletons was prepared by reacting the precursor with excess CoCl2 and Cd(OAc)2 salts, respectively. The detailed structural information on {Co24} and {Co12Cd12} was characterized by single-crystal X-ray diffraction and further analyzed by X-ray photoelectron spectroscopy, inductively coupled plasma-mass spectroscopy, and scanning electron microscopy with energy dispersive X-ray (EDX) spectroscopy in the solid state. Compared to the {Co14} precursor, magnetic difference revealed that spin-canting and magnetic ordering had been enhanced in {Co24} and suppressed in {Co12Cd12} when dotted with diamagnetic Cd2+ ions.
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Affiliation(s)
- Ye Tao
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmacy, Guangxi Normal University, Guilin 541004, People's Republic of China
| | - Yun-Kai Chen
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmacy, Guangxi Normal University, Guilin 541004, People's Republic of China
| | - Huang-Fei Qin
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmacy, Guangxi Normal University, Guilin 541004, People's Republic of China
| | - Rui Huang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmacy, Guangxi Normal University, Guilin 541004, People's Republic of China
| | - Hai-Ye Li
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmacy, Guangxi Normal University, Guilin 541004, People's Republic of China
| | - Di Yao
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmacy, Guangxi Normal University, Guilin 541004, People's Republic of China
| | - He-Dong Bian
- Key Laboratory of Development and Application of Forest Chemicals of Guangxi, Guangxi University of Nationalities, Nanning 530006, People's Republic of China
| | - Fu-Ping Huang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmacy, Guangxi Normal University, Guilin 541004, People's Republic of China
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23
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Cabrosi D, Cruz C, Paredes-García V, Alborés P. Anisotropic exchange interaction and field-induced SMM behaviour in a mixed valence {CoCo} complex. Dalton Trans 2021; 50:1402-1412. [PMID: 33433551 DOI: 10.1039/d0dt03075a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We are reporting the synthesis and structural characterization of a new hexanuclear Co(ii)/Co(iii) complex starting from a versatile pivalate cobalt precursor and the racemic mixture of a chelating Schiff base type ligand. The main [CoII4CoIII2(μ3-OH)2(μ-OR)2(μ-OR')2(μ-OR'')2]6+ core is unprecedented and exhibits an inversion center that affords only two unique Co(ii) sites. We performed DC and AC magnetic measurements and analysed them in terms of the anisotropic exchange of ground Kramers doublets at each Co(ii) site due to their unquenched angular orbital contribution to the magnetic moment. Quantum computations support the experimental data treatment. The interplay of dominant antiferromagnetic exchange, inversion symmetry and a non-collinear main quantization axis affords an exchange energy spectrum with mostly non-magnetic states. Nevertheless, field induced SMM behaviour is observed at 1500 Oe and below 3 K which might be explained by the relaxation of the first excited magnetic state (which is populated enough) through the next closest excited state. The Orbach and/or Raman mechanism could be operative from the experimental and quantum computed results.
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Affiliation(s)
- Daiana Cabrosi
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE (CONICET), Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina.
| | - Carlos Cruz
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Avenida República 275, Santiago de Chile, Chile and Centro para el Desarrollo de la Nanociencia y Nanotecnología, CEDENNA, Santiago, Chile
| | - Verónica Paredes-García
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Avenida República 275, Santiago de Chile, Chile and Centro para el Desarrollo de la Nanociencia y Nanotecnología, CEDENNA, Santiago, Chile
| | - Pablo Alborés
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE (CONICET), Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina.
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24
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Zhou K, Yan LK, Geng Y, Ji JY, Wang XL, Su ZM, Xiao ZG. The interesting luminescence behavior and rare nonlinear optical properties of the {Ag 55Mo 6} nanocluster. RSC Adv 2021; 11:38814-38819. [PMID: 35493234 PMCID: PMC9044156 DOI: 10.1039/d1ra06569f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 11/30/2021] [Indexed: 11/21/2022] Open
Abstract
The reversible thermochromic luminescence and rare third-order NLO properties of the {Ag55Mo6} nanocluster reported were studied experimentally, and the contributions of Ag+, CC− and MoO42− groups to NLO properties were proved by DFT calculations.
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Affiliation(s)
- Kun Zhou
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, Jilin, China
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, Liaoning, China
| | - Li-Kai Yan
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, Jilin, China
| | - Yun Geng
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, Jilin, China
| | - Jiu-Yu Ji
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, Liaoning, China
| | - Xin-Long Wang
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, Jilin, China
| | - Zhong-Min Su
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, Jilin, China
| | - Zheng-Guo Xiao
- Department of Physics and Electronic Engineering, Tongren University, Tongren 554300, Guizhou, China
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25
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Hamaguchi T, Ono D, Matsuda Y, Kawata S. Synthesis and X-ray crystallography of nonanuclear cobalt cluster and mononuclear cobalt complex: Effect of phosphine on the formation of cobalt complexes. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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26
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Reis Conceição N, Nesterova OV, Rajnák C, Boča R, Pombeiro AJL, Guedes da Silva MFC, Nesterov DS. New members of the polynuclear manganese family: MnMn single-molecule magnets and MnMn antiferromagnetic complexes. Synthesis and magnetostructural correlations. Dalton Trans 2020; 49:13970-13985. [PMID: 32985628 DOI: 10.1039/d0dt02652b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis, crystal structures and magnetic properties are reported for three novel mixed-valence tetranuclear [MnII2MnIII2(HBuDea)2(BuDea)2(EBA)4] (1), [MnII2MnIII2(HBuDea)2(BuDea)2(DMBA)4] (2) and undecanuclear [MnII3MnIII8O4(OH)2(BuDea)6(DMBA)8] (3) clusters, where H2BuDea is N-butyldiethanolamine, HEBA is 2-ethylbutyric acid and HDMBA is 2,2-dimethylbutyric acid. The compounds have been prepared through self-assembly reactions of manganese(ii) chloride with H2BuDea and respective carboxylic acid in methanol solution in air, affording 1 with HEBA, and 2 or 3 with HDMBA, depending on the experimental conditions. The single crystal X-ray analysis reveals that 1 and 2 have similar centrosymmetric structures based on the {M4(μ3-O)2(μ-O)4} core, while 3 discloses the unprecedented {M11(μ-O)4(μ3-O)12} one. The Mn4 complexes display single-molecule magnet (SMM) behavior with a S = 9 spin ground state and a high energy barrier Ueff/kB of up to 51 K. The magnetic properties of 2 are successfully modeled with JMnIII-MnIII/hc = 25.7 cm-1 and two JMnIII-MnII/hc constants of 3.1 and -0.93 cm-1 (data correspond to the Ĥ = -Jŝ1·ŝ2 formalism). The Mn11 cluster exhibits a paramagnetic behavior with dominant antiferromagnetic coupling. A possible influence of intermolecular effects and of different peripheries of the magnetic cores designed by using 2-ethylbutyrate (in 1) or 2,2-dimethylbutyrate (in 2) on the magnetic properties of 1 and 2 is discussed. The experimental magnetostructural correlations for the {MnII2MnIII2(μ3-O)2(μ-O)4} cores, supported by broken symmetry DFT calculations, disclose the X-MnIIIMnIII angle and MnIII-O distance (where MnIII-X and MnIII-O are axial Jahn-Teller bonds) as the structural factors having the strongest influence on JMnIII-MnIII exchange coupling. It is shown that two JMnIII-MnII constants are necessary for the correct description of magnetic exchange couplings in the {MnII2MnIII2(μ3-O)2(μ-O)4} tetranuclear unit.
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Affiliation(s)
- Nuno Reis Conceição
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Oksana V Nesterova
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Cyril Rajnák
- Department of Chemistry, Faculty of Natural Sciences, University of SS Cyril and Methodius, 917 01 Trnava, Slovakia
| | - Roman Boča
- Department of Chemistry, Faculty of Natural Sciences, University of SS Cyril and Methodius, 917 01 Trnava, Slovakia
| | - Armando J L Pombeiro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - M Fátima C Guedes da Silva
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Dmytro S Nesterov
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal. and Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya st., Moscow 117198, Russia
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27
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Cruz C, Vega Carvallo AI, Spodine E, Escuer A, Marco JF, Menéndez N, Venegas-Yazigi D, Paredes-García V. New Highly Charged Iron(III) Metal-Organic Cube Stabilized by a Bulky Amine. ACS OMEGA 2020; 5:22238-22247. [PMID: 32923781 PMCID: PMC7482229 DOI: 10.1021/acsomega.0c02420] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 07/07/2020] [Indexed: 06/11/2023]
Abstract
In this work, we report a new octanuclear cluster based on FeIII and the ligand 1H-imidazole-4,5-dicarboxylic acid, [Et3NH]12[Fe8(IDC)12]·10DMF·13H2O (1), with a metal core containing eight FeIII connected by only one type of organic ligand. A peak at 573 m/z in the mass spectra of the compound suggests the adduct species {[Fe8(IDC)12]+8H}4-. By X-ray photoelectron spectroscopy, the oxidation state of the iron cation was confirmed to be 3+, also identifying the presence of a quaternary nitrogen species, which act as a countercation of the anionic metal core [Fe8(IDC)12]12-. Mössbauer spectra recorded at different temperatures show an isomer shift and quadrupole splitting parameters that confirm the existence of only FeIII-HS in the structure of 1. X-ray analysis reveals that compound 1 crystallizes in the orthorhombic system space group Ibam, confirming a molecular cluster structure with an almost regular cube as geometry, with the FeIII atoms located at the corners of the cube and connected by μ-1κ2 N,O:2κ2 N',O‴-IDC3- bridges. Additionally, the magnetic measurements reveal a weak antiferromagnetic coupling in the Fe8 III coordination cluster (J = -3.8 cm-1). To the best of our knowledge, 1 is the first member of the family of cubes assembled with 1H-imidazole-4,5-dicarboxylic acid and FeIII cation, exhibiting high pH stability over a broad pH range, making it an ideal candidate for the design of supramolecular structures and metal-organic frameworks.
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Affiliation(s)
- Carlos Cruz
- Facultad
de Ciencias Exactas, Departamento de Ciencias Químicas, Universidad Andres Bello, 8370146 Santiago, Chile
- CEDENNA, 8380494 Santiago, Chile
| | - Andrés Igor Vega Carvallo
- Facultad
de Ciencias Exactas, Departamento de Ciencias Químicas, Universidad Andres Bello, 8370146 Santiago, Chile
- CEDENNA, 8380494 Santiago, Chile
| | - Evgenia Spodine
- CEDENNA, 8380494 Santiago, Chile
- Facultad
de Ciencias Químicas y Farmacéuticas, Departamento de
Química Inorgánica y Analítica, Universidad de Chile, 8380492 Santiago, Chile
| | - Albert Escuer
- Departament
de Química Inorgànica, Universitat
de Barcelona, 08028 Barcelona, Spain
| | - José F. Marco
- Instituto
de Química Física Rocasolano, CSIC, 28013 Madrid, Spain
| | - Nieves Menéndez
- Departamento
de Química Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Diego Venegas-Yazigi
- CEDENNA, 8380494 Santiago, Chile
- Facultad
de Química y Biología, Departamento de Química
de los Materiales, Universidad de Santiago
de Chile, 9170022 Santiago, Chile
| | - Verónica Paredes-García
- Facultad
de Ciencias Exactas, Departamento de Ciencias Químicas, Universidad Andres Bello, 8370146 Santiago, Chile
- CEDENNA, 8380494 Santiago, Chile
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28
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Pentanuclear Nickel(II) Complex with two Vertex‐Shared Triaminoguanidine Fragments and Symmetric Capping Ligand. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.202000054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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29
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Xu Y, Wu LN, Li MX, Shi FN, Wang ZX. Syntheses, crystal structures and magnetic properties of two 1D copper complexes with Fe(IV) building block. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.107950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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30
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Gouré E, Gerey B, Molton F, Pécaut J, Clérac R, Thomas F, Fortage J, Collomb MN. Seven Reversible Redox Processes in a Self-Assembled Cobalt Pentanuclear Bis(triple-stranded helicate): Structural, Spectroscopic, and Magnetic Characterizations in the CoICoII4, CoII5, and CoII3CoIII2 Redox States. Inorg Chem 2020; 59:9196-9205. [DOI: 10.1021/acs.inorgchem.0c01102] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eric Gouré
- Univ. Grenoble Alpes, CNRS, DCM, 38000 Grenoble, France
| | | | | | - Jacques Pécaut
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, 38000 Grenoble, France
| | - Rodolphe Clérac
- Univ. Bordeaux, CNRS, Centre de Recherche Paul Pascal, UMR 5031, F-33600 Pessac, France
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31
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Fan K, Xu F, Kurmoo M, Huang XD, Liao CH, Bao SS, Xue F, Zheng LM. Metal–Metalloligand Coordination Polymer Embedding Triangular Cobalt–Oxo Clusters: Solvent- and Temperature-Induced Crystal to Crystal Transformations and Associated Magnetism. Inorg Chem 2020; 59:8935-8945. [DOI: 10.1021/acs.inorgchem.0c00762] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Kun Fan
- 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
| | - Feng Xu
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
- University of Science and Technology of China, Hefei, 230026, People’s Republic of China
| | - Mohamedally Kurmoo
- Institut de Chimie, Université de Strasbourg CNRS-UMR7177, 4 rue Blaise Pascal, Strasbourg Cedex 67007, France
| | - Xin-Da Huang
- 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
| | - Chwen-Haw Liao
- 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
| | - Song-Song Bao
- 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
| | - Fei Xue
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
| | - Li-Min Zheng
- 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
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32
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Fiorini G, Carrella L, Rentschler E, Alborés P. Structural characterization and magnetic property studies of a mixed-valence {Co IIICo} complex with a μ 4-oxo tetrahedral {Co} motif. Dalton Trans 2020; 49:932-940. [PMID: 31868190 DOI: 10.1039/c9dt03561c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We have synthesized and structurally characterized a new mixed valence pentanuclear Co complex, bearing a rare μ4-O-tetrahedral CoII4 unit, by employing a pyridine-like Schiff base ligand. We have performed DC magnetic susceptibility and magnetization measurements over polycrystalline samples and chemical quantum computations in order to understand the exchange interaction pattern within Co(ii) sites and ground state magnetic anisotropy. This new complex shows an overall antiferromagnetic exchange interaction whose strength strongly depends on the local symmetry of Co(ii) sites. Also, local ion magnetic anisotropy reveals a strongly axial behaviour with the lowest Kramers doublet (KD) at each Co(ii) ion sufficiently isolated from excited states at low temperatures. Two Co(ii) sites show tetrahedral symmetry and the spin only formalism including axial zero-field splitting (ZFS) term properly described them; on the other hand, the other two Co(ii) sites have distorted octahedral and square base pyramidal coordination spheres, and a strong orbital contribution leads to a failure of the spin only formalism. A model of four Seff = 1/2 exchange interacting sites is necessary in order to account for low temperature magnetization behaviour. In view of the strongly anisotropic KD states, the exchange interactions are forced to be modelled as anisotropic ones. Overall, experimental data and quantum chemical computations are in good agreement, supporting the proposed model for magnetic behaviour.
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Affiliation(s)
- Guillermo Fiorini
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE (CONICET), Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina.
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33
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Yu YZ, Guo YH, Zhang YR, Tian XJ, Zhang XM. Tetrahedral μ 4-chloride and in situ generated octahedral μ 6-sulfide templating Co 8 complexes with different distortions of the cube. Chem Commun (Camb) 2020; 56:4236-4239. [PMID: 32182322 DOI: 10.1039/d0cc01320j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein two unprecedented octanuclear Co8 clusters are presented, [Cl@Co8 (TEOA)4(CH3CN)Cl3] (1) and [S@Co8(DEOA)6(NCS)2] (2) (H3TEOA = triethanolamine, H2DEOA = diethanolamine), in which tetrahedral μ4-chloride and in situ generated octahedral μ6-sulfide are used as templates. In spite of them being derivatives of cubes, eight Co atoms in 1 consist of two co-centered tetrahedra of different sizes, whereas in 2 they appear as a rhombohedron formed via elongating a cube along the C3-axis direction. Strong intra-cluster antiferromagnetic interactions were found.
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Affiliation(s)
- You-Zhu Yu
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials, Ministry of Education, School of Chemistry & Material Science, Shanxi Normal University, Linfen 041004, P. R. China. and School of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, P. R. China
| | - Yu-Hua Guo
- School of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, P. R. China
| | - Yan-Ru Zhang
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials, Ministry of Education, School of Chemistry & Material Science, Shanxi Normal University, Linfen 041004, P. R. China.
| | - Xiu-Juan Tian
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials, Ministry of Education, School of Chemistry & Material Science, Shanxi Normal University, Linfen 041004, P. R. China.
| | - Xian-Ming Zhang
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials, Ministry of Education, School of Chemistry & Material Science, Shanxi Normal University, Linfen 041004, P. R. China.
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34
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Ma XF, Wang HL, Zhu ZH, Zou HH, Liu B, Wang Z, Ouyang ZW, Liang FP. Solvent-Induced Structural Diversity and Magnetic Research of Two Cobalt(II) Complexes. ACS OMEGA 2019; 4:20905-20910. [PMID: 31867480 PMCID: PMC6921263 DOI: 10.1021/acsomega.9b01781] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Accepted: 09/12/2019] [Indexed: 06/10/2023]
Abstract
The solvent-induced topological and structural diversities of two Co(II) complexes, namely, [Co(L)2(SCN)2] (Co1) and [Co2(L)2(SCN)(OAc)3] (Co2) (L = 8-methoxyquinoline), were comparatively analyzed. Certain proportions of L, Co(OAc)2·4H2O, and NaSCN were mixed and dissolved in CH3OH at 60 °C to obtain complex Co1. Complex Co2, an asymmetric dinuclear compound, was obtained by simply replacing CH3OH with CH3CN as the solvent. The Co(II) ion in complex Co1 was coordinated by the N4O2 mode provided by two L ligands and two SCN- anions. The two Co(II) ions in Co2 were in the N2O4 and NO5 coordination environment and were linked by two μ2-OAc- bridges and one rare μ3-OAc- bridge. Weak interaction analysis revealed that complexes Co1 and Co2 exhibited 6-connected shp and 14-connected fcu nets, respectively. Magnetic studies showed that Co1 demonstrated single-ion magnet behavior under 2000 Oe. These behaviors are indicative of clearly field-induced single-ion magnetic behavior with U eff = 34.7(2) K and τ0 = 2.7(2) × 10-7 s under 2000 Oe dc field, respectively. By contrast, Co2 lacked frequency dependence under zero-field conditions. Electrospray ionization mass spectrometry indicated that two complexes were stable in N,N-dimethylformamide.
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Affiliation(s)
- Xiong-Feng Ma
- State
Key Laboratory for Chemistry and Molecular Engineering of Medicinal
Resources, School of Chemistry & Pharmacy
of Guangxi Normal University, Guilin 541004, P. R. China
| | - Hai-Ling Wang
- State
Key Laboratory for Chemistry and Molecular Engineering of Medicinal
Resources, School of Chemistry & Pharmacy
of Guangxi Normal University, Guilin 541004, P. R. China
| | - Zhong-Hong Zhu
- State
Key Laboratory for Chemistry and Molecular Engineering of Medicinal
Resources, School of Chemistry & Pharmacy
of Guangxi Normal University, Guilin 541004, P. R. China
| | - Hua-Hong Zou
- State
Key Laboratory for Chemistry and Molecular Engineering of Medicinal
Resources, School of Chemistry & Pharmacy
of Guangxi Normal University, Guilin 541004, P. R. China
| | - Bin Liu
- Hubei
Collaborative Innovation Center for Advanced Organic Chemical Materials,
Ministry of Education Key Laboratory for the Synthesis and Application
of Organic Functional Molecules, College of Chemistry and Chemical
Engineering, Hubei University, Wuhan 430062, P. R. China
| | - Zhenxing Wang
- Wuhan
National High Magnetic Field Center & School of Physics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Zhong-Wen Ouyang
- Wuhan
National High Magnetic Field Center & School of Physics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Fu-Pei Liang
- State
Key Laboratory for Chemistry and Molecular Engineering of Medicinal
Resources, School of Chemistry & Pharmacy
of Guangxi Normal University, Guilin 541004, P. R. China
- Guangxi
Key Laboratory of Electrochemical and Magnetochemical Functional Materials,
College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, P. R. China
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35
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Tan Y, Huang J, Lu H, Chi T, Sun J. Synthesis, structure and magnetic property of a copper(II)–cobalt(II) heteronuclear complex with Schiff base ligand. INORG NANO-MET CHEM 2019. [DOI: 10.1080/24701556.2019.1661444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Yuye Tan
- School of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou, P. R. China
| | - Junjie Huang
- School of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou, P. R. China
| | - Hui Lu
- School of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou, P. R. China
| | - Tao Chi
- College of Information Technology, Shanghai Ocean University, Shanghai, P. R. China
- Key Laboratory of Fisheries Information, Ministry of Agriculture, Shanghai, P. R. China
| | - Jianhua Sun
- School of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou, P. R. China
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36
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Sun H, Gao Q, Chhiba S, Chibueze OJ, Li Y. Tetranuclear Zinc and Cobalt Clusters with Dicubane‐Type Topology: Synthesis, Structures, Luminescent and Magnetic Properties. ChemistrySelect 2019. [DOI: 10.1002/slct.201902031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hao Sun
- College of ChemistryChemical Engineering and MaterialsScienceSoochow University Suzhou 215123 China
| | - Qian Gao
- College of ChemistryChemical Engineering and MaterialsScienceSoochow University Suzhou 215123 China
| | - Shahil Chhiba
- Department of Chemical EngineeringUniversity of Waterloo Waterloo, ON N2 L 3G1 Canada
| | - Okolu John Chibueze
- Department of Nanotechnology EngineeringUniversity of Waterloo Waterloo, ON N2 L 3G1 Canada
| | - Yahong Li
- College of ChemistryChemical Engineering and MaterialsScienceSoochow University Suzhou 215123 China
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37
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Efthymiou CG, Mylonas-Margaritis I, Das Gupta S, Tasiopoulos A, Nastopoulos V, Christou G, Perlepes SP, Papatriantafyllopoulou C. Synthesis and characterisation of new Ni2Mn, Ni2Mn2 and Mn8 clusters by the use of 2-pyridyl oximes. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.07.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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38
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Armakola E, Salcedo IR, Bazaga-García M, Olivera-Pastor P, Mezei G, Cabeza A, Fernandes TA, Kirillov AM, Demadis KD. Phosphonate Decomposition-Induced Polyoxomolybdate Dumbbell-Type Cluster Formation: Structural Analysis, Proton Conduction, and Catalytic Sulfoxide Reduction. Inorg Chem 2019; 58:11522-11533. [PMID: 31403791 DOI: 10.1021/acs.inorgchem.9b01376] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction of MoO42- with a number of phosphonic acids [bis(phosphonomethyl)glycine, R,S-hydroxyphosphonoacetic acid, 1-hydroxyethane-1,1-diphosphonic acid, phenylphosphonic acid, aminotris(methylene phosphonic acid), and 1,2-ethylenediphosphonic acid] under oxidizing (H2O2) hydrothermal conditions at low pH leads to rupture of the P-C bond, release of orthophosphate ions, and generation of the octanuclear, phosphate-bridged, polyoxometalate molybdenum cluster (NH4)5[Mo8(OH)2O24(μ8-PO4)](H2O)2 (POMPhos). This cluster has been fully characterized and its structure determined. It was studied as a proton conductor, giving moderate values of σ = 2.13 × 10-5 S·cm-1 (25 °C) and 1.17 × 10-4 S·cm-1 (80 °C) at 95% relative humidity, with Ea = 0.27 eV. The POMPhos cluster was then thermally treated at 310 °C, yielding (NH4)2.6(H3O)0.4(PO4Mo12O36) together with an amorphous impurity containing phosphate and molybdenum oxide. This product was also studied for its proton conductivity properties, giving rise to an impressively high value of σ = 2.43 × 10-3 S·cm-1 (25 °C) and 6.67 × 10-3 S·cm-1 (80 °C) at 95% relative humidity, 2 orders of magnitude higher than those corresponding to the "as-synthesized" solid. The utilization of POMPhos in catalytic reduction of different sulfoxides was also evaluated. POMPhos acts as an efficient homogeneous catalyst for the reduction of diphenyl sulfoxide to diphenyl sulfide, as a model reaction. Pinacol was used as a low-cost, environmentally friendly, and highly efficient reducing agent. The effects of different reaction parameters were investigated, namely the type of solvent and reducing agent, presence of acid promoter, reaction time and temperature, loading of catalyst and pinacol, allowing to achieve up to 84-99% yields of sulfide products under optimized conditions. Substrate scope was tested on the examples of diaryl, alkylaryl, dibenzyl, and dialkyl sulfoxides and excellent product yields were obtained.
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Affiliation(s)
- Eirini Armakola
- Crystal Engineering, Growth and Design Laboratory, Department of Chemistry , University of Crete , Voutes Campus , Heraklion , Crete , GR-71003 , Greece
| | - Inés R Salcedo
- Departamento de Química Inorgánica, Cristalografía y Mineralogía , Universidad de Málaga , Campus Teatinos s/n , Málaga 29071 , Spain
| | - Montse Bazaga-García
- Departamento de Química Inorgánica, Cristalografía y Mineralogía , Universidad de Málaga , Campus Teatinos s/n , Málaga 29071 , Spain
| | - Pascual Olivera-Pastor
- Departamento de Química Inorgánica, Cristalografía y Mineralogía , Universidad de Málaga , Campus Teatinos s/n , Málaga 29071 , Spain
| | - Gellert Mezei
- Department of Chemistry , Western Michigan University , Kalamazoo , Michigan 49008-5413 , United States
| | - Aurelio Cabeza
- Departamento de Química Inorgánica, Cristalografía y Mineralogía , Universidad de Málaga , Campus Teatinos s/n , Málaga 29071 , Spain
| | - Tiago A Fernandes
- Centro de Química Estrutural, Instituto Superior Técnico , Universidade de Lisboa , Av. Rovisco Pais , 1049-001 , Lisbon , Portugal
| | - Alexander M Kirillov
- Centro de Química Estrutural, Instituto Superior Técnico , Universidade de Lisboa , Av. Rovisco Pais , 1049-001 , Lisbon , Portugal.,Research Institute of Chemistry , Peoples' Friendship University of Russia (RUDN University) , 6 Miklukho-Maklaya st., Moscow , 117198 , Russian Federation
| | - Konstantinos D Demadis
- Crystal Engineering, Growth and Design Laboratory, Department of Chemistry , University of Crete , Voutes Campus , Heraklion , Crete , GR-71003 , Greece
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39
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Hu BW, Zhu WQ, Shi WW, Chen P, Li QW, Yin GP. Structural Modulation of Coordination Polymers by Heterometallic Approach. Z Anorg Allg Chem 2019. [DOI: 10.1002/zaac.201900095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Bo-Wen Hu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage; School of Chemistry and Chemical Engineering; Harbin Institute of Technology; 150001 Harbin P. R. China
| | - Wen-Qi Zhu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage; School of Chemistry and Chemical Engineering; Harbin Institute of Technology; 150001 Harbin P. R. China
| | - Wei-Wei Shi
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage; School of Chemistry and Chemical Engineering; Harbin Institute of Technology; 150001 Harbin P. R. China
| | - Peng Chen
- School of Chemistry and Material Science; Heilongjiang University; 150080 Harbin P. R. China
| | - Quan-Wen Li
- College of Chemistry; Nankai University; 300071 Tianjin P. R. China
| | - Ge-Ping Yin
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage; School of Chemistry and Chemical Engineering; Harbin Institute of Technology; 150001 Harbin P. R. China
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40
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New Cu4Na4- and Cu5-Based Phenylsilsesquioxanes. Synthesis via Complexation with 1,10-Phenanthroline, Structures and High Catalytic Activity in Alkane Oxidations with Peroxides in Acetonitrile. Catalysts 2019. [DOI: 10.3390/catal9090701] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Self-assembly of copper(II)phenylsilsesquioxane assisted by the use of 1,10-phenanthroline (phen) results in isolation of two unusual cage-like compounds: (PhSiO1,5)12(CuO)4(NaO0.5)4(phen)4 1 and (PhSiO1,5)6(PhSiO1,5)7(HO0.5)2(CuO)5(O0.25)2(phen)3 2. X-Ray diffraction study revealed extraordinaire molecular architectures of both products. Namely, complex 1 includes single cyclic (PhSiO1,5)12 silsesquioxane ligand. Four sodium ions of 1 are additionally ligated by 1,10-phenanthrolines. In turn, “sodium-less” complex 2 represents coordination of 1,10-phenanthrolines to copper ions. Two silsesquioxane ligands of 2 are: (i) noncondensed cubane of a rare Si6-type and (ii) unprecedented Si7-based ligand including two HOSiO1.5 fragments. These silanol units were formed due to removal of phenyl groups from silicon atoms, observed in mild conditions. The presence of phenanthroline ligands in products 1 and 2 favored the π–π stacking interactions between neighboring cages. Noticeable that in the case of 1 all four phenanthrolines participated in such supramolecular organization, unlike to complex 2 where one of the three phenanthrolines is not “supramolecularly active”. Complexes 1 and 2 were found to be very efficient precatalysts in oxidations with hydroperoxides. A new method for the determination of the participation of hydroxyl radicals has been developed.
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41
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Shi T, Xu Y, Zou YJ, Wang ZX. Synthesis, structure and magnetic properties of copper(ii) azide. Dalton Trans 2019; 48:11186-11190. [PMID: 31273361 DOI: 10.1039/c9dt01450k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel azide-bridged copper compound without an auxiliary ligand has been synthesized and characterized by single-crystal diffraction analysis. The compound consists of 1D double chains with end-on (EO) azide bridges. Furthermore, the neighboring chains are connected by weak coordination bonds, which leads to the formation of a 3D architecture. Low-temperature magnetic measurements reveal that antiferromagnetic interactions are dominant, with concomitant spin-canted antiferromagnetism.
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Affiliation(s)
- Taqing Shi
- School of Pharmacy, Guangdong Medical University, Dongguan 523800, People's Republic of China
| | - Ye Xu
- Department of Chemistry, Centre for Supramolecular Chemistry and Catalysis, Innovative Drug Research Centre, Shanghai University, Shanghai 200444, People's Republic of China.
| | - Ya-Jing Zou
- Department of Chemistry, Centre for Supramolecular Chemistry and Catalysis, Innovative Drug Research Centre, Shanghai University, Shanghai 200444, People's Republic of China.
| | - Zhao-Xi Wang
- Department of Chemistry, Centre for Supramolecular Chemistry and Catalysis, Innovative Drug Research Centre, Shanghai University, Shanghai 200444, People's Republic of China.
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42
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Lang WJ, Kurmoo M, Zeng MH. A Chiral and Polar Single-Molecule Magnet: Synthesis, Structure, and Tracking of Its Formation Using Mass Spectrometry. Inorg Chem 2019; 58:7236-7242. [PMID: 31091083 DOI: 10.1021/acs.inorgchem.9b00269] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The solvothermal reaction of cobalt(II) sulfate with S, S-1,2- bis(1-methyl-1 H-benzo[ d]imidazol-2-yl)ethane-1,2-diol, (H2L), neutralized with triethylamine (Et3N) in a mixture of methanol and water (2:1), resulted in triangular red crystals of [CoII7(L)3(SO4)3(OH)2(H2O)9]·4H2O·3CH3OH (Co7). It is formed of chiral and polar clusters crystallizing in the R3 space group. Co7 consists of apex-shared asymmetric dicubane units where all of the metals adopt an octahedral coordination and the three ligands wrap diagonally around the unit. One end of the cluster is bonded by six water molecules and the other end by three monodentate sulfates. The head-to-tail packing through extended H-bonds leads to polar chains. The ligand has lost two protons, adopts a cis-conformation, and is coordinated to five metals around the waist of the dicubane. Electrospray ionization mass spectrometry (ESI-MS) of solutions of the reaction as a function of time reveals the possible step-by-step assembly process of the cluster: the initial product [CoII(HL)(SO4)]2- combines with CoSO4, forming [CoII2(HL)(SO4)2]2-, and then, upon addition of Et3N, dimerizes through a [OH]- bridge to [CoII4(HL)2(OH)(CH3OH)2(SO4)3]- followed by capture of one Co2+ and one CoSO4 to form [CoII6(L)2(OH)(CH3O)(SO4)4]2- before eventually binding to CoL to form [CoII7(L)3(OH)2(SO4)4]2-. These results allow us to propose a possible process for the formation of Co7, which is a good example for chiral multidentate chelating ligand-controlled assembly of clusters. Magnetization measurements as a function of the temperature, field, and ac-frequency reveal ferromagnetic coupled moments and single-molecule magnetism (SMM).
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Affiliation(s)
- Wen-Jing Lang
- Department of Chemistry and Pharmaceutical Sciences, Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources , Guangxi Normal University , Guilin , 541004 , P. R. China
| | - Mohamedally Kurmoo
- Institut de Chimie de Strasbourg, CNRS-UMR7177 , Université de Strasbourg , 4 rue Blaise Pascal , 67070 Strasbourg Cedex , France
| | - Ming-Hua Zeng
- Department of Chemistry and Pharmaceutical Sciences, Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources , Guangxi Normal University , Guilin , 541004 , P. R. China.,Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry & Chemical Engineering , Hubei University , Wuhan , 430062 , P. R. China
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Chen M, Zhang M, Wang X, Bi Y, Chen B, Zheng Z. Thiacalixarene-Supported Irregular Co 26 and Ni 28 High-Nuclearity Clusters with Pyridyl-Diphosphonates: Strategies to Create Active Metal Sites and Fabricate Multicomponent Materials. Inorg Chem 2019; 58:6276-6282. [PMID: 30990033 DOI: 10.1021/acs.inorgchem.9b00495] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two new irregularity high-nuclearity clusters [Co26(TC4A)6(HL)4Cl4(HCOO)4(CH3O)2(OH)2(DMF)10(H2O)5] (+ solvent) (Co26) and [Ni28(TC4A)6(HL)6(PO4)2(μ3-O)2Cl2(CH3OH)14(H2O)2(DMF)8][(CH3NH2CH3)4] (+ solvent) (Ni28) have been solvothermally synthesized by p- tert-butylthiacalix[4]arene (H4TC4A), transition metals (CoCl2·6H2O/NiCl2·6H2O), and 1-hydroxy-2-(3-pyridinyl)ethylidene-1,1-diphosphonic acid (H5L). The clusters were structurally characterized by single crystal X-ray diffraction, PXRD, TGA, and FT-IR spectrum and Raman spectrum. Co26 features a rodlike Co26 core constructed by six Co4-TC4A secondary building units (SBUs) and four HL4- with two extra cobalt ions. Ni28 cluster represents a flowerlike Ni28 core built from six Ni4-TC4A SBUs, six HL4-, and four additional nickel ions. The multidentate risedronic acid displaying various new coordination mode bonds with SBUs to assemble two nanoclusters that enable high density possible coordinatively unsaturated metal sites (PCUMSs). Co26 and Ni28 clusters can be directly dispersed on carbon paper (CP) and showed extraordinary oxygen evolution reaction (OER) activity due to the larger exposed liable coordination active metal sites. The thermodecomposition of both nanoclusters at different temperatures afforded serial multicomponent complexes.
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Affiliation(s)
- Mengwei Chen
- College of Chemistry, Chemical Engineering and Environmental Engineering , Liaoning Shihua University , Fushun , 113001 , P. R. China
| | - Min Zhang
- College of Chemistry, Chemical Engineering and Environmental Engineering , Liaoning Shihua University , Fushun , 113001 , P. R. China
| | - Xin Wang
- College of Chemistry, Chemical Engineering and Environmental Engineering , Liaoning Shihua University , Fushun , 113001 , P. R. China
| | - Yanfeng Bi
- College of Chemistry, Chemical Engineering and Environmental Engineering , Liaoning Shihua University , Fushun , 113001 , P. R. China
| | - Baokuan Chen
- College of Chemistry, Chemical Engineering and Environmental Engineering , Liaoning Shihua University , Fushun , 113001 , P. R. China
| | - Zhiping Zheng
- College of Chemistry, Chemical Engineering and Environmental Engineering , Liaoning Shihua University , Fushun , 113001 , P. R. China.,Shenzhen Grubbs Institute and Department of Chemistry , Southern University of Science and Technology , Shenzhen , Guangdong 518000 , P. R. China
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Wang M, Gou X, Shi W, Cheng P. Single-chain magnets assembled in cobalt(ii) metal–organic frameworks. Chem Commun (Camb) 2019; 55:11000-11012. [DOI: 10.1039/c9cc03781k] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
This feature article discusses the advantages, progress and prospects of constructing single-chain magnets in metal–organic frameworks.
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Affiliation(s)
- Mengmeng Wang
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Xiaoshuang Gou
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Wei Shi
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Peng Cheng
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
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Geng D, Han X, Bi Y, Qin Y, Li Q, Huang L, Zhou K, Song L, Zheng Z. Merohedral icosahedral M 48 (M = Co II, Ni II) cage clusters supported by thiacalix[4]arene. Chem Sci 2018; 9:8535-8541. [PMID: 30568777 PMCID: PMC6251337 DOI: 10.1039/c8sc03193b] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 09/12/2018] [Indexed: 11/21/2022] Open
Abstract
Cage clusters are a discrete chemically and topologically diverse family of molecule-based functional materials. Presented here are two isostructural M48 (M = CoII for LSHU01, NiII for LSHU02) cage clusters with a merohedral icosahedral cage structure featuring 12 M4-TC4A (H4TC4A, p-tert-butylthiacalix[4]arene) second building units as vertices and 18 asymmetric 5-(1H-tetrazol-1-yl)isophthalate ligands as faces. They are the highest-nuclearity cage compounds of CoII and NiII. The activated Co48 cage exhibited high selectivity in the sorption of C3H8 over CH4 under ambient conditions. Frequency response experiments indicated that the extrinsic voids and matrix interface of the activated crystalline samples are primarily responsible for the observed gas adsorption performance.
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Affiliation(s)
- Dantong Geng
- College of Chemistry , Chemical Engineering and Environmental Engineering , Liaoning Shihua University , Fushun 113001 , P. R. China . ;
| | - Xu Han
- College of Chemistry , Chemical Engineering and Environmental Engineering , Liaoning Shihua University , Fushun 113001 , P. R. China . ;
| | - Yanfeng Bi
- College of Chemistry , Chemical Engineering and Environmental Engineering , Liaoning Shihua University , Fushun 113001 , P. R. China . ;
| | - Yucai Qin
- College of Chemistry , Chemical Engineering and Environmental Engineering , Liaoning Shihua University , Fushun 113001 , P. R. China . ;
| | - Qiang Li
- College of Chemistry , Chemical Engineering and Environmental Engineering , Liaoning Shihua University , Fushun 113001 , P. R. China . ;
| | - Liangliang Huang
- College of Chemistry , Chemical Engineering and Environmental Engineering , Liaoning Shihua University , Fushun 113001 , P. R. China . ;
| | - Kun Zhou
- College of Chemistry , Chemical Engineering and Environmental Engineering , Liaoning Shihua University , Fushun 113001 , P. R. China . ;
| | - Lijuan Song
- College of Chemistry , Chemical Engineering and Environmental Engineering , Liaoning Shihua University , Fushun 113001 , P. R. China . ;
| | - Zhiping Zheng
- College of Chemistry , Chemical Engineering and Environmental Engineering , Liaoning Shihua University , Fushun 113001 , P. R. China . ;
- Shenzhen Grubbs Institute and Department of Chemistry , Southern University of Science and Technology , Shenzhen , Guangdong 518000 , China .
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Pakula RJ, Berry JF. Cobalt complexes of the chelating dicarboxylate ligand "esp": a paddlewheel-type dimer and a heptanuclear coordination cluster. Dalton Trans 2018; 47:13887-13893. [PMID: 30225479 PMCID: PMC6774636 DOI: 10.1039/c8dt03030h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The coordination chemistry of Co(ii) with the chelating dicarboxylate ligand esp (esp = α,α,α',α'-tetramethyl-1,3-benzenedipropionate) is explored. We report here the bimetallic paddlewheel-type dimer, Co2(esp)2(EtOH)2 (1), and a bowl-shaped, heptanuclear coordination cluster, Co7(OH)4(Hesp)2(esp)4(MeCN)2·4MeCN (2). Crystal structures of both complexes are reported as well as their magnetic properties, which indicate antiferromagnetic interactions among the Co(ii) ions.
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Affiliation(s)
- Ryan J Pakula
- Department of Chemistry, University of Wisconsin - Madison, 1101 University Ave., Madison, WI 53706, USA.
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Maniaki D, Pilichos E, Perlepes SP. Coordination Clusters of 3d-Metals That Behave as Single-Molecule Magnets (SMMs): Synthetic Routes and Strategies. Front Chem 2018; 6:461. [PMID: 30356793 PMCID: PMC6190736 DOI: 10.3389/fchem.2018.00461] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 09/14/2018] [Indexed: 11/18/2022] Open
Abstract
The area of 3d-metal coordination clusters that behave as Single-Molecule Magnets (SMMs) is now quite mature within the interdisciplinary field of Molecular Magnetism. This area has created a renaissance in Inorganic Chemistry. From the synthetic Inorganic Chemistry viewpoint, the early years of "try and see" exercises (1993-2000) have been followed by the development of strategies and strict approaches. Our review will first summarize the early synthetic efforts and routes for the preparation of polynuclear 3d-metal SMMs, and it will be then concentrated on the description of the existing strategies. The former involve the combination of appropriate 3d-metal-containing starting materials (simple salts with inorganic anions, metal cardoxylates, and pre-formed carboxylate clusters, metal phosphonates) and one or two primary organic ligands; the importance of the end-on azido group as a ferromagnetic coupler in 3d-metal SMM chemistry will be discussed. The utility of comproportionation reactions and the reductive aggregation route for the construction of manganese SMMs will also be described. Most of the existing strategies for the synthesis of SMMs concern manganese. These involve substitution of carboxylate ligands in pre-formed SMMs by other carboxylate or non-carboxylate groups, reduction procedures for the {Mn 8 III Mn 4 IV } SMMs, spin "tweaking," "switching on" SMM properties upon conversion of low-spin clusters into high-spin ones, ground-state spin switching and enhancing SMM properties via targeted structural distortions, the use of radical bridging ligands and supramolecular approaches. A very useful strategy is also the "switching on" of SMM behavior through replacement of bridging hydroxide groups by end-on azido or isocyanato ligands in clusters. Selected examples will be mentioned and critically discussed. Particular emphasis will be given on the criteria for the choice of ligands.
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Cai ZS, Hoshino N, Bao SS, Jia J, Akutagawa T, Zheng LM. Dynamic Motion of Organic Ligands in Polar Layered Cobalt Phosphonates. Chemistry 2018; 24:13495-13503. [PMID: 29947086 DOI: 10.1002/chem.201801301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 06/21/2018] [Indexed: 11/11/2022]
Abstract
By introducing the polar methoxy group into phenyl- or benzyl-phosphonate ligands, four cobalt phosphonates with layered structures are obtained, namely, [Co(4-mopp)(H2 O)] (1), [Co(4-mobp)(H2 O)] (2), [Co(3-mopp)(H2 O)] (3), and [Co(3-mobp)(H2 O)] (4), where 4- or 3-moppH2 is (4- or 3-methoxyphenyl)phosphonic acid and 4- or 3-mobpH2 is (4- or 3-methoxybenzyl)phosphonic acid. Compounds 1, 2, and 4 crystallize in the polar space groups Pmn21 or Pna21 , whereas compound 3 crystallizes in the centrosymmetric space group P21 /n. The layer topologies in the four structures are similar and can be viewed as perovskite type, where the edge-sharing [Co4 O4 ] rhombi are capped by the PO3 C groups. The phenyl and MeO groups in compounds 1-3 are heavily disordered, whereas that in 4 is ordered. Structural comparison based on the data at 296 and 123 K reveals distinct dynamic motion of the organic groups in compounds 1 and 2. The fluctuation of the polar MeO groups in these two compounds is confirmed by dielectric relaxation measurements. In contrast, the fluctuation of polar groups in compounds 3 and 4 is not evident. Interestingly, the dehydrated samples of 3 and 4 (i.e., 3-de and 4-de) exhibit one-step and two-step phase transitions associated with the motion of polar organic groups, as proven by DSC and dielectric measurements. The magnetic properties of compounds 1-4 are investigated, and strong antiferromagnetic interactions are found to mediate between the magnetic centers through μ-O(P) and O-P-O bridges.
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Affiliation(s)
- Zhong-Sheng Cai
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
| | - Norihisa Hoshino
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8577, Japan
| | - Song-Song Bao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
| | - Jiage Jia
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
| | - Tomoyuki Akutagawa
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8577, Japan
| | - Li-Min Zheng
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
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Shi C, Zhang M, Hang X, Bi Y, Huang L, Zhou K, Xu Z, Zheng Z. Assembly of thiacalix[4]arene-supported high-nuclearity Cd24 cluster with enhanced photocatalytic activity. NANOSCALE 2018; 10:14448-14454. [PMID: 30043025 DOI: 10.1039/c8nr03474e] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A high-nuclearity nanoscale Cd24 cluster has been hydrothermally synthesized by assembly of Cd4-TC4A (H4TC4A = p-tert-butylthiacalix[4]arene) second building units (SBUs) and in situ generated peroxy(mono)phosphate PO53- groups and peroxyphenoxide groups of TC4A. The cluster was structurally characterized by single crystal X-ray diffractions. Photocatalytic studies revealed that the highest nuclearity Cd,S-co-rich Cd24 cluster exhibits enhanced photocatalytic water splitting activities compared to the sandwich Cd4(TC4A)2 (Cd4) cluster under the same conditions in the absence of a co-catalyst. The nanostructure of Cd24 incorporated both peroxyphosphate and peroxyphenoxide groups, which increased the metal coordination numbers to give more labile Cd-O/S bonds and is believed to be the key feature that enables the significant photocatalytic water splitting activities.
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Affiliation(s)
- Cheng Shi
- College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun 113001, P. R. China.
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Aguilà D, Jeannin O, Fourmigué M, Jeon IR. Mn III-Fe III Heterometallic Compounds within Hydrogen-Bonded Supramolecular Networks Promoted by an [Fe(CN) 5(CNH)] 2- Building Block: Structural and Magnetic Properties. Inorg Chem 2018; 57:7892-7903. [PMID: 29894171 DOI: 10.1021/acs.inorgchem.8b00983] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction of [Fe(CN)6]3- and [Mn(acacen)]+ (H2acacen = N, N'-bis(acetylacetone)ethylenediamine) building units in the presence of supramolecular cations, [(F-Anil)(18-crown-6)]+ (F-Anil+ = 3-fluoroanilinium) or [(Me-F-Anil)(18-crown-6)]+ (Me-F-Anil+ = 3-fluoro-4-methylanilinium), affords two new bimetallic compounds, [(F-Anil)(18-crown-6)][Mn(acacen)Fe(CN)5(CNH)]·MeOH (1) and [(Me-F-Anil)(18-crown-6)][Mn(acacen)(MeOH)Fe(CN)5(CNH)]·MeOH (2), respectively. Compound 1 exhibits a one-dimensional topology, while compound 2 is a dinuclear discrete system due to the coordination of a MeOH molecule at the axial position of the [Mn(acacen)]- unit. For both systems, the acidity of the corresponding supramolecular cation triggers the protonation of the FeIII moiety as [Fe(CN)5(CNH)]2-. Moreover, the resulting -CNH ligand induces hydrogen bonding interactions connecting the chains for 1 or the molecules for 2 into higher dimensional supramolecular networks. Magnetic properties of compounds incorporating these [Fe(CN)5(CNH)]2- building blocks were, for the first time, thoroughly investigated, indicating a three-dimensional antiferromagnetic order of single-chain magnets for 1 and an antiferromagnetically interacting S = 3/2 spin ground state for 2.
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Affiliation(s)
- David Aguilà
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226 , 35000 Rennes , France
| | - Olivier Jeannin
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226 , 35000 Rennes , France
| | - Marc Fourmigué
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226 , 35000 Rennes , France
| | - Ie-Rang Jeon
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226 , 35000 Rennes , France
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