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Manohar EM, Dhandapani HN, Roy S, Pełka R, Rams M, Konieczny P, Tothadi S, Kundu S, Dey A, Das S. Tetranuclear Co II4O 4 Cubane Complex: Effective Catalyst Toward Electrochemical Water Oxidation. Inorg Chem 2024; 63:4883-4897. [PMID: 38494956 DOI: 10.1021/acs.inorgchem.3c03956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
The reaction of Co(OAc)2·6H2O with 2,2'-[{(1E,1'E)-pyridine-2,6-diyl-bis(methaneylylidene)bis(azaneylylidene)}diphenol](LH2) a multisite coordination ligand and Et3N in a 1:2:3 stoichiometric ratio forms a tetranuclear complex Co4(L)2(μ-η1:η1-OAc)2(η2-OAc)2]· 1.5 CH3OH· 1.5 CHCl3 (1). Based on X-ray diffraction investigations, complex 1 comprises a distorted Co4O4 cubane core consisting of two completely deprotonated ligands [L]2- and four acetate ligands. Two distinct types of CoII centers exist in the complex, where the Co(2) center has a distorted octahedral geometry; alternatively, Co(1) has a distorted pentagonal-bipyramidal geometry. Analysis of magnetic data in 1 shows predominant antiferromagnetic coupling (J = -2.1 cm-1), while the magnetic anisotropy is the easy-plane type (D1 = 8.8, D2 = 0.76 cm-1). Furthermore, complex 1 demonstrates an electrochemical oxygen evolution reaction (OER) with an overpotential of 325 mV and Tafel slope of 85 mV dec-1, required to attain a current density of 10 mA cm-2 and moderate stability under alkaline conditions (pH = 14). Electrochemical impedance spectroscopy studies reveal that compound 1 has a charge transfer resistance (Rct) of 2.927 Ω, which is comparatively lower than standard Co3O4 (5.242 Ω), indicating rapid charge transfer kinetics between electrode and electrolyte solution that enhances higher catalytic activity toward OER kinetics.
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Affiliation(s)
- Ezhava Manu Manohar
- Department of Basic Sciences, Chemistry Discipline, Institute of Infrastructure, Technology, Research, and Management, Near Khokhra Circle, Maninagar East, Ahmedabad, Gujarat 380026, India
| | - Hariharan N Dhandapani
- Electrochemical Process Engineering (EPE) Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi, Tamil Nadu 630003, India
| | - Soumalya Roy
- Department of Basic Sciences, Chemistry Discipline, Institute of Infrastructure, Technology, Research, and Management, Near Khokhra Circle, Maninagar East, Ahmedabad, Gujarat 380026, India
| | - Robert Pełka
- Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, Krakow PL-31342, Poland
| | - Michał Rams
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, Kraków 30348, Poland
| | - Piotr Konieczny
- Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, Krakow PL-31342, Poland
| | - Srinu Tothadi
- Analytical and Environmental Sciences Division and Centralized Instrumentation Facility, CSIR-Central Salt and Marine Chemicals Research Institute, Gijubhai Badheka Marg, Bhavnagar 364002, India
| | - Subrata Kundu
- Electrochemical Process Engineering (EPE) Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi, Tamil Nadu 630003, India
| | - Atanu Dey
- Department of Chemistry, Gandhi Institute of Technology and Management (GITAM), NH 207, Nagadenehalli, Doddaballapur Taluk, Bengaluru, Karnataka 561203, India
| | - Sourav Das
- Department of Basic Sciences, Chemistry Discipline, Institute of Infrastructure, Technology, Research, and Management, Near Khokhra Circle, Maninagar East, Ahmedabad, Gujarat 380026, India
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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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3
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Ressler AJ, Brandt ON, Weaver A, Poor JE, Ream A, Summers NA, McMillen CD, Seeram NP, Dougherty WG, Henry GE. Chromene-based Schiff Base Ligand: DNA Interaction Studies and Characterization of Tetranuclear Zinc, Nickel and Iron Complexes. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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4
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Liu M, Yang Y, Jing R, Zheng S, Yuan A, Wang Z, Luo SC, Liu X, Cui HH, Ouyang ZW, Chen L. Slow magnetic relaxation in dinuclear Co(III)-Co(II) complexes containing a five-coordinated Co(II) centre with easy-axis anisotropy. Dalton Trans 2022; 51:8382-8389. [PMID: 35587605 DOI: 10.1039/d2dt00857b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Two air-stable Co(III)-Co(II) mixed-valence complexes of molecular formulas [CoIICoIII(L)(DMAP)3(CH3COO)]·H2O·CH3OH (1) and [CoIICoIII(L)(4-Pyrrol)3 (CH3COO)]·0.5CH2Cl2 (2) (H4L = 1,3-bis-(5-methyl pyrazole-3-carboxamide) propane; DMAP = 4-dimethylaminopyridine; and 4-Pyrrol = 4-pyrrolidinopyridine) were synthesized and characterized by single-crystal X-ray crystallography, high-field electron paramagnetic resonance (HFEPR) spectroscopy, and magnetic measurements. Both complexes possess one five-coordinated paramagnetic Co(II) ion and one six-coordinated Co(III) ion with octahedral geometry. Direct-current magnetic susceptibility and magnetization measurements show the easy-axis magnetic anisotropy that is also confirmed by low-temperature HFEPR measurements and theoretical calculations. Frequency- and temperature-dependent alternating-current magnetic susceptibility measurements reveal their field-assisted slow magnetic relaxation, which is a characteristic behavior of single-molecule magnets (SMMs), caused by the individual Co(II) ion. The effective energy barrier of complex 1 (49.2 cm-1) is significantly higher than those of the other dinuclear Co(III)-Co(II) SMMs. This work hence presents the first instance of the dinuclear Co(III)-Co(II) single-molecule magnets with a five-coordinated environment around the Co(II) ion.
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Affiliation(s)
- Mengyao Liu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P. R. China.
| | - Yimou Yang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P. R. China.
| | - Rong Jing
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P. R. China.
| | - Shaojun Zheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P. R. China.
| | - Aihua Yuan
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, 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.
| | - Shu-Chang Luo
- School of Chemical Engineering, Guizhou University of Engineering Science, Bijie 551700, P. R. China.
| | - Xiangyu Liu
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, P. R. China.
| | - Hui-Hui Cui
- School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, 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.
| | - Lei Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P. R. China.
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Song KY, Yang ZC, Zhou PK, Zong LL, Li HH, Jiang R, Chen ZR. Photo-sensitive hybrids constructed from diphenyliodonium and metal-thiocyanates: photo-induced structure and property transformations. CrystEngComm 2022. [DOI: 10.1039/d1ce01585k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
New hybrids constructed from diphenyliodonium and metal thiocyanates have been prepared, and their photo-induced structural transformations and corresponding color/fluorescence/magnetism variations have been investigated.
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Affiliation(s)
- Kai-Yue Song
- College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, P. R. China
| | - Zhen-Cong Yang
- College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, P. R. China
| | - Pan-Ke Zhou
- College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, P. R. China
| | - Lu-Lu Zong
- College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, P. R. China
| | - Hao-Hong Li
- College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, P. R. China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, P. R. China
| | - Rong Jiang
- College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, P. R. China
| | - Zhi-Rong Chen
- College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, P. R. China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, P. R. China
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Wang HS, Zhang K, Song Y, Pan ZQ. Recent advances in 3d-4f magnetic complexes with several types of non-carboxylate organic ligands. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120318] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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7
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Kulakova A, Bilyachenko A, Korlyukov A, Levitsky M, Long J, Guari Y, Larionova J. Novel carbonate/pyridine tetranuclear nickel complex, exhibiting slow relaxation of the magnetization. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121815] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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A new series of Schiff base Ni(II)4 cubanes: Evaluation of magnetic coupling via carboxylate bridges. Polyhedron 2021. [DOI: 10.1016/j.poly.2020.115017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Wu Y, Xi J, Xiao T, Ferrando-Soria J, Ouyang Z, Wang Z, Luo S, Liu X, Pardo E. Switching of easy-axis to easy-plane anisotropy in cobalt( ii) complexes. Inorg Chem Front 2021. [DOI: 10.1039/d1qi01208h] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In situ microcalorimetry monitored assembly and coligand induced switching of the magnetic anisotropy sign have been observed in a β-diketonate-Co(ii) system.
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Affiliation(s)
- Yuewei Wu
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
| | - Jing Xi
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
| | - Tongtong Xiao
- Wuhan National High Magnetic Field Center & School of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Jesús Ferrando-Soria
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular (ICMOL), Universidad de Valencia, Paterna 46980, Valencia, Spain
| | - Zhongwen Ouyang
- Wuhan National High Magnetic Field Center & School of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Zhenxing Wang
- Wuhan National High Magnetic Field Center & School of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Shuchang Luo
- College of Chemical Engineering, Guizhou University of Engineering Science, Bijie 551700, China
| | - Xiangyu Liu
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
- China State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, 210023, China
| | - Emilio Pardo
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular (ICMOL), Universidad de Valencia, Paterna 46980, Valencia, Spain
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He YC, Wang Y, Zhao FH, Wang YC, Wang KX, Yang HK, Xu N. Syntheses, structures and properties of two Ni(II) coordination polymers based on an anionic ligand deprotonated 5-((3-carboxyphenoxy)methyl)benzene-1,3-dioic acid and different neutral ligands. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119930] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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11
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Tandon SS, Patel N, Bunge SD, Wang EC, Thompson R, Thompson LK. One-Pot Self-Assembly of Dinuclear, Tetranuclear, and H-Bonding-Directed Polynuclear Cobalt(II), Cobalt(III), and Mixed-Valence Co(II)/Co(III) Complexes of Schiff Base Ligands with Incomplete Double Cubane Core. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E5425. [PMID: 33260611 PMCID: PMC7730246 DOI: 10.3390/ma13235425] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Revised: 11/24/2020] [Accepted: 11/25/2020] [Indexed: 11/16/2022]
Abstract
The reaction of 2,6-diformyl-4-methylphenol (DFMF) with 1-amino-2-propanol (AP) and tris(hydroxymethyl)aminomethane (THMAM) was investigated in the presence of Cobalt(II) salts, (X = ClO4-, CH3CO2-, Cl-, NO3-), sodium azide (NaN3), and triethylamine (TEA). In one pot, the variation in Cobalt(II) salt results in the self-assembly of dinuclear, tetranuclear, and H-bonding-directed polynuclear coordination complexes of Cobalt(III), Cobalt(II), and mixed-valence CoIICoIII: [Co2III(H2L-1)2(AP-1)(N3)](ClO4)2 (1), [Co4(H2L-1)2(µ3-1,1,1-N3)2(µ-1,1-N3)2Cl2(CH3OH)2]·4CH3OH (2), [Co2IICo2III(HL-2)2(µ-CH3CO2)2(µ3-OH)2](NO3)2·2CH3CH2OH (3), and [Co2IICo2III (H2L12-)2(THMAM-1)2](NO3)4 (4). In 1, two cobalt(III) ions are connected via three single atom bridges; two from deprotonated ethanolic oxygen atoms in the side arms of the ligands and one from the1-amino-2-propanol moiety forming a dinuclear unit with a very short (2.5430(11) Å) Co-Co intermetallic separation with a coordination number of 7, a rare feature for cobalt(III). In 2, two cobalt(II) ions in a dinuclear unit are bridged through phenoxide O and μ3-1,1,1-N3 azido bridges, and the two dinuclear units are interconnected by two μ-1,1-N3 and two μ3-1,1,1-N3 azido bridges generating tetranuclear cationic [Co4(H2L-1)2(µ3-1,1,1-N3)2(µ-1,1-N3)2Cl2(CH3OH)2]2+ units with an incomplete double cubane core, which grow into polynuclear 1D-single chains along the a-axis through H-bonding. In 3, HL2- holds mixed-valent Co(II)/Co(III) ions in a dinuclear unit bridged via phenoxide O, μ-1,3-CH3CO2-, and μ3-OH- bridges, and the dinuclear units are interconnected through two deprotonated ethanolic O in the side arms of the ligands and two μ3-OH- bridges generating cationic tetranuclear [Co2IICo2III(HL-2)2(µ-CH3CO2)2(µ3-OH)2]2+ units with an incomplete double cubane core. In 4, H2L1-2 holds mixed-valent Co(II)/Co(III) ions in dinuclear units which dimerize through two ethanolic O (μ-RO-) in the side arms of the ligands and two ethanolic O (μ3-RO-) of THMAM bridges producing centrosymmetric cationic tetranuclear [Co2IICo2III (H2L1-2)2(THMAM-1)2]4+ units which grow into 2D-sheets along the bc-axis through a network of H-bonding. Bulk magnetization measurements on 2 demonstrate that the magnetic interactions are completely dominated by an overall ferromagnetic coupling occurring between Co(II) ions.
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Affiliation(s)
- Santokh S. Tandon
- Department of Chemistry and Biochemistry, Kent State University - Salem Campus, Salem, OH 44460, USA
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44242, USA; (N.P.); (S.D.B.); (E.C.W.); (R.T.)
| | - Neil Patel
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44242, USA; (N.P.); (S.D.B.); (E.C.W.); (R.T.)
| | - Scott D. Bunge
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44242, USA; (N.P.); (S.D.B.); (E.C.W.); (R.T.)
| | - Esther C. Wang
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44242, USA; (N.P.); (S.D.B.); (E.C.W.); (R.T.)
| | - Rachel Thompson
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44242, USA; (N.P.); (S.D.B.); (E.C.W.); (R.T.)
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12
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Yi XG, Lai FP, Yan YY, Zhang C, Li WP. Preparation, crystal structures, properties, and time-dependent density functional theory of two cobalt complexes with 3-hydroxy-2-methyl-quinoline-4-carboxylate. JOURNAL OF CHEMICAL RESEARCH 2020. [DOI: 10.1177/1747519820948363] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
One organic compound [HMCA]2 (1) and two novel cobalt complexes [Co(MCA)(bipy)(H2O)]·(H2O) (2), [Co2(MCA)2(Phen)3]·3(H2O) (3) are synthesized by a solvothermal approach and are structurally determined by single-crystal X-ray diffraction. Compound 1 exhibits a two-dimensional structure by hydrogen bond and π. . .π stacking interaction. The complexes exhibit a three-dimensional and one-dimensional metal-organic framework. Solid-state photoluminescence spectrums reveal that they show blue emission bands at 449 nm, and theoretical calculation results of time-dependent density functional theory show that all belong to ligand-to-ligand charge transfer. Solid-state diffuse reflectance spectrums reveal the presence of a narrow optical band gap of 1.72 and 1.60 eV in the complexes 2 and 3, respectively.
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Affiliation(s)
- Xiu-Guang Yi
- School of Chemistry and Chemical Engineering, Jinggangshan University, Ji’an, P.R. China
| | - Fei-Ping Lai
- School of Chemistry and Chemical Engineering, Jinggangshan University, Ji’an, P.R. China
| | - Yun-Yi Yan
- School of Chemistry and Chemical Engineering, Jinggangshan University, Ji’an, P.R. China
| | - Cong Zhang
- School of Chemistry and Chemical Engineering, Jinggangshan University, Ji’an, P.R. China
| | - Wen-Ping Li
- School of Chemistry and Chemical Engineering, Jinggangshan University, Ji’an, P.R. China
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13
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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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14
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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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15
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Wang YF, Wang WM, Sun HF, Wang WT, Wang MY, Tang YT, Wu ZL. A New Planar Hexanuclear Dysprosium Cluster Exhibiting Slow Magnetic Relaxation Features. Z Anorg Allg Chem 2019. [DOI: 10.1002/zaac.201900170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Yu-Fang Wang
- Scientific Research Department; Shijiazhuang University of Applied Technology; 050081 Shijiazhuang P. R. China
| | - Wen-Min Wang
- Department of Chemistry; Taiyuan Normal University; 030619 Jinzhong P. R. China
| | - Hao-Fei Sun
- College of Chemistry and Environmental Science; Hebei University; 071002 Baoding P. R. China
| | - Wan-Ting Wang
- College of Chemistry and Environmental Science; Hebei University; 071002 Baoding P. R. China
| | - Mei-Ying Wang
- College of Chemistry and Environmental Science; Hebei University; 071002 Baoding P. R. China
| | - Yu-Ting Tang
- College of Chemistry and Environmental Science; Hebei University; 071002 Baoding P. R. China
| | - Zhi-Lei Wu
- College of Chemistry and Environmental Science; Hebei University; 071002 Baoding P. R. China
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16
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Levitsky MM, Bilyachenko AN, Shubina ES, Long J, Guari Y, Larionova J. Magnetic cage-like metallasilsesquioxanes. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.213015] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Kushvaha SK, Arumugam S, Shankar B, Sarkar RS, Ramkumar V, Mondal KC. Isolation and Characterization of Different Homometallic and Heterobimetallic Complexes of Nickel and Zinc Ions by Controlling Molar Ratios and Solvents. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900338] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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18
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Zhao FH, Li ZL, He YC, Huang LW, Jia XM, Yan XQ, Wang YF, You JM. 1D Water cages in a double-walled framework based on cubic [Ni4(µ3-OH)4] units: Synthesis, structure, and magnetism. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.01.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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19
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Pogány L, Brachňaková B, Masárová P, Moncol J, Pavlik J, Gál M, Mazúr M, Herchel R, Nemec I, Šalitroš I. Impact of the Schiff base ligand substituents on the solid state and solution properties of eleven iron(iii) complexes. NEW J CHEM 2019. [DOI: 10.1039/c9nj03087e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A series of novel iron(iii)-Schiff base complexes have been prepared and structurally characterised. Their stereochemical, magnetic and redox properties were correlated with the molecular design of the corresponding N3O2-pentadentate Schiff base ligand.
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20
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Torić F, Pavlović G, Pajić D, Hrenar T, Zadro K, Cindrić M. Tetranuclear dicubane Ni(II) complexes with antiferromagnetically interacting Ni(II) ions: Solvothermal synthesis and magnetostructural study. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.09.068] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Ghosh TK, Mahapatra P, Jana S, Ghosh A. Variation of nuclearity in NiII complexes of a Schiff base ligand: crystal structures and magnetic studies. CrystEngComm 2019. [DOI: 10.1039/c9ce00574a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four NiII complexes have been synthesized by changing the reaction conditions and stoichiometry of the reactants. The magnetic coupling in the NiII4 complex is ferromagnetic whereas that in the NiII6 complex is antiferromagnetic.
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Affiliation(s)
- Tanmoy Kumar Ghosh
- Department of Chemistry
- University College of Science
- University of Calcutta
- Kolkata 700 009
- India
| | - Prithwish Mahapatra
- Department of Chemistry
- University College of Science
- University of Calcutta
- Kolkata 700 009
- India
| | - Subrata Jana
- Department of Chemistry
- University College of Science
- University of Calcutta
- Kolkata 700 009
- India
| | - Ashutosh Ghosh
- Department of Chemistry
- University College of Science
- University of Calcutta
- Kolkata 700 009
- India
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22
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Fard M, Behnia A, Puddephatt RJ. Supramolecular Polymer and Sheet and a Double Cubane Structure in Platinum(IV) Iodide Chemistry: Solution of a Longstanding Puzzle. ACS OMEGA 2018; 3:10267-10272. [PMID: 31459156 PMCID: PMC6644743 DOI: 10.1021/acsomega.8b01367] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 08/09/2018] [Indexed: 06/10/2023]
Abstract
The complexes [PtMe2(L)], L = 2-C5H4NCH2NH-x-C6H4OH (x = 2, 3, or 4), react with iodine to form [PtI2Me2(L)], by trans oxidative addition, when x = 3 or 4, and they are shown to have polymeric or sheet structures formed through NH···I hydrogen bonding. However, ligand dissociation occurs when x = 2 to give [(PtI2Me2) n ] and, with methyl group transfer, the complex [(PtIMe3·PtI2Me2)2]. This tetraplatinum cluster complex is shown to have a double cubane structure, thus solving a longstanding puzzle.
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23
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24
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25
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26
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Das M, Herchel R, Trávníček Z, Bertolasi V, Ray D. Anion coordination directed synthesis patterns for [Ni4] aggregates: structural changes for thiocyanate coordination and ligand arm hydrolysis. NEW J CHEM 2018. [DOI: 10.1039/c8nj03269f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Competitive bridging modes of HO− and NCS− were explored for four NiII-based coordination aggregates in cubane and dicubane topology.
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Affiliation(s)
- Manisha Das
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur 721 302
- India
| | - Radovan Herchel
- Division of Biologically Active Complexes and Molecular Magnets
- Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University in Olomouc
- 783 71 Olomouc
| | - Zdeněk Trávníček
- Division of Biologically Active Complexes and Molecular Magnets
- Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University in Olomouc
- 783 71 Olomouc
| | - Valerio Bertolasi
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Centro di Strutturistica Diffrattometrica
- University of Ferrara
- 44121 Ferrara
- Italy
| | - Debashis Ray
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur 721 302
- India
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27
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Ma XF, Wang Z, Chen XL, Kurmoo M, Zeng MH. Ligand Effect on the Single-Molecule Magnetism of Tetranuclear Co(II) Cubane. Inorg Chem 2017; 56:15178-15186. [PMID: 29200286 DOI: 10.1021/acs.inorgchem.7b02530] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiong-Feng Ma
- Key Laboratory for
the Chemistry and Molecular Engineering of Medicinal Resources, School
of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, People’s Republic of China
| | - Zhenxing Wang
- Wuhan National High Magnetic
Field Center, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
| | - Xue-Li Chen
- 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, People’s Republic of China
| | - Mohamedally Kurmoo
- Institut
de Chimie de Strasbourg, CNRS-UMR7177, Université de Strasbourg, 67070 Strasbourg, France
| | - Ming-Hua Zeng
- Key Laboratory for
the Chemistry and Molecular Engineering of Medicinal Resources, School
of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, People’s Republic of 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
and Chemical Engineering, Hubei University, Wuhan 430062, People’s Republic of China
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