1
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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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2
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Zhou CY, Du YJ, Su F, Zhang BX, Li SD. Crystal structure of poly[bis(μ 2-1,4-di(1 H-imidazol-1-yl)benzene-κ 2
N: N′)-(μ 2-tetraoxidomolybdato(VI)-κ 2
O: O′)cobalt(II)], C 24H 20N 8O 4MoCo. Z KRIST-NEW CRYST ST 2020. [DOI: 10.1515/ncrs-2020-0388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C24H20N8O4MoCo, monoclinic, C2/c (no. 15), a = 19.3535(7) Å, b = 10.0870(4) Å, c = 12.4174(5) Å, β = 97.3700(10)°, V = 2404.08(16) Å3, Z = 4, R
gt(F) = 0.0218, wR
ref(F
2) = 0.0577, T = 298(2) K.
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Affiliation(s)
- Cheng-Yong Zhou
- Department of Chemistry , Changzhi University , Changzhi, Shanxi, 046011 , People’s Republic of China
| | - Yu-Jie Du
- School of Chemistry and Material Science , Shanxi Normal University , Linfen, Shanxi, 041000 , People’s Republic of China
| | - Feng Su
- Department of Chemistry , Changzhi University , Changzhi, Shanxi, 046011 , People’s Republic of China
| | - Bao-Xiu Zhang
- Department of Chemistry , Changzhi University , Changzhi, Shanxi, 046011 , People’s Republic of China
| | - Shao-Dong Li
- Department of Chemistry , Changzhi University , Changzhi, Shanxi, 046011 , People’s Republic of China
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3
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Mewis RE, Archibald SJ. Side-bridged cyclam transition metal complexes bearing a phenolic ether or a phenolate pendent arm. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.08.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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4
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Slater-Parry ME, Durrant JP, Howells JM, Pitak MB, Horton PN, Klooster WT, Coles SJ, O'Connor HM, Brechin EK, Barra AL, Jones LF. Crowding out: ligand modifications and their structure directing effects on brucite-like {M x(μ 3-OH) y} (M = Co(ii), Ni(ii)) core growth within polymetallic cages. Dalton Trans 2019; 48:1477-1488. [PMID: 30632582 DOI: 10.1039/c8dt04229b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Previous employment of the ligands 2-methoxy-6-[(methylimino)methyl]phenol (L1H) and 2-methoxy-6-[(phenylimino)methyl]phenol (L2H) has resulted in the self-assembly of pseudo metallocalix[6]arene complexes of general formulae: [M7(μ3-OH)6(Lx)6](NO3)y (M = Ni(ii), x = 1, y = 2 (1) and Co(ii/iii), x = 2, y = 3 (2)). Extrapolating upon this work, we report the coordination chemistry of ligands 2-methoxy-6-{[(2-methoxyphenyl)imino]methyl}phenol (L3H), 2-[(benzylimino)methyl]-6-methoxyphenol (L4H), 2-[(benzylamino)methyl]-6-methoxyphenol (L5H) and 2-[(benzylamino)methyl]-4-bromo-6-methoxyphenol (L6H), whose structures are modifications of ligands L1-2H. These ligands are employed in the synthesis and characterisation of the dimetallic complex [Ni(ii)2(L3)3(H2O)](NO3)·2H2O·3MeOH (3); the monometallic complexes [Ni(ii)(L4)2] (4) and [Co(iii)(L4)3]·H2O·MeOH (5a); and the tetranuclear pseudo metallocalix[4]arene complexes: [(NO3)⊂Co(ii)4(μ3-OH)2(L5)4(H2O)2](NO3)·H2O (6), [(NO3)⊂Ni(ii)4(μ3-OH)2(L5)4(H2O)2](NO3)·H2O (7) and [Ni(ii)4(μ3-OH)2(L6)4(NO3)2]·MeCN (8). The tetrametallic 'butterfly' core topologies in 6-8 are discussed with respect to their structural and topological relationship with their heptanuclear [M7] (M = Co(ii), Ni(ii)) pseudo metallocalix[6]arene ancestors (1 and 2).
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Affiliation(s)
| | - James P Durrant
- School of Natural Sciences, Bangor University, Bangor, Wales, LL57 2DG, UK.
| | - Joshua M Howells
- School of Natural Sciences, Bangor University, Bangor, Wales, LL57 2DG, UK.
| | - Mateusz B Pitak
- UK National Crystallographic Service, Chemistry, Faculty of Natural and Environmental Sciences, University of Southampton, England SO17 1BJ, UK
| | - Peter N Horton
- UK National Crystallographic Service, Chemistry, Faculty of Natural and Environmental Sciences, University of Southampton, England SO17 1BJ, UK
| | - Wim T Klooster
- UK National Crystallographic Service, Chemistry, Faculty of Natural and Environmental Sciences, University of Southampton, England SO17 1BJ, UK
| | - Simon J Coles
- UK National Crystallographic Service, Chemistry, Faculty of Natural and Environmental Sciences, University of Southampton, England SO17 1BJ, UK
| | - Helen M O'Connor
- EaStCHEM School of Chemistry, David Brewster Road, University of Edinburgh, Edinburgh, Scotland EH9 3FJ, UK
| | - Euan K Brechin
- EaStCHEM School of Chemistry, David Brewster Road, University of Edinburgh, Edinburgh, Scotland EH9 3FJ, UK
| | - Anne-Laure Barra
- LNCMI-CNRS, Universite Grenoble-Alpes, Avenue des Martyrs, Grenoble, France
| | - Leigh F Jones
- School of Natural Sciences, Bangor University, Bangor, Wales, LL57 2DG, UK.
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5
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Enel M, Leygue N, Balayssac S, Laurent S, Galaup C, Vander Elst L, Picard C. New polyaminocarboxylate macrocycles containing phenolate binding units: synthesis, luminescent and relaxometric properties of their lanthanide complexes. Dalton Trans 2018; 46:4654-4668. [PMID: 28327741 DOI: 10.1039/c7dt00291b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of two new polyaminocarboxylate macrocycles incorporating one or two intracyclic phenol units (H4L1 and H8L2, respectively) is described. The 12-membered H4L1 macrocycle leads to soluble and stable mononuclear LnIII complexes of [(L1)Ln(H2O)2]- composition (Ln = Eu, Tb and Gd) in aqueous solutions. In Tris buffer (pH 7.4), the [(L1)Tb(H2O)2]- complex displays a suitable efficiency for sensitized emission (ηsens = 48%) and a high luminescence quantum yield (Φ = 22%), which is worthy of note for a bis-hydrated terbium complex. Besides, luminescence experiments show that bidentate endogenous anions (citrate, carbonate, and phosphate) do not displace the two inner-sphere water molecules of this complex. In contrast, the possible presence of LMCT states causes the europium complex to be weakly luminescent. The [(L1)Gd(H2O)2]- complex is characterized by high relaxivity (r = 7.2 s-1 mM-1 at 20 MHz) and a very short water residence time of the coordinated water molecules (τ = 9 ns), promising values for the realisation of macromolecular systems with high relaxivities. Thus, the Tb and Gd complexes of the H4L1 macrocycle exhibit several improvements in terms of luminescent (lower excitation energy, higher brightness) and relaxometric (shorter τM) properties compared to the corresponding LnPCTA complexes, where a phenol moiety substitutes a pyridine ring. On the other hand, the 24-membered H8L2 macrocycle including two phenol units in its structure leads to dinuclear complexes of [(L2)Ln2]2- composition. Its terbium complex shows a long luminescence lifetime (2 ms) and a high quantum yield (43%) in aqueous solutions, making this compound a new promising candidate for time-resolved applications.
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Affiliation(s)
- Morgane Enel
- CNRS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, UMR-5068, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France. and Université de Toulouse, UPS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, 118 route de Narbonne, F-31062 Toulouse cedex 9, France
| | - Nadine Leygue
- CNRS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, UMR-5068, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France. and Université de Toulouse, UPS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, 118 route de Narbonne, F-31062 Toulouse cedex 9, France
| | - Stéphane Balayssac
- CNRS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, UMR-5068, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France. and Université de Toulouse, UPS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, 118 route de Narbonne, F-31062 Toulouse cedex 9, France
| | - Sophie Laurent
- NMR and Molecular Imaging Laboratory, Department of General, Organic and Biomedical Chemistry, University of Mons, 23 Place du Parc, B-7000 Mons, Belgium. and Center for Microscopy and Molecular Imaging (CMMI), Rue Adrienne Bolland, 8, B-6041 Gosselies, Belgium
| | - Chantal Galaup
- CNRS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, UMR-5068, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France. and Université de Toulouse, UPS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, 118 route de Narbonne, F-31062 Toulouse cedex 9, France
| | - Luce Vander Elst
- NMR and Molecular Imaging Laboratory, Department of General, Organic and Biomedical Chemistry, University of Mons, 23 Place du Parc, B-7000 Mons, Belgium. and Center for Microscopy and Molecular Imaging (CMMI), Rue Adrienne Bolland, 8, B-6041 Gosselies, Belgium
| | - Claude Picard
- CNRS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, UMR-5068, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France. and Université de Toulouse, UPS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, 118 route de Narbonne, F-31062 Toulouse cedex 9, France
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6
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Structural diversity of a series of terpyridyl carboxylate coordination polymers: Luminescent sensor and magnetic properties. J SOLID STATE CHEM 2018. [DOI: 10.1016/j.jssc.2017.11.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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7
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Nemec I, Herchel R, Machata M, Trávníček Z. Tetranuclear Ni(ii) and Co(ii) Schiff-base complexes with an M4O6 defective dicubane-like core: zero-field SMM behavior in the cobalt analogue. NEW J CHEM 2017. [DOI: 10.1039/c7nj02281f] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two tetranuclear Ni4 and Co4 complexes were prepared and characterized. Their magnetic properties were thoroughly studied and it was revealed that the Co4 compound behaves as a zero-field single-molecule magnet.
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Affiliation(s)
- Ivan Nemec
- Department of Inorganic Chemistry
- Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University
- CZ-771 46 Olomouc
| | - Radovan Herchel
- Department of Inorganic Chemistry
- Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University
- CZ-771 46 Olomouc
| | - Marek Machata
- Department of Inorganic Chemistry
- Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University
- CZ-771 46 Olomouc
| | - Zdeněk Trávníček
- Department of Inorganic Chemistry
- Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University
- CZ-771 46 Olomouc
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8
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Hänninen MM, Välivaara J, Cano J, Sillanpää R, Colacio E. Experimental and Computational Study of Unique Tetranuclear µ3-Chloride and µ-Phenoxo/Chloro-Bridged Defective Dicubane Cobalt(II) Clusters. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501190] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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9
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Mandal L, Majumder S, Mohanta S. Syntheses, crystal structures and steady state and time-resolved fluorescence properties of a PET based macrocycle and its dinuclear ZnII/CdII/HgII complexes. Dalton Trans 2016; 45:17365-17381. [DOI: 10.1039/c6dt02631a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The present report deals with solution spectroscopic (absorption and emission) and colorimetric studies of a Robson type tetraaminodiphenol macrocyclic ligand and its ZnII2, CdII2 and HgII2 compounds.
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Affiliation(s)
- Leena Mandal
- Department of Chemistry
- University of Calcutta
- Kolkata 700 009
- India
| | - Samit Majumder
- Department of Chemistry
- University of Calcutta
- Kolkata 700 009
- India
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10
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Tirfoin R, Chamoreau LM, Li Y, Fleury B, Lisnard L, Journaux Y. Synthesis, structure and magnetic properties of phenylhydroxamate-based coordination clusters. Dalton Trans 2014; 43:16805-17. [PMID: 25287754 DOI: 10.1039/c4dt02405b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The strategic recombination of preformed coordination clusters in the presence of polymodal bridging ligands has successfully led to the characterisation of five new compounds of structural and magnetic interest. Indeed using the dinuclear complex [M2(H2O)(piv)4(Hpiv)4] (M = Co, Ni; Hpiv = pivalic acid) as starting material and reacting it with phenylhydroxamic acid (H2pha) has yielded the four tetrametallic coordination clusters [Co4(Hpha)2(piv)6(Hpiv)4] (1), [Ni4(Hpha)2(piv)6(Hpiv)2(DMF)2] (2), [Co4(Hpha)2(piv)6(EtOH)2(H2O)2] (3), [Ni4(Hpha)2(piv)6(EtOH)2(H2O)2] (4) and the hexanuclear complex [Co6(Hpha)4(piv)8(EtOH)2]·EtOH (5). All the compounds have been structurally characterised revealing a particular binding mode for the hydroxamate ligand. The study of their magnetic properties has been performed and the modelling of these properties has been done using the appropriate hamiltonians for each compound. The experimental data and their modelling show non-zero spin ground states for compounds 4 and 5.
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Affiliation(s)
- Rémi Tirfoin
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8232, Institut Parisien de Chimie Moléculaire, F-75005 Paris, France.
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11
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A novel 2D inorganic–organic hybrid compound constructed from {CuMo2O7}n bimetallic oxide chains bridged by N-containing ligand. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2014.04.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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