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A Manganese(II) 3D Metal–Organic Framework with Siloxane-Spaced Dicarboxylic Ligand: Synthesis, Structure, and Properties. INORGANICS 2023. [DOI: 10.3390/inorganics11010021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
A new metal–organic framework {[Mn4(Cx)3(etdipy)5]·2ClO4}n (1) was prepared via the complexation of manganese ion from a Mn(ClO4)2 source with 1,3-bis(carboxypropyl)tetramethyldisiloxane (Cx) and 1,2-di(4-pyridyl)ethylene (etdipy) in the presence of 2,4-lutidine as a deprotonating agent. The single-crystal X-ray diffraction analysis revealed a dense 3D framework structure. The presence in the structure of flexible tetramethyldisiloxane moieties, which tend to orient themselves at the interface with the air, gives the compound a highly hydrophobic character, as indicated by the result of the water vapor sorption analysis in the dynamic regime, as well as the shape and stability of the water droplet on the crystalline mass of the compound. The compound is an electrical insulator, and due to its hydrophobicity, this characteristic is unaffected by environmental dampness. The thermal analysis indicated thermal stability up to about 300 °C and an unusual thermal transition for an MOF structure, more precisely a glass transition at 24 °C, the latter also being attributed to the flexible segments in the structure. The magnetic studies showed dominant antiferromagnetic interactions along the metal ion chain in compound 1.
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Cu(II)/Guanidine Functionalized Disiloxane Complex of Supramolecular Structures for Visible Light-Driven Photocatalysis of Congo Red. Polymers (Basel) 2022; 14:polym14040817. [PMID: 35215730 PMCID: PMC8963006 DOI: 10.3390/polym14040817] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/14/2022] [Accepted: 02/18/2022] [Indexed: 01/27/2023] Open
Abstract
The present study focuses on the synthesis of a new guanidine-functionalized disiloxane used as a ligand to obtain copper(II) complexes linked through hydrogen bonding into supramolecular structures. A two-step procedure was used to prepare the guanidine functionalized disiloxane ligand. Firstly, the hydrosilylation reaction between the siloxane precursor, namely 1,1,3,3-tetramethyldisiloxane (DS), and the allyl glycidyl ether (AGE) was performed in the presence of a platinum catalyst resulting in glycidoxypropyldisiloxane (DS-PMO) intermediary compound. In the second step, DS-PMO derivative was modified with 1,1,3,3-tetramethyl guanidine (TMGu) to obtain the guanidine-functionalized disiloxane ligand (bGu-DS) that was further used for the coordination of copper(II) acetate hydrate. The structures of the ligand and of its Cu(II) complex were confirmed by spectral methods (IR, UV-Vis, NMR, XRF) and correlated with theoretical calculations using semi-empirical PM6 and DFT methods. The copper(II) complex was found to exhibit low optical band gap energy (2.9 eV) and good photocatalytic activity under visible light irradiation in the decomposition of Congo Red (CR). A dye removal efficiency higher than 97% at the catalyst and CR concentrations of 1 and, respectively, 200 mg/L was obtained.
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Stoica AC, Damoc M, Zaltariov MF, Racles C, Cazacu M. Two-dimensional coordination polymers containing permethylated motifs - promising candidates for 2D emerging materials. Structural, behavioral and functional particularities. REACT FUNCT POLYM 2021. [DOI: 10.1016/j.reactfunctpolym.2021.105039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Cazacu M, Racles C, Zaltariov MF, Dascalu M, Bele A, Tugui C, Bargan A, Stiubianu G. From Amorphous Silicones to Si-Containing Highly Ordered Polymers: Some Romanian Contributions in the Field. Polymers (Basel) 2021; 13:polym13101605. [PMID: 34065717 PMCID: PMC8157024 DOI: 10.3390/polym13101605] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/12/2021] [Accepted: 05/12/2021] [Indexed: 11/16/2022] Open
Abstract
Polydimethylsiloxane (PDMS), in spite of its well-defined helical structure, is an amorphous fluid even at extremely high molecular weights. The cause of this behavior is the high flexibility of the siloxane backbone and the lack of intermolecular interactions attributed to the presence of methyl groups. These make PDMS incompatible with almost any organic or inorganic component leading to phase separation in siloxane-siloxane copolymers containing blocks with polar organic groups and in siloxane-organic copolymers, where dimethylsiloxane segments co-exist with organic ones. Self-assembly at the micro- or nanometric scale is common in certain mixed structures, including micelles, vesicles, et cetera, manifesting reversibly in response to an external stimulus. Polymers with a very high degree of ordering in the form of high-quality crystals were obtained when siloxane/silane segments co-exist with coordinated metal blocks in the polymer chain. While in the case of coordination of secondary building units (SBUs) with siloxane ligands 1D chains are formed; when coordination is achieved in the presence of a mixture of ligands, siloxane and organic, 2D structures are formed in most cases. The Romanian research group's results regarding these aspects are reviewed: from the synthesis of classic, amorphous silicone products, to their adaptation for use in emerging fields and to new self-assembled or highly ordered structures with properties that create perspectives for the use of silicones in hitherto unexpected areas.
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Affiliation(s)
- Maria Cazacu
- Correspondence: ; Tel.: +40-232-217-454; Fax: +40-232-211-299
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Wang J, Zhang Q, Hu D, Zhan T, Guo Z, Wang S, Hu Y. Reprogrammable fluorescence logic sensing for biomolecules via RNA-like coenzyme A-based coordination polymer. Biosens Bioelectron 2020; 165:112405. [PMID: 32729525 DOI: 10.1016/j.bios.2020.112405] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 05/13/2020] [Accepted: 06/21/2020] [Indexed: 01/28/2023]
Abstract
In this study, coenzyme A (CoA)-based coordination polymers (CPs) have been generated in situ by exploiting the reaction of thiols with metal ion (Au(III) or Ag(I)), which are dependent on both thiol-metal and aurophilic metal∙metal interaction. It is interesting to note that CPs-related biosensing capabilities toward some biomolecules including ascorbic acid (AA), cysteine (Cys) and glutathione (GSH) are also investigated via SYBR Green II (SGII)-derived fluorescence switchable mechanisms. The synthesized CPs display especial RNA-like structure and are capable of initiating the fluorescence of SGII. Conversely, AA, Cys or GSH can give rise to the structural destruction of RNA-like CPs, thus inhibiting the fluorescence signal, and quantitative detection of these biomolecules are achieved favorably with a detection limit of 7.2, 0.55 and 0.48 nM, respectively. Meanwhile, the fascinating fluorescence on-off property and simple synthetic process are employed to build a series of basic logic gates (YES, NOT, OR, AND, INHIBIT and NOR) and multiple configurable logic gates (OR-AND and OR-OR-INHIBIT) along with different logic inputs. In view of these, developing CoA-based CPs as a new material to execute logic operations provides a valuable platform to establish the next generation of advanced molecular devices for clinic diagnostic and biomedical research.
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Affiliation(s)
- Jiao Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, PR China
| | - Qingqing Zhang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, PR China; State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan, 410082, PR China
| | - Dandan Hu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, PR China
| | - Tianyu Zhan
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, PR China
| | - Zhiyong Guo
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, PR China
| | - Sui Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, PR China
| | - Yufang Hu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, PR China; State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan, 410082, PR China.
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Shova S, Vlad A, Damoc M, Tiron V, Dascalu M, Novitchi G, Ursu C, Cazacu M. Nanoscale Coordination Polymer of Dimanganese(II) as Infinite, Flexible Nanosheets with Photo‐Switchable Morphology. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000098] [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]
Affiliation(s)
- Sergiu Shova
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A 700487 Iasi Romania
| | - Angelica Vlad
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A 700487 Iasi Romania
| | - Madalin Damoc
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A 700487 Iasi Romania
| | - Vasile Tiron
- Faculty of Physics Alexandru Ioan Cuza University of Iasi Blvd. Carol I no. 11 700506 Iași Romania
| | - Mihaela Dascalu
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A 700487 Iasi Romania
| | - Ghenadie Novitchi
- CNRS UPR 3228 Laboratoire National des Champs Magnétiques Intenses 25 Rue des Martyrs 38042 Grenoble France
| | - Cristian Ursu
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A 700487 Iasi Romania
| | - Maria Cazacu
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A 700487 Iasi Romania
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Astakhov GS, Bilyachenko AN, Levitsky MM, Shul'pina LS, Korlyukov AA, Zubavichus YV, Khrustalev VN, Vologzhanina AV, Shubina ES, Dorovatovskii PV, Shul'pin GB. Coordination Affinity of Cu(II)-Based Silsesquioxanes toward N,N-Ligands and Associated Skeletal Rearrangements: Cage and Ionic Products Exhibiting a High Catalytic Activity in Oxidation Reactions. Inorg Chem 2020; 59:4536-4545. [PMID: 32162522 DOI: 10.1021/acs.inorgchem.9b03680] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An unusual skeletal rearrangement of piperazine into ethylenediamine has been observed for the first time as a result of an attempt to synthesize a piperazine-linked metal-organic framework (MOF) using cage Cu(II),Na-phenylsilsequixane as a potential building block. Instead of the expected "metallasilsesquioxane-based MOF", a Cu6 complex 1 coordinated both by silsesquioxane and ethylenediamine ligands was isolated. An effort to reproduce this result via direct interaction of Cu-phenylsilsequioxane and ethylenediamine surprisingly afforded two other types of complexes, copper-sodium 2 and copper 3 ionic products. Cationic components in both products 2 and 3 are represented by (i) copper and sodium ions (in the case of 2) or (ii) copper ions exclusively (in the case of 3) coordinated by ethylenediamine ligands. Both complexes 2 and 3 include Si6-based condensed silsesquioxane fragments serving as anionic components of the products. Symptomatically, the types of the Si6-frameworks in 2 and 3 are drastically different. More specifically, the Si6 unit in 2 is an unprecedented distorted silsesquioxane skeleton consisting of two condensed tetramembered rings. Structural features of compounds 1-3 were established by single crystal X-ray diffraction. Compound 2 was found to catalyze the oxidation of cyclohexane to cyclohexanol and cyclohexanone with H2O2 (a mixture of these products was obtained after adding PPh3 to the reaction solution) as well as the transformation of cyclohexanol to cyclohexanone under the action of tert-butyl hydroperoxide.
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Affiliation(s)
- Grigorii S Astakhov
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Str., 28, Moscow 119991, Russia.,Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklay Str., 6, Moscow 117198, Russia
| | - Alexey N Bilyachenko
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Str., 28, Moscow 119991, Russia.,Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklay Str., 6, Moscow 117198, Russia
| | - Mikhail M Levitsky
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Str., 28, Moscow 119991, Russia
| | - Lidia S Shul'pina
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Str., 28, Moscow 119991, Russia
| | - Alexander A Korlyukov
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Str., 28, Moscow 119991, Russia.,Pirogov Russian National Research Medical University, Ostrovitianov Str., 1, Moscow 117997, Russia
| | - Yan V Zubavichus
- Boreskov Institute of Catalysis SB RAS, prosp. Akad. Lavrentieva, dom 5, Novosibirsk 630090, Russia
| | - Victor N Khrustalev
- Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklay Str., 6, Moscow 117198, Russia.,Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russia
| | - Anna V Vologzhanina
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Str., 28, Moscow 119991, Russia
| | - Elena S Shubina
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Str., 28, Moscow 119991, Russia
| | - Pavel V Dorovatovskii
- National Research Center "Kurchatov Institute", pl. Akad. Kurchatova, dom 1, Moscow 123182, Russia
| | - Georgiy B Shul'pin
- Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina, dom 4, Moscow 119991, Russia.,Plekhanov Russian University of Economics, Stremyannyi pereulok, dom 36, Moscow 117997, Russia
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Gavrish SP, Shova S, Cazacu M, Dascalu M, Lampeka YD. Syntheses and crystal structures of the one-dimensional coordination polymers formed by [Ni(cyclam)] 2+ cations and 1,3-bis-(3-carb-oxy-prop-yl)tetra-methyl-disiloxane anions in different degrees of deprotonation. Acta Crystallogr E Crystallogr Commun 2020; 76:446-451. [PMID: 32148892 PMCID: PMC7057376 DOI: 10.1107/s2056989020002327] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 02/19/2020] [Indexed: 11/24/2022]
Abstract
The asymmetric units of the title compounds, namely, catena-poly[[(1,4,8,11-tetra-aza-cyclo-tetra-decane-κ4 N 1,N 4,N 8,N 11)nickel(II)]-μ-1,3-bis-(3-carboxyl-ato-prop-yl)tetra-methyl-disiloxane-κ2 O:O'], [Ni(C10H24O5Si2)(C12H24N4)] n (I), and catena-poly[[[(1,4,8,11-tetra-aza-cyclo-tetra-decane-κ4 N 1,N 4,N 8,N 11)nickel(II)]-μ-4-({[(3-carb-oxy-prop-yl)di-methyl-sil-yl]-oxy}di-methyl-sil-yl)butano-ato-κ2 O:O'] per-chlorate], {[Ni(C10H25O5Si2)(C12H24N4)]ClO4} n (II), consist of one (in I) or two crystallographically non-equivalent (in II) centrosymmetric macrocyclic cations and one centrosymmetric dianion (in I) or two centrosymmetric monoanions (in II). In each compound, the metal ion is coordinated by the four secondary N atoms of the macrocyclic ligand, which adopts the most energetically stable trans-III conformation, and the mutually trans O atoms of the carboxyl-ate in a slightly tetra-gonally distorted trans-NiN4O2 octa-hedral coordination geometry. The crystals of both types of compounds are composed of parallel polymeric chains of the macrocyclic cations linked by the anions of the acid running along the [101] and [110] directions in I and II, respectively. In I, each polymeric chain is linked to four neighbouring ones by hydrogen bonding between the NH groups of the macrocycle and the carboxyl-ate O atoms, thus forming a three-dimensional supra-molecular network. In II, each polymeric chain contacts with only two neighbours, forming hydrogen bonds between the partially protonated carb-oxy-lic groups of the bridging ligand. As a result, a lamellar structure is formed with the layers oriented parallel to the (11) plane.
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Affiliation(s)
- Sergey P. Gavrish
- L.V. Pisarzhevskii Institute of Physical Chemistry of the National Academy of Sciences of Ukraine, Prospekt Nauki 31, Kyiv 03028, Ukraine
| | - Sergiu Shova
- "Petru Poni" Institute of Macromolecular Chemistry, Department of Inorganic Polymers, Aleea Grigore Ghica Voda 41A, RO-700487 Iasi, Romania
| | - Maria Cazacu
- "Petru Poni" Institute of Macromolecular Chemistry, Department of Inorganic Polymers, Aleea Grigore Ghica Voda 41A, RO-700487 Iasi, Romania
| | - Mihaela Dascalu
- "Petru Poni" Institute of Macromolecular Chemistry, Department of Inorganic Polymers, Aleea Grigore Ghica Voda 41A, RO-700487 Iasi, Romania
| | - Yaroslaw D. Lampeka
- L.V. Pisarzhevskii Institute of Physical Chemistry of the National Academy of Sciences of Ukraine, Prospekt Nauki 31, Kyiv 03028, Ukraine
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Amphiphilic silicone-bridged bis-triazoles as effective, selective metal ligands and biologically active agents in lipophilic environment. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111560] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Cazacu M, Turcan‐Trofin G, Vlad A, Bele A, Shova S, Nicolescu A, Bargan A. Hydrophobic, amorphous metal–organic network readily prepared by complexing the aluminum ion with a siloxane spaced dicarboxylic acid in aqueous medium. J Appl Polym Sci 2019. [DOI: 10.1002/app.47144] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- M. Cazacu
- Inorganic Polymers Department“Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A, 700487, Iasi Romania
| | - G.‐O. Turcan‐Trofin
- Inorganic Polymers Department“Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A, 700487, Iasi Romania
| | - A. Vlad
- Inorganic Polymers Department“Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A, 700487, Iasi Romania
| | - A. Bele
- Inorganic Polymers Department“Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A, 700487, Iasi Romania
| | - S. Shova
- Inorganic Polymers Department“Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A, 700487, Iasi Romania
| | - A. Nicolescu
- Inorganic Polymers Department“Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A, 700487, Iasi Romania
| | - A. Bargan
- Inorganic Polymers Department“Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A, 700487, Iasi Romania
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Studies on the structural diversity of MOFs containing octahedral siloxane-backboned connectors. Polyhedron 2019. [DOI: 10.1016/j.poly.2018.09.050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Syntheses, crystal structures, spectroscopic and magnetic properties of two trinuclear iron complexes with carboxylate and oximate mixed-bridge ligands. TRANSIT METAL CHEM 2018. [DOI: 10.1007/s11243-018-0268-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Racles C, Silion M, Sacarescu L. Multi-tasking pyridyl-functionalized siloxanes. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.03.050] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Yang W, Yang H, Zeng SY, Li DC, Dou JM. Unprecedented family of heterometallic Ln III[18-metallacrown-6] complexes: syntheses, structures, and magnetic properties. Dalton Trans 2017; 46:13027-13034. [PMID: 28937171 DOI: 10.1039/c7dt02735d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, a new family of LnIII[18-metallacrown-6] compounds with the formula [Fe6O2Ln(tBu-sao)6(OH)(MeO)4(MeOH)(H2O)]·6MeOH [Ln = DyIII (1), TbIII (2), GdIII (3), and YIII (4), tBu-saoH2 = 3,5-di-tert-butylsalicylaldoxime] was synthesized through one-pot reactions using tBu-saoH2, Fe(ClO4)3·6H2O, and Ln(NO3)3·6H2O. The four compounds are isostructural, and the encapsulation of a Ln ion in the ring cavity of 18-metallacrown-6 (18-MC-6) was exhibited for the first time. The structural analysis shows a ship-like 18-MC-6 core with a beset lanthanide ion connecting six ring oxygen atoms (OMC). Magnetic measurements reveal domain antiferromagnetic coupling interactions between metal ions and field-dependent slow magnetic relaxation in 1-3.
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Affiliation(s)
- Wei Yang
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemical and Chemical Engineering, Liaocheng University, 252059 Liaocheng, P.R. China.
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