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Chen QW, Ding YS, Zhu XF, Wang BW, Zheng Z. Substituent Positioning Effects on the Magnetic Properties of Sandwich-Type Erbium(III) Complexes with Bis(trimethylsilyl)-Substituted Cyclooctatetraenyl Ligands. Inorg Chem 2024; 63:9511-9519. [PMID: 38135507 DOI: 10.1021/acs.inorgchem.3c03369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2023]
Abstract
Lanthanide complexes with judiciously designed ligands have been extensively studied for their potential applications as single-molecule magnets. With the influence of ligands on their magnetic properties generally established, recent research has unearthed certain effects inherent to site differentiation due to the different types and varying numbers of substituents on the same ligand platform. Using two new sandwich-type Er(III) complexes with cyclooctatetraenyl (COT) ligands featuring two differently positioned trimethylsilyl (TMS) substituents, namely, [Li(DME)Er(COT1,5-TMS2)2]n (Er1) and [Na(DME)3][Er(COT1,3-TMS2)2] (Er2) [COT1,3-TMS2 and COT1,5-TMS2 donate 1,3- and 1,5-bis(trimethylsilyl)-substituted cyclooctatetraenyl ligands, respectively; DME = 1,2-dimethoxyethane], and with reference to previously reported [Li(DME)3][Er(COT1,4-TMS2)2] (A) and [K(DME)2][Er(COT1,4-TMS2)2] (B), any possible substituent position effects have been explored for the first time. The rearrangement of the TMS substituents from the starting COT1,4-TMS2 to COT1,3-TMS2 and COT1,5-TMS2, by way of formal migration of the TMS group, was thermally induced in the case of Er1, while for the formation of Er2, the use of Na+ in the placement of its Li+ and K+ congeners is essential. Both Er1 and Er2 display single-molecule magnetic behaviors with energy barriers of 170(3) and 172(6) K, respectively. Magnetic hysteresis loops, butterfly-shaped for Er1 and wide open for Er2, were observed up to 12 K for Er1 and 13 K for Er2. Studies of magnetic dynamics reveal the different pathways for relaxation of magnetization below 10 K, mainly by the Raman process for Er1 and by quantum tunneling of magnetization for Er2, leading to the order of magnitude difference in magnetic relaxation times and sharply different magnetic hysteresis loops.
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Affiliation(s)
- Qi-Wei Chen
- School of Chemistry and Life Science, Changchun University of Technology, Changchun 130012, China
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - You-Song Ding
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
- Key University Laboratory of Rare Earth Chemistry of Guangdong, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Xiao-Fei Zhu
- School of Chemistry and Life Science, Changchun University of Technology, Changchun 130012, China
| | - Bing-Wu Wang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Zhiping Zheng
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
- Key University Laboratory of Rare Earth Chemistry of Guangdong, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
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2
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Hauser A, Münzfeld L, Uhlmann C, Lebedkin S, Schlittenhardt S, Ruan TT, Kappes MM, Ruben M, Roesky PW. It's not just the size that matters: crystal engineering of lanthanide-based coordination polymers. Chem Sci 2024; 15:1338-1347. [PMID: 38274072 PMCID: PMC10806785 DOI: 10.1039/d3sc03746k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 12/05/2023] [Indexed: 01/27/2024] Open
Abstract
Synthesis and characterization of Lewis base free coordination polymers of selected lanthanides are presented. For this purpose, the substituted CotTIPS ligand (CotTIPS = 1,4-bis-triisopropylsilyl-cyclo-octatetraendiide) was used to synthesize homoleptic, anionic multidecker compounds of the type [K{LnIII(ɳ8-CotTIPS)2}]n. Depending on the solvent used for crystallization and the ionic radii of the lanthanide cations, three different categories of one-dimensional heterobimetallic coordination polymers were obtained in the solid state. For the early lanthanides La and Ce a unique helical conformation was obtained by crystallization from toluene, while the ionic radius of Pr seems to be a turning point towards the crystallization of zigzag polymers. For Er a third structural motif, a trapezoidal wave polymer was observed. Additionally, the zigzag polymer for all compounds could be obtained by changing the solvent from toluene to Et2O, reavealing a correlation between solid-state structure and ionic radii as well as solvent. While photoluminescence (PL) properties of Cot-lanthanide compounds are scarce, the La complexes show ligand centered green luminescence, whereas the Ce complexes reveal deep red emission origin from d-f transitions. The Er-compounds are single-molecule magnets, in which the magnetic relaxation of each Er ion occurs isolated from its neighbors at temperatures above 10 K, while below 9 K a strong antiferromagnetic coupling between the Er ions was seen.
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Affiliation(s)
- Adrian Hauser
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT) Engesserstraße 15 D-76131 Karlsruhe Germany
| | - Luca Münzfeld
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT) Engesserstraße 15 D-76131 Karlsruhe Germany
| | - Cedric Uhlmann
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT) Engesserstraße 15 D-76131 Karlsruhe Germany
| | - Sergei Lebedkin
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 D-76344 Eggenstein-Leopoldshafen Germany
| | - Sören Schlittenhardt
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 D-76344 Eggenstein-Leopoldshafen Germany
| | - Ting-Ting Ruan
- Institute of Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Manfred M Kappes
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 D-76344 Eggenstein-Leopoldshafen Germany
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 2 D-76131 Karlsruhe Germany
| | - Mario Ruben
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 D-76344 Eggenstein-Leopoldshafen Germany
- Centre Européen de Science Quantique (CESQ), Institut de Science et d'Ingénierie Supramoléculaires (ISIS, UMR 7006), CNRS-Université de Strasbourg 8 allée Gaspard Monge BP 70028 67083 Strasbourg Cedex France
- Institute of Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Peter W Roesky
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT) Engesserstraße 15 D-76131 Karlsruhe Germany
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Borah A, Dey S, Gupta SK, Rajaraman G, Murugavel R. Field-induced SIM behaviour in early lanthanide(III) organophosphates containing 18-crown-6. Dalton Trans 2023. [PMID: 37317701 DOI: 10.1039/d3dt01206a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Single-ion magnets (SIMs) have attracted wide attention in recent years. Despite tremendous progress in late lanthanide SIMs, reports on early lanthanides exhibiting SIM characteristics are scarce. A series of five novel 18-crown-6 encapsulated mononuclear early lanthanide(III) organophosphates, [{(18-crown-6)Ln(dippH)3}{(18-crown-6)Ln(dippH)2(dippH2)}]·[I3] [Ln = Ce (1), Pr (2), Nd (3)] and [{Ln(18-crown-6)(dippH)2(H2O)}·{I3}] [Ln = Sm (4) and Eu (5)], have been synthesised in the present study. 18-crown-6 coordinates to Ln(III) ions in an equatorial position while the axial positions are occupied by either three phosphate moieties as in 1-3 or two phosphate moieties and one water molecule as in 4 and 5, resulting in a muffin-shaped coordination geometry around the Ln(III) centres. Magnetic susceptibility measurements reveal that Ce and Nd complexes are field-induced single-ion magnets with significant barrier heights. Furthermore, the ab initio CASSCF/RASSI-SO/SINGLE_ANISO calculations on complexes 1 and 3 reveal significant QTM in the ground state rationalising the field-induced single-ion magnetism behaviour of these complexes.
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Affiliation(s)
- Aditya Borah
- Department of Chemistry, Indian Institute of Technology, Powai, Mumbai, India.
| | - Sourav Dey
- Department of Chemistry, Indian Institute of Technology, Powai, Mumbai, India.
| | - Sandeep K Gupta
- Department of Chemistry, Indian Institute of Technology, Powai, Mumbai, India.
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology, Powai, Mumbai, India.
| | - Ramaswamy Murugavel
- Department of Chemistry, Indian Institute of Technology, Powai, Mumbai, India.
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Wang J, Sun CY, Zheng Q, Wang DQ, Chen YT, Ju JF, Sun TM, Cui Y, Ding Y, Tang YF. Lanthanide Single-molecule Magnets: Synthetic Strategy, Structures, Properties and Recent Advances. Chem Asian J 2023; 18:e202201297. [PMID: 36802202 DOI: 10.1002/asia.202201297] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/30/2023] [Accepted: 02/20/2023] [Indexed: 02/23/2023]
Abstract
Single-molecule magnets (SMMs) show wide potential applications in the field of ultrahigh-density storage materials, quantum computing, spintronics, and so on. Lanthanide (Ln) SMMs, as an important category of SMMs, open up a promising prospect due to their large magnetic moments and huge magnetic anisotropy. However, the construction of high performance for Ln SMMs remains an enormous challenge. Although remarkable advances are focused on the topic of Ln SMMs, the research on Ln SMMs with different nuclear numbers is still deficient. Therefore, this review summarizes the design strategies for the construction of Ln SMMs, as well as the metal skeleton types. Furthermore, we collect reported Ln SMMs with mononuclearity, dinuclearity, and multinuclearity (three or more Ln spin centers) and the SMM properties including energy barrier (Ueff ) and pre-exponential factor (τ0 ) are described. Finally, Ln SMMs with low-nuclearity SMMs, especially for single-ion magnets (SIMs), are highlighted to understand the correlations between structures and magnetic behavior of the detail SMM properties are described. We expect the review can shed light on the future developments of high-performance Ln SMMs.
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Affiliation(s)
- Jin Wang
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China.,Nantong Key Lab of Intelligent and New Energy Materials, Nantong, Jiangsu 226019, P. R. China
| | - Cheng-Yuan Sun
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China
| | - Qi Zheng
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China
| | - Dan-Qi Wang
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China
| | - Yu-Ting Chen
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China
| | - Jian-Feng Ju
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China
| | - Tong-Ming Sun
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China
| | - Ying Cui
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China
| | - Yan Ding
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China
| | - Yan-Feng Tang
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China.,Nantong Key Lab of Intelligent and New Energy Materials, Nantong, Jiangsu 226019, P. R. China
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Gransbury GK, Réant BLL, Wooles AJ, Emerson-King J, Chilton NF, Liddle ST, Mills DP. Electronic structure comparisons of isostructural early d- and f-block metal(iii) bis(cyclopentadienyl) silanide complexes. Chem Sci 2023; 14:621-634. [PMID: 36741509 PMCID: PMC9847655 DOI: 10.1039/d2sc04526e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022] Open
Abstract
We report the synthesis of the U(iii) bis(cyclopentadienyl) hypersilanide complex [U(Cp'')2{Si(SiMe3)3}] (Cp'' = {C5H3(SiMe3)2-1,3}), together with isostructural lanthanide and group 4 M(iii) homologues, in order to meaningfully compare metal-silicon bonding between early d- and f-block metals. All complexes were characterised by a combination of NMR, EPR, UV-vis-NIR and ATR-IR spectroscopies, single crystal X-ray diffraction, SQUID magnetometry, elemental analysis and ab initio calculations. We find that for the [M(Cp'')2{Si(SiMe3)3}] (M = Ti, Zr, La, Ce, Nd, U) series the unique anisotropy axis is conserved tangential to ; this is governed by the hypersilanide ligand for the d-block complexes to give easy plane anisotropy, whereas the easy axis is fixed by the two Cp'' ligands in f-block congeners. This divergence is attributed to hypersilanide acting as a strong σ-donor and weak π-acceptor with the d-block metals, whilst f-block metals show predominantly electrostatic bonding with weaker π-components. We make qualitative comparisons on the strength of covalency to derive the ordering Zr > Ti ≫ U > Nd ≈ Ce ≈ La in these complexes, using a combination of analytical techniques. The greater covalency of 5f3 U(iii) vs. 4f3 Nd(iii) is found by comparison of their EPR and electronic absorption spectra and magnetic measurements, with calculations indicating that uranium 5f orbitals have weak π-bonding interactions with both the silanide and Cp'' ligands, in addition to weak δ-antibonding with Cp''.
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Affiliation(s)
- Gemma K. Gransbury
- Department of Chemistry, The University of ManchesterOxford RoadManchesterM13 9PLUK
| | - Benjamin L. L. Réant
- Department of Chemistry, The University of ManchesterOxford RoadManchesterM13 9PLUK
| | - Ashley J. Wooles
- Department of Chemistry, The University of ManchesterOxford RoadManchesterM13 9PLUK
| | - Jack Emerson-King
- Department of Chemistry, The University of ManchesterOxford RoadManchesterM13 9PLUK
| | - Nicholas F. Chilton
- Department of Chemistry, The University of ManchesterOxford RoadManchesterM13 9PLUK
| | - Stephen T. Liddle
- Department of Chemistry, The University of ManchesterOxford RoadManchesterM13 9PLUK
| | - David P. Mills
- Department of Chemistry, The University of ManchesterOxford RoadManchesterM13 9PLUK
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Chen H, Sun L, Zheng K, Zhang J, Ma P, Wang J, Niu J. Oxalate-bridging Nd III-based arsenotungstate with multifunctional NIR-luminescence and magnetic properties. Dalton Trans 2022; 51:10257-10265. [PMID: 35748588 DOI: 10.1039/d2dt01066f] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Oxalate bridged Nd-based arsenotungstate, K14Na6H4[{(As2W19O67(H2O))Nd(H2O)2}2(C2O4)]·64H2O (1), was obtained from the reaction of K14[As2W19O67(H2O)], oxalic acid, and NdCl3·6H2O in mildly acidic aqueous solution. The polyanion exhibits a dimeric structure in which the fully deprotonated oxalate ligands bridge two NdIII cations and the arsenotungstate anions act as blocking ligands. The photoluminescence (PL) spectrum of 1 shows the characteristic emission peak of NdIII in the near-infrared (NIR) region. However, the O → W charge-transfer transitions of arsenotungstate cannot effectively sensitize the emission of NdIII cations as confirmed by the emission spectrum, due to the mismatch of the energy gap between 3T1u → 1A1g (21.57 × 103 cm-1) of arsenotungstate components and 4F3/2 → 4I9/2 (11.43 × 103 cm-1) of NdIII cations. Magnetic studies of 1 demonstrate its field-induced single-molecule magnet (SMM) behavior. Direct current magnetic susceptibility studies imply the weak ferromagnetic couplings present between the two neighboring NdIII cations. In addition, the synergy between the coordination configuration of NdIII cations and the intramolecular magnetic interaction was discussed.
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Affiliation(s)
- Hanhan Chen
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China.
| | - Lin Sun
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China.
| | - Kangting Zheng
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China.
| | - Jinpeng Zhang
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China.
| | - Pengtao Ma
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China.
| | - Jingping Wang
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China.
| | - Jingyang Niu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China.
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Dey S, Rajaraman G. In silico design criteria for high blocking barrier uranium (III) SIMs. Chem Commun (Camb) 2022; 58:6817-6820. [PMID: 35615940 DOI: 10.1039/d2cc01356h] [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
A combination of DFT and ab initio CASSCF/PT2 calculations on U(III) fictitious models and numerous reported X-ray structures unveils several geometries from coordination number 1 to 12 that can be targeted to design potential U(III) SIMs with attractive barrier heights. Among the geometries studied, the T-shaped and capped pentagonal antiprism geometries yield values exceeding 1500 cm-1 - a value that is elusive for any uranium SIMs.
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Affiliation(s)
- Sourav Dey
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India.
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India.
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Borah A, Murugavel R. Magnetic relaxation in single-ion magnets formed by less-studied lanthanide ions Ce(III), Nd(III), Gd(III), Ho(III), Tm(II/III) and Yb(III). Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2021.214288] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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9
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Modder DK, Batov MS, Rajeshkumar T, Sienkiewicz A, Zivkovic I, Scopelliti R, Maron L, Mazzanti M. Assembling Diuranium Complexes in Different States of Charge with a Bridging Redox-Active Ligand. Chem Sci 2022; 13:11294-11303. [PMID: 36320571 PMCID: PMC9533398 DOI: 10.1039/d2sc03592h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 08/30/2022] [Indexed: 11/21/2022] Open
Abstract
Radical-bridged diuranium complexes are desirable for their potential high exchange coupling and single molecule magnet (SMM) behavior, but remain rare. Here we report for the first time radical-bridged diuranium(iv) and diuranium(iii) complexes. Reaction of [U{N(SiMe3)2}3] with 2,2′-bipyrimidine (bpym) resulted in the formation of the bpym-bridged diuranium(iv) complex [{((Me3Si)2N)3UIV}2(μ-bpym2−)], 1. Reduction with 1 equiv. KC8 reduces the complex, affording [K(2.2.2-cryptand)][{((Me3Si)2N)3U}2(μ-bpym)], 2, which is best described as a radical-bridged UIII–bpym˙−–UIII complex. Further reduction of 1 with 2 equiv. KC8, affords [K(2.2.2-cryptand)]2[{((Me3Si)2N)3UIII}2(μ-bpym2−)], 3. Addition of AgBPh4 to complex 1 resulted in the oxidation of the ligand, yielding the radical-bridged complex [{((Me3Si)2N)3UIV}2(μ-bpym˙−)][BPh4], 4. X-ray crystallography, electrochemistry, susceptibility data, EPR and DFT/CASSCF calculations are in line with their assignments. In complexes 2 and 4 the presence of the radical-bridge leads to slow magnetic relaxation. Convenient routes to dinuclear complexes of uranium where two uranium centers are bridged by the redox-active ligand bpym were identified resulting in unique and stable radical-bridged dimetallic complexes of U(iii) and U(iv) showing SMM behaviour.![]()
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Affiliation(s)
- Dieuwertje K Modder
- Group of Coordination Chemistry, Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Mikhail S Batov
- Group of Coordination Chemistry, Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Thayalan Rajeshkumar
- Laboratoire de Physique et Chimie des Nano-objets, Institut National des Sciences Appliquées Cedex 4 31077 Toulouse France
| | - Andrzej Sienkiewicz
- Laboratory for Quantum Magnetism, Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
- ADSresonances Sàrl Route de Genève 60B 1028 Préverenges Switzerland
| | - Ivica Zivkovic
- Laboratory for Quantum Magnetism, Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Rosario Scopelliti
- Group of Coordination Chemistry, Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Laurent Maron
- Laboratoire de Physique et Chimie des Nano-objets, Institut National des Sciences Appliquées Cedex 4 31077 Toulouse France
| | - Marinella Mazzanti
- Group of Coordination Chemistry, Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
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11
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Mayans J, Tesi L, Briganti M, Boulon ME, Font-Bardia M, Escuer A, Sorace L. Single-Ion Anisotropy and Intramolecular Interactions in Ce III and Nd III Dimers. Inorg Chem 2021; 60:8692-8703. [PMID: 34110135 PMCID: PMC8277162 DOI: 10.1021/acs.inorgchem.1c00647] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Indexed: 12/11/2022]
Abstract
This article reports the syntheses, characterization, structural description, together with magnetic and spectroscopic properties of two isostructural molecular magnets based on the chiral ligand N,N'-bis((1,2-diphenyl-(pyridine-2-yl)methylene)-(R,R/S,S)-ethane-1,2-diamine), L1, of general formula [Ln2(RR-L1)2(Cl6)]·MeOH·1.5H2O, (Ln = Ce (1) or Nd (2)). Multifrequency electron paramagnetic resonance (EPR), cantilever torque magnetometry (CTM) measurements, and ab initio calculations allowed us to determine single-ion magnetic anisotropy and intramolecular magnetic interactions in both compounds, evidencing a more important role of the anisotropic exchange for the NdIII derivative. The comparison of experimental and theoretical data indicates that, in the case of largely rhombic lanthanide ions, ab initio calculations can fail in determining the orientation of the weakest components, while being reliable in determining their principal values. However, they remain of paramount importance to set the analysis of EPR and CTM on sound basis, thus obtaining a very precise picture of the magnetic interactions in these systems. Finally, the electronic structure of the two complexes, as obtained by this approach, is consistent with the absence of zero-field slow relaxation observed in ac susceptibility.
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Affiliation(s)
- Júlia Mayans
- Departament
de Química Inorgànica i Orgànica, Secció
Inorgànica and Institute of Nanoscience and Nanotechnology
(INUB), Universitat de Barcelona, Martí i Franques 1-11, Barcelona-08028, Spain
| | - Lorenzo Tesi
- Dipartimento
di Chimica “Ugo Schiff” & INSTM RU, Università degli Studi di Firenze, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (Firenze), Italy
| | - Matteo Briganti
- Dipartimento
di Chimica “Ugo Schiff” & INSTM RU, Università degli Studi di Firenze, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (Firenze), Italy
| | - Marie-Emmanuelle Boulon
- Dipartimento
di Chimica “Ugo Schiff” & INSTM RU, Università degli Studi di Firenze, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (Firenze), Italy
| | - Mercè Font-Bardia
- Unitat
de Difracció de R-X, Centre Científic i Tecnològic
de la Universitat de Barcelona (CCiTUB), Universitat de Barcelona, Solé i Sabarís 1-3, 08028 Barcelona, Spain
| | - Albert Escuer
- Departament
de Química Inorgànica i Orgànica, Secció
Inorgànica and Institute of Nanoscience and Nanotechnology
(INUB), Universitat de Barcelona, Martí i Franques 1-11, Barcelona-08028, Spain
| | - Lorenzo Sorace
- Dipartimento
di Chimica “Ugo Schiff” & INSTM RU, Università degli Studi di Firenze, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (Firenze), Italy
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Vicente R, Tubau À, Speed S, Mautner FA, Bierbaumer F, Fischer RC, Massoud SS. Slow magnetic relaxation and luminescence properties in neodymium( iii)-4,4,4-trifluoro-1-(2-naphthyl)butane-1,3-dionato complexes incorporating bipyridyl ligands. NEW J CHEM 2021. [DOI: 10.1039/d1nj02583j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A new series of eight-coordinated Nd(iii) complexes derived from 4,4,4-trifluoro-1-(naphthalen-2-yl)butane-1,3-dionate and bi-pyridyl ligands revealed multifunctional molecular materials as photoluminescent single-molecule magnets (SMMs).
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Affiliation(s)
- Ramon Vicente
- Departament de Química Inorgànica i Orgànica
- Universitat de Barcelona
- E-31321 Barcelona
- Spain
| | - Ànnia Tubau
- Departament de Química Inorgànica i Orgànica
- Universitat de Barcelona
- E-31321 Barcelona
- Spain
| | - Saskia Speed
- Departament de Química Inorgànica i Orgànica
- Universitat de Barcelona
- E-31321 Barcelona
- Spain
| | - Franz A. Mautner
- Institut für Physikalische and Theoretische Chemie
- Technische Universität Graz
- A-8010 Graz
- Austria
| | - Florian Bierbaumer
- Institut für Physikalische and Theoretische Chemie
- Technische Universität Graz
- A-8010 Graz
- Austria
| | - Roland C. Fischer
- Institut für Anorganische Chemie
- Technische Universität Graz
- A-8010 Graz
- Austria
| | - Salah S. Massoud
- Department of Chemistry
- University of Louisiana at Lafayette
- Lafayette
- USA
- Department of Chemistry
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13
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Windorff CJ, Sperling JM, Albrecht-Schönzart TE, Bai Z, Evans WJ, Gaiser AN, Gaunt AJ, Goodwin CAP, Hobart DE, Huffman ZK, Huh DN, Klamm BE, Poe TN, Warzecha E. A Single Small-Scale Plutonium Redox Reaction System Yields Three Crystallographically-Characterizable Organoplutonium Complexes. Inorg Chem 2020; 59:13301-13314. [PMID: 32910649 DOI: 10.1021/acs.inorgchem.0c01671] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An approach to obtaining substantial amounts of data from a hazardous starting material that can only be obtained and handled in small quantities is demonstrated by the investigation of a single small-scale reaction of cyclooctatetraene, C8H8, with a solution obtained from the reduction of Cp'3Pu (Cp' = C5H4SiMe3) with potassium graphite. This one reaction coupled with oxidation of a product has provided single-crystal X-ray structural data on three organoplutonium compounds as well as information on redox chemistry thereby demonstrating an efficient route to new reactivity and structural information on this highly radioactive element. The crystal structures were obtained from the reduction of C8H8 by a putative Pu(II) complex, (Cp'3PuII)1-, generated in situ, to form the Pu(III) cyclooctatetraenide complex, [K(crypt)][(C8H8)2PuIII], 1-Pu, and the tetra(cyclopentadienyl) Pu(III) complex, [K(crypt)][Cp'4PuIII], 2-Pu. Oxidation of the sample of 1-Pu with Ag(I) afforded a third organoplutonium complex that has been structurally characterized for the first time, (C8H8)2PuIV, 3-Pu. Complexes 1-Pu and 3-Pu contain Pu sandwiched between parallel (C8H8)2- rings. The (Cp'4PuIII)- anion in 2-Pu features three η5-Cp' rings and one η1-Cp' ring, which is a rare example of a formal Pu-C η1-bond. In addition, this study addresses the challenge of small-scale synthesis imparted by radiological and material availability of transuranium isotopes, in particular that of pure metal samples. A route to an anhydrous Pu(III) starting material from the more readily available PuIVO2 was developed to facilitate reproducible syntheses and allow complete spectroscopic analysis of 1-Pu and 2-Pu. PuIVO2 was converted to PuIIIBr3(DME)2 (DME = CH3OCH2CH2OCH3) and subsequently PuIIIBr3(THF)x, which was used to independently synthesize 1-Pu, 2-Pu, and 3-Pu.
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Affiliation(s)
- Cory J Windorff
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States.,Department of Chemistry, University of California-Irvine, Irvine, California 92697, United States.,Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Joseph M Sperling
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Thomas E Albrecht-Schönzart
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Zhuanling Bai
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - William J Evans
- Department of Chemistry, University of California-Irvine, Irvine, California 92697, United States
| | - Alyssa N Gaiser
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Andrew J Gaunt
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Conrad A P Goodwin
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - David E Hobart
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Zachary K Huffman
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Daniel N Huh
- Department of Chemistry, University of California-Irvine, Irvine, California 92697, United States
| | - Bonnie E Klamm
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Todd N Poe
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Evan Warzecha
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
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14
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Díaz-Ortega IF, Herrera JM, Dey S, Nojiri H, Rajaraman G, Colacio E. The effect of the electronic structure and flexibility of the counteranions on magnetization relaxation in [Dy(L)2(H2O)5]3+ (L = phosphine oxide derivative) pentagonal bipyramidal SIMs. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01412h] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The effects of the electronic structure and flexibility of triflate anions in a new high-Ueff TBPY-7 SMM, [Dy(OPCy3)2(H2O)5](CF3SO3)3·2OPCy3, have been analyzed.
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Affiliation(s)
- Ismael F. Díaz-Ortega
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- Granada
- Spain
| | - Juan Manuel Herrera
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- Granada
- Spain
| | - Sourav Dey
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Hiroyuki Nojiri
- Institute for Materials Research
- Tohoku University
- Sendai
- Japan
| | - Gopalan Rajaraman
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Enrique Colacio
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- Granada
- Spain
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15
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In silico design of pseudo D5h actinide based molecular magnets: role of covalency in magnetic anisotropy. J CHEM SCI 2019. [DOI: 10.1007/s12039-019-1705-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Gupta SK, Shanmugan S, Rajeshkumar T, Borah A, Damjanović M, Schulze M, Wernsdorfer W, Rajaraman G, Murugavel R. A single-ion single-electron cerrous magnet. Dalton Trans 2019; 48:15928-15935. [PMID: 31513208 DOI: 10.1039/c9dt03052b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we present monometallic Ln(iii) complexes [L3Ln(NO3)3] [where Ln = Ce (1) and La (2)] assembled from a simple reaction of the respective lanthanide nitrate hydrate and a bulky phosphonic diamide tBuPO(NHiPr)2 ligand (L), where complex 1 behaves as a single-ion single-electron magnet under a small applied magnetic field. The Ce(iii) ion occupies a nine-coordinate distorted muffin-like coordination environment. The combination of direct and Raman process dominates the relaxation dynamics in 1 under the applied dc field. The low-temperature measurements performed with oriented crystals on a micro-SQUID setup exhibits strong tunnelling at zero-field, consistent with the theoretical results where strong mixing of the ground state with higher excited mJ levels is detected and also throws additional insights on the relaxation dynamics of 1. Ab initio calculations have been performed to understand the origin of anisotropy and models have been proposed for future directions.
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Affiliation(s)
- Sandeep K Gupta
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai-400076, India.
| | - Swaminathan Shanmugan
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai-400076, India. and Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Kancheepuram 603203, Tamil Nadu, India
| | - Thayalan Rajeshkumar
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai-400076, India.
| | - Aditya Borah
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai-400076, India.
| | - Marko Damjanović
- Physikalisches Institut, Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Strasse 1, 76131 Karlsruhe; Institute of Nanotechnology, KIT, Hermann-von-Helmholz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Michael Schulze
- Physikalisches Institut, Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Strasse 1, 76131 Karlsruhe; Institute of Nanotechnology, KIT, Hermann-von-Helmholz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Wolfgang Wernsdorfer
- Physikalisches Institut, Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Strasse 1, 76131 Karlsruhe; Institute of Nanotechnology, KIT, Hermann-von-Helmholz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai-400076, India.
| | - Ramaswamy Murugavel
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai-400076, India.
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17
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Bartolomé E, Arauzo A, Luzón J, Melnic S, Shova S, Prodius D, Nlebedim IC, Bartolomé F, Bartolomé J. High relaxation barrier in neodymium furoate-based field-induced SMMs. Dalton Trans 2019; 48:15386-15396. [PMID: 31257389 DOI: 10.1039/c9dt02047k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new neodymium molecular magnets of formula {[Nd(α-fur)3(H2O)2]·DMF}n (1) and {[Nd0.065La0.935(α-fur)3(H2O)2]}n (2), α-fur = C4H3OCOO, have been synthesized. In (1) the furoate ligands, in bidentate bridging mode, consolidate zig-zag chains running along the a-direction. Compound (2) is a magnetically diluted complex of a polymeric chain along the b-axis. Heat capacity, dc magnetization and ac susceptibility measurements have been performed from 1.8 K up to room temperature. Ab initio calculations yielded the gyromagnetic factors gx* = 0.52, gy* = 1.03, gz* = 4.41 for (1) and gx* = 1.35, gy* = 1.98, gz* = 3.88 for (2), and predicted energy gaps of Δ/kB = 125.5 K (1) and Δ/kB = 58.8 K (2). Heat capacity and magnetometry measurements agree with these predictions, and confirm the non-negligible transversal anisotropy of the Kramers doublet ground state. A weak intrachain antiferromagnetic interaction J'/kB = -3.15 × 10-3 K was found for (1). No slow relaxation is observed at H = 0, attributed to the sizable transverse anisotropy component, and/or dipolar or exchange interactions enhancing the quantum tunnelling probability. Under an external applied field as small as 80 Oe, two slow relaxation processes appear: above 3 K the first relaxation mechanism is associated to a combination of Orbach process, with a sizeable activation energy U/kB = 121 K at 1.2 kOe for (1), Raman and direct processes; the second, slowest relaxation mechanism is associated to a direct process, affected by phonon-bottleneck effect. For complex (2) a smaller U/kB = 61 K at 1.2 kOe is found, together with larger g*-transversal terms, and the low-frequency process is quenched. The reported complexes represent rare polymeric Nd single-ion magnets exhibiting high activation energies among the scarce Nd(iii) family.
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Affiliation(s)
- E Bartolomé
- Escola Universitària Salesiana de Sarrià (EUSS), Passeig Sant Joan Bosco 74, 08017-Barcelona, Spain.
| | - A Arauzo
- Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain and Servicio de Medidas Físicas. Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - J Luzón
- Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain and Centro Universitario de la Defensa. Academia General Militar, Zaragoza, Spain
| | - S Melnic
- Institute of Chemistry, Academy of Sciences of Moldova, Academiei 3, MD-2028, Chisinau, Republic of Moldova
| | - S Shova
- "Petru Poni" Institute of Macromolecular Chemistry, Alea Gr. Ghica Voda 41A, 700487 Iasi, Romania
| | - D Prodius
- Ames Laboratory, US Department of Energy and Critical Materials Institute, Ames, IA-50011-3020, USA
| | - I C Nlebedim
- Ames Laboratory, US Department of Energy and Critical Materials Institute, Ames, IA-50011-3020, USA
| | - F Bartolomé
- Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - J Bartolomé
- Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
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18
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Casanovas B, Speed S, Maury O, Font-Bardía M, Vicente R. Homodinuclear lanthanide 9-anthracenecarboxylate complexes: Field induced SMM and NIR-luminescence. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.05.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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19
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Teyar B, Boucenina S, Belkhiri L, Le Guennic B, Boucekkine A, Mazzanti M. Theoretical Investigation of the Electronic Structure and Magnetic Properties of Oxo-Bridged Uranyl(V) Dinuclear and Trinuclear Complexes. Inorg Chem 2019; 58:10097-10110. [PMID: 31287673 DOI: 10.1021/acs.inorgchem.9b01237] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The uranyl(V) complexes [UO2(dbm)2K(18C6)]2 (dbm = dibenzoylmethanate) and [UO2(L)]3(L = 2-(4-tolyl)-1,3-bis(quinolyl)malondiiminate), exhibiting diamond-shaped U2O2 and triangular-shaped U3O3 cores respectively with 5f1-5f1 and 5f1-5f1-5f1 configurations, have been investigated using relativistic density functional theory (DFT). The bond order and QTAIM analyses reveal that the covalent contribution to the bonding within the oxo cores is slightly more important for U3O3 than for U2O2, in line with the shorter U-O distances existing in the trinuclear complex in comparison to those in the binuclear complex. Using the broken symmetry (BS) approach combined with the B3LYP functional for the calculation of the magnetic exchange coupling constants (J) between the magnetic centers, the antiferromagnetic (AF) character of these complexes was confirmed, the estimated J values being respectively equal to -24.1 and -7.2 cm-1 for the dioxo and trioxo species. It was found that the magnetic exchange is more sensitive to small variations of the core geometry of the dioxo species in comparison to the trioxo species. Although the robust AF exchange coupling within the UxOx cores is generally maintained when small variations of the UOU angle are applied, a weak ferromagnetic character appears in the dioxo species when this angle is higher than 114°, its value for the actual structure being equal to 105.9°. The electronic factors driving the magnetic coupling are discussed.
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Affiliation(s)
- Billel Teyar
- Faculté des Sciences Exactes , Université des Frères Mentouri , Laboratoire de Physique Mathématique et Subatomique LPMS, 25017 Constantine , Algeria.,Université Ziane Achour de Djelfa , 17000 Djelfa , Algeria
| | - Seddik Boucenina
- Faculté des Sciences Exactes , Université des Frères Mentouri , Laboratoire de Physique Mathématique et Subatomique LPMS, 25017 Constantine , Algeria
| | - Lotfi Belkhiri
- Faculté des Sciences Exactes , Université des Frères Mentouri , Laboratoire de Physique Mathématique et Subatomique LPMS, 25017 Constantine , Algeria
| | | | | | - Marinella Mazzanti
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland
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20
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Synthesis, structures and magnetic properties of [(η 9-C 9H 9)Ln(η 8-C 8H 8)] super sandwich complexes. Nat Commun 2019; 10:3135. [PMID: 31316061 PMCID: PMC6637141 DOI: 10.1038/s41467-019-10976-6] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Accepted: 06/10/2019] [Indexed: 11/09/2022] Open
Abstract
Sandwich complexes are an indispensable part of organometallic chemistry, which is becoming increasingly important in the field of lanthanide-based single molecule magnets. Herein, a fundamental class of pure sandwich complexes, [(η9-C9H9)Ln(η8-C8H8)] (Ln=Nd, Sm, Dy, Er), is reported. These neutral and sandwiched lanthanide compounds exclusively contain fully π-coordinated coplanar eight and nine membered CH rings. The magnetic properties of these compounds are investigated, leading to the observation of slow relaxation of the magnetization, including open hysteresis loops up to 10 K for the Er(III) analogue. Fast relaxation of the magnetization is likewise observed near zero field, a highly important characteristic for quantum information processing schemes. Our synthetic strategy is straightforward and utilizes the reaction of [(η8-C8H8)LnI(thf)n] complexes with [K(C9H9)]. Although all compounds are fully characterized, structural details of the title compounds can also be deduced by Raman spectroscopy only.
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21
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Guo F, Chen Y, Tong M, Mansikkamäki A, Layfield RA. Uranocenium: Synthesis, Structure, and Chemical Bonding. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903681] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Fu‐Sheng Guo
- Department of ChemistryUniversity of Sussex Falmer Brighton BN1 9QR UK
| | - Yan‐Cong Chen
- Key Laboratory of Bioinorganic and Synthetic Chemistry of the Ministry of EducationSchool of ChemistrySun Yat-Sen University Guangzhou 510275 P. R. China
| | - Ming‐Liang Tong
- Key Laboratory of Bioinorganic and Synthetic Chemistry of the Ministry of EducationSchool of ChemistrySun Yat-Sen University Guangzhou 510275 P. R. China
| | - Akseli Mansikkamäki
- Department of Chemistry, Nanoscience CenterUniversity of Jyväskylä P.O. Box 35 Jyväskylä 40014 Finland
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22
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Guo FS, Chen YC, Tong ML, Mansikkamäki A, Layfield RA. Uranocenium: Synthesis, Structure, and Chemical Bonding. Angew Chem Int Ed Engl 2019; 58:10163-10167. [PMID: 31034690 DOI: 10.1002/anie.201903681] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Indexed: 11/10/2022]
Abstract
Abstraction of iodide from [(η5 -C5 i Pr5 )2 UI] (1) produced the cationic uranium(III) metallocene [(η5 -C5 i Pr5 )2 U]+ (2) as a salt of [B(C6 F5 )4 ]- . The structure of 2 consists of unsymmetrically bonded cyclopentadienyl ligands and a bending angle of 167.82° at uranium. Analysis of the bonding in 2 showed that the uranium 5f orbitals are strongly split and mixed with the ligand orbitals, thus leading to non-negligible covalent contributions to the bonding. Investigation of the dynamic magnetic properties of 2 revealed that the 5f covalency leads to partially quenched anisotropy and fast magnetic relaxation in zero applied magnetic field. Application of a magnetic field leads to dominant relaxation by a Raman process.
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Affiliation(s)
- Fu-Sheng Guo
- Department of Chemistry, University of Sussex, Falmer, Brighton, BN1 9QR, UK
| | - Yan-Cong Chen
- Key Laboratory of Bioinorganic and Synthetic Chemistry of the Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Ming-Liang Tong
- Key Laboratory of Bioinorganic and Synthetic Chemistry of the Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Akseli Mansikkamäki
- Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, Jyväskylä, 40014, Finland
| | - Richard A Layfield
- Department of Chemistry, University of Sussex, Falmer, Brighton, BN1 9QR, UK
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23
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Dey S, Velmurugan G, Rajaraman G. How important is the coordinating atom in controlling magnetic anisotropy in uranium(iii) single-ion magnets? A theoretical perspective. Dalton Trans 2019; 48:8976-8988. [PMID: 31145395 DOI: 10.1039/c9dt01869g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Theoretical investigation of actinide based nanomagnets is of paramount interest in the field of molecular magnetism as they offer remarkable properties compared to their lanthanide counterparts. Unlike lanthanides, the magnetic properties of actinides can be fine-tuned by modulating the ligand field as they possess a large metal-ligand covalency. In this regard, two complexes reported earlier have gained attention: [U(BcMe)3] (1) has been found to show Single-ion Magnet (SIM) characteristics whereas isomeric [U(BpMe)3] (2) does not exhibit any SIM behaviour. To unravel the origin of the differences observed in magnetic anisotropy, a detailed ab initio CASSCF study has been undertaken on the X-ray structure of complexes 1 and 2. Since actinide compounds exhibit strong covalency, the desired active space needs to be benchmarked to address this issue. Here, we have enlarged the active space systematically from CAS(3,7) to CAS(3,12) where all 5f electrons in 5f orbitals are sequentially expanded to include five formally empty 6d orbitals. Our calculations reveal that the incorporation of the 6dz2 orbital is vital in reproducing many experimental observables such as temperature dependent susceptibility, g-factors, ground state mJ level, and ground-state-excited-state gap. Inclusion of this orbital in the reference space is found to describe better the UH-BH agostic interactions leading to significant variations in the computed parameters. Gaining from this understanding, we have carried out extensive bonding analysis within the DFT framework using tools such as Natural Bond Orbital (NBO) and Atoms In Molecule (AIM) to further probe these weak agostic interactions. Also, predictions to enhance the U-ligand covalency using U-sulphur bonds and the role of the U-C distance and C-U-C bite angles in the nature of anisotropy have been studied, and relevant magneto-structural correlations have been developed. Thus our results for the first time provide a comprehensive understanding of uranium based SMMs and offer ways to fine tune the anisotropy for experimental chemists.
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Affiliation(s)
- Sourav Dey
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India.
| | | | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India.
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24
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Guo FS, Bar AK, Layfield RA. Main Group Chemistry at the Interface with Molecular Magnetism. Chem Rev 2019; 119:8479-8505. [PMID: 31059235 DOI: 10.1021/acs.chemrev.9b00103] [Citation(s) in RCA: 121] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Innovative synthetic coordination and, increasingly, organometallic chemistry are at the heart of advances in molecular magnetism. Smart ligand design is essential for implementing controlled modifications to the electronic structure and magnetic properties of transition metal and f-element compounds, and many important recent developments use nontraditional ligands based on low-coordinate main group elements to drive the field forward. This review charts progress in molecular magnetism from the perspective of ligands in which the donor atoms range from low-coordinate 2p elements-particularly carbon but also boron and nitrogen-to the heavier p-block elements such as phosphorus, arsenic, antimony, and even bismuth. Emphasis is placed on the role played by novel main group ligands in addressing magnetic anisotropy of transition metal and f-element compounds, which underpins the development of single-molecule magnets (SMMs), a family of magnetic materials that can retain magnetization in the absence of a magnetic field below a blocking temperature. Nontraditional p-block donor atoms, with their relatively diffuse valence orbitals and more diverse bonding characteristics, also introduce scope for tuning the spin-orbit coupling properties and metal-ligand covalency in molecular magnets, which has implications in areas such as magnetic exchange coupling and spin crossover phenomena. The chemistry encompasses transition metals, lanthanides, and actinides and describes recently discovered molecular magnets that can be regarded, currently, as defining the state of the art. This review identifies that main group chemistry at the interface molecular magnetism is an area with huge potential to deliver new types of molecular magnets with previously unseen properties and applications.
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Affiliation(s)
- Fu-Sheng Guo
- Department of Chemistry, School of Life Sciences , University of Sussex , Brighton BN1 9QJ , United Kingdom
| | - Arun Kumar Bar
- Department of Chemistry, School of Life Sciences , University of Sussex , Brighton BN1 9QJ , United Kingdom
| | - Richard A Layfield
- Department of Chemistry, School of Life Sciences , University of Sussex , Brighton BN1 9QJ , United Kingdom
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25
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Abstract
Recent developments and results from the organometallic chemistry of the actinides are reviewed. In the last one and a half years the structural data of about 15 organometallic complexes of transuranium actinides (Np or Pu) have been published, all involving π-ligands in the coordination sphere of the metal ion. On the basis of these data, a comparison of these molecules is presented. Depending on the steric demands of the ligands, effects like the actinide contraction seem to be stronger or weaker in the structural features. This indicates that the interplay between the actinide ion and the π-ligand is rather flexible, enabling the formation of stable bonds over a broad range of actinide ion oxidation states.
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Affiliation(s)
- Olaf Walter
- European Commission–Joint Research CentreDirectorate for Nuclear Safety and Security–G. I. 5Postfach 234076125KarlsruheGermany
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26
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Abstract
Over the past 25 years, magnetic actinide complexes have been the object of considerable attention, not only at the experimental level, but also at the theoretical one. Such systems are of great interest, owing to the well-known larger spin–orbit coupling for actinide ions, and could exhibit slow relaxation of the magnetization, arising from a large anisotropy barrier, and magnetic hysteresis of purely molecular origin below a given blocking temperature. Furthermore, more diffuse 5f orbitals than lanthanide 4f ones (more covalency) could lead to stronger magnetic super-exchange. On the other hand, the extraordinary experimental challenges of actinide complexes chemistry, because of their rarity and toxicity, afford computational chemistry a particularly valuable role. However, for such a purpose, the use of a multiconfigurational post-Hartree-Fock approach is required, but such an approach is computationally demanding for polymetallic systems—notably for actinide ones—and usually simplified models are considered instead of the actual systems. Thus, Density Functional Theory (DFT) appears as an alternative tool to compute magnetic exchange coupling and to explore the electronic structure and magnetic properties of actinide-containing molecules, especially when the considered systems are very large. In this paper, relevant achievements regarding DFT investigations of the magnetic properties of actinide complexes are surveyed, with particular emphasis on some representative examples that illustrate the subject, including actinides in Single Molecular Magnets (SMMs) and systems featuring metal-metal super-exchange coupling interactions. Examples are drawn from studies that are either entirely computational or are combined experimental/computational investigations in which the latter play a significant role.
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27
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Wang J, Ruan ZY, Li QW, Chen YC, Huang GZ, Liu JL, Reta D, Chilton NF, Wang ZX, Tong ML. Slow magnetic relaxation in a {EuCu5} metallacrown. Dalton Trans 2019; 48:1686-1692. [DOI: 10.1039/c8dt04814b] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A {EuIIICu5} metallacrown displays field-induced slow magnetic relaxation, in which the EuIII with diamagnetic ground state enhances the relaxation rates.
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Affiliation(s)
- Jin Wang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Ze-Yu Ruan
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Quan-Wen Li
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Yan-Cong Chen
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Guo-Zhang Huang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Jun-Liang Liu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Daniel Reta
- School of Chemistry
- The University of Manchester
- Manchester M13 9PL
- UK
| | | | - Zhen-Xing Wang
- Wuhan National High Magnetic Center
- Huazhong University of Science and Technology
- Wuhan 430074
- P. R. China
| | - Ming-Liang Tong
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
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28
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Higgins RF, Tatebe CJ, Bart SC, Shores MP. Excited-state effects on magnetic properties of U( iii) and U( iv) pyrazolylborate complexes. Chem Commun (Camb) 2019; 55:10611-10614. [DOI: 10.1039/c9cc04800f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
For a family of uranium pyrazolylborate complexes, we observe correlations between excited-state mixing and slow relaxation of magnetization for U(iii) complexes, and U⋯B distances in U(iv) complexes.
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Affiliation(s)
| | - Caleb J. Tatebe
- H. C. Brown Laboratory
- Department of Chemistry
- Purdue University
- West Lafayette
- USA
| | - Suzanne C. Bart
- H. C. Brown Laboratory
- Department of Chemistry
- Purdue University
- West Lafayette
- USA
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29
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He M, Chen X, Bodenstein T, Nyvang A, Schmidt SFM, Peng Y, Moreno-Pineda E, Ruben M, Fink K, Gamer MT, Powell AK, Roesky PW. Enantiopure Benzamidinate/Cyclooctatetraene Complexes of the Rare-Earth Elements: Synthesis, Structure, and Magnetism. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00412] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Meng He
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Xiao Chen
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Tilmann Bodenstein
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
- Institut für Nanotechnologie, Karlsruher Institut für Technologie (KIT), Postfach 3640, 76021 Karlsruhe, Germany
| | - Andreas Nyvang
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
| | - Sebastian F. M. Schmidt
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Yan Peng
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
- Institut für Nanotechnologie, Karlsruher Institut für Technologie (KIT), Postfach 3640, 76021 Karlsruhe, Germany
| | - Eufemio Moreno-Pineda
- Institut für Nanotechnologie, Karlsruher Institut für Technologie (KIT), Postfach 3640, 76021 Karlsruhe, Germany
| | - Mario Ruben
- Institut für Nanotechnologie, Karlsruher Institut für Technologie (KIT), Postfach 3640, 76021 Karlsruhe, Germany
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS-Université de Strasbourg, 23 rue du Loess, BP 43, Strasbourg CEDEX 2 F-67034, France
| | - Karin Fink
- Institut für Nanotechnologie, Karlsruher Institut für Technologie (KIT), Postfach 3640, 76021 Karlsruhe, Germany
| | - Michael T. Gamer
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Annie K. Powell
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
- Institut für Nanotechnologie, Karlsruher Institut für Technologie (KIT), Postfach 3640, 76021 Karlsruhe, Germany
| | - Peter W. Roesky
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
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30
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Closing the Circle of the Lanthanide-Murexide Series: Single-Molecule Magnet Behavior and Near-Infrared Emission of the NdIII Derivative. MAGNETOCHEMISTRY 2018. [DOI: 10.3390/magnetochemistry4040044] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Up to now, even if murexide-based complexometric studies are performed with all 3d or 4f ions, the crystal structures of the light-lanthanide derivatives of the lanthanide-murexide series are unknown. In this work, we report the crystal structure of the NdIII derivative named NdMurex. Contrary to all known complexes of the 3d or 4f series, a dimeric compound was obtained. As for its already reported DyIII and YbIII parents, the NdIII complex responsible for the color-change behaves as a single-molecule magnet (SMM). This behavior was observed on both the crystalline (NdMurex: Ueff = 6.20(0.80) K, 4.31 cm−1; τ0 = 2.20(0.92) × 10−5 s, Hdc = 1200 Oe) and anhydrous form (NdMurexAnhy: Ueff = 6.25(0.90) K, 4.34 cm−1; τ0 = 4.85(0.40) × 10−5 s, Hdc = 1200 Oe). The SMM behavior is reported also for the anhydrous CeIII derivative (CeMurexAnhy: Ueff = 5.40(0.75) K, 3.75 cm−1; τ0 = 3.02(1.10) × 10−5 s, Hdc = 400 Oe). The Near-Infrared Emission NIR emission was observed for NdMurexAnhy and highlights its bifunctionality.
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31
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Casanovas B, Speed S, Maury O, El Fallah MS, Font-Bardía M, Vicente R. Dinuclear LnIIIComplexes with 9-Anthracenecarboxylate Showing Field-Induced SMM and Visible/NIR Luminescence. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800624] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Berta Casanovas
- Departament de Química Inorgànica i Orgànica; Secció de Química Inorgànica; Universitat de Barcelona; Martí i Franquès 1-11 08028 Barcelona Spain
| | - Saskia Speed
- Departament de Química Inorgànica i Orgànica; Secció de Química Inorgànica; Universitat de Barcelona; Martí i Franquès 1-11 08028 Barcelona Spain
- Univ. de Lyon, UMR 5182-CNRS-Ecole Normale Supérieure de Lyon; Secció de Química Inorgànica; Universtité de Lyon 1; 46 allée d'Italie 69007 Lyon France
| | - Olivier Maury
- Univ. de Lyon, UMR 5182-CNRS-Ecole Normale Supérieure de Lyon; Secció de Química Inorgànica; Universtité de Lyon 1; 46 allée d'Italie 69007 Lyon France
| | - Mohamed Salah El Fallah
- Departament de Química Inorgànica i Orgànica; Secció de Química Inorgànica; Universitat de Barcelona; Martí i Franquès 1-11 08028 Barcelona Spain
| | - Mercè Font-Bardía
- Departament de Mineralogia; Cristallografia i Dipòsits Minerals and; Universitat de Barcelona; Solé i Sabarís 1-3. 08028 Barcelona Spain
| | - Ramon Vicente
- Departament de Química Inorgànica i Orgànica; Secció de Química Inorgànica; Universitat de Barcelona; Martí i Franquès 1-11 08028 Barcelona Spain
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32
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Long J, Guari Y, Ferreira RA, Carlos LD, Larionova J. Recent advances in luminescent lanthanide based Single-Molecule Magnets. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.02.019] [Citation(s) in RCA: 150] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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33
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Solis-Céspedes E, Montenegro-Pohlhammer N, Páez-Hernández D. Theoretical insight into the superexchange mechanism of coupling in f1-f1 system. The case of study Ce2(COT)3 compound. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.03.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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34
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Jassal AK, Sran BS, Suffren Y, Bernot K, Pointillart F, Cador O, Hundal G. Structural diversity and photo-physical and magnetic properties of dimeric to 1D polymeric coordination polymers of lighter lanthanide(iii) dinitrobenzoates. Dalton Trans 2018. [PMID: 29537422 DOI: 10.1039/c7dt04596d] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Single crystal diffraction studies reveal the formation of the following 10 new complexes of lighter Ln(iii) ions with general formulas {[Ln(μ2-L1)3·(H2O)2]·H2O}n (Ln = Nd (1) and Eu (2)), [Nd(μ2-L2)2·(CH3COO)·(H2O)2]n (3), [Ln2(μ2-L2)5·(L2)·(H2O)4]n (Ln = Sm (4), Ce (5), and Pr (6)), [La2(μ2-L2)6·(H2O)3·(DMF)]n (7) (DMF = dimethylformamide), [Ln(μ2-L2)2·(L2)·(H2O)3]2 (Ln = Eu (8) and Gd (9)) and [Gd(L2)·(CH3COO)2·(H2O)2]2 (10), where L1 and L2 are anions of 3,5- and 2,4-dinitrobenzoic acid, respectively. Complexes 1-7 are 1D coordination polymers, while 8-10 are dinuclear complexes. The luminescence properties of Nd(iii) and Eu(iii) analogues displayed metal-centred emission with L1 exhibiting weak but more efficient sensitization than L2. A study of the magnetic properties of the compounds clearly demonstrated the field-induced single ion magnet behaviour of the Nd(iii) compounds 1 and 3. Their behaviour has been compared to previously reported analogous Nd(iii) complexes and the role of the lattice solvent and polymorphism on the magnetic behaviour has been evaluated.
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Affiliation(s)
- Amanpreet Kaur Jassal
- Department of Chemistry, UGC sponsored centre of advance studies-II, Guru Nanak Dev University, Amritsar-143005, Punjab, India.
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35
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Huang G, Fernandez-Garcia G, Badiane I, Camarra M, Freslon S, Guillou O, Daiguebonne C, Totti F, Cador O, Guizouarn T, Le Guennic B, Bernot K. Magnetic Slow Relaxation in a Metal-Organic Framework Made of Chains of Ferromagnetically Coupled Single-Molecule Magnets. Chemistry 2018; 24:6983-6991. [DOI: 10.1002/chem.201800095] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Gang Huang
- Univ. Rennes, INSA Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
| | - Guglielmo Fernandez-Garcia
- Univ. Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
- Laboratory of Molecular Magnetism (LaMM); Università degli studi di Firenze, INSTM unit; Via della lastruccia 3 50019 Sesto Fiorentino Italy
| | - Insa Badiane
- Univ. Rennes, INSA Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
- LCPM-Groupe “Matériaux Inorganiques: Chimie Douce et Cristallographie”; Université Assane Seck de Ziguinchor; BP 523 Ziguinchor Sénégal
| | - Magatte Camarra
- Univ. Rennes, INSA Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
- LCPM-Groupe “Matériaux Inorganiques: Chimie Douce et Cristallographie”; Université Assane Seck de Ziguinchor; BP 523 Ziguinchor Sénégal
| | - Stéphane Freslon
- Univ. Rennes, INSA Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
| | - Olivier Guillou
- Univ. Rennes, INSA Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
| | - Carole Daiguebonne
- Univ. Rennes, INSA Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
| | - Federico Totti
- Laboratory of Molecular Magnetism (LaMM); Università degli studi di Firenze, INSTM unit; Via della lastruccia 3 50019 Sesto Fiorentino Italy
| | - Olivier Cador
- Univ. Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
| | - Thierry Guizouarn
- Univ. Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
| | - Boris Le Guennic
- Univ. Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
| | - Kevin Bernot
- Univ. Rennes, INSA Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
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36
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Feng M, Tong ML. Single Ion Magnets from 3d to 5f: Developments and Strategies. Chemistry 2018; 24:7574-7594. [PMID: 29385282 DOI: 10.1002/chem.201705761] [Citation(s) in RCA: 230] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Indexed: 12/21/2022]
Abstract
Single-ion magnets (SIMs), exhibiting slow magnetization relaxation in the absence of the magnetic field, originate from their single spin-carrier centre. In pursuit of high-performance magnetic properties, such as high spin-reversal barrier and high blocking temperature, various metal centres were investigated to establish SIMs, including 3d and 5d transition metal ions, 4f lanthanide ions, and 5f actinide ions, which possess unique zero-field splitting and magnetic properties. Therefore, proper ligand field is of great importance to different types of metals. In the given great breakthroughs since the first SIM, [Pc2 Tb]- (Pc=dianion of phthalocyanine), was reported, strategies of ligand field design have emerged. In this review, the developments of SIMs with different metal centres are summarized, as well as the possible strategies.
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Affiliation(s)
- Min Feng
- Key Laboratory of Bioinorganic and Synthetic Chemistry, of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Ming-Liang Tong
- Key Laboratory of Bioinorganic and Synthetic Chemistry, of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
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37
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Demir S, Meihaus KR, Long JR. Slow magnetic relaxation in a neodymium metallocene tetraphenylborate complex. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2017.10.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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38
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Lorenz V, Liebing P, Rausch J, Blaurock S, Hrib CG, Hilfert L, Edelmann FT. Preparation and crystal structures of silyl-substituted potassium cyclooctatetraenides. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2017.08.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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39
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Braunschweig H, Damme A, Dück K, Krummenacher I, Paprocki V, Radacki K, Ramler J, Schiller C, Schneider C. Boryl- and Silyl-Substituted Mixed Sandwich Compounds of Scandium. Chemistry 2018; 24:2403-2409. [PMID: 29363206 DOI: 10.1002/chem.201704908] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Indexed: 11/10/2022]
Abstract
An improved, one-pot synthesis of the linear sandwich compound [Sc(η5 -C5 H5 )(η8 -C8 H8 )] is presented. The synthetic procedure is amenable to boryl- and silyl-substituted cyclopentadienyl and cyclooctatetraenyl ligands, thereby yielding the first functionalized derivatives. We found that the synthesis of the silyl-substituted mixed sandwich complexes produces higher yields when the ligand exchange is carried out stepwise, by isolating the intermediate trimethylsilylated half-sandwich complex [Sc(η8 -C8 H7 SiMe3 )Cl(THF)] (THF=tetrahydrofuran). The molecular structures of the parent complex, as well as of its mono-boryl-substituted derivatives, have been determined by single-crystal X-ray diffraction. In addition, the optical and electrochemical properties of the mixed sandwich complexes are reported.
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Affiliation(s)
- Holger Braunschweig
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Alexander Damme
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Klaus Dück
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Ivo Krummenacher
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Valerie Paprocki
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Krzysztof Radacki
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Jacqueline Ramler
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Carl Schiller
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Christoph Schneider
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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40
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Lorenz V, Liebing P, Bathelier A, Engelhardt F, Maron L, Hilfert L, Busse S, Edelmann FT. The “Wanderlust” of Me3Si groups in rare-earth triple-decker complexes: a combined experimental and computational study. Chem Commun (Camb) 2018; 54:10280-10283. [DOI: 10.1039/c8cc05317k] [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 migration of Me3Si groups (“Wanderlust”) in rare-earth triple-decker sandwich complexes of the type Ln2(COT′′)3 (COT′′ = bis(trimethylsilyl)cyclooctatetraenyl) has been elucidated by a combined experimental and computational study.
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Affiliation(s)
- Volker Lorenz
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
| | - Phil Liebing
- ETH Zürich
- Laboratorium für Anorganische Chemie
- 8093 Zürich
- Switzerland
| | - Adrien Bathelier
- Université de Toulouse
- INSA
- UPS
- CNRS-UMR5215
- LPCNO Avenue de Rangueil 135
| | - Felix Engelhardt
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
| | - Laurent Maron
- Université de Toulouse
- INSA
- UPS
- CNRS-UMR5215
- LPCNO Avenue de Rangueil 135
| | - Liane Hilfert
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
| | - Sabine Busse
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
| | - Frank T. Edelmann
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
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41
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Lorenz V, Liebing P, Böhme M, Buchholz A, Plass W, Geue N, Hilfert L, Busse S, Engelhardt F, Hrib CG, Edelmann FT. Lanthanide(III) Sandwich and Half‐Sandwich Complexes with Bulky Cyclooctatetraenyl Ligands: Synthesis, Structures, and Magnetic Properties. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700878] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Volker Lorenz
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Phil Liebing
- Laboratorium für Anorganische Chemie ETH Zürich Vladimir‐Prelog‐Weg 1–5/10 8093 Zürich Switzerland
| | - Michael Böhme
- Lehrstuhl für Anorganische Chemie II Friedrich‐Schiller‐Universität Jena 07743 Jena Germany
| | - Axel Buchholz
- Lehrstuhl für Anorganische Chemie II Friedrich‐Schiller‐Universität Jena 07743 Jena Germany
| | - Winfried Plass
- Lehrstuhl für Anorganische Chemie II Friedrich‐Schiller‐Universität Jena 07743 Jena Germany
| | - Niklas Geue
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Liane Hilfert
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Sabine Busse
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Felix Engelhardt
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Cristian G. Hrib
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Frank T. Edelmann
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
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Pointillart F, Cador O, Le Guennic B, Ouahab L. Uncommon lanthanide ions in purely 4f Single Molecule Magnets. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.12.017] [Citation(s) in RCA: 211] [Impact Index Per Article: 30.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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McAdams SG, Ariciu AM, Kostopoulos AK, Walsh JP, Tuna F. Molecular single-ion magnets based on lanthanides and actinides: Design considerations and new advances in the context of quantum technologies. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.03.015] [Citation(s) in RCA: 222] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Rausch J, Liebing P, Lorenz V, Hilfert L, Busse S, Maichle-Mössmer C, Edelmann FT. Scandium-Mediated Formation of a Bis(tetrahydropentalene). Angew Chem Int Ed Engl 2017; 56:7238-7241. [PMID: 28510295 DOI: 10.1002/anie.201703362] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Indexed: 11/10/2022]
Abstract
The reactivity of Li[Sc(COT'')2 ] (1; COT''=1,4-bis(trimethylsilyl)cyclooctatetraenyl) towards CoCl2 is considerably different from that of related lanthanide triple-decker sandwich complexes. In addition to the expected triple-decker complex Sc2 (COT'')3 (2), the complex Sc2 {μ-BTHP}(COT'')2 (3) is formed, which comprises the novel BTHP2- ligand (BTHP2- =bis(3,5-bis(trimethylsilyl)-1,3a,6,6a-tetrahydropentalene-1-yl)diide or bis(2,7-bis(trimethylsilyl)bicyclo[3.3.0]octa-2,7-dien-4-yl)diide, C16 H10 (SiMe3 )42- ). The formation of 3 is likely facilitated by the fact that scandium prefers η8 ,η3 coordination rather than highly symmetric η8 ,η8 coordination, and the η3 -coordinated COT'' ligand in 1 is activated owing to a loss of aromaticity. Acid hydrolysis of 3 leads to air-stable H2 BTHP (4).
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Affiliation(s)
- Janek Rausch
- Chemisches Institut der, Otto-von-Guericke-Universität, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Phil Liebing
- Chemisches Institut der, Otto-von-Guericke-Universität, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Volker Lorenz
- Chemisches Institut der, Otto-von-Guericke-Universität, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Liane Hilfert
- Chemisches Institut der, Otto-von-Guericke-Universität, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Sabine Busse
- Chemisches Institut der, Otto-von-Guericke-Universität, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Caecilia Maichle-Mössmer
- Institut für Anorganische Chemie, Eberhard-Karls-Universität Tübingen, Auf der Morgenstelle 18, 7, 2076, Tübingen, Germany
| | - Frank T Edelmann
- Chemisches Institut der, Otto-von-Guericke-Universität, Universitätsplatz 2, 39106, Magdeburg, Germany
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Rausch J, Liebing P, Lorenz V, Hilfert L, Busse S, Maichle-Mössmer C, Edelmann FT. Scandium-Mediated Formation of a Bis(tetrahydropentalene). Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Janek Rausch
- Chemisches Institut der; Otto-von-Guericke-Universität; Universitätsplatz 2 39106 Magdeburg Germany
| | - Phil Liebing
- Chemisches Institut der; Otto-von-Guericke-Universität; Universitätsplatz 2 39106 Magdeburg Germany
| | - Volker Lorenz
- Chemisches Institut der; Otto-von-Guericke-Universität; Universitätsplatz 2 39106 Magdeburg Germany
| | - Liane Hilfert
- Chemisches Institut der; Otto-von-Guericke-Universität; Universitätsplatz 2 39106 Magdeburg Germany
| | - Sabine Busse
- Chemisches Institut der; Otto-von-Guericke-Universität; Universitätsplatz 2 39106 Magdeburg Germany
| | - Caecilia Maichle-Mössmer
- Institut für Anorganische Chemie; Eberhard-Karls-Universität Tübingen; Auf der Morgenstelle 18, 7 2076 Tübingen Germany
| | - Frank T. Edelmann
- Chemisches Institut der; Otto-von-Guericke-Universität; Universitätsplatz 2 39106 Magdeburg Germany
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Apostolidis C, Walter O, Vogt J, Liebing P, Maron L, Edelmann FT. A Structurally Characterized Organometallic Plutonium(IV) Complex. Angew Chem Int Ed Engl 2017; 56:5066-5070. [PMID: 28371148 PMCID: PMC5485009 DOI: 10.1002/anie.201701858] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Indexed: 11/06/2022]
Abstract
The blood-red plutonocene complex Pu(1,3-COT'')(1,4-COT'') (4; COT''=η8 -bis(trimethylsilyl)cyclooctatetraenyl) has been synthesized by oxidation of the anionic sandwich complex Li[Pu(1,4-COT'')2 ] (3) with anhydrous cobalt(II) chloride. The first crystal structure determination of an organoplutonium(IV) complex revealed an asymmetric sandwich structure for 4 where one COT'' ring is 1,3-substituted while the other retains the original 1,4-substitution pattern. The electronic structure of 4 has been elucidated by a computational study, revealing a probable cause for the unexpected silyl group migration.
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Affiliation(s)
- Christos Apostolidis
- European Commission, Joint Research Centre, Directorate G-Nuclear Safety and Security, P.O. Box 2340, 76125, Karlsruhe, Germany
| | - Olaf Walter
- European Commission, Joint Research Centre, Directorate G-Nuclear Safety and Security, P.O. Box 2340, 76125, Karlsruhe, Germany
| | - Jochen Vogt
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Phil Liebing
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Laurent Maron
- Laboratoire de Physique et Chimie des Nanoobjets (LPCNO), Université de Toulouse/INSA/CNRS (UMR5215), 135 avenue de Rangueil, 31077, Toulouse cedex 4, France
| | - Frank T Edelmann
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
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Apostolidis C, Walter O, Vogt J, Liebing P, Maron L, Edelmann FT. A Structurally Characterized Organometallic Plutonium(IV) Complex. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701858] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Christos Apostolidis
- European Commission, Joint Research Centre, Directorate G-Nuclear Safety and Security; P.O. Box 2340 76125 Karlsruhe Germany
| | - Olaf Walter
- European Commission, Joint Research Centre, Directorate G-Nuclear Safety and Security; P.O. Box 2340 76125 Karlsruhe Germany
| | - Jochen Vogt
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg; Universitätsplatz 2 39106 Magdeburg Germany
| | - Phil Liebing
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg; Universitätsplatz 2 39106 Magdeburg Germany
| | - Laurent Maron
- Laboratoire de Physique et Chimie des Nanoobjets (LPCNO); Université de Toulouse/INSA/CNRS (UMR5215); 135 avenue de Rangueil 31077 Toulouse cedex 4 France
| | - Frank T. Edelmann
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg; Universitätsplatz 2 39106 Magdeburg Germany
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Bartolomé E, Arauzo A, Luzón J, Bartolomé J, Bartolomé F. Magnetic Relaxation of Lanthanide-Based Molecular Magnets. HANDBOOK OF MAGNETIC MATERIALS 2017. [DOI: 10.1016/bs.hmm.2017.09.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Wada H, Ooka S, Yamamura T, Kajiwara T. Light Lanthanide Complexes with Crown Ether and Its Aza Derivative Which Show Slow Magnetic Relaxation Behaviors. Inorg Chem 2016; 56:147-155. [DOI: 10.1021/acs.inorgchem.6b01764] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hisami Wada
- Department of Chemistry,
Faculty of Science, Nara Women’s University, Nara 630-8506, Japan
| | - Sayaka Ooka
- Department of Chemistry,
Faculty of Science, Nara Women’s University, Nara 630-8506, Japan
| | - Tomoo Yamamura
- Institute for Materials
Research, Tohoku University, Aoba-ku, Sendai 980-8577, Japan
| | - Takashi Kajiwara
- Department of Chemistry,
Faculty of Science, Nara Women’s University, Nara 630-8506, Japan
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