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Kobayashi K, Suzuki M, Sato T, Horii Y, Yoshida T, Breedlove BK, Yamashita M, Katoh K. Spin dynamics phenomena of a cerium(III) double-decker complex induced by intramolecular electron transfer. Dalton Trans 2024; 53:11664-11677. [PMID: 38651377 DOI: 10.1039/d4dt00436a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
Switchable spin dynamic properties in single-molecule magnets (SMMs) via an applied stimulus have applications in single-molecule devices. Many SMMs containing heavy lanthanoid ions with strong uniaxial magnetic anisotropy have been reported to exhibit SMM characteristics in the absence of an external magnetic field. On the other hand, SMMs containing light lanthanoid cerium(III) (Ce3+) ions exhibit field-induced slow magnetic relaxation. We investigated the chemical conversion of a diamagnetic Ce4+ ion (4f0) to a paramagnetic Ce3+ ion (4f1) in Ce-phthalocyaninato double-decker complexes (TBA+[Ce(obPc)2]- (1) and TBA+[Ce(Pc)2]- (2)) which exhibit field-induced SMM behaviour due to a 4f1 system. The phthalocyaninato ligands with electron-donating substituents (obPc2- = 2,3,9,10,16,17,23,24-octabutoxyphthalocyaninato) in 1 have a significant effect on the valence state of the Ce ion, which is reflected in its magnetic properties due to the mixed valence state of the Ce ion. Given that Ce double-decker complexes with π-conjugated ligands undergo intramolecular electron transfer (IET) to the Ce ion mixed valence state, characterised by a mixture of 4f0 and 4f1 configurations, we examined the dynamic disorder inherent in IET influencing magnetic relaxation.
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Affiliation(s)
- Kana Kobayashi
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3, Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Michiyuki Suzuki
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3, Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Tetsu Sato
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3, Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Yoji Horii
- Department of Chemistry, Faculty of Science, Nara Women's University, Kitauoya Higashimachi, Nara 630-8506, Japan
| | - Takefumi Yoshida
- Cluster of Nanomaterials, Graduate School of Systems Engineering, Wakayama University, 930 Sakae-Dani, Wakayama, 640-8510, Japan
| | - Brian K Breedlove
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3, Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Masahiro Yamashita
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3, Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan
- School of Chemical Science and Engineering, Tongji University, Siping Road 1239, Shanghai 200092, P. R. China
| | - Keiichi Katoh
- Department of Chemistry, Graduate School of Science, Josai University, 1-1, Keyakidai, Sakaddo, Saitama 350-0295, Japan.
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2
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Tubau À, Gómez-Coca S, Speed S, Font-Bardía M, Vicente R. New series of mononuclear β-diketonate cerium(III) field induced single-molecule magnets. Dalton Trans 2024; 53:9387-9405. [PMID: 38757803 DOI: 10.1039/d4dt00848k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
Five new β-diketonate Ce3+ mononuclear complexes, [Ce(Btfa)3(H2O)2] (1), [Ce(Btfa)3(phen)] (2), [Ce(Btfa)3(bipy)] (3), [Ce(Btfa)3(terpy)] (4) and [Ce(Btfa)3(bathophen)(DMF)] (5), where Btfa- = 4,4,4-trifluoro-1-phenyl-1,3-butanedionate, phen = 1,10-phenanthroline, bipy = 2,2'-bipyridyl, terpy = 2,2':6',2''-terpyridine and bathophen = 4,7-diphenyl-1,10-phenanthroline, have been synthesized and structurally characterized through X-ray diffraction of single crystals. The central Ce3+ atom displays a coordination number of 8 for 1, 2 and 3 and of 9 for 4 and 5. Under a 0 T external magnetic field, none of the given compounds exhibits single molecule magnet (SMM) behaviour. However, a small magnetic field, between 0.02 and 0.1 T, is enough for all the compounds to exhibit slow relaxation of the magnetization. A comprehensive magnetic analysis, with experimental magnetic data and ab initio calculations, was undertaken for all the complexes, and the study highlights the significance of the different spin relaxation mechanisms that must be considered for a Ce3+ lanthanide ion.
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Affiliation(s)
- Ànnia Tubau
- Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.
| | - Silvia Gómez-Coca
- Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.
- Institut de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Saskia Speed
- Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.
| | - Mercè Font-Bardía
- Departament de Mineralogia, Cristal lografia i Dipòsits Minerals and 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
| | - Ramon Vicente
- Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.
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3
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Mautner FA, Bierbaumer F, Fischer RC, Tubau À, Speed S, Ruiz E, Massoud SS, Vicente R, Gómez-Coca S. Insights into the Spin Dynamics of Mononuclear Cerium(III) Single-Molecule Magnets. Inorg Chem 2022; 61:11124-11136. [PMID: 35815859 PMCID: PMC9490812 DOI: 10.1021/acs.inorgchem.2c00958] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Four novel CeIII mononuclear complexes of formulas [Ce(ntfa)3(MeOH)2] (1), [Ce(ntfa)3(5,5'-Me2bipy)] (2), [Ce(ntfa)3(terpy)] (3), and [Ce(ntfa)3(bipy)2] (4), where ntfa = 4,4,4-trifluoro-1-(naphthalen-2-yl)butane-1,3-dionato, 5,5'-Me2bipy = 5,5'-dimethyl-2,2'-dipyridyl, terpy = 2,2':6',2″-terpyridine, and bipy = 2,2'-bipyridine, have been synthesized and structurally characterized with CeIII displaying coordination numbers of 8, 8, 9, and 10, respectively. Magnetic measurements indicate that all the complexes show a field-induced single-ion magnet behavior under a small applied dc field. The magnetic analysis shows the relevance of the different spin relaxation mechanisms in the magnetic relaxation of the CeIII compounds, with special emphasis on the local-mode process. Multiconfigurational calculations were also performed to get more information on the axiality of the compounds.
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Affiliation(s)
- Franz A Mautner
- Institut für Physikalische und Theoretische Chemie, Technische Universität Graz, Stremayrgasse 9, A-8010 Graz, Austria
| | - Florian Bierbaumer
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, A-8010 Graz, Austria
| | - Roland C Fischer
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, A-8010 Graz, Austria
| | - Ànnia Tubau
- Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Spain
| | - Saskia Speed
- Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Spain.,Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Spain
| | - Salah S Massoud
- Department of Chemistry, University of Louisiana at Lafayette, P.O. Box 43700, Lafayette, Louisiana 70504, United States
| | - Ramon Vicente
- Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Spain
| | - Silvia Gómez-Coca
- Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Spain.,Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Spain
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4
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Ahmed N, Uddin Ansari K. Experimental and theoretical insights into Co-Ln magnetic exchange and the rare slow-magnetic relaxation behavior of [CoII2Pr] 2+ in a series of linear [CoII2Ln] 2+ complexes. Dalton Trans 2022; 51:4122-4134. [PMID: 35188157 DOI: 10.1039/d1dt03573h] [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
We herein report a series of near-linear trinuclear complexes [Co2Ln(HL)4(NO3)](NO3)2 (where HL = (2-methoxy-6-[(E)-2'-hydroxymethyl-phenyliminomethyl]-phenolate) with Ln(III) = La (1), Ce (2), Pr (3)). For the comparative study, we have also included the recently reported analogous complexes of Gd(III), Tb(III), and Dy(III) (complexes 4-6) with the same H2L ligand. The experimental nature of the dc magnetic susceptibilities profile and an empirical approach revealed that the magnetic exchange interaction between Co(II) and Ln(III) having <4f7 (complexes 2 and 3) is antiferromagnetic while the dominant interaction between Co(II) and Ln(III) having ≥4f7 (complexes 4-6) is ferromagnetic. Dynamic magnetic relaxation studies on complexes 1-3 revealed the field induced single-molecule magnetic (SMM) behavior of 1 and 3 with effective energy barriers of 10.65 K and 15.03 K respectively, for magnetic relaxation. To the best of our knowledge, 3d-Pr(III) based zero or field induced SMMs have not been reported to date. CASSCF/SO-RASSI/SINGLE_ANISO based ab initio calculations on the X-ray structures of complexes 1-6, followed by POLY_ANISO simulations, estimated the magnetic exchange coupling constants JCo-Ln and JCo-Co and also rationalized our experimental findings for the dynamic magnetic properties.
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Affiliation(s)
- Naushad Ahmed
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, Maharashtra, India.
| | - Kamal Uddin Ansari
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, Maharashtra, India.
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5
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Korchagin DV, Ivakhnenko EP, Demidov OP, Akimov AV, Morgunov RB, Starikov AG, Palii AV, Minkin VI, Aldoshin SM. Field supported slow magnetic relaxation in a quasi-one-dimensional copper( ii) complex with a pentaheterocyclic triphenodioxazine. NEW J CHEM 2021. [DOI: 10.1039/d1nj03217h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A new copper(ii) complex (I) was obtained by the reaction of a sterically crowded 2,4-di-(tert-butyl)-9-chloro-benzo[5,6][1,4]oxazine[2,3-b]phenoxazine bridging ligand with Cu(ii) hexafluoroacetylacetonate.
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Affiliation(s)
- D. V. Korchagin
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 Acad. Semenov Av., 142432 Chernogolovka, Russia
| | - E. P. Ivakhnenko
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachki St., 344090 Rostov on Don, Russia
| | - O. P. Demidov
- North Caucasus Federal University, 1 Pushkin st., Stavropol, 355017, Russian Federation
| | - A. V. Akimov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 Acad. Semenov Av., 142432 Chernogolovka, Russia
| | - R. B. Morgunov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 Acad. Semenov Av., 142432 Chernogolovka, Russia
| | - A. G. Starikov
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachki St., 344090 Rostov on Don, Russia
| | - A. V. Palii
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 Acad. Semenov Av., 142432 Chernogolovka, Russia
| | - V. I. Minkin
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachki St., 344090 Rostov on Don, Russia
| | - S. M. Aldoshin
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 Acad. Semenov Av., 142432 Chernogolovka, Russia
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6
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Shi T, Xu Y, Li MX, Liu CM, Nfor EN, Wang ZX. A 10-coordinate cerium(III) complex with a ferrocene-based terpyridine ligand exhibiting field-induced slow magnetic relaxation. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114695] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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7
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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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8
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Mayans J, Saez Q, Font-Bardia M, Escuer A. Enhancement of magnetic relaxation properties with 3d diamagnetic cations in [ZnIILnIII] and [NiIILnIII], LnIII= Kramers lanthanides. Dalton Trans 2019; 48:641-652. [DOI: 10.1039/c8dt03679a] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Comparison between two series of [NiIILnIII] and [ZnIILnIII] dimers reveals lower intermolecular interactions for the square-planar NiIIderivatives that favour an induced SIM response. Some unusual CeIII, NdIIIand YbIIISIMs are reported.
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Affiliation(s)
- Júlia Mayans
- Departament de Química Inorgànica i Orgànica
- Secció Inorgànica and Institute of Nanoscience (IN2UB) and Nanotechnology
- Universitat de Barcelona
- Barcelona-08028
- Spain
| | - Queralt Saez
- Departament de Química Inorgànica i Orgànica
- Secció Inorgànica and Institute of Nanoscience (IN2UB) and Nanotechnology
- Universitat de Barcelona
- Barcelona-08028
- Spain
| | - Mercè Font-Bardia
- Departament de Mineralogia
- Cristal·lografia i Dipòsits Minerals
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Albert Escuer
- Departament de Química Inorgànica i Orgànica
- Secció Inorgànica and Institute of Nanoscience (IN2UB) and Nanotechnology
- Universitat de Barcelona
- Barcelona-08028
- Spain
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9
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Vráblová A, Tomás M, Falvello LR, Dlháň Ľ, Titiš J, Černák J, Boča R. Slow magnetic relaxation in Ni–Ln (Ln = Ce, Gd, Dy) dinuclear complexes. Dalton Trans 2019; 48:13943-13952. [DOI: 10.1039/c9dt02122a] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Unusual magnetic behaviour is observed in compounds with three Cl ligands in fac-mode coordination to dysprosium, cerium and even gadolinium.
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Affiliation(s)
- Anna Vráblová
- Department of Inorganic Chemistry
- Institute of Chemistry
- P. J. Šafárik University in Košice
- Košice
- Slovakia
| | - Milagros Tomás
- Centro de Quimica y Materiales de Aragón (CEQMA-ISQCH)
- Departamento de Química Inorgánica
- Pedro Cerbuna 12
- University of Zaragoza–CSIC
- E-50009 Zaragoza
| | - Larry R. Falvello
- Instituto de Ciencia de Materiales de Aragón (ICMA)
- Departamento de Química Inorgánica
- University of Zaragoza–CSIC
- E-50009 Zaragoza
- Spain
| | - Ľubor Dlháň
- Institute of Inorganic Chemistry
- Slovak University of Technology
- 812 37 Bratislava
- Slovakia
| | - Ján Titiš
- Department of Chemistry
- FPV
- University of SS Cyril and Methodius
- 917 01 Trnava
- Slovakia
| | - Juraj Černák
- Department of Inorganic Chemistry
- Institute of Chemistry
- P. J. Šafárik University in Košice
- Košice
- Slovakia
| | - Roman Boča
- Department of Chemistry
- FPV
- University of SS Cyril and Methodius
- 917 01 Trnava
- Slovakia
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Rousset E, Piccardo M, Boulon M, Gable RW, Soncini A, Sorace L, Boskovic C. Slow Magnetic Relaxation in Lanthanoid Crown Ether Complexes: Interplay of Raman and Anomalous Phonon Bottleneck Processes. Chemistry 2018; 24:14768-14785. [DOI: 10.1002/chem.201802779] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Indexed: 11/12/2022]
Affiliation(s)
- Elodie Rousset
- School of Chemistry University of Melbourne Victoria 3010 Australia
| | - Matteo Piccardo
- School of Chemistry University of Melbourne Victoria 3010 Australia
| | - Marie‐Emmanuelle Boulon
- UdR INSTM and Department of Chemistry “U. Schiff” University of Florence 50019 Sesto Fiorentino (FI) Italy
| | - Robert W. Gable
- School of Chemistry University of Melbourne Victoria 3010 Australia
| | | | - Lorenzo Sorace
- UdR INSTM and Department of Chemistry “U. Schiff” University of Florence 50019 Sesto Fiorentino (FI) Italy
| | - Colette Boskovic
- School of Chemistry University of Melbourne Victoria 3010 Australia
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11
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Miroslaw B, Cristóvão B, Hnatejko Z. Heterometallic Zn II⁻Ln III⁻Zn II Schiff Base Complexes with Linear or Bent Conformation-Synthesis, Crystal Structures, Luminescent and Magnetic Characterization. Molecules 2018; 23:molecules23071761. [PMID: 30021976 PMCID: PMC6099393 DOI: 10.3390/molecules23071761] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 07/14/2018] [Accepted: 07/15/2018] [Indexed: 02/04/2023] Open
Abstract
A series of racemic, heteronuclear complexes [Zn2Nd(ac)2(HL)2]NO3·3H2O (1), [Zn2Sm(ac)2(HL)2]NO3·3CH3OH·0.3H2O (2), [Zn2Ln(ac)2(HL)2]NO3·5.33H2O (3–5) (where HL is the dideprotonated form of N,N′-bis(5-bromo-3-methoxysalicylidene)-1,3-diamino-2-propanol, ac = acetate ion, and Ln = Eu (3), Tb (4), Dy (5), respectively) with an achiral multisite coordination Schiff base ligand (H3L) were synthesized and characterized. The X-ray crystallography revealed that the chirality in complexes is centered at lanthanide(III) ions due to two vicinally located μ-acetato-bridging ligands. The presented crystals have isoskeletal coordination units but they crystallize in monoclinic (1, 2) or trigonal crystal systems (3–5) with slightly different conformation. In 1 and 2 the ZnII–LnIII–ZnII coordination core is linear, whereas in isostructural crystals 3–5 the chiral coordination cores are bent and lie on a two-fold axis. The complexes 1, 3–5 show a blue emission attributed to the emission of the ligand. For ZnII2SmIII complex (2) the characteristic emission bands of f-f* transitions were observed. The magnetic properties for compounds 1, 4 and 5 are characteristic for the paramagnetism of the corresponding lanthanide(III) ions.
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Affiliation(s)
- Barbara Miroslaw
- Department of Crystallography, Faculty of Chemistry, Maria Curie-Sklodowska University, 20-031 Lublin, Poland.
| | - Beata Cristóvão
- Department of General and Coordination Chemistry, Faculty of Chemistry, Maria Curie-Sklodowska University, 20-031 Lublin, Poland.
| | - Zbigniew Hnatejko
- Department of Rare Earths, Faculty of Chemistry, Adam Mickiewicz University, 61-614 Poznań, Poland.
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12
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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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13
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Upadhyay A, Vignesh KR, Das C, Singh SK, Rajaraman G, Shanmugam M. Influence of the Ligand Field on the Slow Relaxation of Magnetization of Unsymmetrical Monomeric Lanthanide Complexes: Synthesis and Theoretical Studies. Inorg Chem 2017; 56:14260-14276. [DOI: 10.1021/acs.inorgchem.7b02357] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Apoorva Upadhyay
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India
| | - Kuduva R. Vignesh
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India
| | - Chinmoy Das
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India
| | - Saurabh Kumar Singh
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India
| | - Maheswaran Shanmugam
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India
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14
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Canaj AB, Siczek M, Lis T, Murrie M, Brechin EK, Milios CJ. A [Ce 21] keplerate. Dalton Trans 2017; 46:7677-7680. [PMID: 28590003 DOI: 10.1039/c7dt01883e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The solvothermal reaction between Ce(NO3)3·6H2O, 2-amino-isobutyric acid, 2-hydroxy-1-naphthaldehyde and 2-amino-2-methyl-1,3-propanediol in MeOH, in the presence of base, leads to the formation of a unique [CeCe ] keplerate cage.
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Affiliation(s)
- Angelos B Canaj
- Department of Chemistry, The University of Crete, Voutes 71003, Herakleion, Greece.
| | - Milosz Siczek
- Faculty of Chemistry, University of Wroclaw, Joliot-Curie 14, Wroclaw 50-383, Poland
| | - Tadeusz Lis
- Faculty of Chemistry, University of Wroclaw, Joliot-Curie 14, Wroclaw 50-383, Poland
| | - Mark Murrie
- WestCHEM, School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK.
| | - Euan K Brechin
- EaStCHEM, School of Chemistry, University of Edinburgh, David Brewster Road, Edinburgh, UK EH9 3FJ, UK.
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15
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Das SK, Chatterjee S, Bhunia S, Mondal A, Mitra P, Kumari V, Pradhan A, Bhaumik A. A new strongly paramagnetic cerium-containing microporous MOF for CO2 fixation under ambient conditions. Dalton Trans 2017; 46:13783-13792. [DOI: 10.1039/c7dt02040f] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new microporous Ce2NDC3 MOF has been synthesized solvothermally and it displayed strong paramagnetism and high catalytic efficiency in CO2 fixation under ambient conditions for the synthesis of cyclic carbonates.
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Affiliation(s)
- Sabuj Kanti Das
- Department of Materials Science
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
| | - Sauvik Chatterjee
- Department of Materials Science
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
| | - Subhajit Bhunia
- Director Research Unit
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
| | - Abhishake Mondal
- Centre de Recherche Paul Pascal CRPP-CNRS UPR 8641 Research team for “Molecular Materials & Magnetism” 115
- 33600 Pessac
- France
| | - Partha Mitra
- Department of Inorganic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
| | - Vandana Kumari
- Department of Materials Science
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
| | - Anirban Pradhan
- Director Research Unit
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
| | - Asim Bhaumik
- Department of Materials Science
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
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16
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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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17
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18
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Ding M, Cutsail III GE, Aravena D, Amoza M, Rouzières M, Dechambenoit P, Losovyj Y, Pink M, Ruiz E, Clérac R, Smith JM. A Low Spin Manganese(IV) Nitride Single Molecule Magnet. Chem Sci 2016; 7:6132-6140. [PMID: 27746891 PMCID: PMC5058364 DOI: 10.1039/c6sc01469k] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Accepted: 06/09/2016] [Indexed: 01/26/2023] Open
Abstract
Structural, spectroscopic and magnetic methods have been used to characterize the tris(carbene)borate compound PhB(MesIm)3Mn≡N as a four-coordinate manganese(IV) complex with a low spin (S = 1/2) configuration. The slow relaxation of the magnetization in this complex, i.e. its single-molecule magnet (SMM) properties, is revealed under an applied dc field. Multireference quantum mechanical calculations indicate that this SMM behavior originates from an anisotropic ground doublet stabilized by spin-orbit coupling. Consistent theoretical and experiment data show that the resulting magnetization dynamics in this system is dominated by ground state quantum tunneling, while its temperature dependence is influenced by Raman relaxation.
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Affiliation(s)
- Mei Ding
- Department of Chemistry
, Indiana University
,
800 E. Kirkwood Ave.
, Bloomington
, IN 47405
, USA
.
| | - George E. Cutsail III
- Department of Chemistry
, Northwestern University
,
2145 Sheridan Road
, Evanston
, IL 60208
, USA
| | - Daniel Aravena
- Departamento de Química de los Materiales
, Facultad de Química y Biología
, Universidad de Santiago de Chile (USACH)
,
Casilla 40, Correo 33
, Santiago
, Chile
| | - Martín Amoza
- Departament de Química Inorgànica
, Institut de Recerca de Química Teòrica i Computacional
, Universitat de Barcelona
,
Diagonal 645
, Barcelona
, 08028 Spain
.
| | - Mathieu Rouzières
- CNRS
, CRPP
, UPR 8641
,
F-33600 Pessac
, France
.
- Univ. Bordeaux
, CRPP
, UPR 8641
,
F-33600 Pessac
, France
| | - Pierre Dechambenoit
- CNRS
, CRPP
, UPR 8641
,
F-33600 Pessac
, France
.
- Univ. Bordeaux
, CRPP
, UPR 8641
,
F-33600 Pessac
, France
| | - Yaroslav Losovyj
- Department of Chemistry
, Indiana University
,
800 E. Kirkwood Ave.
, Bloomington
, IN 47405
, USA
.
| | - Maren Pink
- Department of Chemistry
, Indiana University
,
800 E. Kirkwood Ave.
, Bloomington
, IN 47405
, USA
.
| | - Eliseo Ruiz
- Departament de Química Inorgànica
, Institut de Recerca de Química Teòrica i Computacional
, Universitat de Barcelona
,
Diagonal 645
, Barcelona
, 08028 Spain
.
| | - Rodolphe Clérac
- CNRS
, CRPP
, UPR 8641
,
F-33600 Pessac
, France
.
- Univ. Bordeaux
, CRPP
, UPR 8641
,
F-33600 Pessac
, France
| | - Jeremy M. Smith
- Department of Chemistry
, Indiana University
,
800 E. Kirkwood Ave.
, Bloomington
, IN 47405
, USA
.
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19
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Gupta SK, Rajeshkumar T, Rajaraman G, Murugavel R. An unprecedented zero field neodymium(iii) single-ion magnet based on a phosphonic diamide. Chem Commun (Camb) 2016; 52:7168-71. [DOI: 10.1039/c6cc03066a] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A pseudo-D5h symmetric Nd(iii)-complex exhibits zero-field SIM behavior as a result of a strong axial crystal field, stabilization of the rare mJ = |±9/2〉 ground state, and small transverse anisotropy.
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Affiliation(s)
- Sandeep K. Gupta
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai-400076
- India
| | | | - 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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20
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Singh SK, Gupta T, Ungur L, Rajaraman G. Magnetic Relaxation in Single-Electron Single-Ion Cerium(III) Magnets: Insights from Ab Initio Calculations. Chemistry 2015; 21:13812-9. [DOI: 10.1002/chem.201501330] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2015] [Indexed: 11/06/2022]
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21
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Takehara C, Then PL, Kataoka Y, Nakano M, Yamamura T, Kajiwara T. Slow magnetic relaxation of light lanthanide-based linear LnZn2 trinuclear complexes. Dalton Trans 2015; 44:18276-83. [DOI: 10.1039/c5dt03148f] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Four isostructural Zn(ii)–Ln(iii)–Zn(ii) trinuclear complexes were synthesized using light lanthanide ions as magnetic centers, of which Ce(iii) and Nd(iii) complexes behaved as single-molecule magnets.
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Affiliation(s)
- Chika Takehara
- Faculty of Science
- Nara Women's University
- Nara
- Nara 630-8506
- Japan
| | - Poh Ling Then
- Faculty of Science
- Nara Women's University
- Nara
- Nara 630-8506
- Japan
| | - Yumiko Kataoka
- Faculty of Science
- Nara Women's University
- Nara
- Nara 630-8506
- Japan
| | | | - Tomoo Yamamura
- Institute for Materials Research
- Tohoku University
- Sendai
- Japan
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22
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Then PL, Takehara C, Kataoka Y, Nakano M, Yamamura T, Kajiwara T. Structural switching from paramagnetic to single-molecule magnet behaviour of LnZn2 trinuclear complexes. Dalton Trans 2015; 44:18038-48. [DOI: 10.1039/c5dt02965a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Single molecule magnet (SMM) behaviors of Zn–Ln–Zn complexes were switched by slight changing of the molecular structures.
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Affiliation(s)
- Poh Ling Then
- Faculty of Science
- Nara Women's University
- Nara 630-8506
- Japan
| | - Chika Takehara
- Faculty of Science
- Nara Women's University
- Nara 630-8506
- Japan
| | - Yumiko Kataoka
- Faculty of Science
- Nara Women's University
- Nara 630-8506
- Japan
| | - Motohiro Nakano
- Graduate School of Science
- Osaka University
- Osaka 560-0043
- Japan
| | - Tomoo Yamamura
- Institute for Materials Research
- Tohoku University
- Sendai
- Japan
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