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Rogacz K, Brzozowska M, Baś S, Kurpiewska K, Pinkowicz D. Low-Coordinate Erbium(III) Single-Molecule Magnets with Photochromic Behavior. Inorg Chem 2022; 61:16295-16306. [PMID: 36197744 PMCID: PMC9580000 DOI: 10.1021/acs.inorgchem.2c01999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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The structures and magnetic properties of photoresponsive
magnets
can be controlled or fine-tuned by visible light irradiation, which
makes them appealing as candidates for ternary memory devices: photochromic
and photomagnetic at the same time. One of the strategies for photoresponsive
magnetic systems is the use of photochromic/photoswitchable molecules
coordinated to paramagnetic metal centers to indirectly influence
their magnetic properties. Herein, we present two erbium(III)-based
coordination systems: a trinuclear molecule {[ErIII(BHT)3]3(dtepy)2}.4C5H12 (1) and a 1D coordination chain {[ErIII(BHT)3(azopy)}n·2C5H12 (2), where the bridging photochromic
ligands belong to the class of diarylethenes: 1,2-bis((2-methyl-5-pyridyl)thie-3-yl)perfluorocyclopentene
(dtepy) and 4,4′-azopyridine (azopy), respectively (BHT = 2,6-di-tert-butyl-4-methylphenolate). Both compounds show slow
dynamics of magnetization, typical for single-molecule magnets (SMMs)
as revealed by alternating current (AC) magnetic susceptibility measurements.
The trinuclear compound 1 also shows an immediate color
change from yellow to dark blue in response to near-UV irradiation.
Such behavior is typical for the photoisomerization of the open form
of the ligand into its closed form. The color change can be reversed
by exposing the closed form to visible light. The chain-like compound 2, on the other hand, does not show significant signs of the
expected trans–cis photoisomerization
of the azopyridine in response to UV irradiation and does not appear
to show photoswitching behavior. Three-coordinate
[ErIII(BHT)3] single
ion magnets undergo ligand addition reaction in pentane to form linear
trinuclear photochromic nanomagnets where both functionalities persist.
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Affiliation(s)
- Katarzyna Rogacz
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387Kraków, Poland
| | - Maria Brzozowska
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387Kraków, Poland
| | - Sebastian Baś
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387Kraków, Poland
| | - Katarzyna Kurpiewska
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387Kraków, Poland
| | - Dawid Pinkowicz
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387Kraków, Poland
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2
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Üngör Ö, Choi ES, Shatruk M. Solvent‐Dependent Spin‐Crossover Behavior in Semiconducting Co–Crystals of [Fe(1‐bpp)
2
]
2+
Cations and TCNQ
δ−
Anions (0<δ<1). Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ökten Üngör
- Department of Chemistry and Biochemistry Florida State University 95 Chieftan Way Tallahassee FL 32306 USA
- Department of Chemistry Colorado State University 301 W. Pitkin St Fort Collins CO 80523 USA
| | - Eun Sang Choi
- National High Magnetic Field Laboratory 1800 E Paul Dirac Dr Tallahassee FL 32310 USA
| | - Michael Shatruk
- Department of Chemistry and Biochemistry Florida State University 95 Chieftan Way Tallahassee FL 32306 USA
- National High Magnetic Field Laboratory 1800 E Paul Dirac Dr Tallahassee FL 32310 USA
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Magnetic Switching in Vapochromic Oxalato-Bridged 2D Copper(II)-Pyrazole Compounds for Biogenic Amine Sensing. MAGNETOCHEMISTRY 2021. [DOI: 10.3390/magnetochemistry7050065] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A new two-dimensional (2D) coordination polymer of the formula {Cu(ox)(4-Hmpz)·1/3H2O}n (1) (ox = oxalate and 4-Hmpz = 4-methyl-1H-pyrazole) has been prepared, and its structure has been determined by single-crystal X-ray diffraction. It consists of corrugated oxalato-bridged copper(II) neutral layers featuring two alternating bridging modes of the oxalate group within each layer, the symmetric bis-bidentate (μ-κ2O1,O2:κ2O2′,O1′) and the asymmetric bis(bidentate/monodentate) (μ4-κO1:κ2O1,O2:κO2′:κ2O2′,O1′) coordination modes. The three crystallographically independent six-coordinate copper(II) ions that occur in 1 have tetragonally elongated surroundings with three oxygen atoms from two oxalate ligands, a methylpyrazole-nitrogen defining the equatorial plane, and two other oxalate-oxygen atoms occupying the axial positions. The monodentate 4-Hmpz ligands alternatively extrude above and below each oxalate-bridged copper(II) layer, and the water molecules of crystallization are located between the layers. Compound 1 exhibits a fast and selective adsorption of methylamine vapors to afford the adsorbate of formula {Cu(ox)(4-Hmpz)·3MeNH2·1/3H2O}n (2), which is accompanied by a concomitant color change from cyan to deep blue. Compound 2 transforms into {Cu(ox)(4-Hmpz)·MeNH2·1/3H2O}n (3) under vacuum for three hours. The cryomagnetic study of 1–3 revealed a unique switching from strong (1) to weak (2 and 3) antiferromagnetic interactions. The external control of the optical and magnetic properties along this series of compounds might make them suitable candidates for switching optical and magnetic devices for chemical sensing.
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Spontaneous Magnetization and Optical Activity in the Chiral Series {(L-proline)nV[Cr(CN)6]x} (0 < n < 3). MAGNETOCHEMISTRY 2020. [DOI: 10.3390/magnetochemistry6010012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The incorporation of the natural amino acid L-proline in the synthesis to vanadium-chromium Prussian blue derivatives results in materials exhibiting magnetic ordering including chiral magnetic centers. Although the amorphous nature of these materials makes difficult to assess the structural features of these proline-containing compounds, magnetic and spectroscopic data confirms their multifunctionality. They exhibit high-temperature magnetic ordering (Tc < 255 K) and a circular dichroic signal, representing the molecule-based chiral magnets with the highest ordering temperatures reported to date. In addition, the presence of chiral L-proline (or D-proline) has additional benefits, including higher redox stability and the appearance of magnetic hysteresis. The latter was not observed in the parent compounds, the series of room temperature molecule-based magnets V[Cr(CN)6]x.
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5
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Martínez-Hernández C, Gómez-Claramunt P, Benmansour S, Gómez-García CJ. Pre- and post-synthetic modulation of the ordering temperatures in a family of anilato-based magnets. Dalton Trans 2019; 48:13212-13223. [PMID: 31342995 DOI: 10.1039/c9dt02275a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We report the synthesis and characterization of six novel heterometallic molecule-based 2D magnets with the bromanilato ligand (C6O4Br22- = 1,3-dibromo-2,5-dihydroxy-1,4-benzoquinone dianion) and six different benzene derivative molecules. The compounds, formulated as (NBu4)[MnCr(C6O4Br2)3]·1.75C6H5Br (1), (NBu4)[MnCr(C6O4Br2)3]·C6H5X with X = Cl (2), I (3) and CH3 (4) and (NBu4)[MnCr(C6O4Br2)3]·2C6H5X with X = CN (5) and NO2 (6), present the classical hexagonal honeycomb-(6,3) lattice with alternating Mn(ii) and Cr(iii) ions. The layers are packed in an eclipsed way along the a direction giving rise to hexagonal channels where the benzene derivative molecules are located with π-π interactions between the benzene and anilato rings. The interlayer space contains the NBu4+ cations needed to compensate the anionic charge of the [MnIICrIII(C6O4Br2)3]- layers. The Mn-Cr exchange coupling through the bromanilato ligands is antiferromagnetic, leading to a long range ferrimagnetic order in the six compounds with ordering temperatures around 10 K. These ordering temperatures can be slightly modified in the range 9.5-11.4 K by simply changing the benzene-derivative solvent molecule. Here we discuss the possible structural and electronic reasons for this tuning effect of the solvent molecule and the important structural role played by the solvent molecules. We also show that it is possible to exchange the solvent molecules inside the hexagonal channels post-synthetically causing a tiny change in the ordering temperature and coercive field. Furthermore, we also show that it is possible to further change the ordering temperatures by simply removing the solvent molecules by heating the sample at low pressures to obtain a de-solvated phase.
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Affiliation(s)
- Cristian Martínez-Hernández
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán, 2, 46980 Paterna, Valencia, Spain.
| | - Patricia Gómez-Claramunt
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán, 2, 46980 Paterna, Valencia, Spain.
| | - Samia Benmansour
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán, 2, 46980 Paterna, Valencia, Spain.
| | - Carlos J Gómez-García
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán, 2, 46980 Paterna, Valencia, Spain.
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Díaz-Ortega IF, Herrera JM, Reyes Carmona Á, Galán-Mascarós JR, Dey S, Nojiri H, Rajaraman G, Colacio E. A Chiral Bipyrimidine-Bridged Dy 2 SMM: A Comparative Experimental and Theoretical Study of the Correlation Between the Distortion of the DyO6N2 Coordination Sphere and the Anisotropy Barrier. Front Chem 2018; 6:537. [PMID: 30467538 PMCID: PMC6236069 DOI: 10.3389/fchem.2018.00537] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 10/16/2018] [Indexed: 11/18/2022] Open
Abstract
Chiral bipyrimidine-bridged dinuclear LnIII complexes of general formula [(μ-bipym){((+)-tfacam)3Ln}2] and [(μ-bipym){((-)-tfacam)3Ln}2], have been prepared from the assembly of Ln(AcO)3·nH2O (LnIII = Dy, Gd), (+)/(−)-3-(trifluoroacetyl)camphor enantiopure ligands ((+)/(-)-Htfacam) and bipyrimidine (bipym). The structure and chirality of these complexes have been supported by single-crystal X-Ray diffraction and circular dichroism. The study of the magnetic properties of the GdIII complexes revealed a very weak antiferromagnetic interaction between the GdIII ions through the bipyrimidine bridging ligand. Ab initio CASSCF calculations indicated that the ground Kramers doublet (KD) of both DyIII centers is almost purely axial with the anisotropy axis located close to the two tfacam−ligands at opposite sides of each DyIIIatom, which create an axial crystal field. In keeping with this, ac dynamic measurements indicated slow relaxation of the magnetization at zero field with Ueff = 55.1 K, a pre-exponential factor of τo = 2.17·10−6 s and τQTM = 8 μs. When an optimal dc field of 0.1 T is applied, QTM is quenched and Ueff increases to 75.9 K with τo = 6.16 × 10−7 s. The DyN2O8 coordination spheres and SMM properties of [(μ-bipym){((+)-tfacam)3Ln}2] and their achiral [(Dy(β-diketonate)3)2(μ-bpym)]analogous have been compared and a magneto-structural correlation has been established, which has been supported by theoretical calculations. In contrast to the GdIII compounds, the magnetic exchange interaction between the DyIII ions has been calculated to be very weak and, generally, ferromagnetic in nature. Relaxation mechanisms for [(μ-bipym){((+)-tfacam)3Ln}2] and previously reported analogous have been proposed from ab initio calculations. As the magnetic exchange interaction found to be very weak, the observed magnetization blockade in these systems are primarily dictated by the single ion anisotropy of DyIII ions.
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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
| | - Álvaro Reyes Carmona
- Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology, Tarragona, Spain
| | - José Ramón Galán-Mascarós
- Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology, Tarragona, Spain.,Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - Sourav Dey
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, India
| | - Hiroyuki Nojiri
- Institute for Materials Research, Tohoku University, Sendai, Japan
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, India
| | - Enrique Colacio
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Granada, Spain
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7
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How to Make a Better Magnet? Insertion of Additional Bridging Ligands into a Magnetic Coordination Polymer. MAGNETOCHEMISTRY 2018. [DOI: 10.3390/magnetochemistry4030041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A three-dimensional cyanide-bridged coordination polymer based on FeII (S = 2) and NbIV (S = 1/2) {[FeII(H2O)2]2[NbIV(CN)8]·4H2O}n (Fe2Nb) was modified at the self-assembly stage by inserting an additional formate HCOO− bridge into its cyanide framework. The resulting mixed-bridged {(NH4)[(H2O)FeII-(μ-HCOO)-FeII(H2O)][NbIV(CN)8]·3H2O}n (Fe2NbHCOO) exhibited additional FeII-HCOO-FeII structural motifs connecting each of the two FeII centers. The insertion of HCOO− was possible due to the substitution of some of the aqua ligands and crystallization water molecules in the parent framework by formate anions and ammonium cations. The formate molecular bridge not only shortened the distance between FeII ions in Fe2NbHCOO from 6.609 Å to 6.141 Å, but also created additional magnetic interaction pathways between the magnetic centers, resulting in an increase in the long range magnetic ordering temperature from 43 K for Fe2Nb to 58 K. The mixed-bridged Fe2NbHCOO also showed a much broader magnetic hysteresis loop of 0.102 T, compared to 0.013 T for Fe2Nb.
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8
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Bridonneau N, Quatremare P, von Bardeleben HJ, Cantin J, Pillet S, Bendeif E, Marvaud V. Direct Evidence of a Photoinduced Electron Transfer in Diluted “Molybdenum‐Copper” Molecular Compounds. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700983] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Nathalie Bridonneau
- IPCM‐CNRS‐UMR‐8232 UPMC‐Univ. Paris 6, cc 229 4 place Jussieu 75252 Paris Cedex 05 France
| | - Pierre Quatremare
- IPCM‐CNRS‐UMR‐8232 UPMC‐Univ. Paris 6, cc 229 4 place Jussieu 75252 Paris Cedex 05 France
| | | | - Jean‐Louis Cantin
- INSP‐CNRS‐UMR‐7588 UPMC‐Univ. Paris 6 4 place Jussieu 75252 Paris Cedex 05 France
| | | | | | - Valérie Marvaud
- IPCM‐CNRS‐UMR‐8232 UPMC‐Univ. Paris 6, cc 229 4 place Jussieu 75252 Paris Cedex 05 France
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9
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Fitta M, Szuwarzyński M, Czaja P, Lewińska G, Bałanda M. The Magnetocaloric Effect in the Thin Film of a Prussian Blue Analogue. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Magdalena Fitta
- Department of Magnetic Materials and Nanostructures Institute of Nuclear Physics Polish Academy of Sciences 31‐342 Krakow Poland
| | - Michał Szuwarzyński
- Faculty of Chemistry Jagiellonian University 30‐060 Kraków Poland
- Academic Centre for Materials and Nanotechnology AGH University of Science and Technology 30‐059 Kraków Poland
| | - Paweł Czaja
- Institute of Metallurgy and Materials Science Polish Academy of Sciences 30‐059 Kraków Poland
| | - Gabriela Lewińska
- Institute of Physics Cracow University of Technology 30‐084 Kraków Poland
| | - Maria Bałanda
- Department of Magnetic Materials and Nanostructures Institute of Nuclear Physics Polish Academy of Sciences 31‐342 Krakow Poland
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Reczyński M, Chorazy S, Nowicka B, Sieklucka B, Ohkoshi SI. Dehydration of Octacyanido-Bridged Ni II-W IV Framework toward Negative Thermal Expansion and Magneto-Colorimetric Switching. Inorg Chem 2016; 56:179-185. [PMID: 27991781 DOI: 10.1021/acs.inorgchem.6b01883] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An inorganic three-dimensional [NiII(H2O)2]2[WIV(CN)8]·4H2O (1) framework undergoes a single-crystal-to-single-crystal transformation upon thermal dehydration, producing a fully anhydrous phase NiII2[WIV(CN)8] (1d). The dehydration process induces changes in optical, magnetic, and thermal expansion properties. While 1 reveals typical positive thermal expansion of the crystal lattice, greenish-yellow color, and paramagnetic behavior, 1d is the first ever reported octacyanido-based solid revealing negative thermal expansion, also exhibiting a deep red color and diamagnetism. Such drastic shift in the physical properties is explained by the removal of water molecules, leaving the exclusively cyanido-bridged bimetallic network, which is accompanied by the transformation of the octahedral paramagnetic [NiII(H2O)2(NC)4]2- to the square-planar diamagnetic [NiII(NC)4]2- moieties.
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Affiliation(s)
- Mateusz Reczyński
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Kraków, Poland.,Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Szymon Chorazy
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Kraków, Poland.,Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Beata Nowicka
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Kraków, Poland
| | - Barbara Sieklucka
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Kraków, Poland
| | - Shin-Ichi Ohkoshi
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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