1
|
Mondal S, Chauhan D, Guizouarn T, Pointillart F, Rajaraman G, Steiner A, Baskar V. Self-Assembled Lanthanide Phosphinate Square Grids (Ln = Er, Dy, and Tb): Dy 4 Shows SMM/SMT and Tb 4 SMT Behavior. Inorg Chem 2024; 63:22338-22348. [PMID: 39264390 DOI: 10.1021/acs.inorgchem.4c02567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/13/2024]
Abstract
Tetranuclear [2 × 2] square-grid-like LnIII clusters have been synthesized by reacting LnCl3·6H2O salts with bis[α-hydroxy(p-bromophenyl)methyl]phosphinic acid [R2PO2H, where R = CH(OH)PhBr] and pivalic acid. Single-crystal X-ray diffraction studies show the formation of [Me4N]2[Ln4(μ2-η1:η1-PO2R2)8(η2-CO2But)4(μ4-CO3)] [Ln = Er (1), Dy (2), and Tb (3)]. Direct-current studies reveal significant ferromagnetic interactions between DyIII in 2 and TbIII in 3 and an antiferromagnetic interaction between ErIII in 1. Dynamic magnetic susceptibility measurements confirm a single-molecule magnet (SMM) behavior in both 0 and 1200 Oe applied magnetic fields for 2. Complexes 2 and 3 show single molecular toroic (SMT) behavior with a mixed magnetic moment.
Collapse
Affiliation(s)
- Suman Mondal
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - Deepanshu Chauhan
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Thierry Guizouarn
- Sciences Chimiques de Rennes, Universite de Rennes 1, UMR 6226, CNRS 263, Avenue du Général Leclerc, Rennes 35042, France
| | - Fabrice Pointillart
- Sciences Chimiques de Rennes, Universite de Rennes 1, UMR 6226, CNRS 263, Avenue du Général Leclerc, Rennes 35042, France
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Alexander Steiner
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD U.K
| | | |
Collapse
|
2
|
Biswas M, Mobin SM, Dey S, Lahiri GK. Diverse Coordination Modes and Bidirectional Noninnocence of Pyridyl-β-diketonate on Ruthenium Platforms as a Function of Coligands. Inorg Chem 2024; 63:13664-13680. [PMID: 38968603 DOI: 10.1021/acs.inorgchem.4c01971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/07/2024]
Abstract
The article demonstrated diverse binding modes of deprotonated 1,3-di(2-pyridinyl)-1,3-propanedione (HL) (κ2-[O,O]-, κ2-[N,O]-, and μ-bis-κ2-[N,O]-) on selective ruthenium platforms: Ru(acac)2 (dimeric [1]ClO4), Ru(bpy)2 (monomeric [2]ClO4), Ru(pap)2 (isomeric monomeric [3]ClO4/[4]ClO4, dimeric [5](ClO4)3), and Ru(PPh3)2(CO) (monomeric 6, isomeric dimeric [7]ClO4/[8]ClO4) (acac = acetylacetonate, bpy = 2,2'-bipyridine, pap = 2-phenylazopyridine). Structural authentication of the complexes revealed (i) diverse binding mode of L- including its unprecedented bridging mode in [8]ClO4, (ii) varying degrees of nonplanarity of L-, and (iii) development of 1D polymeric chains or dimeric/tetrameric forms via intermolecular π-π interactions. The preferential binding feature of L- in the complexes could also be corroborated by their calculated relative energies. The analysis of the multiredox steps of the complexes suggested severe mixing of metal-ligand frontier orbitals, which in effect pinpointed the involvement of L- in both the oxidative and reductive processes along the redox chain, suggesting its bidirectional noninnocence under the present coordination situations. Though α-diketone or β-diketiminate was reported to activate O2 on the selective Ru(acac)2 platform, the inability of analogous β-diketonate-derived [1]ClO4 could be attributed to its calculated greater HOMO-LUMO energy gap, which disfavored electron exchange at the metal(RuIII)-ligand(L-) interface to introduce the required unpaired spin at the ligand backbone toward the 3O2 activation event.
Collapse
Affiliation(s)
- Mitrali Biswas
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Shaikh M Mobin
- Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Khandwa Road, Indore-453552, India
| | - Sanchaita Dey
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Goutam Kumar Lahiri
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| |
Collapse
|
3
|
Miao L, Liu MJ, Zeng M, Kou HZ. Chiral Zn 3Ln 3 Hexanuclear Clusters of an Achiral Flexible Ligand. Inorg Chem 2023; 62:12814-12821. [PMID: 37535927 DOI: 10.1021/acs.inorgchem.3c01449] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Multifunctional single-molecule magnets (SMMs) have sparked great interest, but chiral SMMs obtained via spontaneous resolution are rarely reported. We synthesized a series of chiral trinuclear hepta-coordinate lanthanide complexes [ZnII3LnIII3] (1 for Dy, 2 for Tb, 3 for Gd, and 4 for Dy0.07Y0.93) using the achiral flexible ligand H2L (2,2'-[1,2-ethanediylbis[(ethylimino)methylene]]bis[3,5-dimethylphenol]). The complexes crystallize in the chiral P63 group space, and two enantiomers of different chirality are spontaneously resolved. Three [Zn(L)Cl]- anions utilize the two phenoxy oxygen atoms of each L2- to coordinate with three lanthanide ions, respectively, and the three hepta-coordinate D5h lanthanide ions are arranged in a triangle. The chirality comes from the propeller arrangement of the peripheral three bidentate chelate L2- ligands like octahedral [M(AA)3]n+/- (M = transition metal ions; AA = bidentate chelate ligands, e.g., 2,2'-bipyridine, 1,10-phenathroline, ethylenediamine, acac- or oxalate). Complex 1 exhibits an AC susceptibility signal and is frequency-dependent, which is typical of SMMs. Complex 4, doped with a large amount of diamagnetic Y(III) in Dy(III), exhibits Ueff = 48.3 K and τ0 = 4.4 × 10-8 s in experiments. Complex 2 shows circularly polarized luminescence and apparent photoluminescence, typical of the f-f transitions of Tb(III).
Collapse
Affiliation(s)
- Lin Miao
- Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
| | - Mei-Jiao Liu
- Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
| | - Min Zeng
- Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
| | - Hui-Zhong Kou
- Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
| |
Collapse
|
4
|
Wang H, Zhu Z, La Droitte L, Liao W, Cador O, Le Guennic B, Tang J. Toroidal moment and dynamical control in luminescent 1D and 3D terbium calixarene compounds. Chem Sci 2023; 14:7208-7214. [PMID: 37416717 PMCID: PMC10321477 DOI: 10.1039/d3sc00541k] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 06/05/2023] [Indexed: 07/08/2023] Open
Abstract
A toroidal moment can be generated spontaneously in inorganic (atom-based) ferrotoroidic materials that breaks both time-reversal and space-inversion symmetries, attracting great attention in solid-state chemistry and physics. In the field of molecular magnetism, it can also be achieved in lanthanide (Ln) involved metal-organic complexes usually with a wheel-shaped topological structure. Such complexes are called single-molecule toroics (SMTs), presenting unique advantages in spin chirality qubits and magnetoelectric coupling. However, to date, the synthetic strategies of SMTs have remained elusive, and the covalently bonded three-dimensional (3D) extended SMT has not hitherto been synthesized. Here, two luminescent Tb(iii)-calixarene aggregates with architectures of 1D chain (1) and 3D network (2) both containing the square Tb4 unit have been prepared. Their SMT characteristics deriving from the toroidal arrangement of the local magnetic anisotropy axes of Tb(iii) ions in the Tb4 unit have been investigated experimentally with the support of ab initio calculations. To the best of our knowledge, 2 is the first covalently bonded 3D SMT polymer. Remarkably, solvato-switching of SMT behavior has also been achieved for the first time by desolvation and solvation processes of 1.
Collapse
Affiliation(s)
- Hao Wang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun 130022 China
- School of Applied Chemistry and Engineering, University of Science and Technology of China Hefei 230026 China
| | - Zhenhua Zhu
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun 130022 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Léo La Droitte
- Univ. Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226 Rennes F-35000 France
| | - Wuping Liao
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun 130022 China
- School of Applied Chemistry and Engineering, University of Science and Technology of China Hefei 230026 China
- Ganjiang Innovation Academy, Chinese Academy of Sciences Ganzhou 341000 China
| | - Olivier Cador
- Univ. Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226 Rennes F-35000 France
| | - Boris Le Guennic
- Univ. Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226 Rennes F-35000 France
| | - Jinkui Tang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun 130022 China
- School of Applied Chemistry and Engineering, University of Science and Technology of China Hefei 230026 China
| |
Collapse
|
5
|
Chappidi DY, Gordon MN, Ashberry HM, Huang J, Labedis BM, Cooper RE, Cooper BJ, Carta V, Skrabalak SE, Dunbar KR, Fatila EM. Mechanochemical Syntheses of Ln(hfac) 3(H 2O) x (Ln = La-Sm, Tb): Isolation of 10-, 9-, and 8-Coordinate Ln(hfac) n Complexes. Inorg Chem 2022; 61:12197-12206. [PMID: 35892174 PMCID: PMC9374134 DOI: 10.1021/acs.inorgchem.2c01274] [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: 11/30/2022]
Abstract
![]()
Volatile lanthanide coordination complexes are critical
to the
generation of new optical and magnetic materials. One of the most
common precursors for preparing volatile lanthanide complexes is the
hydrate with the general formula Ln(hfac)3(H2O)x (x = 3 for La-Nd, x = 2 for Sm) (hfac = 1,1,1,5,5,5-hexafluoroacetylacetonato).
We have investigated the synthesis of Ln(hfac)3(H2O)x using more environmentally sustainable
mechanochemical approaches. Characterization of the products using
Fourier transform infrared spectroscopy, nuclear magnetic resonance
spectroscopy, elemental analysis, and powder X-ray diffraction shows
substantial differences in product distribution between methods. The
mechanochemical synthesis of the hydrate complexes leads to a variety
of coordination compounds including the expected hydrate product,
the known retro-Claisen impurity, and hydrated protonated Hhfac ligand
depending on the technique employed. Surprisingly, 10-coordinate complexes
of the form Na2Ln(hfac)5·3H2O for Ln = La-Nd were also isolated from reactions using a mortar
and pestle. The electrostatic bonding of lanthanide coordination complexes
is a challenge for obtaining reproducible reactions and clean products.
The reproducibility issues are most acute for the large, early lanthanides
whereas for the mid to late lanthanides, reproducibility in terms
of product distribution and yield is less of an issue because of their
smaller size and greater charge to radius ratio. Ball milling increases
reproducibility in terms of generating the desired Ln(hfac)3(H2O)x along with hydrated
Hhfac (tetraol) and free Hhfac products. The results illustrate the
dynamic behavior of lanthanide complexes in solution and the solid
state as well as the structural diversity available to the early lanthanides. Mechanochemical reactions to prepare
Ln(hfac)3(H2O)x (Ln
= La-Sm, Tb) complexes
are used to illustrate the highly variable coordination chemistry
of the early lanthanides compared to the mid-lanthanides. Using either
a mortar and pestle or ball mill results in unexpected products and
different product distributions. An open mortar and pestle can yield
10-coordinate pentakis-hfac complexes of La, Ce, Pr, and Nd, whereas
ball milling consistently results in Ln(hfac)3(H2O)x complexes with volatile Hhfac and
hydrated Hhfac·2H2O (tetraol) that can be removed
by vacuum.
Collapse
Affiliation(s)
- Deepthi Y Chappidi
- Department of Chemistry and Physics, Louisiana Tech University, 1 Adams Blvd., Ruston, Louisiana 71272, United States
| | - Matthew N Gordon
- Department of Chemistry, Indiana University Bloomington, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, United States
| | - Hannah M Ashberry
- Department of Chemistry, Indiana University Bloomington, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, United States
| | - Junjie Huang
- Department of Chemistry, Texas A & M University, College Station, Texas 77842, United States
| | - Bruce M Labedis
- Department of Chemistry and Physics, Louisiana Tech University, 1 Adams Blvd., Ruston, Louisiana 71272, United States
| | - Riley E Cooper
- Department of Chemistry and Physics, Louisiana Tech University, 1 Adams Blvd., Ruston, Louisiana 71272, United States
| | - Brandon J Cooper
- Department of Chemistry and Physics, Louisiana Tech University, 1 Adams Blvd., Ruston, Louisiana 71272, United States
| | - Veronica Carta
- Department of Chemistry, Indiana University Bloomington, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, United States
| | - Sara E Skrabalak
- Department of Chemistry, Indiana University Bloomington, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, United States
| | - Kim R Dunbar
- Department of Chemistry, Texas A & M University, College Station, Texas 77842, United States
| | - Elisabeth M Fatila
- Department of Chemistry and Physics, Louisiana Tech University, 1 Adams Blvd., Ruston, Louisiana 71272, United States
| |
Collapse
|
6
|
Wang W, Shang T, Wang J, Yao BL, Li LC, Ma Y, Wang QL, Zhang YZ, Zhang YQ, Zhao B. Slow magnetic relaxation in a Dy 3 triangle and a bistriangular Dy 6 cluster. Dalton Trans 2022; 51:9404-9411. [PMID: 35674238 DOI: 10.1039/d1dt03414f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Two lanthanide single-molecule magnets (SMMs) [Dy3(μ3-OH)(HL-1)3(H2O)3](NO3)2·3H3O (1, H3L-1 = (E)-3-(((8-hydroxyquinolin-2-yl)methylene)amino)propane-1,2-diol) and [Dy6(μ3-OH)4(H2L-2)4(HL-2)2(L-2)2] (2, H3L-2 = (E)-2-hydroxy-N'-(2-hydroxy-3-methoxybenzylidene)benzohydrazide) were synthesized and characterized structurally and magnetically. Complex 1 contains a triangular Dy3 core in which the three Dy3+ ions share a μ3-OH- anion and the deprotonated ligands of (HL-1)2- serve both capping and bridging functions, while 2 displays a centrosymmetric hexanuclear DyIII structure with two similar Dy3 triangular cores ligated by two fully deprotonated (L-2)3- ligands, each of which shares two μ3-OH- anions. All the DyIII ions are eight-coordinated with quasi D2d or C2v symmetry. Magnetic studies reveal that 1 exhibited two-step magnetic relaxation under an applied dc field of 800 Oe, with effective energy barriers of 40.1 and 31.0 K for the slow relaxation (SR) and fast relaxation regimes (FR), respectively. Meanwhile, 2 only showed a tail of slow magnetic relaxation at above 2 K. Ab initio calculations have been carried out to show the nature of their different magnetic properties.
Collapse
Affiliation(s)
- Wen Wang
- Department of Chemistry and Key Laboratory of Advanced Energy Materials Chemistry (MOE) and TKL of Metal and Molecule Based Material Chemistry, Nankai University, Tianjin 300071, China.
| | - Tao Shang
- Jiangsu Key Lab for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, P. R. China.
| | - Juan Wang
- Department of Chemistry and Key Laboratory of Advanced Energy Materials Chemistry (MOE) and TKL of Metal and Molecule Based Material Chemistry, Nankai University, Tianjin 300071, China.
| | - Bin-Ling Yao
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, P. R. China.
| | - Li-Cun Li
- Department of Chemistry and Key Laboratory of Advanced Energy Materials Chemistry (MOE) and TKL of Metal and Molecule Based Material Chemistry, Nankai University, Tianjin 300071, China.
| | - Yue Ma
- Department of Chemistry and Key Laboratory of Advanced Energy Materials Chemistry (MOE) and TKL of Metal and Molecule Based Material Chemistry, Nankai University, Tianjin 300071, China.
| | - Qing-Lun Wang
- Department of Chemistry and Key Laboratory of Advanced Energy Materials Chemistry (MOE) and TKL of Metal and Molecule Based Material Chemistry, Nankai University, Tianjin 300071, China.
| | - Yuan-Zhu Zhang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, P. R. China.
| | - Yi-Quan Zhang
- Jiangsu Key Lab for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, P. R. China.
| | - Bin Zhao
- Department of Chemistry and Key Laboratory of Advanced Energy Materials Chemistry (MOE) and TKL of Metal and Molecule Based Material Chemistry, Nankai University, Tianjin 300071, China.
| |
Collapse
|
7
|
Vignesh KR, Rajaraman G. Strategies to Design Single-Molecule Toroics Using Triangular {Ln 3} n Motifs. ACS OMEGA 2021; 6:32349-32364. [PMID: 34901588 PMCID: PMC8655769 DOI: 10.1021/acsomega.1c05310] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 11/12/2021] [Indexed: 06/14/2023]
Abstract
In this mini-review, we highlight the research advanced in the field of single-molecule toroics (SMTs) with a specific focus on the triangular Ln3-based SMTs. SMTs are molecules with a toroidal magnetic state and are insensitive to homogeneous magnetic fields but cooperate with charge and spin currents. The rapid growth in the area of SMTs witnessed in recent years is correlated not only to the interest to understand the fundamental physics of these molecules but also to the intriguing potential applications proposed, as the SMTs have several advantages compared to other classes of molecules such as single-molecule magnets (SMMs). The important chemico-structural strategy in SMT chemistry is to choose and design ligand and bridging species that will help to attain toroidal behavior. Considering this primarily, all the Dy3 SMTs reported so far are summarized, showing how utilizing different peripheral ligands influences the toroidal nature beyond the role of the symmetry of the molecule and stronger dipolar interactions. Likewise, linking Dy3 toroidal units through 3d ions with suitable peripheral/bridging ligands enhances the toroidal magnetic moment and leads to fascinating physics of ferrotoroidal/antiferrotoridal behavior. Further, we have also summarized the recently reported non-Dy triangular SMTs.
Collapse
|