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Selikhov AN, Félix G, Lyubov DM, Nelyubina YV, Cherkasov AV, Sene S, Taydakov IV, Metlin MT, Tyutyunov AA, Guari Y, Larionova J, Trifonov AA. Luminescent Er 3+ based single molecule magnets with fluorinated alkoxide or aryloxide ligands. Dalton Trans 2024; 53:6352-6366. [PMID: 38488577 DOI: 10.1039/d3dt04375d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
We report the synthesis, structures, and magnetic and luminescence properties of a series of new mono- and dinuclear Er3+ complexes derived from sterically demanding aryloxide and fluorinated alkoxide ligands: [4-tBu-2,6-(Ph2CH)2C6H2O]3Er(THF) (1), [(C6F5)3CO]3Er(Me3SiOH) (2), [(C6F5)3CO]3Er[(Me3Si)2NH] (3), [(C6F5)3CO]3Er(C6H5CH3) (4), [(C6F5)3CO]3Er(o-Me2NC6H4CH3) (5) and {[Ph(CF3)2CO]2Er(μ2-OC(CF3)2Ph)}2 (6). In compounds 1, 2, and 4, the Er3+ ion is four-coordinated and adopts a distorted trigonal pyramidal geometry, while in 3, 5, and 6, the coordination geometry of Er3+ is impacted by the presence of several relatively short Er⋯F distances, making them rather 6-coordinated. All compounds behave as field-induced Single Molecule Magnets (SMMs) and exhibit an Er3+ characteristic near infrared (NIR) emission associated with the 4I13/2 → 4I15/2 transition with a remarkably long lifetime going up to 73 μs, which makes them multifunctional luminescent SMMs. The deconvolution of the NIR emission spectra allowed us to provide a direct probe of the crystal field splitting in these compounds, which was correlated with magnetic data.
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Affiliation(s)
- Alexander N Selikhov
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str., 119334, Moscow, Russia.
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia
| | - Gautier Félix
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France.
| | - Dmitry M Lyubov
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str., 119334, Moscow, Russia.
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia
| | - Yulia V Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str., 119334, Moscow, Russia.
| | - Anton V Cherkasov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia
| | - Saad Sene
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France.
| | - Ilya V Taydakov
- P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Leninskiy Prospect 53, 119991, Moscow, Russia
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky Prospect, 47, 119991, Moscow, Russia
| | - Mikhail T Metlin
- P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Leninskiy Prospect 53, 119991, Moscow, Russia
| | - Andrey A Tyutyunov
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str., 119334, Moscow, Russia.
| | - Yannick Guari
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France.
| | | | - Alexander A Trifonov
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str., 119334, Moscow, Russia.
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia
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2
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Ali J, Kumar P, Chandrasekhar V. Lanthanide Phosphonates and Phosphates in Molecular Magnetism. Chem Asian J 2024; 19:e202300812. [PMID: 37961926 DOI: 10.1002/asia.202300812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/08/2023] [Accepted: 11/10/2023] [Indexed: 11/15/2023]
Abstract
Phosphonate and phosphate ligands have historically received less attention when compared to the widely prevalent carboxylate ligand system. Phosphonates possess multiple donating sites, often leading to the formation of larger aggregates with limited solubility. Conversely, the P-O bond within phosphates is highly susceptible to hydrolysis, resulting in the precipitation of insoluble compounds, particularly when interacting with lanthanide metal ions. However, over the past few decades, various synthetic approaches have emerged for the preparation and characterization of lanthanide complexes involving both phosphonate and phosphate ligands. Consequently, researchers have delved into exploring the magnetic properties of these complexes, such as their potential as single molecule magnets (SMMs) and their ability to exhibit a magnetocaloric effect (MCE). This review will encompass an examination of the crystal structures and magnetic characteristics of lanthanide complexes featuring phosphonate and phosphate ligands.
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Affiliation(s)
- Junaid Ali
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad, 500046, India
| | - Pawan Kumar
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad, 500046, India
| | - Vadapalli Chandrasekhar
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad, 500046, India
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
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3
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Hou Z, Huang Y, Ruan Y, Xu H, Tan Y, Lin LR, Wu ZY. Reversible trans-to- cis photoisomerization and irreversible photocyclization reactions of a Co-coordinated stilbene derivative on chiral di-β-diketonate lanthanide complexes. RSC Adv 2023; 13:2269-2282. [PMID: 36741132 PMCID: PMC9837704 DOI: 10.1039/d2ra07133a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 01/02/2023] [Indexed: 01/15/2023] Open
Abstract
Six lanthanide complexes constructed from two chiral β-diketonates (d/l-fbc = 3-heptafluorobutyryl-(+)/(-)-camphorate), the stilbene derivative (E)-N',N'-bis(pyridin-2-ylmethyl)-4-styrylbenzoyl hydrazide (L), a trifluoroacetate anion (CF3CO2 -), and one water molecule, namely [Ln(d/l-fbc)2(L)(CF3CO2)]·H2O (LnC57H54F17N4O8, Ln = La (1, d-fbc), La (2, l-fbc), Sm (3, d-fbc), Eu (4, d-fbc), Eu (5, l-fbc), and Tb (6, d-fbc), were synthesized and characterized by single-crystal X-ray diffraction, 1H-NMR, elemental analysis, IR and UV-vis spectroscopy, and thermal gravimetric analysis. The photoisomerization reactions of these complexes were systematically studied by means of experimental and theoretical calculations. Crystals of complexes 1, 2, 3, and 4 were obtained and belong to the monoclinic crystal system and the C2 chiral space group. The Λ- and Δ-diastereomers coexist in their crystals and no apparent bisignate couplets are observed in their ECD spectra. Among the complexes, the photocyclization reaction is followed by the trans-to-cis photoisomerization reaction and competes with the trans-to-cis photoisomerization, then the photocyclization reaction continues. The photocyclization reaction is irreversible in this stilbene derivative and is delayed in the lanthanide complexes. These results provide a viable strategy for the design of promising new stilbene-attached dual-functional lanthanide-based optical-switching materials.
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Affiliation(s)
- Ziting Hou
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen UniversityXiamen361005P. R. China
| | - Yanji Huang
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen UniversityXiamen361005P. R. China
| | - Yushan Ruan
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen UniversityXiamen361005P. R. China
| | - Han Xu
- School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical UniversityKunming650500P. R. China
| | - Yu Tan
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen UniversityXiamen361005P. R. China
| | - Li-Rong Lin
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen UniversityXiamen361005P. R. China
| | - Zhen-yi Wu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen UniversityXiamen361005P. R. China
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4
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Ma XF, Guo Y, Huang XD, Wen GH, Bao SS, Zhang YQ, Zheng LM. Polymorphism modulates photoluminescence and magnetic dynamics of mononuclear dysprosium-anthracene complexes. Dalton Trans 2022; 51:12026-12030. [PMID: 35904084 DOI: 10.1039/d2dt01710e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Complexes α-Dy(depma)3Cl3 (α-DyCl), β-Dy(depma)3Cl3 (β-DyCl) and β-Dy(depma)3Br3 (β-DyBr) (depma = 9-diethylphosphono-methylanthracene) are reported. α-DyCl and β-DyCl are polymorphs showing distinct magnetic dynamics with energy barriers of 32.3 K and 66.6 K. They also show distinct luminescence properties with emission peaks at 487 nm and 530 nm, respectively.
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Affiliation(s)
- Xiu-Fang Ma
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing 210023, P. R. China.
| | - Ying Guo
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, China.
| | - Xin-Da Huang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing 210023, P. R. China.
| | - Ge-Hua Wen
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing 210023, P. R. China.
| | - Song-Song Bao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing 210023, P. R. China.
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, China.
| | - Li-Min Zheng
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing 210023, P. R. China.
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5
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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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6
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Fan K, Bao S, Yu Z, Huang X, Liu Y, Kurmoo M, Zheng L. Engineering Heteronuclear Arrays from
Ir
III
‐Metalloligand
and
Co
II
Showing Coexistence of Slow Magnetization Relaxation and Photoluminescence. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202100783] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Kun Fan
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing Jiangsu 210023 China
| | - Song‐Song Bao
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing Jiangsu 210023 China
| | - Zi‐Wen Yu
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing Jiangsu 210023 China
| | - Xin‐Da Huang
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing Jiangsu 210023 China
| | - Yu‐Jie Liu
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing Jiangsu 210023 China
| | - Mohamedally Kurmoo
- Institut de Chimie Université de Strasbourg CNRS‐UMR7177 4 rue Blaise Pascal Strasbourg Cedex 67007 France
| | - Li‐Min Zheng
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing Jiangsu 210023 China
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7
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Huang XD, Sun GB, Chen YQ, Wen GH, Bao SS, Zheng LM. Photoresponsive gadolinium-anthracene complexes: tuning the orientation and π-π stacking of anthracene groups via alkyl ester substituent of the phosphonate ligand. CrystEngComm 2022. [DOI: 10.1039/d2ce01012g] [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
Controlled assembly of metal-anthracene complexes is important for the development of smart photoresponsive materials based on [4+4] anthracene photocycloaddition reactions. Here, we report three mononuclear complexes containing two anthracene units,...
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8
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Zeng D, Ren M, Bao SS, Zheng T. Two three-dimensional mixed-ligated cobalt phosphonate coordination polymers: Syntheses, crystal structures and magnetic properties. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131456] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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9
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Sun G, Huang X, Shang T, Yan S, Bao S, Lu X, Zhang Y, Zheng L. Polar Lanthanide Anthracene Complexes Exhibiting Magnetic, Luminescent and Dielectric Properties. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100538] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Guo‐Bin Sun
- State Key Laboratory of Coordination Chemistry Coordination Chemistry Institute School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
- Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China
| | - Xin‐Da Huang
- State Key Laboratory of Coordination Chemistry Coordination Chemistry Institute School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
- Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China
| | - Tao Shang
- Jiangsu Key Laboratory for NSLSCS School of Physical Science and Technology Nanjing Normal University Nanjing 210023 China
| | - Shuo Yan
- National Laboratory of Solid State Microstructures and Physics School Nanjing University Nanjing 210093 China
- Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China
| | - Song‐Song Bao
- State Key Laboratory of Coordination Chemistry Coordination Chemistry Institute School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
- Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China
| | - Xiao‐Mei Lu
- National Laboratory of Solid State Microstructures and Physics School Nanjing University Nanjing 210093 China
- Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China
| | - Yi‐Quan Zhang
- Jiangsu Key Laboratory for NSLSCS School of Physical Science and Technology Nanjing Normal University Nanjing 210023 China
| | - Li‐Min Zheng
- State Key Laboratory of Coordination Chemistry Coordination Chemistry Institute School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
- Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China
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10
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Liu J, Zou Q, Huang X, Bao S, Zheng L. Dysprosium Coordination Polymer Incorporating Dianthracene: Thermo‐induced Phase Transition Accompanied with Magnetic and Optical Changes. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100138] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Jing‐Cui Liu
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 China
| | - Qian Zou
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 China
| | - Xin‐Da Huang
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 China
| | - Song‐Song Bao
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 China
| | - Li‐Min Zheng
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 China
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11
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Zou Q, Liu JC, Huang XD, Bao SS, Zheng LM. Thermo-induced structural transformation with synergistic optical and magnetic changes in ytterbium and erbium complexes. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.10.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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12
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Yang TH, Wang SF, Lin CL, Wang X, Zhu B, Wu D. Ionothermal synthesis of octahedral lanthanoid coordination networks exhibiting slow magnetization relaxation and efficient photoluminescence. Dalton Trans 2021; 50:1293-1299. [PMID: 33393532 DOI: 10.1039/d0dt03353g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An ionothermal reaction of lanthanoid salts with tetraethyl-p-xylenediphosphonate (tepxdp) in ionic liquids, such as choline chloride and malonic acid, resulted in the formation of three novel lanthanoid-organic coordination networks with the formula [Ln(H2pxdp)1.5]n {Ln = Tb (1), Dy (2) and Ho(3) and H4pxdp = p-xylenediphosphonic acid}. The structures, photoluminescence and magnetic properties of the three compounds were investigated in detail. Single crystal X-ray diffraction analysis revealed that the three compounds are isostructural and the Ln3+ ions show an unusual six-coordinate environment with the {LnO6} octahedron. In these compounds, each {PO3C} tetrahedron is corner-shared with two {LnO6} octahedra and each {LnO6} octahedron is corner-shared with six {PO3C} tetrahedra, thus forming an inorganic layer in the crystallographic ab plane. The inorganic layers are further connected by a phenyl group, leading to a three-dimensional framework. Compound 1 exhibits the strong and characteristic emission of TbIII with an impressive quantum yield of 46.2%. Detailed magnetic analysis demonstrated that compound 2 displays a slow magnetic relaxation of magnetization with multiple relaxation mechanisms. The anisotropic energy barrier and the pre-exponential factor τ0 are 51.2 K and 3.9 × 10-7 s, respectively, in the presence of a direct-current field of 500 Oe. This work demonstrates a successful strategy to isolate octahedrally coordinated lanthanoid complexes through ionothermal synthesis to exhibit the single-ion-magnet-like behaviour and photoluminescence properties.
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Affiliation(s)
- Ting-Hai Yang
- School of Chemistry & Environmental Engineering, Jiangsu University of Technology, Changzhou 23001, P. R. China. and State Key Laboratory of Coordination Chemistry, School of Chemistry & Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Shu-Fan Wang
- School of Chemistry & Environmental Engineering, Jiangsu University of Technology, Changzhou 23001, P. R. China.
| | - Chen-Lan Lin
- School of Chemistry & Environmental Engineering, Jiangsu University of Technology, Changzhou 23001, P. R. China.
| | - Xin Wang
- School of Chemistry & Environmental Engineering, Jiangsu University of Technology, Changzhou 23001, P. R. China.
| | - Binglong Zhu
- School of Chemistry & Environmental Engineering, Jiangsu University of Technology, Changzhou 23001, P. R. China.
| | - Dayu Wu
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China.
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13
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Liu CM, Hao X. Magnetic relaxation in two chain-like Zn2Dy2 Schiff base coordination polymers bridged by tetraoxolene and its one-electron reduced radical. NEW J CHEM 2021. [DOI: 10.1039/d1nj04299h] [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
Two chain-like Zn–Dy anilate radical coordination polymers with Schiff base ligands show magnetic relaxation behaviors.
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Affiliation(s)
- Cai-Ming Liu
- Beijing National Laboratory for Molecular Sciences, Center for Molecular Science, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiang Hao
- Beijing National Laboratory for Molecular Sciences, Center for Molecular Science, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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14
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Babeshkin KA, Gavrikov AV, Petrosyants SP, Ilyukhin AB, Belova EV, Efimov NN. Unexpected Supremacy of Non‐Dysprosium Single‐Ion Magnets within a Series of Isomorphic Lanthanide Cyanocobaltate(III) Complexes. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000798] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Konstantin A. Babeshkin
- N.S. Kurnakov Institute of General and Inorganic Chemistry Russian Academy of Sciences Leninsky prosp. 31 119991 Moscow Russian Federation
| | - Andrey V. Gavrikov
- N.S. Kurnakov Institute of General and Inorganic Chemistry Russian Academy of Sciences Leninsky prosp. 31 119991 Moscow Russian Federation
| | - Svetlana P. Petrosyants
- N.S. Kurnakov Institute of General and Inorganic Chemistry Russian Academy of Sciences Leninsky prosp. 31 119991 Moscow Russian Federation
| | - Andrey B. Ilyukhin
- N.S. Kurnakov Institute of General and Inorganic Chemistry Russian Academy of Sciences Leninsky prosp. 31 119991 Moscow Russian Federation
| | - Ekaterina V. Belova
- N.S. Kurnakov Institute of General and Inorganic Chemistry Russian Academy of Sciences Leninsky prosp. 31 119991 Moscow Russian Federation
- Department of Chemistry Lomonosov Moscow State University GSP1 119991 Moscow Russian Federation
| | - Nikolay N. Efimov
- N.S. Kurnakov Institute of General and Inorganic Chemistry Russian Academy of Sciences Leninsky prosp. 31 119991 Moscow Russian Federation
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15
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Huang XD, Wen GH, Bao SS, Jia JG, Zheng LM. Thermo- and light-triggered reversible interconversion of dysprosium-anthracene complexes and their responsive optical, magnetic and dielectric properties. Chem Sci 2020; 12:929-937. [PMID: 34163859 PMCID: PMC8178979 DOI: 10.1039/d0sc04851h] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 11/10/2020] [Indexed: 12/15/2022] Open
Abstract
Artificial smart materials with switchable multifunctionality are of immense interest owing to their wide application in sensors, displays and memory devices. Lanthanide complexes are promising multifunctional materials integrating optical and magnetic characteristics. However, synergistic manipulation of different physical properties in lanthanide systems is still challenging. Herein we designed and synthesized a mononuclear complex [DyIII(SCN)3(depma)2(4-hpy)2] (1), which incorporates 9-diethylphosphonomethylanthracene (depma) as a photo-active component and 4-hydroxypyridine (4-hpy) as a polar component. This compound shows several unusual features: (a) reversible thermo-responsive phase transition associated with the order-disorder transition of 4-hpy and SCN-, which leads to thermochromic behavior and dielectric anomaly; (b) reversible photo-induced dimerization of anthracene groups, which leads to synergistic switching of luminescence, magnetic and dielectric properties. To our knowledge, compound 1 is the first example of lanthanide complexes that show stimuli-triggered synergistic and reversible switching of luminescence, magnetic and dielectric properties.
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Affiliation(s)
- Xin-Da Huang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University Nanjing 210023 P. R. China
| | - Ge-Hua Wen
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University Nanjing 210023 P. R. China
| | - Song-Song Bao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University Nanjing 210023 P. R. China
| | - Jia-Ge Jia
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University Nanjing 210023 P. R. China
| | - Li-Min Zheng
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University Nanjing 210023 P. R. China
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16
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Lin CL, Chen YF, Qiu LJ, Zhu B, Wang X, Luo SP, Shi W, Yang TH, Lei W. Synthesis, structure and photocatalytic properties of coordination polymers based on pyrazole carboxylic acid ligands. CrystEngComm 2020. [DOI: 10.1039/d0ce01054e] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The photocatalytic activities of two novel different 2-D coordination polymers constructed from 5-hydroxy-1H-pyrazole-3-carboxylic acid ligand have been explored.
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Affiliation(s)
- Chen-Lan Lin
- School of Chemistry & Environmental Engineering
- Jiangsu University of Technology
- Changzhou 23001
- P. R. China
| | - Yan-Fei Chen
- School of Chemistry & Environmental Engineering
- Jiangsu University of Technology
- Changzhou 23001
- P. R. China
| | - Li-Juan Qiu
- School of Chemistry & Environmental Engineering
- Jiangsu University of Technology
- Changzhou 23001
- P. R. China
| | - Binglong Zhu
- School of Chemistry & Environmental Engineering
- Jiangsu University of Technology
- Changzhou 23001
- P. R. China
| | - Xin Wang
- School of Chemistry & Environmental Engineering
- Jiangsu University of Technology
- Changzhou 23001
- P. R. China
| | - Shi-Peng Luo
- School of Chemistry & Environmental Engineering
- Jiangsu University of Technology
- Changzhou 23001
- P. R. China
| | - Wenyan Shi
- School of Chemistry & Chemical Engineering
- Yancheng Insititute of Technology
- Yancheng 224051
- P. R. China
- School of Chemical Engineering
| | - Ting-Hai Yang
- School of Chemistry & Environmental Engineering
- Jiangsu University of Technology
- Changzhou 23001
- P. R. China
| | - Wu Lei
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- P. R. China
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17
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Fan K, Bao SS, Huo R, Huang XD, Liu YJ, Yu ZW, Kurmoo M, Zheng LM. Luminescent Ir(iii)–Ln(iii) coordination polymers showing slow magnetization relaxation. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01504c] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two structural types of iridium(iii)–lanthanide(iii) coordination polymers, single-chain Ir2Ln and double-chain Ir4Ln2 (Ln = Gd, Dy, Er, and Yb), have been prepared. SMM behaviour and NIR luminescence were observed for the Ir–Er and Ir–Yb systems.
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Affiliation(s)
- Kun Fan
- State Key Laboratory of Coordination Chemistry
- Coordination Chemistry Institute
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
| | - Song-Song Bao
- State Key Laboratory of Coordination Chemistry
- Coordination Chemistry Institute
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
| | - Ran Huo
- State Key Laboratory of Coordination Chemistry
- Coordination Chemistry Institute
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
| | - Xin-Da Huang
- State Key Laboratory of Coordination Chemistry
- Coordination Chemistry Institute
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
| | - Yu-Jie Liu
- State Key Laboratory of Coordination Chemistry
- Coordination Chemistry Institute
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
| | - Zi-Wen Yu
- State Key Laboratory of Coordination Chemistry
- Coordination Chemistry Institute
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
| | - Mohamedally Kurmoo
- Institut de Chimie
- Université de Strasbourg CNRS-UMR7177
- Strasbourg Cedex 67007
- France
| | - Li-Min Zheng
- State Key Laboratory of Coordination Chemistry
- Coordination Chemistry Institute
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
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18
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Musib D, Pal M, Raza MK, Roy M. Photo-physical, theoretical and photo-cytotoxic evaluation of a new class of lanthanide(iii)–curcumin/diketone complexes for PDT application. Dalton Trans 2020; 49:10786-10798. [DOI: 10.1039/d0dt02082f] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Improved ISC in La(iii) complex of curcumin, on activation with visible light, has resulted in high yield of 1O2 in HeLa/MCF-7 cells, leading to the oxidative stress which was responsible for remarkable caspase 3/7-dependent apoptotic photocytotoxicity.
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Affiliation(s)
- Dulal Musib
- Department of Chemistry
- National Institute of Technology Manipur
- Imphal
- India
| | - Mrityunjoy Pal
- Department of Chemistry
- National Institute of Technology Manipur
- Imphal
- India
| | - Md Kausar Raza
- Department of Inorganic and Physical Chemistry
- Indian Institute of Science
- Bangalore-560012
- India
| | - Mithun Roy
- Department of Chemistry
- National Institute of Technology Manipur
- Imphal
- India
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19
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Lu F, Ding MM, Li JX, Wang BL, Zhang YQ. Why lanthanide ErIII SIMs cannot possess huge energy barriers: a theoretical investigation. Dalton Trans 2020; 49:14576-14583. [DOI: 10.1039/d0dt02868a] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
It is difficult for ErIII-based SIMs to possess energy barriers as high as DyIII through enhancing the surrounding equatorially coordinated ligand field.
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Affiliation(s)
- Fang Lu
- Jiangsu Key Lab for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- P. R. China
| | - Man-Man Ding
- Jiangsu Key Lab for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- P. R. China
| | - Jia-Xin Li
- Jiangsu Key Lab for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- P. R. China
| | - Bao-Lin Wang
- Jiangsu Key Lab for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- 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
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20
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Peng G, Chen Y, Li B. One-dimensional lanthanide coordination polymers supported by pentadentate Schiff-base and diphenyl phosphate ligands: single molecule magnet behavior and photoluminescence. NEW J CHEM 2020. [DOI: 10.1039/d0nj00533a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four one-dimensional lanthanide coordination polymers constructed from Ln2 dimers showing single molecule magnet behavior and photoluminescence are reported.
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Affiliation(s)
- Guo Peng
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Yue Chen
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Bo Li
- College of Chemistry and Pharmaceutical Engineering
- Nanyang Normal University
- Nanyang 473061
- P. R. China
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21
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Liu CM, Zhang DQ, Hao X, Zhu DB. Assembly of chiral 3d–4f wheel-like cluster complexes with achiral ligands: single-molecule magnetic behavior and magnetocaloric effect. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00632g] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
With the help of perchlorate ions, chiral M3Ln3 wheel-like cluster complexes were constructed from achiral ligands, and showed single-molecule magnetic behavior and magnetocaloric effect.
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Affiliation(s)
- Cai-Ming Liu
- Beijing National Laboratory for Molecular Sciences
- Center for Molecular Science
- Key Laboratory of Organic Solids
- Institute of Chemistry
- Chinese Academy of Sciences
| | - De-Qing Zhang
- Beijing National Laboratory for Molecular Sciences
- Center for Molecular Science
- Key Laboratory of Organic Solids
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Xiang Hao
- Beijing National Laboratory for Molecular Sciences
- Center for Molecular Science
- Key Laboratory of Organic Solids
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Dao-Ben Zhu
- Beijing National Laboratory for Molecular Sciences
- Center for Molecular Science
- Key Laboratory of Organic Solids
- Institute of Chemistry
- Chinese Academy of Sciences
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22
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Fondo M, Corredoira-Vázquez J, García-Deibe AM, Sanmartín-Matalobos J, Amoza M, Botas AMP, Ferreira RAS, Carlos LD, Colacio E. Field-induced slow magnetic relaxation and luminescence thermometry in a mononuclear ytterbium complex. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00637h] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A mononuclear pentagonal bipyramidal YbIII complex functions as a field-induced SIM luminescent thermometer.
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Affiliation(s)
- Matilde Fondo
- Departamento de Química Inorgánica
- Facultade de Química
- Universidade de Santiago de Compostela
- Spain
| | - Julio Corredoira-Vázquez
- Departamento de Química Inorgánica
- Facultade de Química
- Universidade de Santiago de Compostela
- Spain
| | - Ana M. García-Deibe
- Departamento de Química Inorgánica
- Facultade de Química
- Universidade de Santiago de Compostela
- Spain
| | | | - Martín Amoza
- Departamento de Química Inorgánica
- Facultade de Química
- Universidade de Santiago de Compostela
- Spain
| | - Alexandre M. P. Botas
- Phantom-g
- CICECO – Aveiro Institute of Materials
- Department of Physics
- University of Aveiro
- 3810-193 – Aveiro
| | - Rute A. S. Ferreira
- Phantom-g
- CICECO – Aveiro Institute of Materials
- Department of Physics
- University of Aveiro
- 3810-193 – Aveiro
| | - Luís D. Carlos
- Phantom-g
- CICECO – Aveiro Institute of Materials
- Department of Physics
- University of Aveiro
- 3810-193 – Aveiro
| | - Enrique Colacio
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- 18071 Granada
- Spain
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23
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Liu CM, Zhang DQ, Hao X, Zhu DB. Zn2Ln2 complexes with carbonate bridges formed by the fixation of carbon dioxide in the atmosphere: single-molecule magnet behaviour and magnetocaloric effect. Dalton Trans 2020; 49:2121-2128. [DOI: 10.1039/c9dt04480a] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
In the self-assembly process, CO2 in the air is automatically fixed to Zn2Ln2 cluster molecular materials.
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Affiliation(s)
- Cai-Ming Liu
- Beijing National Laboratory for Molecular Sciences
- Center for Molecular Science
- Key Laboratory of Organic Solids
- Institute of Chemistry
- Chinese Academy of Sciences
| | - De-Qing Zhang
- Beijing National Laboratory for Molecular Sciences
- Center for Molecular Science
- Key Laboratory of Organic Solids
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Xiang Hao
- Beijing National Laboratory for Molecular Sciences
- Center for Molecular Science
- Key Laboratory of Organic Solids
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Dao-Ben Zhu
- Beijing National Laboratory for Molecular Sciences
- Center for Molecular Science
- Key Laboratory of Organic Solids
- Institute of Chemistry
- Chinese Academy of Sciences
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24
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Azmi NI, Zhan SZ, Li JH, Razali MR. Metal complexes based on substituted aliphatic acid derived from a Diels-Alder adduct: Synthesis and potential ratiometric luminescent temperature sensor of d10 complex. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.119167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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25
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Huang XD, Jia JG, Kurmoo M, Bao SS, Zheng LM. Interplay of anthracene luminescence and dysprosium magnetism by steric control of photodimerization. Dalton Trans 2019; 48:13769-13779. [PMID: 31482159 DOI: 10.1039/c9dt02854d] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Systematic control of the intermolecular pair-wise [4 + 4] photocycloaddition of a series of dysprosium phosphonates through fine-tuning of two different phosphonate ligands, one with a bidentate blocker and one with an anthracene antenna, both with alkyl substituents, reveals a size dependent rate. With bulky isopropyl on the diphosphonate blocker little response to UV light is observed. In contrast, compounds with ethyl which has less steric hindrance exhibit almost complete photocycloaddition. Interestingly, the alkyl substituents attached to anthracene monophosphonate have no evident effect on the reaction rate. Although no direct relationship can be found between the substitutions and the observed differences in field-induced single molecule magnetism, remarkable changes in magnetic dynamics are observed for complexes before and after the complete photocycloaddition reactions.
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Affiliation(s)
- Xin-Da Huang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing 210023, P. R. China.
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26
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Petrosyants SP, Babeshkin KA, Gavrikov AV, Ilyukhin AB, Belova EV, Efimov NN. Towards comparative investigation of Er- and Yb-based SMMs: the effect of the coordination environment configuration on the magnetic relaxation in the series of heteroleptic thiocyanate complexes. Dalton Trans 2019; 48:12644-12655. [PMID: 31384881 DOI: 10.1039/c9dt02260k] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We prepared and studied two similar series of Er and Yb thiocyanates, involving [Ln(H2O)5(NCS)3]·H2O (1Er, 1Yb) as well as the molecular and ionic complexes with 2,2'-bipyridine (bpy) and 1,10-phenantroline (phen), [Ln(H2O)(bpy)2(NCS)3]·0.5(bpy)·H2O (2Er, 2Yb), [Ln(H2O)(phen)2(NCS)3]·phen·0.5H2O (3Er, 3Yb), [Hbpy][Ln(bpy)2(NCS)4]·H2O (4Er, 4Yb) and [Hphen][Ln(phen)2(NCS)4] (5Er, 5Yb). All the complexes were found to exhibit the properties of field-induced single-molecule magnets. For 1Yb, the effective value of the energy barrier for magnetization reversal, Δeff/kB, equals to 50 K, which is among the highest ones currently known for molecular SMMs based on Yb3+. The obtained data are discussed involving essential structural features of the complexes, namely the configuration of the Ln environment, i.e. its composition and geometry as well as mutual distribution of different donating centers. To the best of our knowledge, this work also involves experimental investigation of the largest and thus sufficiently representative series of similar mononuclear SMMs based on Er and Yb within one study.
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Affiliation(s)
- Svetlana P Petrosyants
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, 119991 Moscow, Russian Federation.
| | - Konstantin A Babeshkin
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, 119991 Moscow, Russian Federation.
| | - Andrey V Gavrikov
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, 119991 Moscow, Russian Federation.
| | - Andrey B Ilyukhin
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, 119991 Moscow, Russian Federation.
| | - Ekaterina V Belova
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, 119991 Moscow, Russian Federation. and Lomonosov Moscow State University, Department of Chemistry, GSP-1, Leninskie Gory 1/3, Moscow, 119991, Russian Federation
| | - Nikolay N Efimov
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, 119991 Moscow, Russian Federation.
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27
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Biswas S, Mandal L, Shen Y, Yamashita M. Exploration of SMM behavior of Ln2 complexes derived from thianaphthene-2-carboxylic acid. Dalton Trans 2019; 48:14096-14102. [DOI: 10.1039/c9dt01984g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Observations were made of field-induced SMM property of a dysprosium-based dinuclear complex derived from thianaphthene-2-carboxylic acid ligand.
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Affiliation(s)
- Soumava Biswas
- WPI Research Center
- Advanced Institute for Materials Research
- Tohoku University
- Sendai 980-8577
- Japan
| | - Leena Mandal
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Yongbing Shen
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Masahiro Yamashita
- WPI Research Center
- Advanced Institute for Materials Research
- Tohoku University
- Sendai 980-8577
- Japan
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