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Guo X, Zhang L, Hu J, Szilágyi B, Yu M, Chen S, Tircsó G, Zhou X, Tao J. Improving the potential of paraCEST through magnetic-coupling induced line sharpening. Chem Sci 2023; 14:14157-14165. [PMID: 38098703 PMCID: PMC10717539 DOI: 10.1039/d3sc04770a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Accepted: 11/17/2023] [Indexed: 12/17/2023] Open
Abstract
Magnetic coupling between paramagnetic centers is a crucial phenomenon in the design of efficient MRI contrast agents. In this study, we investigate the paraCEST properties and magnetic coupling effects of a novel homodinuclear Ni(ii) complex, 1, containing a Robson type macrocyclic ligand. A thorough analysis of the complex's electronic and magnetic properties revealed that the magnetic coupling effect reduces the transverse relaxation rate and enhances the sharpness of the proton resonances, leading to enhanced CEST efficiency. This novel mechanism, which we coined "magnetic-coupling induced line sharpening" (MILS), can be crucial for optimizing the performance of paramagnetic metal complexes in paraCEST imaging. Moreover, magnetic coupling plays a critical role in the relaxation properties of homodinuclear complexes. Our study not only paves the way for the creation of advanced paraCEST agents with enhanced CEST capabilities and sensitivity but also provides valuable guidance for the design of other MRI contrast agents utilizing dinuclear metal complexes.
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Affiliation(s)
- Xin Guo
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology Beijing 102488 China
| | - Lei Zhang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan National Laboratory for Optoelectronics Wuhan 430071 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Jiesheng Hu
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology Beijing 102488 China
| | - Balázs Szilágyi
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen Egyetem tér 1 H-4032 Debrecen Hungary
- Doctoral School of Chemistry, University of Debrecen Egyetem tér 1 H-4032 Debrecen Hungary
| | - Meng Yu
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology Beijing 102488 China
| | - Shizhen Chen
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan National Laboratory for Optoelectronics Wuhan 430071 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Gyula Tircsó
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen Egyetem tér 1 H-4032 Debrecen Hungary
| | - Xin Zhou
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan National Laboratory for Optoelectronics Wuhan 430071 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Jun Tao
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology Beijing 102488 China
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Structures of Dimer-of-Dimers Type Defect Cubane Tetranuclear Copper(II) Complexes with Novel Dinucleating Ligands. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27020576. [PMID: 35056892 PMCID: PMC8780986 DOI: 10.3390/molecules27020576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 01/14/2022] [Accepted: 01/14/2022] [Indexed: 11/17/2022]
Abstract
Only a limited number of multinucleating ligands can stably maintain multinuclear metal structures in aqueous solutions. In this study, a water-soluble dinucleating ligand, 2,6-bis{[N-(carboxylatomethyl)-N-methyl-amino]methyl}-4-methylphenolate ((sym-cmp)3−), was prepared and its copper(II) complexes were structurally characterized. Using the single-crystal X-ray diffraction method, their dimer-of-dimers type defect cubane tetranuclear copper(II) structures were characterized for [Cu4(sym-cmp)2Cl2(H2O)2] and [Cu4(sym-cmp)2(CH3O)2(CH3OH)2]. In the complexes, each copper(II) ion has a five-coordinate square-pyramidal coordination geometry. The coordination bond character was confirmed by the density functional theory (DFT) calculation on the basis of the crystal structure, whereby we found the bonding and anti-bonding molecular orbitals. From the cryomagnetic measurement and the magnetic analysis, overall antiferromagnetic interaction was observed, and this magnetic behavior is also explained by the DFT result. Judging from the molar conductance and the electronic spectra, the bridging chlorido ligand dissociates in water, but the dinuclear copper(II) structure was found to be maintained in an aqueous solution. In conclusion, the tetranuclear copper(II) structures were crystallographically characterized, and the dinuclear copper(II) structures were found to be stabilized even in an aqueous solution.
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Torić F, Pavlović G, Pajić D, Cindrić M, Zadro K. Tetranuclear Ni4 cubane complexes with high χT maxima: magneto-structural analysis. CrystEngComm 2018. [DOI: 10.1039/c8ce00566d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Seven tetranuclear Ni(ii) cubane complexes with unexpectedly high χT maxima coming from the ZFS contribution and with an interesting magneto-structural correlation.
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Affiliation(s)
- Filip Torić
- Department of Physics
- Faculty of Science
- University of Zagreb
- Croatia
| | | | - Damir Pajić
- Department of Physics
- Faculty of Science
- University of Zagreb
- Croatia
| | - Marina Cindrić
- Department of Chemistry
- Faculty of Science
- University of Zagreb
- Croatia
| | - Krešo Zadro
- Department of Physics
- Faculty of Science
- University of Zagreb
- Croatia
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Sakiyama H, Chiba Y, Tone K, Yamasaki M, Mikuriya M, Krzystek J, Ozarowski A. Magnetic Properties of a Dinuclear Nickel(II) Complex with 2,6-Bis[(2-hydroxyethyl)methylaminomethyl]-4-methylphenolate. Inorg Chem 2017; 56:138-146. [PMID: 27976888 DOI: 10.1021/acs.inorgchem.6b01671] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Magnetic properties of dinuclear nickel(II) complex [Ni2(sym-hmp)2](BPh4)2·3.5DMF·0.5(2-PrOH) (1), where (sym-hmp)- is 2,6-bis[(2-hydroxyethyl)methylaminomethyl]-4-methylphenolate anion and DMF indicates dimethylformamide, were investigated using high-frequency and -field electron paramagnetic resonance (HFEPR). To magnetically characterize the mononuclear nickel(II) species forming the dimer, its two dinuclear zinc(II) analogues, [Zn2(sym-hmp)2](BPh4)2·3.5DMF·0.5(2-PrOH) (2) and [Zn2(sym-hmp)2](BPh4)2·2acetone·2H2O (2'), were prepared. One of them (2') was structurally characterized by X-ray diffractometry and doped with 5% mol nickel(II) ions to prepare a mixed crystal 3. From the HFEPR results on complex 1 obtained at 40 K, the spin Hamiltonian parameters of the first excited spin state (S = 1) of the dimer were accurately determined as |D1| = 9.99(2) cm-1, |E1| = 1.62(1) cm-1, and g1 = [2.25(1), 2.19(2), 2.27(2)], and for the second excited spin state (S = 2) at 150 K estimated as |D2| ≈ 3.5 cm-1. From these numbers, the single-ion zero-field splitting (ZFS) parameter of the Ni(II) ions forming the dimer was estimated as |DNi| ≈ 10-10.5 cm-1. The HFEPR spectra of 3 yielded directly the single-ion parameters for DNi = +10.1 cm-1, |ENi| = 3.1 cm-1, and giso = 2.2. On the basis of the HFEPR results, the previously obtained magnetic data (Sakiyama, H.; Tone, K.; Yamasaki, M.; Mikuriya, M. Inorg. Chim. Acta 2011, 365, 183) were reanalyzed, and the isotropic interaction parameter between the Ni(II) ions was determined as J = -70 cm-1 (Hex = -J SA·SB). Finally, density functional theory calculations yielded the J value of -90 cm-1 in a qualitative agreement with the experiment.
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Affiliation(s)
- Hiroshi Sakiyama
- Department of Material and Biological Chemistry, Faculty of Science, Yamagata University , 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
| | - Yukako Chiba
- Department of Material and Biological Chemistry, Faculty of Science, Yamagata University , 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
| | - Katsuya Tone
- Department of Material and Biological Chemistry, Faculty of Science, Yamagata University , 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
| | - Mikio Yamasaki
- X-ray Research Laboratory, Rigaku Corporation , Matsubara 3-9-12, Akishima, Tokyo 196-8666, Japan
| | - Masahiro Mikuriya
- Department of Applied Chemistry for Environment and Research Center for Coordination Molecule-based Devices, School of Science and Technology, Kwansei Gakuin University , Gakuen 2-1, Sanda 669-1337, Japan
| | - J Krzystek
- National High Magnetic Field Laboratory, Florida State University , Tallahassee, Florida 32310, United States
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory, Florida State University , Tallahassee, Florida 32310, United States
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LIM J, SHIN Y, RYU S, MITSUHASHI R, OMOTE M, SAKIYAMA H, MIKURIYA M. Ferromagnetic Dinuclear Nickel(II) Complex with a Schiff-base Having a Di-μ-phenolato-μ-methanol-bridged Core. X-RAY STRUCTURE ANALYSIS ONLINE 2017. [DOI: 10.2116/xraystruct.33.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
| | | | - Sanghoon RYU
- Center for Scientific Instrument, Andong National University
| | - Ryoji MITSUHASHI
- Department of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University
| | - Masataka OMOTE
- Department of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University
| | - Hiroshi SAKIYAMA
- Department of Material and Biological Chemistry, Faculty of Science, Yamagata University
| | - Masahiro MIKURIYA
- Department of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University
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Archana V, Imamura Y, Sakiyama H, Hada M. Correlating Magnetic Exchange in Dinuclear Bis(phenolate)-Bridged Complexes: A Computational Perspective. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2016. [DOI: 10.1246/bcsj.20160077] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Velloth Archana
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University
| | - Yutaka Imamura
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University
| | - Hiroshi Sakiyama
- Department of Material and Biological Chemistry, Faculty of Science, Yamagata University
| | - Masahiko Hada
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University
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Synthesis and magnetic properties of a dinuclear manganese(II) complex with two manganese(II) ions of C2-twisted octahedral geometry. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.03.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Mikuriya M, Hamagawa M, Tomioka N, Fujimori R, Yoshioka D, Hori S, Kuriyama T, Sakiyama H, Handa M, Mitsuhashi R. Nickel(II) complex with 1,4,7-tris(2-aminoethyl)-1,4,7-triazacyclononane‡. CHEMICAL PAPERS 2016. [DOI: 10.1515/chempap-2015-0165] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A nickel(II) complex, [Ni(taetacn)](ClO
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Ghorai P, Chakraborty A, Panja A, Mondal TK, Saha A. Mono- and di-nuclear nickel(ii) complexes derived from NNO donor ligands: syntheses, crystal structures and magnetic studies of dinuclear analogues. RSC Adv 2016. [DOI: 10.1039/c6ra02982e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ferromagnetic interaction in dinickel(ii) complexes, supported by DFT calculations, is reported. Bis(phenoxo)-bridged compound is only the second example of ferromagnetically coupled system.
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Affiliation(s)
- Pravat Ghorai
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
| | - Anindita Chakraborty
- Molecular Materials Lab
- Chemistry and Physics of Materials Unit
- Jawaharlal Nehru Centre for Advanced Scientific Research
- Banglore-560064
- India
| | | | | | - Amrita Saha
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
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Mikuriya M, Schumacher M, Kawano C, Akihara T, Ono K, Yoshioka D, Sakiyama H, Handa M. Dinuclear Nickel(II) Pivalate with Μ-Aqua and Di-Μ-Pivalato Bridges Showing a Ferromagnetic Interaction. CHEMISTRY JOURNAL OF MOLDOVA 2014. [DOI: 10.19261/cjm.2014.09(2).09] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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11
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Liu YY, Liu J, Yang J, Liu B, Ma JF. Eight coordination compounds based on a reduced Schiff base tetraaminodiphenol macrocyclic ligand. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2013.03.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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12
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Dieng M, Diouf O, Gaye M, Sall AS, Pérez-Lourido P, Valencia L, Caneschi A, Sorace L. Polynuclear nickel(II) complexes with salicylaldimine derivative ligands. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2012.09.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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