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Manvell AS, Pfleger R, Bonde NA, Briganti M, Mattei CA, Nannestad TB, Weihe H, Powell AK, Ollivier J, Bendix J, Perfetti M. LnDOTA puppeteering: removing the water molecule and imposing tetragonal symmetry. Chem Sci 2023; 15:113-123. [PMID: 38131074 PMCID: PMC10732010 DOI: 10.1039/d3sc03928e] [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: 07/29/2023] [Accepted: 10/25/2023] [Indexed: 12/23/2023] Open
Abstract
Complexes of lanthanide(iii) ions (Ln) with tetraazacyclododecane-N,N',N'',N'''-tetraacetate (DOTA) are a benchmark in the field of magnetism due to their well-investigated and sometimes surprising features. Ab initio calculations suggest that the ninth ligand, an axial water molecule, is key in defining the magnetic properties because it breaks the potential C4 symmetry of the resulting complexes. In this paper, we experimentally isolate the role of the water molecule by excluding it from the metal coordination sphere without altering the chemical structure of the ligand. Our complexes are therefore designed to be geometrically tetragonal and strict crystallographic symmetry is achieved by exploiting a combination of solution ionic strength and solid state packing effects. A thorough multitechnique approach has been used to unravel the electronic structure and magnetic anisotropy of the complexes. Moreover, the geometry enhancement allows us to predict, using only one angle obtained from the crystal structure, the ground state composition of all the studied derivatives (Ln = Tb to Yb). Therefore, these systems also provide an excellent platform to test the validity and limitations of the ab initio methods. Our combined experimental and theoretical investigation proves that the water molecule is indeed key in defining the magnetic anisotropy and the slow relaxation of these complexes.
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Affiliation(s)
- Anna Schannong Manvell
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Rouven Pfleger
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology Engesserstrasse 15 76131 Karlsruhe Germany
| | - Niels Andreas Bonde
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
- Institut Laue-Langevin 71 avenue des Martyrs, CS 20156 38042 Grenoble Cedex 9 France
| | - Matteo Briganti
- Department of Chemistry U. Schiff Via della Lastruccia 3 50019 Sesto Fiorentino Italy
| | - Carlo Andrea Mattei
- Department of Chemistry U. Schiff Via della Lastruccia 3 50019 Sesto Fiorentino Italy
| | - Theis Brock Nannestad
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Høgni Weihe
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Annie K Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology Engesserstrasse 15 76131 Karlsruhe Germany
| | - Jacques Ollivier
- Institut Laue-Langevin 71 avenue des Martyrs, CS 20156 38042 Grenoble Cedex 9 France
| | - Jesper Bendix
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Mauro Perfetti
- Department of Chemistry U. Schiff Via della Lastruccia 3 50019 Sesto Fiorentino Italy
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2
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Xu W, Ye X, Wu M, Jiang X, Hugo Tse LH, Gu Y, Shu K, Xu L, Jian Y, Mo G, Xu J, Ding Y, Gao R, Shen J, Ye F, Yan Z, Dai L. Chiral Gd-DOTA as a Versatile Platform for Hepatobiliary and Tumor Targeting MRI Contrast Agents. J Med Chem 2023; 66:14669-14682. [PMID: 37855413 DOI: 10.1021/acs.jmedchem.3c01183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2023]
Abstract
The leakage of gadolinium ions (Gd3+) from commercial Gd3+-based contrast agents (GBCAs) in patients is currently the major safety concern in clinical magnetic resonance imaging (MRI) scans, and the lack of task-specific GBCAs limits its usage in the early detection of disease and imaging of specific biological regions. Herein, ultrastable GBCAs were constructed via decorating chiral Gd-DOTA with a phenylic analogue to one of the pendent arms, and the stability constant was determined as high as 27.08, accompanied by negligible decomplexation in 1 M of HCl over 2 years. A hepatic-specific chiral Gd-DOTA was screened out as a potential alternative to commercial Gd-EOB-DTPA, while combination with functional molecules favored chiral Gd-DOTA as tumor targeting probes. Therefore, the novel chiral Gd-DOTA is believed to be an ideal platform for designing the next generation of GBCAs for various clinical purposes due to its outstanding inert nature.
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Affiliation(s)
- Weiyuan Xu
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325000, China
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou, Zhejiang 325000, China
| | - Xinjian Ye
- Department of Radiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Min Wu
- Department of Radiology and Huaxi MR Research Center (HMRRC), Functional and Molecular Imaging Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Xin Jiang
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325000, China
| | - Lik Hang Hugo Tse
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, Guangdong 518057, China
| | - Yanjuan Gu
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, Guangdong 518057, China
| | - Kun Shu
- Department of Radiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Liuhui Xu
- Joint Centre of Translational Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Yong Jian
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325000, China
| | - Gengshen Mo
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325000, China
| | - Jiao Xu
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325000, China
| | - Yinghui Ding
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325000, China
| | - Ruonan Gao
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325000, China
| | - Jianliang Shen
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325000, China
| | - Fangfu Ye
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325000, China
- Joint Centre of Translational Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou, Zhejiang 325000, China
| | - Zhihan Yan
- Department of Radiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Lixiong Dai
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325000, China
- Joint Centre of Translational Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
- Zhejiang Engineering Research Center for Innovation and Application of Intelligent Radiotherapy Technology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, China
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3
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Schnable D, Freedman K, Ayers KM, Schley ND, Kol M, Ung G. Synthesis of Enantiopure Lanthanide Complexes Supported by Hexadentate N, N'-Bis(methylbipyridyl)bipyrrolidine and Their Circularly Polarized Luminescence. Inorg Chem 2020; 59:8498-8504. [PMID: 32469213 DOI: 10.1021/acs.inorgchem.0c00946] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the synthesis of lanthanide complexes supported by enantiopure N,N'-bis(methylbipyridyl)bipyrrolidine and subsequent characterization through luminescence studies. Complexes of this ligand with the visibly emissive lanthanides Sm, Eu, Tb, and Dy are luminescent (ϕf of ≤0.32) and demonstrate strong preferential emission of circularly polarized light in all four cases (|glum| of ≤0.26). Notably, all four possess at least one transition with a |glum| of >0.2, and the strongest preferential emission is measured from the complexes of Sm and Dy.
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Affiliation(s)
- David Schnable
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Kelila Freedman
- The School of Chemistry, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel
| | - Kaitlynn M Ayers
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Nathan D Schley
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Moshe Kol
- The School of Chemistry, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel
| | - Gaël Ung
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
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4
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Clough TJ, Jiang L, Wong KL, Long NJ. Ligand design strategies to increase stability of gadolinium-based magnetic resonance imaging contrast agents. Nat Commun 2019; 10:1420. [PMID: 30926784 PMCID: PMC6441101 DOI: 10.1038/s41467-019-09342-3] [Citation(s) in RCA: 167] [Impact Index Per Article: 33.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 12/20/2018] [Indexed: 01/08/2023] Open
Abstract
Gadolinium(III) complexes have been widely utilised as magnetic resonance imaging (MRI) contrast agents for decades. In recent years however, concerns have developed about their toxicity, believed to derive from demetallation of the complexes in vivo, and the relatively large quantities of compound required for a successful scan. Recent efforts have sought to enhance the relaxivity of trivalent gadolinium complexes without sacrificing their stability. This review aims to examine the strategic design of ligands synthesised for this purpose, provide an overview of recent successes in gadolinium-based contrast agent development and assess the requirements for clinical translation.
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Affiliation(s)
- Thomas J Clough
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London, W12 0BZ, UK
| | - Lijun Jiang
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London, W12 0BZ, UK
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR, China
| | - Ka-Leung Wong
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR, China.
| | - Nicholas J Long
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London, W12 0BZ, UK.
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5
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Nonat A, Liu T, Jeannin O, Camerel F, Charbonnière LJ. Energy Transfer in Supramolecular Heteronuclear Lanthanide Dimers and Application to Fluoride Sensing in Water. Chemistry 2018; 24:3784-3792. [PMID: 29322568 DOI: 10.1002/chem.201705532] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Indexed: 11/09/2022]
Abstract
In the presence of fluoride anions, [LnL(H2 O)]+ complexes, based on the coordination of a lanthanide (Ln) cation into the cavity of a C2v symmetrical cyclen-based ligand (L), self-assemble in water to form [(LnL)2 F]+ dimers. The crystal structures of the Yb hydrated monomer and of the fluorinated dimer are reported and analyzed to unravel the impact of the cumulative effect of weak hydrogen bonding and aromatic stacking interactions in the supramolecular assembly. The assembly is stable over a broad range of pH 3-8. A combination of equimolar amounts of Eu and Tb complexes led to a quasistatistical mixture of homo- and heterodimers, as observed by using electrospray mass spectrometry. In the heterodimers, selective excitation into the 7 F6 →5 D4 absorption band of the Tb center at λ=488 nm allowed the observation of a Tb-to-Eu downshifting energy transfer, not observed in the absence of fluoride ions. Analysis of the excited-state lifetimes of the dimers within the frame of the Förster theory of energy transfer showed the transfer to have an efficiency of 34 %, with a corresponding Förster radius of 4.1 Å; thereby, unraveling the short Ln-Ln distance as a crucial parameter of the energy-transfer process. By using equimolar mixtures of the Tb and Eu complexes, the energy-transfer phenomenon was used for a ratiometric sensing of fluoride anions in water with a detection limit of 17.7 nm.
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Affiliation(s)
- Aline Nonat
- Laboratoire d'Ingénierie Moléculaire Appliquée à l'Analyse, IPHC, UMR 7178 CNRS, Université de Strasbourg, ECPM, Bât R1N0, 25 Rue Becquerel, 67087, Strasbourg Cedex, France
| | - Tao Liu
- Laboratoire d'Ingénierie Moléculaire Appliquée à l'Analyse, IPHC, UMR 7178 CNRS, Université de Strasbourg, ECPM, Bât R1N0, 25 Rue Becquerel, 67087, Strasbourg Cedex, France
| | - Olivier Jeannin
- Laboratoire Matière Condensée et Systèmes Électroactifs, Institut des Sciences Chimiques de Rennes, UMR-CNRS 6226, 263 Avenue du Général Leclerc, CS 74205, F-35042, Rennes Cedex, France
| | - Franck Camerel
- Laboratoire Matière Condensée et Systèmes Électroactifs, Institut des Sciences Chimiques de Rennes, UMR-CNRS 6226, 263 Avenue du Général Leclerc, CS 74205, F-35042, Rennes Cedex, France
| | - Loïc J Charbonnière
- Laboratoire d'Ingénierie Moléculaire Appliquée à l'Analyse, IPHC, UMR 7178 CNRS, Université de Strasbourg, ECPM, Bât R1N0, 25 Rue Becquerel, 67087, Strasbourg Cedex, France
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6
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Nielsen LG, Junker AKR, Sørensen TJ. Composed in the f-block: solution structure and function of kinetically inert lanthanide(iii) complexes. Dalton Trans 2018; 47:10360-10376. [DOI: 10.1039/c8dt01501e] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An induction to the wonders of lanthanides, and a call for standardised methods for characterisation of lanthanide complexes in solution.
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Affiliation(s)
- Lea Gundorff Nielsen
- Nano-Science Center & Department of Chemistry
- University of Copenhagen
- 2100 København Ø
- Denmark
| | - Anne Kathrine R. Junker
- Nano-Science Center & Department of Chemistry
- University of Copenhagen
- 2100 København Ø
- Denmark
| | - Thomas Just Sørensen
- Nano-Science Center & Department of Chemistry
- University of Copenhagen
- 2100 København Ø
- Denmark
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7
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Srivastava K, Weitz EA, Peterson KL, Marjańska M, Pierre VC. Fe- and Ln-DOTAm-F12 Are Effective Paramagnetic Fluorine Contrast Agents for MRI in Water and Blood. Inorg Chem 2017; 56:1546-1557. [PMID: 28094930 DOI: 10.1021/acs.inorgchem.6b02631] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A series of fluorinated macrocyclic complexes, M-DOTAm-F12, where M is LaIII, EuIII, GdIII, TbIII, DyIII, HoIII, ErIII, TmIII, YbIII, and FeII, was synthesized, and their potential as fluorine magnetic resonance imaging (MRI) contrast agents was evaluated. The high water solubility of these complexes and the presence of a single fluorine NMR signal, two necessary parameters for in vivo MRI, are substantial advantages over currently used organic polyfluorocarbons and other reported paramagnetic 19F probes. Importantly, the sensitivity of the paramagnetic probes on a per fluorine basis is at least 1 order of magnitude higher than that of diamagnetic organic probes. This increased sensitivity is due to a substantial-up to 100-fold-decrease in the longitudinal relaxation time (T1) of the fluorine nuclei. The shorter T1 allows for a greater number of scans to be obtained in an equivalent time frame. The sensitivity of the fluorine probes is proportional to the T2/T1 ratio. In water, the optimal metal complexes for imaging applications are those containing HoIII and FeII, and to a lesser extent TmIII and YbIII. Whereas T1 of the lanthanide complexes are little affected by blood, the T2 are notably shorter in blood than in water. The sensitivity of Ln-DOTAm-F12 complexes is lower in blood than in water, such that the most sensitive complex in water, HoIII-DOTAm-F12, could not be detected in blood. TmIII yielded the most sensitive lanthanide fluorine probe in blood. Notably, the relaxation times of the fluorine nuclei of FeII-DOTAm-F12 are similar in water and in blood. That complex has the highest T2/T1 ratio (0.57) and the lowest limit of detection (300 μM) in blood. The combination of high water solubility, single fluorine signal, and high T2/T1 of M-DOTAm-F12 facilitates the acquisition of three-dimensional magnetic resonance images.
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Affiliation(s)
- Kriti Srivastava
- Department of Chemistry and ‡Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Evan A Weitz
- Department of Chemistry and ‡Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Katie L Peterson
- Department of Chemistry and ‡Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Małgorzata Marjańska
- Department of Chemistry and ‡Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Valérie C Pierre
- Department of Chemistry and ‡Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota , Minneapolis, Minnesota 55455, United States
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8
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Yang F, Wang X, Pan BB, Su XC. Single-armed phenylsulfonated pyridine derivative of DOTA is rigid and stable paramagnetic tag in protein analysis. Chem Commun (Camb) 2016; 52:11535-11538. [DOI: 10.1039/c6cc06114a] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Single-armed DOTA-like phenylsulfonated pyridine derivatives are rigid and stable paramagnetic tags for site-specific labelling of proteins. The respective protein conjugates yield valuable long-range structural restraints for proteins.
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Affiliation(s)
- Feng Yang
- State Key Laboratory of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
- China
| | - Xiao Wang
- State Key Laboratory of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
- China
| | - Bin-Bin Pan
- State Key Laboratory of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
- China
| | - Xun-Cheng Su
- State Key Laboratory of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
- China
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9
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Berardozzi R, Di Bari L. Optical Activity in the Near-IR Region: Theλ=980 nm Multiplet of Chiral Yb3+Complexes. Chemphyschem 2015. [DOI: 10.1002/cphc.201500355] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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10
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Zinna F, Di Bari L. Lanthanide Circularly Polarized Luminescence: Bases and Applications. Chirality 2014; 27:1-13. [DOI: 10.1002/chir.22382] [Citation(s) in RCA: 351] [Impact Index Per Article: 35.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Accepted: 08/04/2014] [Indexed: 12/21/2022]
Affiliation(s)
- Francesco Zinna
- Dipartimento di Chimica e Chimica Industriale; Università di Pisa; Pisa Italy
| | - Lorenzo Di Bari
- Dipartimento di Chimica e Chimica Industriale; Università di Pisa; Pisa Italy
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11
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Ito H, Shinoda S. Chirality Sensing and Size Discrimination of Anions by Macrotricyclic Cyclen-Disodium Complexes. ChemistryOpen 2014. [PMCID: PMC4280822 DOI: 10.1002/open.201402049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Affiliation(s)
- Hiroshi Ito
- Department of Chemistry, Osaka City University and JST, CRESTSugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan) E-mail:
| | - Satoshi Shinoda
- Department of Chemistry, Osaka City University and JST, CRESTSugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan) E-mail:
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12
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Liu T, Nonat A, Beyler M, Regueiro-Figueroa M, Nchimi Nono K, Jeannin O, Camerel F, Debaene F, Cianférani-Sanglier S, Tripier R, Platas-Iglesias C, Charbonnière LJ. Supramolecular luminescent lanthanide dimers for fluoride sequestering and sensing. Angew Chem Int Ed Engl 2014; 53:7259-63. [PMID: 24909695 DOI: 10.1002/anie.201404847] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Indexed: 01/05/2023]
Abstract
Lanthanide complexes (Ln=Eu, Tb, and Yb) that are based on a C2 -symmetric cyclen scaffold were prepared and characterized. The addition of fluoride anions to aqueous solutions of the complexes resulted in the formation of dinuclear supramolecular compounds in which the anion is confined into the cavity that is formed by the two complexes. The supramolecular assembly process was monitored by UV/Vis absorption, luminescence, and NMR spectroscopy and high-resolution mass spectrometry. The X-ray crystal structure of the europium dimer revealed that the architecture of the scaffold is stabilized by synergistic effects of the EuFEu bridging motive, π stacking interactions, and a four-component hydrogen-bonding network, which control the assembly of the two [EuL] entities around the fluoride ion. The strong association in water allowed for the luminescence sensing of fluoride down to a detection limit of 24 nM.
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Affiliation(s)
- Tao Liu
- LIMAA, IPHC, UMR 7178 CNRS, Université de Strasbourg, ECPM, 25 rue Becquerel, 67087 Strasbourg Cedex (France)
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13
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Liu T, Nonat A, Beyler M, Regueiro‐Figueroa M, Nchimi Nono K, Jeannin O, Camerel F, Debaene F, Cianférani‐Sanglier S, Tripier R, Platas‐Iglesias C, Charbonnière LJ. Supramolecular Luminescent Lanthanide Dimers for Fluoride Sequestering and Sensing. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201404847] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Tao Liu
- LIMAA, IPHC, UMR 7178 CNRS, Université de Strasbourg, ECPM, 25 rue Becquerel, 67087 Strasbourg Cedex (France)
| | - Aline Nonat
- LIMAA, IPHC, UMR 7178 CNRS, Université de Strasbourg, ECPM, 25 rue Becquerel, 67087 Strasbourg Cedex (France)
| | - Maryline Beyler
- Université de Bretagne Occidentale, UMR‐CNRS 6521/IFR148 ScInBioS, 6 avenue Victor le Gorgeu, C.S. 93837, 29238 Brest Cedex 3 (France)
| | - Martín Regueiro‐Figueroa
- Departamento de Química Fundamental, Universidade da Coruña, Alejandro de la Sota 1, 15008A Coruña (Spain)
| | - Katia Nchimi Nono
- LIMAA, IPHC, UMR 7178 CNRS, Université de Strasbourg, ECPM, 25 rue Becquerel, 67087 Strasbourg Cedex (France)
| | - Olivier Jeannin
- MaCSE, Institut des Sciences Chimiques de Rennes (ISCR), UMR‐CNRS 6226, 263 Avenue du Général Leclerc, CS 74205, 35042 Rennes Cedex (France)
| | - Franck Camerel
- MaCSE, Institut des Sciences Chimiques de Rennes (ISCR), UMR‐CNRS 6226, 263 Avenue du Général Leclerc, CS 74205, 35042 Rennes Cedex (France)
| | - François Debaene
- LSMBO, IPHC, UMR 7178 CNRS‐Université de Strasbourg, ECPM, 25 rue Becquerel, 67087 Strasbourg (France)
| | - Sarah Cianférani‐Sanglier
- LSMBO, IPHC, UMR 7178 CNRS‐Université de Strasbourg, ECPM, 25 rue Becquerel, 67087 Strasbourg (France)
| | - Raphaël Tripier
- Université de Bretagne Occidentale, UMR‐CNRS 6521/IFR148 ScInBioS, 6 avenue Victor le Gorgeu, C.S. 93837, 29238 Brest Cedex 3 (France)
| | - Carlos Platas‐Iglesias
- Departamento de Química Fundamental, Universidade da Coruña, Alejandro de la Sota 1, 15008A Coruña (Spain)
| | - Loïc J. Charbonnière
- LIMAA, IPHC, UMR 7178 CNRS, Université de Strasbourg, ECPM, 25 rue Becquerel, 67087 Strasbourg Cedex (France)
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14
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Di Pietro S, Di Bari L. The structure of MLn(hfbc)4 and a key to high circularly polarized luminescence. Inorg Chem 2012; 51:12007-14. [PMID: 23094785 DOI: 10.1021/ic3018979] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The heterobimetallic complex CsEu[(+)-hfbc](4) (hfbc = 3-heptafluorobutyryl camphorate), prepared by Kaizaki and co-workers, displays the highest ratio of polarization versus total luminescence (measured by the g(lum) factor), i.e., ~85% of the emitted photons at 595 nm are left-circularly polarized. We present a detailed structural analysis in solution, based on paramagnetic nuclear magnetic resonance (NMR), and discuss the possible dynamic processes, where its analogues are involved. We demonstrate that the first coordination sphere is very close to the achiral regular square antiprism (SAPR) with D(4d) symmetry, which rules out the intrinsic dissymmetry of the Eu environment for rationalizing the g(lum). In contrast, the dynamic coupling between the f-f transitions, responsible for the emission, to the ligand-centered π-π* transition at 310 nm displays almost ideal geometry to justify g(lum) and discloses a key to high circularly polarized emission.
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Affiliation(s)
- Sebastiano Di Pietro
- Dipartimento di Chimica e Chimica Industriale, Via Risorgimento 35, 56126 Pisa, Italy
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Ito H, Tsukube H, Shinoda S. A chirality rewriting cycle mediated by a dynamic cyclen–calcium complex. Chem Commun (Camb) 2012; 48:10954-6. [DOI: 10.1039/c2cc35350d] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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