1
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Egger C, Guénée L, Deorukhkar N, Piguet C. Programming heterometallic 4f-4f' helicates under thermodynamic control: the circle is complete. Dalton Trans 2024; 53:6050-6062. [PMID: 38470853 DOI: 10.1039/d4dt00610k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
Three non-symmetrical segmental ligand strands L4 can be wrapped around a linear sequence of one Zn2+ and two trivalent lanthanide cations Ln3+ to give quantitatively directional [ZnLn2(L4)3]8+ triple-stranded helicates in the solid state and in solution. NMR speciations in CD3CN show negligible decomplexation at a millimolar concentration and the latter helicate can be thus safely considered as a preorganized C3-symmetrical HHH-[(L43Zn)(LnA)(2-n)(LnB)n]8+ platform in which the thermodynamic properties of (i) lanthanide permutation between the central N9 and the terminal N6O3 binding sites and (ii) exchange processes between homo- and heterolanthanide helicates are easy to access (Ln = La, Eu, Lu). Deviations from statistical distributions could be programmed by exploiting specific site recognition and intermetallic pair interactions. Considering the challenging La3+ : Eu3+ ionic pair, for which the sizes of the two cations differ by only 8%, a remarkable excess (70%) of the heterolanthanide is produced, together with a preference for the formation of the isomer where the largest lanthanum cation lies in the central N9 site ([(La)(Eu)] : [(Eu)(La)] = 9 : 1). This rare design and its rational programming pave the way for the preparation of directional light-converters and/or molecular Q-bits at the (supra)molecular level.
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Affiliation(s)
- Charlotte Egger
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland.
| | - Laure Guénée
- Laboratory of Crystallography, University of Geneva, 24 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Neel Deorukhkar
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland.
| | - Claude Piguet
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland.
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2
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Gitlina AY, Khistiaeva V, Melnikov A, Ivonina M, Sizov V, Spiridonova D, Makarova A, Vyalikh D, Grachova E. Organometallic Ir(III) complexes: post-synthetic modification, photophysical properties and binuclear complex construction. Dalton Trans 2023. [PMID: 37334469 DOI: 10.1039/d3dt00901g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
Two methods of post-synthetic modification (Suzuki coupling and CuAAC click-reaction) were applied to Ir(III) complexes [Ir(C^N)2N^N]+ to provide the second highly selective donor site. One family of functionalized complexes was used to demonstrate the potential of post-synthetic modification for controlled construction of d-d and d-f binuclear complexes. The complexes obtained were characterized by CHN elemental analysis, NMR spectroscopy, ESI mass-spectrometry, FTIR spectroscopy and single crystal X-ray diffraction analysis. By means of XPS and NEXAFS spectroscopy the coordination of diimine donor site to the Ln(III) centre has been definitely confirmed. The photophysical properties of mono- and binuclear complexes were carefully investigated, and the evolution of luminescent characteristics during the formation of a system of connected metallocenters is also discussed. TDDFT calculations were used to describe the luminescence mechanism and to confirm the conclusions made on the basis of experimental data.
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Affiliation(s)
- Anastasia Yu Gitlina
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Viktoria Khistiaeva
- Institute of Chemistry, St Petersburg University, Universitetskii pr. 26, 198504 St. Petersburg, Russia.
| | - Alexey Melnikov
- Centre for Nano- and Biotechnologies, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
| | - Mariia Ivonina
- Department of Material Sciences, Faculty of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Vladimir Sizov
- Institute of Chemistry, St Petersburg University, Universitetskii pr. 26, 198504 St. Petersburg, Russia.
| | - Dar'ya Spiridonova
- Centre for X-ray Diffraction Studies, St Petersburg University, 199034 St. Petersburg, Russia
| | - Anna Makarova
- Physikalische Chemie, Institut für Chemie und Biochemie, Freie Universität Berlin, 14195 Berlin, Germany
| | - Denis Vyalikh
- Donostia International Physics Center (DIPC), 20018 Donostia-San Sebastián, Basque Country, Spain
- IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Spain
| | - Elena Grachova
- Institute of Chemistry, St Petersburg University, Universitetskii pr. 26, 198504 St. Petersburg, Russia.
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3
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Maniaki D, Sickinger A, Barrios Moreno LA, Aguilà D, Roubeau O, Settineri NS, Guyot Y, Riobé F, Maury O, Galán LA, Aromí G. Distributive Nd-to-Yb Energy Transfer within Pure [YbNdYb] Heterometallic Molecules. Inorg Chem 2023; 62:3106-3115. [PMID: 36753476 PMCID: PMC9945097 DOI: 10.1021/acs.inorgchem.2c03940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Facile access to site-selective hetero-lanthanide molecules will open new avenues in the search of novel photophysical phenomena based on Ln-to-Ln' energy transfer (ET). This challenge demands strategies to segregate efficiently different Ln metal ions among different positions in a molecule. We report here the one-step synthesis and structure of a pure [YbNdYb] (1) coordination complex featuring short Yb···Nd distances, ideal to investigate a potential distributive (i.e., from one donor to two acceptors) intramolecular ET from one Nd3+ ion to two Yb3+ centers within a well-characterized molecule. The difference in ionic radius is the mechanism allowing to allocate selectively both types of metal ion within the molecular structure, exploited with the simultaneous use of two β-diketone-type ligands. To assist the photophysical investigation of this heterometallic species, the analogues [YbLaYb] (2) and [LuNdLu] (3) have also been prepared. Sensitization of Yb3+ and Nd3+ in the last two complexes, respectively, was observed, with remarkably long decay times, facilitating the determination of the Nd-to-Yb ET within the [YbNdYb] composite. This ET was demonstrated by comparing the emission of iso-absorbant solutions of 1, 2, and 3 and through lifetime determinations in solution and solid state. The comparatively high efficiency of this process corroborates the facilitating effect of having two acceptors for the nonradiative decay of Nd3+ created within the [YbNdYb] molecule.
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Affiliation(s)
- Diamantoula Maniaki
- Departament
de Química Inorgànica i Orgànica, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain,Institute
of Nanoscience and Nanotechnology of the University of Barcelona (IN2UB), 08028 Barcelona, Spain
| | - Annika Sickinger
- Laboratoire
de Chimie, UMR 5182, CNRS, ENS Lyon, Univ
Lyon, F69342 Lyon, France
| | - Leoní A. Barrios Moreno
- Departament
de Química Inorgànica i Orgànica, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain,Institute
of Nanoscience and Nanotechnology of the University of Barcelona (IN2UB), 08028 Barcelona, Spain
| | - David Aguilà
- Departament
de Química Inorgànica i Orgànica, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain,Institute
of Nanoscience and Nanotechnology of the University of Barcelona (IN2UB), 08028 Barcelona, Spain
| | - Olivier Roubeau
- Instituto
de Nanociencia y Materiales de Aragón (INMA), CSIC and Universidad de Zaragoza, Plaza San Francisco s/n, 50009 Zaragoza, Spain
| | - Nicholas S. Settineri
- Advanced
Light Source, Berkeley Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States,Department
of Chemistry, University of California,
Berkeley, Berkeley, California 94720, United States
| | - Yannick Guyot
- Institut
Lumière Matière, UMR 5306 CNRS—Université
Claude Bernard, Univ. Lyon, Lyon 1, 10 rue Ada Byron, F-69622 Villeurbanne Cedex, France
| | - François Riobé
- Laboratoire
de Chimie, UMR 5182, CNRS, ENS Lyon, Univ
Lyon, F69342 Lyon, France
| | - Olivier Maury
- Laboratoire
de Chimie, UMR 5182, CNRS, ENS Lyon, Univ
Lyon, F69342 Lyon, France
| | - Laura Abad Galán
- Departamento
de Química Inorgánica, Universidad
Complutense de Madrid, Avda. Complutense s/n, 28040 Madrid, Spain,
| | - Guillem Aromí
- Departament
de Química Inorgànica i Orgànica, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain,Institute
of Nanoscience and Nanotechnology of the University of Barcelona (IN2UB), 08028 Barcelona, Spain,
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4
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Bellucci L, Fioravanti L, Armelao L, Bottaro G, Marchetti F, Pineider F, Poneti G, Samaritani S, Labella L. Size Selectivity in Heterolanthanide Molecular Complexes with a Ditopic Ligand. Chemistry 2023; 29:e202202823. [PMID: 36200677 PMCID: PMC10100000 DOI: 10.1002/chem.202202823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Indexed: 11/06/2022]
Abstract
The similar reactivity of lanthanides generally leads to statistically populated polynuclear complexes, making the rational design of ordered hetero-lanthanide compounds extremely challenging. Here we report on the site selectivity in hetero-lanthanide tetranuclear complexes afforded by the relatively simple ditopic pyterpyNO ligand (4'-(4-pyridil)-2,2':6',2"-terpyridine N-oxide). The sequential room temperature reaction of RE2 (tta)6 (pyterpyNO)2 (where RE=Y, (1); Eu, (2), Dy, (3) Htta=2-thenoyltrifluoroacetone) with La(tta)3 dme (dme=dimethoxyethane) yielded Y2 La2 (tta)12 (pyterpyNO)2 (4), Dy2 La2 (tta)12 (pyterpyNO)2 (5) and Eu2 La2 (tta)12 (pyterpyNO)2 (6). Single crystals X-ray diffraction studies showed that 4, 5 and 6 are isostructural, featuring a tetranuclear structure with two different metal coordination sites with coordination numbers 8 (CN8) and 9 (CN9). The two smaller cations are mainly bridged by the O-donor atoms of the NO groups of two pyterpyNO ligands (CN8), while the larger lanthanum centres are bound by a terpyridine unit (CN9). Size selectivity has been studied with structural and magnetic studies in the solid state and through 19 F NMR and photoluminescence studies in solution, showing a direct dependence on the difference of ionic radii of the ions and yielding a 91 % selectivity for 4. Furthermore, 19 F NMR, X-ray and PL studies pointed out that the nature of the product is independent from the synthetic route for compound Eu2 Y2 (tta)12 (pyterpyNO)2 (7), keeping the ion selectivity also for a self-assembly reaction. Unexpectedly, these studies have evidenced that selectivity is not exclusively governed by electrostatic interactions related to size dimensions.
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Affiliation(s)
- Luca Bellucci
- Dipartimento di Chimica e Chimica Industriale and CIRCCUniversità di Pisavia Giuseppe Moruzzi 1356124PisaItaly
- Dipartimento di Scienze ChimicheUniversità di Padovavia Marzolo 135131PadovaItaly
- CNR ICMATE and INSTM Dipartimento di Scienze ChimicheUniversità di Padovavia Marzolo 135131PadovaItaly
| | - Lorenzo Fioravanti
- Dipartimento di Chimica e Chimica Industriale and CIRCCUniversità di Pisavia Giuseppe Moruzzi 1356124PisaItaly
| | - Lidia Armelao
- Dipartimento di Scienze ChimicheUniversità di Padovavia Marzolo 135131PadovaItaly
- CNR ICMATE and INSTM Dipartimento di Scienze ChimicheUniversità di Padovavia Marzolo 135131PadovaItaly
- Dipartimento di Scienze Chimiche eTecnologie dei Materiali (DSCTM) Consiglio Nazionale delle RicerchePiazzale A. Moro 700185RomaItaly
| | - Gregorio Bottaro
- CNR ICMATE and INSTM Dipartimento di Scienze ChimicheUniversità di Padovavia Marzolo 135131PadovaItaly
| | - Fabio Marchetti
- Dipartimento di Chimica e Chimica Industriale and CIRCCUniversità di Pisavia Giuseppe Moruzzi 1356124PisaItaly
| | - Francesco Pineider
- Dipartimento di Chimica e Chimica Industriale and CIRCCUniversità di Pisavia Giuseppe Moruzzi 1356124PisaItaly
| | - Giordano Poneti
- Instituto de QuímicaUniversidade Federal do Rio de JaneiroAvenida Athos da Silveira Ramos, 149 Centro de Tecnologia – Cidade Universitária21941-909Rio de JaneiroBrazil
| | - Simona Samaritani
- Dipartimento di Chimica e Chimica Industriale and CIRCCUniversità di Pisavia Giuseppe Moruzzi 1356124PisaItaly
| | - Luca Labella
- Dipartimento di Chimica e Chimica Industriale and CIRCCUniversità di Pisavia Giuseppe Moruzzi 1356124PisaItaly
- CNR ICMATE and INSTM Dipartimento di Scienze ChimicheUniversità di Padovavia Marzolo 135131PadovaItaly
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5
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Douib H, Flores Gonzalez J, Speed S, Montigaud V, Lefeuvre B, Dorcet V, Riobé F, Maury O, Gouasmia A, Le Guennic B, Cador O, Pointillart F. Modulation of the magnetic and photophysical properties in 3d-4f and 4f-4f' heterobimetallic complexes involving a tetrathiafulvalene-based ligand. Dalton Trans 2022; 51:16486-16496. [PMID: 36250236 PMCID: PMC9641533 DOI: 10.1039/d2dt02375j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 10/03/2022] [Indexed: 06/24/2024]
Abstract
The reaction between the 2-(1-(2,6-di(pyrazol-1-yl)-4-methylpyridyl)-4,5-(4,5-bis(propylthio)-tetrathiafulvalenyl)-1H-benzimidazol-2-yl)-pyridine ligand (L), 1 equivalent of Ln(hfac)3·2H2O/Dy(tta)3·2H2O (hfac- = 1,1,1,5,5,5-hexafluoroacetylacetonate, tta- = 2-thenoyltrifluoroacetonate) and M(hfac)2·2H2O leads to the formation of heteroleptic 3d-4f dinuclear complexes of formula [MLn(hfac)5(L)]n (M(II) = Cd, Zn, Co, Mn, Ni and Ln(III) = Dy, Yb, Nd) and [ZnDy(tta)2(hfac)3(L)]·(CH2Cl2). Their X-ray structures reveal that the two coordination sites are occupied by one Ln(III) ion and one M(II) transition metal respectively. The M(II) ions are coordinated to the benzoimidazolylpyridine (bzip) moiety in a N2O4 coordination sphere, while the Ln(III) ions are coordinated to the 2,6-di(pyrazol-1-yl)-4-pyridine (dpp) moiety in a N3O6 surrounding. When Dy(III) ion is used a field-induced Single-Molecule Magnet (SMM) behavior is detected with a magnetic relaxation time slightly dependent to the nature of the vicinal divalent transition metal. On the other hand, when the Yb(III) is used, intense, moderated or quenched 2F5/2 → 2F7/2 NIR luminescence is observed when the Yb(III) ion is respectively associated with the Zn(II), Mn(II) and Ni(II)/Co(II) ion. The emission intensity can be modulated in function of the metal-to-ligand charge transfer and d-d transition intensities. The replacement of the divalent transition metal by a trivalent lanthanide leads to the formation of heteroleptic 4f-4f' dinuclear complexes of formula [Ln2-xLn'x(hfac)6(L)]·a(CH2Cl2)·b(C6H14) and [Dy1.11Nd0.89(tta)3(hfac)3(L)]. The coordination selectivity is based on the radius. Among the 4f-4f' series, the Dy(III) derivatives displayed such ion in N2O6 eight-coordinated sphere allowing the observation of SMM behavior. The three compounds [Dy1.21Nd0.79(hfac)6(L)]·2(CH2Cl2)·(C6H14), [Yb1.04Nd0.96(hfac)6(L)] and [YbPr(hfac)6(L)] displayed respectively Nd(III), modarated Yb(III) and intense Yb(III) NIR emissions.
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Affiliation(s)
- Haiet Douib
- Institut des Sciences Chimiques de Rennes UMR 6226 CNRS-UR1, Université de Rennes 1, 35042 Rennes Cedex, France.
- Laboratoire des Matériaux Organiques et Hétérochimie (LMOH), Département des sciences de la matière, Université Larbi Tébessi de Tébessa, Route de Constantine 12002, Tébessa, Algeria
| | - Jessica Flores Gonzalez
- Institut des Sciences Chimiques de Rennes UMR 6226 CNRS-UR1, Université de Rennes 1, 35042 Rennes Cedex, France.
| | - Saskia Speed
- ENSL, CNRS, Laboratoire de Chimie UMR 5182, 46 allée d'Italie, 69364 Lyon, France
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Vincent Montigaud
- Institut des Sciences Chimiques de Rennes UMR 6226 CNRS-UR1, Université de Rennes 1, 35042 Rennes Cedex, France.
| | - Bertrand Lefeuvre
- Institut des Sciences Chimiques de Rennes UMR 6226 CNRS-UR1, Université de Rennes 1, 35042 Rennes Cedex, France.
| | - Vincent Dorcet
- Institut des Sciences Chimiques de Rennes UMR 6226 CNRS-UR1, Université de Rennes 1, 35042 Rennes Cedex, France.
| | - François Riobé
- ENSL, CNRS, Laboratoire de Chimie UMR 5182, 46 allée d'Italie, 69364 Lyon, France
| | - Olivier Maury
- ENSL, CNRS, Laboratoire de Chimie UMR 5182, 46 allée d'Italie, 69364 Lyon, France
| | - Abdelkrim Gouasmia
- Laboratoire des Matériaux Organiques et Hétérochimie (LMOH), Département des sciences de la matière, Université Larbi Tébessi de Tébessa, Route de Constantine 12002, Tébessa, Algeria
| | - Boris Le Guennic
- Institut des Sciences Chimiques de Rennes UMR 6226 CNRS-UR1, Université de Rennes 1, 35042 Rennes Cedex, France.
| | - Olivier Cador
- Institut des Sciences Chimiques de Rennes UMR 6226 CNRS-UR1, Université de Rennes 1, 35042 Rennes Cedex, France.
| | - Fabrice Pointillart
- Institut des Sciences Chimiques de Rennes UMR 6226 CNRS-UR1, Université de Rennes 1, 35042 Rennes Cedex, France.
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6
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Yim K, Yeung C, Wong MY, Probert MR, Law G. Differentiable Formation of Chiroptical Lanthanide Heterometallic Ln n Ln' 4-n (L 6 ) (n=0-4) Tetrahedra with C 2 -Symmetrical Bis(tridentate) Ligands. Chemistry 2022; 28:e202201655. [PMID: 35778773 PMCID: PMC9805037 DOI: 10.1002/chem.202201655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Indexed: 01/09/2023]
Abstract
Construction of lanthanide heterometallic complex is important for engineering multifunction molecular containers. However, it remains a challenge because of the similar ionic radii of lanthanides. Herein we attempt to prepare chiral lanthanide heterometallic tetrahedra. Upon crystallization with a mixture of [Eu2 L3 ] and [Ln2 L3 ] (Ln=Gd, Tb and Dy) helicates, a mixture of heterometallic Eun Ln'4-n (L6 ) (n=0-4) tetrahedra was prepared. Selective formation of heterometallic tetrahedron was observed as MS deconvolution results deviated from statistical results. The formation of heterometallic tetrahedron was found to be sensitive to ionic radii as well as the ratio of the two helicates used in the crystallization.
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Affiliation(s)
- King‐Him Yim
- State Key Laboratory of Chemical Biology and Drug DiscoveryDepartment of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic University Hung Hom, KowloonHong Kong)China
| | - Chi‐Tung Yeung
- State Key Laboratory of Chemical Biology and Drug DiscoveryDepartment of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic University Hung Hom, KowloonHong Kong)China
| | - Melody Yee‐Man Wong
- State Key Laboratory of Chemical Biology and Drug DiscoveryDepartment of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic University Hung Hom, KowloonHong Kong)China
| | - Michael R. Probert
- ChemistrySchool of Natural and Environmental SciencesNewcastle UniversityNewcastle Upon TyneNE1 7RUUK
| | - Ga‐Lai Law
- State Key Laboratory of Chemical Biology and Drug DiscoveryDepartment of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic University Hung Hom, KowloonHong Kong)China
- The Hong Kong Polytechnic University Shenzhen Research InstituteShenzhen518000P. R. China
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7
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Post-Functionalization of Organometallic Complexes via Click-Reaction. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27196494. [PMID: 36235030 PMCID: PMC9614606 DOI: 10.3390/molecules27196494] [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: 08/30/2022] [Revised: 09/21/2022] [Accepted: 09/26/2022] [Indexed: 11/09/2022]
Abstract
CuAAC (Cu catalyzed azide-alkyne cycloaddition) click-reaction is a simple and powerful method for the post-synthetic modification of organometallic complexes of transition metals. This approach allows the selective introduction of additional donor sites or functional groups to the periphery of the ligand environment. This is especially important if a metalloligand with free donor sites, which are of the same nature as the primary site for the coordination of the primary metal, has to be created. The concept of post-synthetic modification of organometallic complexes by click-reaction is relatively recent and the currently available experimental material does not yet allow us to identify trends and formulate recommendations to address specific problems. In the present study, we have applied the CuAAC reaction for the post-synthetic modification of diimine mononuclear complexes Re(I), Pt(II) and Ir(III) with C≡C bonds at the periphery of the ligand environment and demonstrated that click-chemistry is a powerful tool for the tunable chemical post-synthetic modification of coordination compounds.
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8
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Starck M, Fradgley JD, De Rosa DF, Batsanov AS, Papa M, Taylor MJ, Lovett JE, Lutter JC, Allen MJ, Parker D. Versatile Para-Substituted Pyridine Lanthanide Coordination Complexes Allow Late Stage Tailoring of Complex Function. Chemistry 2021; 27:17921-17927. [PMID: 34705302 PMCID: PMC8688332 DOI: 10.1002/chem.202103243] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Indexed: 12/28/2022]
Abstract
A series of cationic and neutral p-Br and p-NO2 pyridine substituted Eu(III) and Gd(III) coordination complexes serve as versatile synthetic intermediates. Nucleophilic aromatic substitution occurs readily at the para position under mild conditions, allowing C-N and C-C bond forming reactions to take place, permitting the introduction of azide, amino and alkynyl substituents. For Eu(III) complexes, this approach allows late stage tuning of absorption and emission spectral properties, exemplified by the lowering of the energy of an LMCT transition accompanied by a reduction in the Eu-Npy bond length. Additionally, these complexes provide direct access to the corresponding Eu(II) analogues. With the Gd(III) series, the nature of the p-substituent does not significantly change the EPR properties (linewidth, relaxation times), as required for their development as EPR spin probes that can be readily conjugated to biomolecules under mild conditions.
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Affiliation(s)
- Matthieu Starck
- Department of ChemistryDurham UniversitySouth RoadDurhamDH1 3LEUK
| | - Jack D. Fradgley
- Department of ChemistryDurham UniversitySouth RoadDurhamDH1 3LEUK
| | | | | | - Maria Papa
- SUPASchool of Physics and Astronomy and BSRCUniversity of St AndrewsNorth HaughSt AndrewsKY16 9SSUK
| | - Michael J. Taylor
- SUPASchool of Physics and Astronomy and BSRCUniversity of St AndrewsNorth HaughSt AndrewsKY16 9SSUK
| | - Janet E. Lovett
- SUPASchool of Physics and Astronomy and BSRCUniversity of St AndrewsNorth HaughSt AndrewsKY16 9SSUK
| | - Jacob C. Lutter
- Department of ChemistryWayne State University5101 Cass AvenueDetroitMI 48202USA
| | - Matthew J. Allen
- Department of ChemistryWayne State University5101 Cass AvenueDetroitMI 48202USA
| | - David Parker
- Department of ChemistryDurham UniversitySouth RoadDurhamDH1 3LEUK
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9
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Aguilà D, Roubeau O, Aromí G. Designed polynuclear lanthanide complexes for quantum information processing. Dalton Trans 2021; 50:12045-12057. [PMID: 34382982 DOI: 10.1039/d1dt01862k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The design of dissymmetric organic ligands featuring combinations of 1,3-diketone and 2,6-diacetylpyridine coordination pockets has been exploited to produce dinuclear and trinuclear lanthanide-based coordination compounds. These molecules exhibit two or more non-equivalent Ln ions, most remarkably enabling the access to well-defined heterolanthanide compositions. The site-selective disposition of each metal ion within the molecular entities allows the study of each centre individually as a spin-based quantum bit, affording unparalleled versatility for quantum gate design. The inherent weak interaction between the Ln ions permits the performance of multi-qubit quantum logical operations realized through their derived magnetic states, or implementing quantum-error correction protocols. The different studies performed to date on these systems are revised, showing their vast potential within spin-based quantum information processing.
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Affiliation(s)
- David Aguilà
- Departament de Química Inorgànica i Orgànica, Secció Química Inorgànica, Universitat de Barcelona, Barcelona, Spain. .,Institute of Nanoscience and Nanotechnology of the University of Barcelona (IN2UB), Barcelona, Spain
| | - Olivier Roubeau
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Zaragoza, Spain.,Departamento de Física de la Material Condensada, Universidad de Zaragoza, Zaragoza, Spain
| | - Guillem Aromí
- Departament de Química Inorgànica i Orgànica, Secció Química Inorgànica, Universitat de Barcelona, Barcelona, Spain. .,Institute of Nanoscience and Nanotechnology of the University of Barcelona (IN2UB), Barcelona, Spain
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10
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Abad Galán L, Aguilà D, Guyot Y, Velasco V, Roubeau O, Teat SJ, Massi M, Aromí G. Accessing Lanthanide-to-Lanthanide Energy Transfer in a Family of Site-Resolved [Ln III Ln III '] Heterodimetallic Complexes. Chemistry 2021; 27:7288-7299. [PMID: 33448501 DOI: 10.1002/chem.202005327] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Indexed: 12/23/2022]
Abstract
The ligand H3 L (6-[3-oxo-3-(2-hydroxyphenyl)propionyl]pyridine-2-carboxylic acid), which exhibits two different coordination pockets, has been exploited to engender and study energy transfer (ET) in two dinuclear [LnIII LnIII '] analogues of interest, [EuYb] and [NdYb]. Their structural and physical properties have been compared with newly synthesised analogues featuring no possible ET ([EuLu], [NdLu], and [GdYb]) and with the corresponding homometallic [EuEu] and [NdNd] analogues, which have been previously reported. Photophysical data suggest that ET between EuIII and YbIII does not occur to a significant extent, whereas emission from YbIII originates from sensitisation of the ligand. In contrast, energy migration seems to be occurring between the two NdIII centres in [NdNd], as well as in [NdYb], in which YbIII luminescence is thus, in part, sensitised by ET from Nd. This study shows the versatility of this molecular platform to further the investigation of lanthanide-to-lanthanide ET phenomena in defined molecular systems.
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Affiliation(s)
- Laura Abad Galán
- School of Molecular and Life Sciences and Curtin Institute for, Functional Molecules and Interfaces, Curtin University, Kent Street, Bentley, 6102, WA, Australia.,ENS de Lyon, CNRS UMR 5182, Université Lyon, Université Claude Bernard Lyon 1, 69342, Lyon, France
| | - David Aguilà
- Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Diagonal 645, 08028, Barcelona, Spain.,Institute of Nanoscience and Nanotechnology, University of Barcelona (IN2UB), 08007, Barcelona, Spain
| | - Yannick Guyot
- Institut Lumière Matière, UMR 5306 CNRS, Université Lyon, Université Claude Bernard Lyon 1, Rue Ada Byron, 69622, Villeurbanne Cedex, France
| | - Verónica Velasco
- Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Diagonal 645, 08028, Barcelona, Spain.,Institute of Nanoscience and Nanotechnology, University of Barcelona (IN2UB), 08007, Barcelona, Spain
| | - Olivier Roubeau
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC and Universidad de Zaragoza, Plaza San Francisco s/n, 50009, Zaragoza, Spain
| | - Simon J Teat
- Advanced Light Source, Berkeley Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Massimiliano Massi
- School of Molecular and Life Sciences and Curtin Institute for, Functional Molecules and Interfaces, Curtin University, Kent Street, Bentley, 6102, WA, Australia
| | - Guillem Aromí
- Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Diagonal 645, 08028, Barcelona, Spain.,Institute of Nanoscience and Nanotechnology, University of Barcelona (IN2UB), 08007, Barcelona, Spain
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11
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Buch CD, Hansen SH, Mitcov D, Tram CM, Nichol GS, Brechin EK, Piligkos S. Design of pure heterodinuclear lanthanoid cryptate complexes. Chem Sci 2021; 12:6983-6991. [PMID: 34123326 PMCID: PMC8153240 DOI: 10.1039/d1sc00987g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 04/14/2021] [Indexed: 01/01/2023] Open
Abstract
Heterolanthanide complexes are difficult to synthesize owing to the similar chemistry of the lanthanide ions. Consequently, very few purely heterolanthanide complexes have been synthesized. This is despite the fact that such complexes hold interesting optical and magnetic properties. To fine-tune these properties, it is important that one can choose complexes with any given combination of lanthanides. Herein we report a synthetic procedure which yields pure heterodinuclear lanthanide cryptates LnLn*LX3 (X = NO3 - or OTf-) based on the cryptand H3L = N[(CH2)2N[double bond, length as m-dash]CH-R-CH[double bond, length as m-dash]N-(CH2)2]3N (R = m-C6H2OH-2-Me-5). In the synthesis the choice of counter ion and solvent proves crucial in controlling the Ln-Ln* composition. Choosing the optimal solvent and counter ion afford pure heterodinuclear complexes with any given combination of Gd(iii)-Lu(iii) including Y(iii). To demonstrate the versatility of the synthesis all dinuclear combinations of Y(iii), Gd(iii), Yb(iii) and Lu(iii) were synthesized resulting in 10 novel complexes of the form LnLn*L(OTf)3 with LnLn* = YbGd 1, YbY 2, YbLu 3, YbYb 4, LuGd 5, LuY 6, LuLu 7, YGd 8, YY 9 and GdGd 10. Through the use of 1H, 13C NMR and mass spectrometry the heterodinuclear nature of YbGd, YbY, YbLu, LuGd, LuY and YGd was confirmed. Crystal structures of LnLn*L(NO3)3 reveal short Ln-Ln distances of ∼3.5 Å. Using SQUID magnetometry the exchange coupling between the lanthanide ions was found to be anti-ferromagnetic for GdGd and YbYb while ferromagnetic for YbGd.
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Affiliation(s)
- Christian D Buch
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Steen H Hansen
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Dmitri Mitcov
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Camilla M Tram
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Gary S Nichol
- EaStCHEM School of Chemistry, University of Edinburgh Edinburgh UK
| | - Euan K Brechin
- EaStCHEM School of Chemistry, University of Edinburgh Edinburgh UK
| | - Stergios Piligkos
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
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12
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Macrocyclic Chelates Bridged by a Diaza-Crown Ether: Towards Multinuclear Bimodal Molecular Imaging Probes. Molecules 2020; 25:molecules25215019. [PMID: 33138207 PMCID: PMC7663075 DOI: 10.3390/molecules25215019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/26/2020] [Accepted: 10/27/2020] [Indexed: 12/02/2022] Open
Abstract
Bridged polymacrocyclic ligands featured by structurally different cages offer the possibility of coordinating multiple trivalent lanthanide ions, giving rise to the exploitation of their different physicochemical properties, e.g., multimodal detection for molecular imaging purposes. Intrigued by the complementary properties of optical and MR-based image capturing modalities, we report the synthesis and characterization of the polymetallic Ln(III)-based chelate comprised of two DOTA-amide-based ligands (DOTA—1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) bridged via 1,10-diaza-18-crown-6 (DA18C6) motif. The DOTA-amide moieties and the DA18C6 were used to chelate two Eu(III) ions and one Tb(III) ion, respectively, resulting in a multinuclear heterometallic complex Eu2LTb. The bimetallic complex without Tb(III), Eu2L, displayed a strong paramagnetic chemical exchange saturation transfer (paraCEST) effect. Notably, the luminescence spectra of Eu2LTb featured mixed emission including the characteristic bands of Eu(III) and Tb(III). The advantageous features of the complex Eu2LTb opens new possibilities for the future design of bimodal probes and their potential applicability in CEST MR and optical imaging.
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13
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14
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Wydra K, Kobyłka MJ, Lis T, Ślepokura K, Lisowski J. Versatile Binding Modes of Chiral Macrocyclic Amine towards Rare Earth Ions. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000247] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Karol Wydra
- Department of Chemistry University of Wrocław 14 F. Joliot‐Curie 50‐383 Wrocław Poland
| | - Michał J. Kobyłka
- Department of Chemistry University of Wrocław 14 F. Joliot‐Curie 50‐383 Wrocław Poland
| | - Tadeusz Lis
- Department of Chemistry University of Wrocław 14 F. Joliot‐Curie 50‐383 Wrocław Poland
| | - Katarzyna Ślepokura
- Department of Chemistry University of Wrocław 14 F. Joliot‐Curie 50‐383 Wrocław Poland
| | - Jerzy Lisowski
- Department of Chemistry University of Wrocław 14 F. Joliot‐Curie 50‐383 Wrocław Poland
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15
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Nonat AM, Charbonnière LJ. Upconversion of light with molecular and supramolecular lanthanide complexes. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213192] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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16
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Kreidt E, Leis W, Seitz M. Direct solid-phase synthesis of molecular heterooligonuclear lanthanoid-complexes. Nat Commun 2020; 11:1346. [PMID: 32165625 PMCID: PMC7067767 DOI: 10.1038/s41467-020-15199-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 02/24/2020] [Indexed: 01/10/2023] Open
Abstract
Molecular lanthanoid complexes are highly valuable building blocks for a number of important technological applications, e.g. as contrast agents in magnetic resonance imaging (MRI) or as luminescent probes for bioassays. For the next generation of advanced applications based on molecular species, heterooligonuclear lanthanoid complexes with well-defined chemical and structural compositions are required. The great kinetic lability of trivalent lanthanoids so far prevents the realization of such molecular architectures with a universally applicable methodology. Here, we have developed functionalized molecular lanthanoid cryptates as monomeric building blocks which can be directly linked by standard solid-phase peptide synthesis to yield sequence-specific heterooligonuclear lanthanoid complexes. These molecular materials enable unique applications such as the generation of molecular codes with very convenient luminescence read-out.
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Affiliation(s)
- Elisabeth Kreidt
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany
| | - Wolfgang Leis
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany
| | - Michael Seitz
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany.
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17
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Belyaev A, Slavova SO, Solovyev IV, Sizov VV, Jänis J, Grachova EV, Koshevoy IO. Solvatochromic dual luminescence of Eu–Au dyads decorated with chromophore phosphines. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01015g] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Chromophore-containing phosphines produce highly solvatochromic gold(i) fluorophores. Their combination with red-emitting Eu centers offers a facile approach to dual emissive complexes with widely tunable luminescence characteristics.
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Affiliation(s)
- Andrey Belyaev
- Department of Chemistry
- University of Eastern Finland
- Joensuu
- Finland
| | - Sofia O. Slavova
- Institute of General and Inorganic Chemistry
- Bulgarian Academy of Sciences
- Sofia
- Bulgaria
| | - Igor V. Solovyev
- Institute of Chemistry
- St. Petersburg State University
- St. Petersburg
- Russia
| | - Vladimir V. Sizov
- Institute of Chemistry
- St. Petersburg State University
- St. Petersburg
- Russia
| | - Janne Jänis
- Department of Chemistry
- University of Eastern Finland
- Joensuu
- Finland
| | - Elena V. Grachova
- Institute of Chemistry
- St. Petersburg State University
- St. Petersburg
- Russia
| | - Igor O. Koshevoy
- Department of Chemistry
- University of Eastern Finland
- Joensuu
- Finland
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18
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Starynowicz P, Lisowski J. Chirality transfer between hexaazamacrocycles in heterodinuclear rare earth complexes. Dalton Trans 2019; 48:8717-8724. [PMID: 31134250 DOI: 10.1039/c9dt01318k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Both the chiral hexaazamacrocyle L1 based on trans-1,2-diaminocyclohexane and the achiral hexaazamacrocyle L2 based on ethylenediamine form lanthanide(iii) dinuclear μ-hydroxo bridged complexes which have been characterized by NMR and CD spectroscopy. The homodinuclear complexes of the type [Ln2(L1)2(μ-OH)2](NO3)4 (Ln = NdIII, EuIII, TbIII and YbIII) have been synthesized in the enantiopure form and the X-ray crystal structures of NdIII, EuIII and YbIII derivatives have been determined. The heterodinuclear cationic complexes [Ln(L1)Ln'(L2)(μ-OH)2X2]n+ have been generated and characterized in solution by using the mononuclear complexes of L1 and L2 as substrates. While the formation of [LnLn'(L1)2(μ-OH)2X2]n+ dinuclear complexes is accompanied by chiral narcissistic self-sorting, the formation of [Ln(L1)Ln'(L2)(μ-OH)2X2]n+ dinuclear complexes is accompanied by the sizable sociable self-sorting of macrocyclic units. The homodinuclear complexes [Y2(L1)2(μ-OH)2X2]n+ and [Ln2(L2)2(μ-OH)2X2]n+ (Ln = DyIII, PrIII and NdIII) are CD silent in the visible region due to the lack of f-f transitions and the presence of an achiral ligand, respectively. In contrast, the heterodinuclear [Y(L1S)Ln(L2)(μ-OH)2X2]n+ complexes give rise to CD signals arising from the f-f transitions because of the chirality transfer from the L1 macrocyclic unit to the L2 macrocyclic unit.
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Affiliation(s)
- Przemysław Starynowicz
- Department of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland.
| | - Jerzy Lisowski
- Department of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland.
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19
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Kofod N, Arppe-Tabbara R, Sørensen TJ. Electronic Energy Levels of Dysprosium(III) ions in Solution. Assigning the Emitting State and the Intraconfigurational 4f–4f Transitions in the Vis–NIR Region and Photophysical Characterization of Dy(III) in Water, Methanol, and Dimethyl Sulfoxide. J Phys Chem A 2019; 123:2734-2744. [DOI: 10.1021/acs.jpca.8b12034] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Nicolaj Kofod
- Department of Chemistry & Nano-Science Center, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark
| | - Riikka Arppe-Tabbara
- Department of Chemistry & Nano-Science Center, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark
| | - Thomas Just Sørensen
- Department of Chemistry & Nano-Science Center, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark
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20
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Bao G, Liu Z, Luo Y, Wong KL, Tanner PA. Effects of europium spectral probe interchange in Ln-dyads with cyclen and phen moieties. Dalton Trans 2019; 48:4314-4323. [DOI: 10.1039/c9dt00533a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Antenna-lanthanide energy transfer is investigated via a bimetallic complex with one silent and one probe lanthanide ion, when their positions are interchanged in the complex.
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Affiliation(s)
- Guochen Bao
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- People's Republic of China
- Institute for Biomedical Materials & Devices (IBMD)
| | - Zhenyu Liu
- Hong Kong Baptist University Institute of Research and Continuing Education
- Shenzhen Virtual University Park
- Shenzhen
- People's Republic of China
| | - Yuxia Luo
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- People's Republic of China
| | - Ka-Leung Wong
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- People's Republic of China
| | - Peter A. Tanner
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- People's Republic of China
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21
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Sørensen TJ, Faulkner S. Multimetallic Lanthanide Complexes: Using Kinetic Control To Define Complex Multimetallic Arrays. Acc Chem Res 2018; 51:2493-2501. [PMID: 30222311 DOI: 10.1021/acs.accounts.8b00205] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Kinetically inert lanthanide complexes are proving to be highly effective building blocks for the preparation of complex heterometallic architectures, allowing complete control of metal ion domains, which cannot be achieved under thermodynamic control. Kinetic stability may render perceivable labile coordination bonds more durable than several types of covalent interactions. For complexes in clinical use, the significance of kinetic stability cannot be overstated, and this Account treats the topic accordingly. Kinetically inert complexes can be used as building blocks for elaborate synthesis. For instance, it is now possible to prepare heterometallic lanthanide complexes containing two or more different lanthanide ions by linking kinetically robust complexes together. This approach can yield bimetallic (f-f' or d-f) and trimetallic (f-f'-f″) lanthanide complexes. In this Account, we describe our studies exploiting the slow dissociation of lanthanide complexes derived from 1,4,7,10-tetraazadodecane-1,4,7,10-tetraacetic acid (DOTA) related ligands to link complexes together through synthetic manipulation of pendent groups on the ligand skeleton or through coordination of bridging donor groups to a d-block metal center. In the course of this work, we have developed a variety of such methods, ranging from peptide coupling and diazotization to Ugi and click chemistry and have also explored the use of alternative strategies that combine orthogonal protecting group chemistry with sequential complexation of different lanthanide ions or that use self-assembly to deliver well-defined multimetallic systems. These well-defined bimetallic systems also have considerable scope for exploitation. Since the earliest studies, it has been clear that there is potential for application in the burgeoning field of molecular imaging. Heterometallic lanthanide complexes can be used as single-molecule bimodal imaging agents through incorporation of MRI active and luminescent components. Alternatively, conventional luminescence methods can be exploited in conjunction with lanthanide luminescence. In the simplest cases, a single lanthanide can be used to achieve a switchable response in combination with a transition metal complex. Bimetallic f-f' complexes allow the full potential of the approach to be realized in systems in which one lanthanide responds to changes in the concentration of an analyte, while a second lanthanide center can be used to define the concentration of the probe itself. This offers a new solution to the old dichotomy of ratiometric imaging that can potentially be applied widely.
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Affiliation(s)
- Thomas Just Sørensen
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark
| | - Stephen Faulkner
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
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Zottnick SH, Daul WG, Kerpen C, Finze M, Müller‐Buschbaum K. Lanthanide Coordination Polymers and MOFs based on the Dicyanodihydridoborate Anion. Chemistry 2018; 24:15287-15294. [DOI: 10.1002/chem.201802627] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Sven H. Zottnick
- Institut für Anorganische ChemieUniversität Würzburg Am Hubland 97074 Würzburg Germany
| | - Wiebke G. Daul
- Institut für Anorganische ChemieUniversität Würzburg Am Hubland 97074 Würzburg Germany
| | - Christoph Kerpen
- Institut für Anorganische ChemieUniversität Würzburg Am Hubland 97074 Würzburg Germany
| | - Maik Finze
- Institut für Anorganische ChemieUniversität Würzburg Am Hubland 97074 Würzburg Germany
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23
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Zottnick SH, Sprenger JAP, Finze M, Müller-Buschbaum K. Transformation of [EMIm][BPB] into a Cationic Luminescent Ln
-Coordination Polymer with the Bis(phthalato)borate Anion. Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201800254] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sven H. Zottnick
- Institut für Anorganische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Jan A. P. Sprenger
- Institut für Anorganische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Maik Finze
- Institut für Anorganische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Klaus Müller-Buschbaum
- Institut für Anorganische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
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24
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Zottnick SH, Seuffert MT, Kerpen C, Finze M, Müller-Buschbaum K. Homoleptic Luminescent Lanthanide Frameworks with the Tricyanohydridoborate Anion. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700547] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sven H. Zottnick
- Institut für Anorganische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Marcel T. Seuffert
- Institut für Anorganische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Christoph Kerpen
- Institut für Anorganische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Maik Finze
- Institut für Anorganische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Klaus Müller-Buschbaum
- Institut für Anorganische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
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25
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Zottnick SH, Sprenger JAP, Finze M, Müller‐Buschbaum K. Bis(salicylato)borate as Versatile Sensitizer for Highly Luminescent Lanthanide Oxoborates from the Ultraviolet to Near Infrared with 4f and 5d Participation of the Lanthanides. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601512] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Sven H. Zottnick
- Institut für Anorganische Chemie Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Jan A. P. Sprenger
- Institut für Anorganische Chemie Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Maik Finze
- Institut für Anorganische Chemie Universität Würzburg Am Hubland 97074 Würzburg Germany
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26
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Kotova O, Comby S, Lincheneau C, Gunnlaugsson T. White-light emission from discrete heterometallic lanthanide-directed self-assembled complexes in solution. Chem Sci 2017; 8:3419-3426. [PMID: 28507713 PMCID: PMC5417009 DOI: 10.1039/c7sc00739f] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 02/28/2017] [Indexed: 11/24/2022] Open
Abstract
Herein, we have developed a white-light-emitting system based on the formation of discrete lanthanide-based self-assembled complexes using a newly-designed ligand. We demonstrate that fine tuning of the lanthanide ions molar ratio in the self-assemblies combined with the intrinsic blue fluorescence of the ligand allows for the successful emission of pure white light with CIE coordinates of (0.33, 0.34).
White-light-emitting materials have attracted significant interest in recent years due to their potential applications in solid-state lighting and flat-panel displays. Design of such materials is challenging and often relies on the use of multiple fluorophores despite the fact that single component systems yield materials with enhanced stability and reproducibility. Herein, we have developed a white-light-emitting system based on the formation of discrete lanthanide-based self-assembled complexes using a newly-designed ligand. We demonstrate that fine tuning of the lanthanide ions molar ratio in the self-assemblies combined with the intrinsic blue fluorescence of the ligand allows for the successful emission of pure white light with CIE coordinates of (0.33, 0.34).
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Affiliation(s)
- Oxana Kotova
- School of Chemistry , Trinity Biomedical Sciences Institute (TBSI) , Trinity College Dublin , Dublin 2 , Ireland . ;
| | - Steve Comby
- School of Chemistry , Trinity Biomedical Sciences Institute (TBSI) , Trinity College Dublin , Dublin 2 , Ireland . ;
| | - Christophe Lincheneau
- School of Chemistry , Trinity Biomedical Sciences Institute (TBSI) , Trinity College Dublin , Dublin 2 , Ireland . ;
| | - Thorfinnur Gunnlaugsson
- School of Chemistry , Trinity Biomedical Sciences Institute (TBSI) , Trinity College Dublin , Dublin 2 , Ireland . ;
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27
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Sørensen TJ, Tropiano M, Kenwright AM, Faulkner S. Triheterometallic Lanthanide Complexes Prepared from Kinetically Inert Lanthanide Building Blocks. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700027] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Thomas Just Sørensen
- Nano-Science Center & Department of Chemistry; University of Copenhagen; Universitetsparken 5 2100 København Ø Denmark
- Chemistry Research Laboratory; Oxford University; 12 Mansfield Road OX1 3TA Oxford UK
| | - Manuel Tropiano
- Chemistry Research Laboratory; Oxford University; 12 Mansfield Road OX1 3TA Oxford UK
| | - Alan M. Kenwright
- Chemistry Department; Durham University; South Road DH1 3LE Durham UK
| | - Stephen Faulkner
- Chemistry Research Laboratory; Oxford University; 12 Mansfield Road OX1 3TA Oxford UK
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Junker AKR, Tropiano M, Faulkner S, Sørensen TJ. Kinetically Inert Lanthanide Complexes as Reporter Groups for Binding of Potassium by 18-crown-6. Inorg Chem 2016; 55:12299-12308. [DOI: 10.1021/acs.inorgchem.6b02063] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Anne Kathrine R Junker
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Copenhagen, Denmark
- Chemistry
Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U. K
| | - Manuel Tropiano
- Chemistry
Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U. K
| | - Stephen Faulkner
- Chemistry
Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U. K
| | - Thomas Just Sørensen
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Copenhagen, Denmark
- Chemistry
Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U. K
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29
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Liao Z, Tropiano M, Mantulnikovs K, Faulkner S, Vosch T, Sørensen TJ. Spectrally resolved confocal microscopy using lanthanide centred near-IR emission. Chem Commun (Camb) 2015; 51:2372-5. [PMID: 25563394 DOI: 10.1039/c4cc09618e] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The narrow, near infrared (NIR) emission from lanthanide ions has attracted great interest, particularly with regard to developing tools for bioimaging, where the long lifetimes of lanthanide excited states can be exploited to address problems arising from autofluorescence and sample transparency. Despite the promise of lanthanide-based probes for near-IR imaging, few reports on their use are present in the literature. Here, we demonstrate that images can be recorded by monitoring NIR emission from lanthanide complexes using detectors, optical elements and a microscope that were primarily designed for the visible part of the spectrum.
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Affiliation(s)
- Zhiyu Liao
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 København ø, Denmark.
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30
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Jia R, Gao T, Yang Y, Sun W, Chen R, Yan P, Hou G. Luminescence of Salen Lanthanide Bimetallic Complexes: Dual Emission and Energy Transfer. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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31
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Sørensen TJ, Hill LR, Faulkner S. Thermodynamics of Self-Assembly of Dicarboxylate Ions with Binuclear Lanthanide Complexes. ChemistryOpen 2015; 4:509-15. [PMID: 26478847 PMCID: PMC4603413 DOI: 10.1002/open.201500060] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Indexed: 12/21/2022] Open
Abstract
Self-assembly of a range of carboxylic acids (benzoic acid, dinicotinic acid, nicotinic acid, and isophthalic acid) with the europium complex of 5-nitro-α,α'-bis(DO3Ayl)-m-xylene (where DO3A is 1,4,7,10-tetraazacyclododecane-1,4,7-triacetic acid) has been explored to establish the thermodynamics of binding in a range of solvent systems and in a range of aqueous buffer solutions. In this system, profound effects are observed as a consequence of competition by the hydroxide ion, which outcompetes even dinicotinate at high pH. In the case of isophthalate, which binds most strongly, and dinicotinate, both enthalpic and entropic contributions to binding have been identified. The europium complex with 5-nitro-α,α'-bis(DO3Ayl)-m-xylene is found to have a solution structure significantly different from the related europium complex of 5-amino-α,α'-bis(DO3Ayl)-m-xylene. It is found that phosphate binds strongly to the europium complex of the nitro derivate but not to the europium complex of amino derivative. Lactate, citrate, and pyruvate also bind strongly to 5-nitro-α,α'-bis(Eu⋅DO3Ayl)-m-xylene, and it is concluded that the solution structure of this binuclear lanthanide complex is significantly different from that of the amino-substituted complex.
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Affiliation(s)
- Thomas Just Sørensen
- Nanoscience Centre and Department of Chemistry, University of CopenhagenUniversitetsparken 5, 2100, København Ø, Denmark
- Chemistry Research Laboratory, Oxford University12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Leila R Hill
- Chemistry Research Laboratory, Oxford University12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Stephen Faulkner
- Chemistry Research Laboratory, Oxford University12 Mansfield Road, Oxford, OX1 3TA, UK
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32
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Caffrey DF, Gunnlaugsson T. Displacement assay detection by a dimeric lanthanide luminescent ternary Tb(III)-cyclen complex: high selectivity for phosphate and nitrate anions. Dalton Trans 2015; 43:17964-70. [PMID: 25374328 DOI: 10.1039/c4dt02341b] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The luminescent dimeric ternary lanthanide–cyclen complexes (2-(Ln.1)2; Ln = Tb/Eu) were designed and both their self-assembly formation and their ability to detect anions via displacement assays were investigated using spectrophotometric titrations in MeOH solution. The formation of 2-(Tb.1)2 and 2-(Eu.1)2 was investigated in solution, and determination of the binding constants and stoichiometry showed that the former was formed almost exclusively over the 1:1 complex 2-(Tb.1) after the addition of two equivalents of 2; while for 2-(Eu.1)2 a mixture of both stoichiometries existed even after the addition of four equivalents of 2. Of these two systems, 2-(Tb.1)2 was studied in details as a probe for anions, where significant changes where observed in the photophysical properties of the complex; with the characteristic Tb(III)-centred emission being fully switched off upon the sensing of phosphates and nitrate, giving rise to the formation of a H2PO4(-):Tb.1 complex in a 1:2 stoichiometry upon sensing of H2PO4(-) by 2-(Tb.1)2, while NO3(-) gave 1:1 complex formation and two equivalents of NO3(-)·Tb.1.
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Affiliation(s)
- David F Caffrey
- School of Chemistry and Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland.
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33
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Routledge JD, Jones MW, Faulkner S, Tropiano M. Kinetically Stable Lanthanide Complexes Displaying Exceptionally High Quantum Yields upon Long-Wavelength Excitation: Synthesis, Photophysical Properties, and Solution Speciation. Inorg Chem 2015; 54:3337-45. [PMID: 25751278 DOI: 10.1021/ic503049m] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
We demonstrate how highly emissive, kinetically stable complexes can be prepared using the macrocyclic scaffold of DO3A bearing coordinating aryl ketones as highly effective sensitizing chromophores. In the europium complexes, high quantum yields (up to 18% in water) can be combined with long-wavelength excitation (370 nm). The behavior in solution upon variation of pH, studied by means of UV-vis absorption, emission, and NMR spectroscopies, reveals that the nature of the chromophore can give rise to pH-dependent behavior as a consequence of deprotonation adjacent to the carbonyl group. Knowledge of the molecular speciation in solution is therefore critical when assessing the luminescence properties of such complexes.
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Affiliation(s)
- Jack D Routledge
- University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Michael W Jones
- University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Stephen Faulkner
- University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Manuel Tropiano
- University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
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34
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Sørensen TJ, Kenwright AM, Faulkner S. Bimetallic lanthanide complexes that display a ratiometric response to oxygen concentrations. Chem Sci 2015; 6:2054-2059. [PMID: 29142674 PMCID: PMC5654241 DOI: 10.1039/c4sc03827d] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 01/12/2015] [Indexed: 01/05/2023] Open
Abstract
A pair of hetero-bimetallic lanthanide complexes containing terbium and europium ions have been prepared by coupling kinetically stable complexes together using an Ugi methodology to incorporate a naphthyl chromophore. Both complexes exhibit emission from terbium and europium in solution. The terbium centred emission varies with dissolved oxygen concentration, while the europium intensity remains essentially constant in one of the complexes.
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Affiliation(s)
- Thomas Just Sørensen
- Chemistry Research Laboratory , University of Oxford , 12 Mansfield Road , Oxford OX1 3TA , UK .
- Nano-Science Center & Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 København Ø , Denmark .
| | - Alan M Kenwright
- Department of Chemistry , University of Durham , South Road , Durham DH1 3LE , UK .
| | - Stephen Faulkner
- Chemistry Research Laboratory , University of Oxford , 12 Mansfield Road , Oxford OX1 3TA , UK .
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35
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Watkis A, Hueting R, Sørensen TJ, Tropiano M, Faulkner S. Controlling energy transfer in ytterbium complexes: oxygen dependent lanthanide luminescence and singlet oxygen formation. Chem Commun (Camb) 2015; 51:15633-6. [DOI: 10.1039/c5cc06891f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Pyrene-appended ytterbium complexes have been prepared using Ugi reactions to vary the chromophore–lanthanide separation. Energy transfer from the chromophore triplet is relatively slow, and gives rise to oxygen-dependent luminescence.
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Affiliation(s)
- Andrew Watkis
- Chemistry Research Laboratory
- University of Oxford
- Oxford OX1 3TA
- UK
| | - Rebekka Hueting
- Chemistry Research Laboratory
- University of Oxford
- Oxford OX1 3TA
- UK
| | - Thomas Just Sørensen
- Nano-Science Center & Department of Chemistry
- University of Copenhagen
- DK-2100 København Ø
- Denmark
| | - Manuel Tropiano
- Chemistry Research Laboratory
- University of Oxford
- Oxford OX1 3TA
- UK
| | - Stephen Faulkner
- Chemistry Research Laboratory
- University of Oxford
- Oxford OX1 3TA
- UK
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36
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Yuan N, Liang Y, Erichsen ES, Anwander R. Lanthanide complex-incorporated periodic mesoporous organosilica nanospheres with tunable photoluminescence. RSC Adv 2015. [DOI: 10.1039/c5ra14694a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Functional DPA (N,N-bis(trimethoxysilylpropyl)-2,6-pyridine dicarboxamide) can be successfully incorporated into mesoporous silica frameworks of regular spherical morphology to accommodate photoluminescent rare-earth metal centres.
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Affiliation(s)
- Ning Yuan
- Institut für Anorganische Chemie
- Eberhard Karls Universität Tübingen
- 72076 Tübingen
- Germany
| | - Yucang Liang
- Institut für Anorganische Chemie
- Eberhard Karls Universität Tübingen
- 72076 Tübingen
- Germany
| | | | - Reiner Anwander
- Institut für Anorganische Chemie
- Eberhard Karls Universität Tübingen
- 72076 Tübingen
- Germany
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37
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Zaïm A, Eliseeva SV, Guénée L, Nozary H, Petoud S, Piguet C. Lanthanide-to-Lanthanide Energy-Transfer Processes Operating in Discrete Polynuclear Complexes: Can Trivalent Europium Be Used as a Local Structural Probe? Chemistry 2014; 20:12172-82. [DOI: 10.1002/chem.201403206] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Indexed: 11/10/2022]
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38
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39
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Zhang SR, Du DY, Qin JS, Li SL, He WW, Lan YQ, Su ZM. 2D Cd(II)–Lanthanide(III) Heterometallic–Organic Frameworks Based on Metalloligands for Tunable Luminescence and Highly Selective, Sensitive, and Recyclable Detection of Nitrobenzene. Inorg Chem 2014; 53:8105-13. [DOI: 10.1021/ic5011083] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shu-Ran Zhang
- Institute
of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun, 130024, Jilin, People’s Republic of China
| | - Dong-Ying Du
- Institute
of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun, 130024, Jilin, People’s Republic of China
| | - Jun-Sheng Qin
- Institute
of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun, 130024, Jilin, People’s Republic of China
| | - Shun-Li Li
- Jiangsu
Key Laboratory of Biofunctional Materials, School of Chemistry and
Materials Science, Nanjing Normal University, Nanjing, 210023, Jiangsu, People’s Republic of China
| | - Wen-Wen He
- Institute
of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun, 130024, Jilin, People’s Republic of China
| | - Ya-Qian Lan
- Jiangsu
Key Laboratory of Biofunctional Materials, School of Chemistry and
Materials Science, Nanjing Normal University, Nanjing, 210023, Jiangsu, People’s Republic of China
| | - Zhong-Min Su
- Institute
of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun, 130024, Jilin, People’s Republic of China
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40
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Shaabani S, Shaabani A, Ng SW. One-pot synthesis of coumarin-3-carboxamides containing a triazole ring via an isocyanide-based six-component reaction. ACS COMBINATORIAL SCIENCE 2014; 16:176-83. [PMID: 24528142 DOI: 10.1021/co4001259] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A facile, efficient, and environmentally friendly approach has been developed for the diversity oriented synthesis of trifunctional coumarin-amide-triazole containing compounds. A wide variety of pharmacologically significant and structurally interesting compounds were synthesized via a one-pot, six-component, tandem Knoevenagel/Ugi/click reaction sequence from readily available starting materials in ethanol at room temperature in excellent overall yields. Substituents could be independently varied at five different positions.
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Affiliation(s)
- Shabnam Shaabani
- Faculty of Chemistry, Shahid Beheshti University, G. C., P.O. Box
19396-4716, Tehran, Iran
| | - Ahmad Shaabani
- Faculty of Chemistry, Shahid Beheshti University, G. C., P.O. Box
19396-4716, Tehran, Iran
| | - Seik Weng Ng
- Department
of Chemistry, University of Malaya, 50603, Kuala Lumpur, Malaysia
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, Saudi Arabia
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41
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Sørensen TJ, Hill LR, Tilney JA, Blackburn OA, Jones MW, Tropiano M, Faulkner S. Self-Assembly between Dicarboxylate Ions and Dinuclear Lanthanide Complexes: A Surprisingly Complicated Problem. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402169] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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42
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Babel L, Hoang TNY, Nozary H, Salamanca J, Guénée L, Piguet C. Lanthanide loading of luminescent multi-tridentate polymers under thermodynamic control. Inorg Chem 2014; 53:3568-78. [PMID: 24444086 DOI: 10.1021/ic4030525] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
This work illustrates the use of basic statistical mechanics for rationalizing the loading of linear multitridentate polymers with trivalent lanthanides, Ln(III), and identifies the specific ionic sizes of europium and yttrium as promising candidates for the further design of organized heterometallic f–f′ materials. Using [Ln(hfac)3] (hfac = hexafluoroacetylacetonate) as lanthanide carriers, the thermodynamically controlled formation of Wolf type-II lanthanidopolymers [{Ln(hfac)3}m(L4)] is modeled with the help of two simple microscopic descriptors: (i) the intrinsic affinity of Ln(III) for the tridentate binding sites fN3(Ln) and (ii) the intermetallic interactions ΔE1–2(Ln,Ln) operating between two occupied adjacent sites. Selective complexation (fN3La << fN3Eu > fN3(Y)) modulated by anticooperative interactions (ΔE1–2(La,La) ≃ ΔE1–2(Eu,Eu) > ΔE1–2(Y,Y) ≈ 0) favors the fixation of Eu(III) in semiorganized lanthanidopolymers [{Eu(hfac)3}m(L4)] displaying exploitable light-downshifting.
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Affiliation(s)
- Lucille Babel
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva , 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
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43
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Debroye E, Ceulemans M, Vander Elst L, Laurent S, Muller RN, Parac-Vogt TN. Controlled Synthesis of a Novel Heteropolymetallic Complex with Selectively Incorporated Lanthanide(III) Ions. Inorg Chem 2014; 53:1257-9. [DOI: 10.1021/ic402643a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elke Debroye
- Department
of Chemistry, KULeuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Matthias Ceulemans
- Department
of Chemistry, KULeuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Luce Vander Elst
- Department of General, Organic and Biomedical Chemistry, University of Mons, Place du Parc 23, 7000 Mons, Belgium
| | - Sophie Laurent
- Department of General, Organic and Biomedical Chemistry, University of Mons, Place du Parc 23, 7000 Mons, Belgium
| | - Robert N. Muller
- Department of General, Organic and Biomedical Chemistry, University of Mons, Place du Parc 23, 7000 Mons, Belgium
- Center for Microscopy and Molecular Imaging (CMMI), 6041 Gosselies, Belgium
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44
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Butler SJ, Delbianco M, Evans NH, Frawley AT, Pal R, Parker D, Puckrin RS, Yufit DS. Utility of tris(4-bromopyridyl) europium complexes as versatile intermediates in the divergent synthesis of emissive chiral probes. Dalton Trans 2014; 43:5721-30. [DOI: 10.1039/c4dt00253a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The tribromopyridyl complex is a versatile late intermediate in the divergent synthesis of emissive triazole and aryl–alkynyl substituted complexes.
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Affiliation(s)
| | | | - Nicholas H. Evans
- Department of Chemistry
- Durham University
- Durham DH1 3LE, UK
- Department of Chemistry
- Lancaster University
| | | | - Robert Pal
- Department of Chemistry
- Durham University
- Durham DH1 3LE, UK
| | - David Parker
- Department of Chemistry
- Durham University
- Durham DH1 3LE, UK
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45
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Debroye E, Parac-Vogt TN. Towards polymetallic lanthanide complexes as dual contrast agents for magnetic resonance and optical imaging. Chem Soc Rev 2014; 43:8178-92. [DOI: 10.1039/c4cs00201f] [Citation(s) in RCA: 127] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In the spotlight: polymetallic complexes permitting efficient sensitization of lanthanide luminescence and exhibiting favorable relaxometric properties.
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Affiliation(s)
- Elke Debroye
- Department of Chemistry
- KU Leuven
- 3001 Leuven, Belgium
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46
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Tropiano M, Blackburn OA, Tilney JA, Hill LR, Placidi MP, Aarons RJ, Sykes D, Jones MW, Kenwright AM, Snaith JS, Sørensen TJ, Faulkner S. Using remote substituents to control solution structure and anion binding in lanthanide complexes. Chemistry 2013; 19:16566-71. [PMID: 24203895 DOI: 10.1002/chem.201303183] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Indexed: 01/01/2023]
Abstract
A study of the anion-binding properties of three structurally related lanthanide complexes, which all contain chemically identical anion-binding motifs, has revealed dramatic differences in their anion affinity. These arise as a consequence of changes in the substitution pattern on the periphery of the molecule, at a substantial distance from the binding pocket. Herein, we explore these remote substituent effects and explain the observed behaviour through discussion of the way in which remote substituents can influence and control the global structure of a molecule through their demands upon conformational space. Peripheral modifications to a binuclear lanthanide motif derived from α,α'-bis(DO3 Ayl)-m-xylene are shown to result in dramatic changes to the binding constant for isophthalate. In this system, the parent compound displays considerable conformational flexibility, yet can be assumed to bind to isophthalate through a well-defined conformer. Addition of steric bulk remote from the binding site restricts conformational mobility, giving rise to an increase in binding constant on entropic grounds as long as the ideal binding conformation is not excluded from the available range of conformers.
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Affiliation(s)
- Manuel Tropiano
- Chemical Research Laboratory, Oxford University, 12 Mansfield Road, Oxford OX1 3TA (UK)
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47
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Hill LR, Blackburn OA, Jones MW, Tropiano M, Sørensen TJ, Faulkner S. Ternary self-assemblies in water: forming a pentanuclear ReLn4 assembly by association of binuclear lanthanide binding pockets with fac-Re(CO)3(dinicotinate)2Cl. Dalton Trans 2013; 42:16255-8. [DOI: 10.1039/c3dt51705e] [Citation(s) in RCA: 9] [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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48
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Xu HB, Deng JG, Kang B. Designed synthesis and photophysical properties of multifunctional hybrid lanthanide complexes. RSC Adv 2013. [DOI: 10.1039/c3ra40513c] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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