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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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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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Zare D, Piguet C, Prescimone A, Housecroft CE, Constable EC. Positive Cooperativity Induced by Interstrand Interactions in Silver(I) Complexes with α,α′‐Diimine Ligands. Chemistry 2022; 28:e202200912. [PMID: 35638573 PMCID: PMC9401079 DOI: 10.1002/chem.202200912] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Indexed: 11/10/2022]
Abstract
The allosteric positive cooperativity accompanying the formation of compact [CuI(α,α′‐diimine)2]+ building blocks contributed to the historically efficient synthesis of metal‐containing catenates and knotted assemblies. However, its limited magnitude can easily be overcome by the negative chelate cooperativity that controls the overall formation of related polymetallic multistranded helicates and grids. Despite the more abundant use of analogous dioxygen‐resistant [AgI(α,α′‐diimine)2]+ units in modern entangled metallo‐supramolecular assemblies, a related thermodynamic justification was absent. Solid‐state structural characterizations show the successive formation of [AgI(α,α′‐diimine)(CH3CN)][X] and [AgI(α,α′‐diimine)2][X] upon the stepwise reactions of α,α′‐diimine=2,2′‐bipyridine (bpy) or 1,10‐phenanthroline (phen) derivatives with AgX (X=BF4−, ClO4−, PF6−). In room‐temperature, 5–10 mM acetonitrile solutions, these cationic complexes exist as mixtures in fast exchange on the NMR timescale. Spectrophotometric titrations using the unsubstituted bpy and phen ligands point to the statistical (=non‐cooperative) binding of two successive bidentate ligands around AgI, a mechanism probably driven by the formation of hydrophobic belts, that overcomes the unfavorable decrease in the positive charge borne by the metallic cation. Surprisingly, the addition of methyl groups adjacent to the nitrogen donors (6,6′ positions in dmbpy; 2,9 positions in dmphen) induces positive cooperativity for the formation of [Ag(dmbpy)2]+ and [Ag(dmphen)2]+, a trend assigned to additional stabilizing interligand interactions. Adding rigid and polarizable phenyl side arms in [Ag(Brdmbpy)2]+ further reinforces the positively cooperative process, while limiting the overall decrease in metal–ligand affinity.
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Affiliation(s)
- Davood Zare
- Department of Chemistry University of Basel BPR 1096, Mattenstrasse 24a 4058 Basel Switzerland
| | - Claude Piguet
- Department of Inorganic and Analytical Chemistry University of Geneva 30 quai E. Ansermet 1211 Geneva 4 Switzerland
| | - Alessandro Prescimone
- Department of Chemistry University of Basel BPR 1096, Mattenstrasse 24a 4058 Basel Switzerland
| | - Catherine E. Housecroft
- Department of Chemistry University of Basel BPR 1096, Mattenstrasse 24a 4058 Basel Switzerland
| | - Edwin C. Constable
- Department of Chemistry University of Basel BPR 1096, Mattenstrasse 24a 4058 Basel Switzerland
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Hamacek J, Elhabiri M, Le Guennic B, Shanzer A, Albrecht-Gary AM. Metal‐Mediated Interactions in Homo‐ and Heterobimetallic Edifices with Lanthanides: A Study in Solution. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Josef Hamacek
- University of Orleans / CBM CNRS College of Science and Technology 1 Rue de ChartresBP 6759, ORLEANS Cedex 2 45067 Orleans FRANCE
| | - Mourad Elhabiri
- Université de Strasbourg: Universite de Strasbourg UMR 7042 67200 FRANCE
| | - Boris Le Guennic
- Institute of Chemical Sciences Rennes: Institut des Sciences Chimiques de Rennes CTI FRANCE
| | - Abraham Shanzer
- Weizmann Institute of Science Department of Biological Chemistry The Department of Organic Chemistry The Weizmann Institute of Science ISRAEL
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Lathion T, Guénée L, Besnard C, Bousseksou A, Piguet C. Deciphering the Influence of Meridional versus Facial Isomers in Spin Crossover Complexes. Chemistry 2018; 24:16873-16888. [PMID: 30171722 DOI: 10.1002/chem.201804161] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Indexed: 11/08/2022]
Abstract
Chelate coordination of non-symmetrical didentate pyrazine-benzimidazole (L1) or pyridine-benzimidazole (L2) N-donor ligands around divalent iron in acetonitrile produces stable homoleptic triple-helical spin crossover [Fe(Lk)3 ]2+ complexes existing as mixtures of meridional (C1 -symmetry) and facial (C3 -symmetry) isomers in slow exchange on the NMR timescale. The speciation deviates from the expected statistical ratio mer/fac=3:1, a trend assigned to the thermodynamic trans-influence, combined with solvation effects. Consequently, the observed spin state FeII low-spin ↔FeII high-spin equilibria occurring in [Fe(Lk)3 ]2+ refer to mixtures of complexes in solution, an issue usually not considered in this field, but which limits rational structure-properties correlations. Taking advantage of the selective and quantitative formation of isostructural facial isomers in non-constrained related spin crossover d-f helicates (HHH)-[LnFe(Lk)3 ]5+ (Ln is a trivalent lanthanide, Lk=L5, L6), we propose a novel strategy for assigning pertinent thermodynamic driving forces to each spin crossover triple-helical isomer. The different enthalpic contributions to the spin state equilibrium found in mer-[Fe(Lk)3 ]2+ and fac-[Fe(Lk)3 ]2+ reflect the Fe-N bond strengths dictated by the trans-influence, whereas a concomitant solvent-based entropic contribution reinforces the latter effect and results in systematic shifts of the spin crossover transitions toward higher temperature in the facial isomers.
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Affiliation(s)
- Timothée Lathion
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, 1211, Geneva 4, Switzerland
| | - Laure Guénée
- Laboratory of Crystallography, University of Geneva, 24 quai E. Ansermet, 1211, Geneva 4, Switzerland
| | - Céline Besnard
- Laboratory of Crystallography, University of Geneva, 24 quai E. Ansermet, 1211, Geneva 4, Switzerland
| | - Azzedine Bousseksou
- Laboratory of Coordination Chemistry (LCC), CNRS & Université de Toulouse (UPS, INP), 205 route de Narbonne, Toulouse, 31077 Cedex 4, France
| | - Claude Piguet
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, 1211, Geneva 4, Switzerland
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Cruz-Navarro A, Rivera JM, Durán-Hernández J, Castillo-Blum S, Flores-Parra A, Sánchez M, Hernández-Ahuactzi I, Colorado-Peralta R. Luminescence properties and DFT calculations of lanthanide(III) complexes (Ln = La, Nd, Sm, Eu, Gd, Tb, Dy) with 2,6-bis(5-methyl-benzimidazol-2-yl)pyridine. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.03.065] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Liu D, Zhou Y, Zhang Y, Li H, Chen P, Sun W, Gao T, Yan P. Chiral BINAPO-Controlled Diastereoselective Self-Assembly and Circularly Polarized Luminescence in Triple-Stranded Europium(III) Podates. Inorg Chem 2018; 57:8332-8337. [PMID: 29943980 DOI: 10.1021/acs.inorgchem.8b00986] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Chiral lanthanide helical architectures have received intense attentions in recent years because of their potential applications as chiral probes and sensors and as circularly polarized luminescence (CPL) materials. However, stereoselectivity control in the self-assembly of lanthanide helicate is challenging due to the poor stereochemical preference and variable coordination numbers of Ln(III) ions. Herein, we reported the employing chiral ancillary ligand R/S-BINAPO to induce achiral tripodal ligand to form a pair of homochiral lanthanide triple-helical podates [Eu(TTEA)((R/S)-BINAPO); R/S-1] {(R/S)-BINAPO = ( R/ S)-2,2'-bis(diphenylphosphoryl)-1,1'-binaphthyl; TTEA = tris[(4-(4,4,4-trifluoro-1,3-dioxobutyl)-benzamido)ethyl]amine}. X-ray crystallographic analysis for rac-1 reveals that the chirality of BINAPO is transferred during the self-assembly process to give either P or M helical architectures in podates. The 1H and 31P NMR and circular dichroism measurements confirm the diastereopurity of the assemblies in solution. A detailed optical and chiroptical characterization reveals that the luminescent enantiopure podates not only exhibit intense CPL with | glum| values reaching 0.072 but also show high luminescence quantum yields of 32.8%. Our results provide a feasible strategy for designing homochiral helical lanthanide supramolecular architecture and synthesizing excellent CPL materials.
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Affiliation(s)
- Dan Liu
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education; School of Chemistry and Materials Science , Heilongjiang University , Harbin 150080 , P. R. China
| | - Yanyan Zhou
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education; School of Chemistry and Materials Science , Heilongjiang University , Harbin 150080 , P. R. China
| | - Yuan Zhang
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education; School of Chemistry and Materials Science , Heilongjiang University , Harbin 150080 , P. R. China
| | - Hongfeng Li
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education; School of Chemistry and Materials Science , Heilongjiang University , Harbin 150080 , P. R. China
| | - Peng Chen
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education; School of Chemistry and Materials Science , Heilongjiang University , Harbin 150080 , P. R. China
| | - Wenbin Sun
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education; School of Chemistry and Materials Science , Heilongjiang University , Harbin 150080 , P. R. China
| | - Ting Gao
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education; School of Chemistry and Materials Science , Heilongjiang University , Harbin 150080 , P. R. China
| | - Pengfei Yan
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education; School of Chemistry and Materials Science , Heilongjiang University , Harbin 150080 , P. R. China
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Hamacek J, Vuillamy A. Controlling the Structures of Lanthanide Complexes in Self-Assemblies with Tripodal Ligands. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201701075] [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)
- Josef Hamacek
- Center for Molecular Biophysics (CBM); CNRS Orléans; Rue Charles Sadron 45071 Orleans Cedex 2 France
| | - Alexandra Vuillamy
- Center for Molecular Biophysics (CBM); CNRS Orléans; Rue Charles Sadron 45071 Orleans Cedex 2 France
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Artizzu F, Quochi F, Serpe A, Sessini E, Deplano P. Tailoring functionality through synthetic strategy in heterolanthanide assemblies. Inorg Chem Front 2015. [DOI: 10.1039/c4qi00188e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three classes of heterolanthanide assemblies, multi-dimensional frameworks (A), discrete polynuclear molecules (B) and preformed coordinated units connected by a linker (C), are discussed. Potential functionalities arising from the distance-dependent coexistence or interplay of the physical properties are pointed out.
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Affiliation(s)
- Flavia Artizzu
- Dipartimento di Scienze Chimiche e Geologiche
- University of Cagliari
- Monserrato-Cagliari
- Italy
- Dipartimento di Fisica
| | - Francesco Quochi
- Dipartimento di Fisica
- University of Cagliari
- Monserrato-Cagliari
- Italy
| | - Angela Serpe
- Dipartimento di Scienze Chimiche e Geologiche
- University of Cagliari
- Monserrato-Cagliari
- Italy
| | - Elisa Sessini
- Dipartimento di Scienze Chimiche e Geologiche
- University of Cagliari
- Monserrato-Cagliari
- Italy
| | - Paola Deplano
- Dipartimento di Scienze Chimiche e Geologiche
- University of Cagliari
- Monserrato-Cagliari
- Italy
- Dipartimento di Fisica
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