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Rajh T, Masson E, Latt KZ, Smith A, Brugh AM, Dandu N, Trainer D, Curtiss LA, Ngo AT, Hla SW. Light- and Chemical-Doping-Induced Magnetic Behavior of Eu Molecular Systems. Inorg Chem 2023; 62:12721-12729. [PMID: 37506323 DOI: 10.1021/acs.inorgchem.3c01154] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
Variable temperature electron paramagnetic resonance (VT-EPR) was used to investigate the role of the environment and oxidation states of several coordinated Eu compounds. We find that while Eu(III) chelating complexes are diamagnetic, simple chemical reduction results in the formation of paramagnetic species. In agreement with the distorted D3h symmetry of Eu molecular complexes investigated in this study, the EPR spectrum of reduced complexes showed axially symmetric signals (g⊥ = 2.001 and g∥ = 1.994) that were successfully simulated with two Eu isotopes with nuclear spin 5/2 (151Eu and 153Eu with 48% and 52% natural abundance, respectively) and nuclear g-factors 151Eu/153Eu = 2.27. Illumination of water-soluble complex Eu(dipic)3 at 4 K led to the ligand-to-metal charge transfer (LMCT) that resulted in the formation of Eu(II) in a rhombic environment (gx = 2.006, gy = 1.995, gz = 1.988). The existence of LMCT affects the luminescence of Eu(dipic)3, and pre-reduction of the complex to Eu(II)(dipic)3 reversibly reduces red luminescence with the appearance of a weak CT blue luminescence. Furthermore, encapsulation of a large portion of the dipic ligand with Cucurbit[7]uril, a pumpkin-shaped macrocycle, inhibited ligand-to-metal charge transfer, preventing the formation of Eu(II) upon illumination.
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Affiliation(s)
- Tijana Rajh
- Nanoscience and Technology Division, Argonne National Laboratory, 9700 S Cass Ave, Argonne, Illinois 60540, United States
- School of Molecular Sciences, Arizona State University, 551 E University Dr, Tempe, Arizona 85281, United States
| | - Eric Masson
- Department of Chemistry, Ohio University, Athens, Ohio 45701, United States
| | - Kyaw Zin Latt
- Nanoscience and Technology Division, Argonne National Laboratory, 9700 S Cass Ave, Argonne, Illinois 60540, United States
| | - Ashton Smith
- Department of Chemistry, Ohio University, Athens, Ohio 45701, United States
| | - Alexander M Brugh
- School of Molecular Sciences, Arizona State University, 551 E University Dr, Tempe, Arizona 85281, United States
| | - Naveen Dandu
- Department of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60608, United States
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Daniel Trainer
- Nanoscience and Technology Division, Argonne National Laboratory, 9700 S Cass Ave, Argonne, Illinois 60540, United States
| | - Larry A Curtiss
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Anh T Ngo
- Department of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60608, United States
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Saw-Wai Hla
- Nanoscience and Technology Division, Argonne National Laboratory, 9700 S Cass Ave, Argonne, Illinois 60540, United States
- Nanoscale & Quantum Phenomena Institute, and Department of Physics & Astronomy, Ohio University, Athens, Ohio 45701, United States
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Summers TJ, Sobrinho JA, de Bettencourt-Dias A, Kelly SD, Fulton JL, Cantu DC. Solution Structures of Europium Terpyridyl Complexes with Nitrate and Triflate Counterions in Acetonitrile. Inorg Chem 2023; 62:5207-5218. [PMID: 36940386 DOI: 10.1021/acs.inorgchem.3c00199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023]
Abstract
Lanthanide-ligand complexes are key components of technological applications, and their properties depend on their structures in the solution phase, which are challenging to resolve experimentally or computationally. The coordination structure of the Eu3+ ion in different coordination environments in acetonitrile is examined using ab initio molecular dynamics (AIMD) simulations and extended X-ray absorption fine structure (EXAFS) spectroscopy. AIMD simulations are conducted for the solvated Eu3+ ion in acetonitrile, both with or without a terpyridyl ligand, and in the presence of either triflate or nitrate counterions. EXAFS spectra are calculated directly from AIMD simulations and then compared to experimentally measured EXAFS spectra. In acetonitrile solution, both nitrate and triflate anions are shown to coordinate directly to the Eu3+ ion forming either ten- or eight-coordinate solvent complexes where the counterions are binding as bidentate or monodentate structures, respectively. Coordination of a terpyridyl ligand to the Eu3+ ion limits the available binding sites for the solvent and anions. In certain cases, the terpyridyl ligand excludes any solvent binding and limits the number of coordinated anions. The solution structure of the Eu-terpyridyl complex with nitrate counterions is shown to have a similar arrangement of Eu3+ coordinating molecules as the crystal structure. This study illustrates how a combination of AIMD and EXAFS can be used to determine how ligands, solvent, and counterions coordinate with the lanthanide ions in solution.
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Affiliation(s)
- Thomas J Summers
- Department of Chemical and Materials Engineering, University of Nevada, Reno, Reno, Nevada 89557-0388, United States
| | - Josiane A Sobrinho
- Department of Chemistry, University of Nevada, Reno, Reno, Nevada 89557-0705, United States
| | | | - Shelly D Kelly
- X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439-4801, United States
| | - John L Fulton
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - David C Cantu
- Department of Chemical and Materials Engineering, University of Nevada, Reno, Reno, Nevada 89557-0388, United States
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Lin WQ, Wang DR, Long WJ, Lin LS, Tao ZX, Liu JL, Liu ZQ, Leng JD. Stereoisomeric coordination polymers based on facial and meridional six-coordinate dysprosium(III ). Dalton Trans 2022; 51:5195-5202. [PMID: 35274652 DOI: 10.1039/d2dt00334a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Due to the small differences in the chemical properties of facial (fac) and meridional (mer) stereoisomers, selective synthesis of one of the isomers is challenging, especially for lanthanide complexes. By using a flexible bidentate phosphine oxide ligand, we managed to isolate three stereoisomeric 2D and 3D coordination polymers, in which six-coordinate Dy(III) ions possess fac- or mer-Cl3O3 coordination environments. Structural studies indicate that the stereochemistry differences result from their various supramolecular interactions (e.g., hydrogen bonding and π⋯π stacking). Magnetic property measurements reveal the different static and dynamic magnetic behaviours of the three stereoisomers. Ab initio CASSCF calculations were then performed which indicated that their distinct magnetic behaviours arise from their fac/mer configurations. Compared to fac-Dy(III), mer-Dy(III) possesses more axial ground-state KDs and higher first excited KDs.
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Affiliation(s)
- Wei-Quan Lin
- School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials, Guangzhou University, No. 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center, Guangzhou 510006, P. R. China.
| | - Dan-Ru Wang
- School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials, Guangzhou University, No. 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center, Guangzhou 510006, P. R. China.
| | - Wei-Jian Long
- School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials, Guangzhou University, No. 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center, Guangzhou 510006, P. R. China.
| | - Li-Shan Lin
- School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials, Guangzhou University, No. 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center, Guangzhou 510006, P. R. China.
| | - Ze-Xian Tao
- School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials, Guangzhou University, No. 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center, Guangzhou 510006, P. R. China.
| | - Jun-Liang Liu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Zhao-Qing Liu
- School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials, Guangzhou University, No. 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center, Guangzhou 510006, P. R. China.
| | - Ji-Dong Leng
- School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials, Guangzhou University, No. 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center, Guangzhou 510006, P. R. China.
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Shavaleev NM, Eliseeva SV, Scopelliti R, Bünzli JCG. Influence of Symmetry on the Luminescence and Radiative Lifetime of Nine-Coordinate Europium Complexes. Inorg Chem 2015; 54:9166-73. [DOI: 10.1021/acs.inorgchem.5b01580] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nail M. Shavaleev
- École Polytechnique Fédérale de
Lausanne, Institut des Sciences et Ingénierie Chimiques, Avenue Forel
2, BCH, CH-1015 Lausanne, Switzerland
| | - Svetlana V. Eliseeva
- École Polytechnique Fédérale de
Lausanne, Institut des Sciences et Ingénierie Chimiques, Avenue Forel
2, BCH, CH-1015 Lausanne, Switzerland
| | - Rosario Scopelliti
- École Polytechnique Fédérale de
Lausanne, Institut des Sciences et Ingénierie Chimiques, Avenue Forel
2, BCH, CH-1015 Lausanne, Switzerland
| | - Jean-Claude G. Bünzli
- École Polytechnique Fédérale de
Lausanne, Institut des Sciences et Ingénierie Chimiques, Avenue Forel
2, BCH, CH-1015 Lausanne, Switzerland
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Bradberry SJ, Savyasachi AJ, Peacock RD, Gunnlaugsson T. Quantifying the formation of chiral luminescent lanthanide assemblies in an aqueous medium through chiroptical spectroscopy and generation of luminescent hydrogels. Faraday Discuss 2015; 185:413-31. [DOI: 10.1039/c5fd00105f] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Herein we present the synthesis and the photophysical evaluation of water-soluble chiral ligands (2·(R,R) and 2·(S,S)) and their application in the formation of lanthanide directed self-assembled structures. These pyridine-2,6-dicarboxylic amide based ligands, possessing two naphthalene moieties as sensitising antennae, that can be used to populate the excited state of lanthanide ions, were structurally modified using 3-propanesultone and caesium carbonate, allowing for the incorporation of a water-solubilising sulfonate motif. We show, using microwave synthesis, that Eu(iii) forms chiral complexes in 1 : 3 (M : L) stoichiometries (Eu·[2·(R,R)]3 and Eu·[2·(S,S)]3) with these ligands, and that the red Eu(iii)-centred emission arising from these complexes has quantum yields (Φtot) of 12% in water. Both circular dichroism (CD) and circular polarised luminescence (CPL) analysis show that the complexes are chiral; giving rise to characteristic CD and CPL signatures for both the Λ and the Δ complexes, which both possess characteristic luminescence dissymmetry factors (glum), describing the structure in solution. The self-assembly process was also monitored in situ by observing the changes in the ligand absorption and fluorescence emission, as well as in the Eu(iii) luminescence. The change, fitted using non-linear regression analysis, demonstrated high binding affinity for Eu(iii) which in part can be assigned to being driven by additional hydrophobic effects. Moreover, using CD spectroscopy, the changes in the chiroptical properties of both (2·(R,R) and 2·(S,S)) were monitored in real time. Fitting the changes in the CD spectra allowed for the step-wise binding constants to be determined for these assemblies; these matched well with those determined from both the ground and the excited state changes. Both the ligands and the Eu(iii) complexes were then used in the formation of hydrogels; the Eu(iii)-metallogels were luminescent to the naked-eye.
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Affiliation(s)
- Samuel J. Bradberry
- School of Chemistry and Trinity Biomedical Sciences Institute (TBSI)
- Trinity College Dublin
- University of Dublin
- Dublin 2
- Ireland
| | - Aramballi Jayant Savyasachi
- School of Chemistry and Trinity Biomedical Sciences Institute (TBSI)
- Trinity College Dublin
- University of Dublin
- Dublin 2
- Ireland
| | | | - Thorfinnur Gunnlaugsson
- School of Chemistry and Trinity Biomedical Sciences Institute (TBSI)
- Trinity College Dublin
- University of Dublin
- Dublin 2
- Ireland
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7
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Aboshyan-Sorgho L, Lathion T, Guénée L, Besnard C, Piguet C. Thermodynamic N-donor trans influence in labile pseudo-octahedral zinc complexes: a delusion? Inorg Chem 2014; 53:13093-104. [PMID: 25407515 DOI: 10.1021/ic5022559] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
While the forces responsible for the chelate effect are well-established in coordination chemistry, the origin and implementation of the related thermodynamic trans influence remains debatable. This work illustrates a simple approach for quantifying this effect in labile pseudo-octahedral [Zn(Lk)3](2+) complexes lacking stereochemical preferences (Lk = L1–L4 are unsymmetrical didentate α,α′-diimine ligands). In line with statistics, the triply degenerated meridional isomers mer-[Zn(Lk)3](2+) are stabilized by 0.8 ≤ ΔGexch(mer→fac) ≤ 4.2 kJ/mol over their nondegenerated facial analogues fac-[Zn(Lk)3](2+) and therefore display no apparent trans influence at room temperature. However, the dissection of the free energy terms into opposite enthalpic (favoring the facial isomers) and entropic (favoring the meridional isomers) contributions reveals a trans influence assigned to solvation processes occurring in polar solvents. Altogether, the thermodynamic trans influence operating in [Zn(α,α′-diimine)3](2+) complexes is 1–2 orders of magnitude smaller than the chelate effect. A weak templating effect provided by a noncovalent lanthanide tripod is thus large enough to produce the wanted facial isomer at room temperature.
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Affiliation(s)
- Lilit Aboshyan-Sorgho
- Department of Inorganic and Analytical Chemistry, and ‡Laboratory of Crystallography, University of Geneva , 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
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Kotova O, Blasco S, Twamley B, O'Brien J, Peacock RD, Kitchen JA, Martínez-Calvo M, Gunnlaugsson T. The application of chiroptical spectroscopy (circular dichroism) in quantifying binding events in lanthanide directed synthesis of chiral luminescent self-assembly structures. Chem Sci 2014; 6:457-471. [PMID: 28936303 PMCID: PMC5588118 DOI: 10.1039/c4sc02474e] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Accepted: 10/10/2014] [Indexed: 12/11/2022] Open
Abstract
The binding of asymmetrical and optically pure tridentate ligands containing one carboxylic group and 2-naphthyl as an antenna to lanthanide ions was studied in CH3CN.
The binding of asymmetrical and optically pure tridentate ligands (L = 1(S) and 1(R)) containing one carboxylic group and 2-naphthyl as an antenna to lanthanide ions (M = La(iii) and Eu(iii)) was studied in CH3CN, showing the successive formation of M:L, M:L2 and M:L3 stoichiometric species in solution. The europium complexes EuL3 were also synthesised, structurally characterised and their photophysical properties probed in CH3OH and CH3CN. The changes in the chiroptical properties of both 1(S) and 1(R) were used (by circular dichroism (CD) spectroscopy) to monitor the formation of these chiral self-assemblies in solution. While circularly polarised luminescence (CPL) showed the formation of Eu(1(S))3 and Eu(1(R))3 as enantiomers, with high luminescence dissymmetry factors (glum), fitting the CD changes allowed for binding constants to be determined that were comparable to those seen in the analyses of absorbance and luminescence changes.
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Affiliation(s)
- Oxana Kotova
- School of Chemistry , Trinity Biomedical Sciences Institute , Trinity College Dublin , Dublin 2 , Ireland . ;
| | - Salvador Blasco
- School of Chemistry , Trinity Biomedical Sciences Institute , Trinity College Dublin , Dublin 2 , Ireland . ;
| | - Brendan Twamley
- School of Chemistry , Trinity Biomedical Sciences Institute , Trinity College Dublin , Dublin 2 , Ireland . ;
| | - John O'Brien
- School of Chemistry , Trinity Biomedical Sciences Institute , Trinity College Dublin , Dublin 2 , Ireland . ;
| | - Robert D Peacock
- School of Chemistry , University of Glasgow , Glasgow , G12 8QQ , Scotland , UK
| | - Jonathan A Kitchen
- School of Chemistry , Trinity Biomedical Sciences Institute , Trinity College Dublin , Dublin 2 , Ireland . ; .,Chemistry , University of Southampton , Southampton , SO17 1BJ , UK
| | - Miguel Martínez-Calvo
- School of Chemistry , Trinity Biomedical Sciences Institute , Trinity College Dublin , Dublin 2 , Ireland . ;
| | - Thorfinnur Gunnlaugsson
- School of Chemistry , Trinity Biomedical Sciences Institute , Trinity College Dublin , Dublin 2 , Ireland . ;
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Zaïm A, Favera ND, Guénée L, Nozary H, Hoang TNY, Eliseeva SV, Petoud S, Piguet C. Lanthanide hexafluoroacetylacetonates vs. nitrates for the controlled loading of luminescent polynuclear single-stranded oligomers. Chem Sci 2013. [DOI: 10.1039/c2sc21982d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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10
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Yamauchi S, Hashibe T, Murase M, Hagiwara H, Matsumoto N, Tsuchimoto M. ‘Facial’ and ‘meridional’ coordination geometries and luminescence properties of tris(N-[(imidazol-4-yl)methylidene]-dl-alaninato)europium(III) and tris(N-[(imidazol-4-yl)methylidene]-dl-phenylalaninato)europium(III). Polyhedron 2013. [DOI: 10.1016/j.poly.2012.10.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ryan PE, Canard G, Koeller S, Bocquet B, Piguet C. Allosteric Effects in Binuclear Homo- and Heterometallic Triple-Stranded Lanthanide Podates. Inorg Chem 2012; 51:10012-24. [DOI: 10.1021/ic301631n] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Patrick E. Ryan
- Department of Inorganic, Analytical
and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Gabriel Canard
- Department of Inorganic, Analytical
and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
- Faculty of Sciences de Marseille Saint Jérôme, Avenue escadrille
Normandie-Niemen, F-13397 Marseille Cedex 20, France
| | - Sylvain Koeller
- Department of Inorganic, Analytical
and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Bernard Bocquet
- Department of Inorganic, Analytical
and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Claude Piguet
- Department of Inorganic, Analytical
and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
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Zaïm A, Nozary H, Guénée L, Besnard C, Lemonnier JF, Petoud S, Piguet C. N-Heterocyclic tridentate aromatic ligands bound to [Ln(hexafluoroacetylacetonate)3] units: thermodynamic, structural, and luminescent properties. Chemistry 2012; 18:7155-68. [PMID: 22549920 DOI: 10.1002/chem.201102827] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Indexed: 11/09/2022]
Abstract
Herein, we discuss how, why, and when cascade complexation reactions produce stable, mononuclear, luminescent ternary complexes, by considering the binding of hexafluoroacetylacetonate anions (hfac(-)) and neutral, semi-rigid, tridentate 2,6-bis(benzimidazol-2-yl)pyridine ligands (Lk) to trivalent lanthanide atoms (Ln(III)). The solid-state structures of [Ln(Lk)(hfac)(3)] (Ln=La, Eu, Lu) showed that [Ln(hfac)(3)] behaved as a neutral six-coordinate lanthanide carrier with remarkable properties: 1) the strong cohesion between the trivalent cation and the didentate hfac anions prevented salt dissociation; 2) the electron-withdrawing trifluoromethyl substituents limited charge-neutralization and favored cascade complexation with Lk; 3) nine-coordination was preserved for [Ln(Lk)(hfac)(3)] for the complete lanthanide series, whilst a counterintuitive trend showed that the complexes formed with the smaller lanthanide elements were destabilized. Thermodynamic and NMR spectroscopic studies in solution confirmed that these characteristics were retained for solvated molecules, but the operation of concerted anion/ligand transfers with the larger cations induced subtle structural variations. Combined with the strong red photoluminescence of [Eu(Lk)(hfac)(3)], the ternary system Ln(III)/hfac(-)/Lk is a promising candidate for the planned metal-loading of preformed multi-tridentate polymers.
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Affiliation(s)
- Amir Zaïm
- Department of Inorganic, Analytical, and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, 1211 Geneva 4, Switzerland
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Chang CA, Wang IF, Lee HY, Meng CN, Liu KY, Chen YF, Yang TH, Wang YM, Tsay YG. The formation stability, hydrolytic behavior, mass spectrometry, DFT study, and luminescence properties of trivalent lanthanide complexes of H2ODO2A. Dalton Trans 2012; 41:14697-706. [DOI: 10.1039/c2dt31479g] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Kitchen JA, Barry DE, Mercs L, Albrecht M, Peacock RD, Gunnlaugsson T. Circularly Polarized Lanthanide Luminescence from Langmuir-Blodgett Films Formed from Optically Active and Amphiphilic EuIII-Based Self-Assembly Complexes. Angew Chem Int Ed Engl 2011; 51:704-8. [DOI: 10.1002/anie.201106863] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Indexed: 01/02/2023]
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Kitchen JA, Barry DE, Mercs L, Albrecht M, Peacock RD, Gunnlaugsson T. Circularly Polarized Lanthanide Luminescence from Langmuir-Blodgett Films Formed from Optically Active and Amphiphilic EuIII-Based Self-Assembly Complexes. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201106863] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Smola S, Rusakova N, Korovin YU. New luminescent heteronuclear Ln(III)–Bi(III) complexes (Ln = Nd, Eu, Tb, Yb) based on aminopolycarboxylic acids. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.558576] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- S. Smola
- a Department of Chemistry of Lanthanides , A.V. Bogatsky Physico-Chemical Institute , 65080 Odessa , Ukraine
| | - N. Rusakova
- a Department of Chemistry of Lanthanides , A.V. Bogatsky Physico-Chemical Institute , 65080 Odessa , Ukraine
| | - YU. Korovin
- a Department of Chemistry of Lanthanides , A.V. Bogatsky Physico-Chemical Institute , 65080 Odessa , Ukraine
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Lugo (neé Gushwa) AF, Richards AF. Ketiminato and ketimine Co, Eu, Cu and Fe complexes. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.02.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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18
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Deiters E, Gumy F, Bünzli JCG. Acridone-Benzimidazole Ring-Fused Ligands: A New Class of Sensitizers of Lanthanide Luminescence via Low-Energy Excitation. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.200901148] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Lemonnier JF, Guénée L, Bernardinelli G, Vigier JF, Bocquet B, Piguet C. Planned Failures from the Principle of Maximum Site Occupancy in Lanthanide Helicates. Inorg Chem 2010; 49:1252-65. [DOI: 10.1021/ic902314f] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jean-François Lemonnier
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Laure Guénée
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Gérald Bernardinelli
- Laboratory of Crystallography, University of Geneva, 24 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Jean-François Vigier
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Bernard Bocquet
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Claude Piguet
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
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Piguet C, Bünzli JCG. Chapter 247 Self-Assembled Lanthanide Helicates. HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS VOLUME 40 2010. [DOI: 10.1016/s0168-1273(10)40007-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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21
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Riis-Johannessen T, Dallaâ
Favera N, Todorova T, Huber S, Gagliardi L, Piguet C. Understanding, Controlling and Programming Cooperativity in Self-Assembled Polynuclear Complexes in Solution. Chemistry 2009; 15:12702-18. [DOI: 10.1002/chem.200900904] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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22
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Dalla Favera N, Guénée L, Bernardinelli G, Piguet C. In search for tuneable intramolecular intermetallic interactions in polynuclear lanthanide complexes. Dalton Trans 2009:7625-38. [DOI: 10.1039/b905131g] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Kannan S, Moody MA, Barnes CL, Duval PB. Lanthanum(III) and Uranyl(VI) Diglycolamide Complexes: Synthetic Precursors and Structural Studies Involving Nitrate Complexation. Inorg Chem 2008; 47:4691-5. [DOI: 10.1021/ic7025076] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shanmugaperumal Kannan
- Department of Chemistry, University of Missouri-Columbia, 601 South College Avenue, Columbia, Missouri 65211
| | - Morgan A. Moody
- Department of Chemistry, University of Missouri-Columbia, 601 South College Avenue, Columbia, Missouri 65211
| | - Charles L. Barnes
- Department of Chemistry, University of Missouri-Columbia, 601 South College Avenue, Columbia, Missouri 65211
| | - Paul B. Duval
- Department of Chemistry, University of Missouri-Columbia, 601 South College Avenue, Columbia, Missouri 65211
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24
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Jensen TB, Scopelliti R, Bünzli JCG. Tuning the self-assembly of lanthanide triple stranded heterobimetallic helicates by ligand design. Dalton Trans 2008:1027-36. [DOI: 10.1039/b715672c] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Jensen TB, Scopelliti R, Bünzli JCG. Thermodynamic Parameters Governing the Self-Assembly of Head–Head–Head Lanthanide Bimetallic Helicates. Chemistry 2007; 13:8404-10. [PMID: 17600785 DOI: 10.1002/chem.200700468] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The heterobitopic ligands L ABX (X=1, 2, 3, 4 or 5), differing only by a Cl or NEt(2) substituent, have been designed to complex with a pair of lanthanide ions to form triple-stranded bimetallic helicates of overall composition [Ln2(L ABX)3]6+. The percentage of HHH (head-head-head) isomer, in which each of the three ligand strands coordinates to the same lanthanide ion with the same coordination unit, is deciding the ability of the ligands to selectively form heterobimetallic complexes containing one luminescent and one magnetic or two different luminescent ions. It deviates significantly from the statistical value of 25 % and ranges from 6-20 % for L AB2 complexes to 93-96 % for L AB4 complexes. The equilibrium between HHT (head-head-tail) and HHH isomers has been investigated in detail for homobimetallic helicates (Ln=Y, La, Ce, Pr, Nd, Sm, Eu, Lu) by means of variable temperature NMR and thermodynamic parameters have been determined. The equilibrium is characterized by small values of DeltaH and DeltaS, which vary in opposite direction along the lanthanide series for complexes with the same ligand in a way that keeps the value of DeltaG almost constant. The results are interpreted in terms of differences in interstrand stacking, ion-dipole interactions and metal-metal repulsion.
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Affiliation(s)
- Thomas B Jensen
- Laboratory of Lanthanide Supramolecular Chemistry, Ecole Polytechnique Fédérale de Lausanne, LCSL-BCH 1401 Lausanne, Switzerland
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26
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Kottas GS, Mehlstäubl M, Fröhlich R, De Cola L. Highly Luminescent, Neutral, Nine-Coordinate Lanthanide(III) Complexes. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200700514] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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27
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Koeller S, Bernardinelli G, Piguet C. Covalent tripods for assembling triple-helical lanthanide podates. CR CHIM 2006. [DOI: 10.1016/j.crci.2005.12.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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28
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Duval PB, Kannan S, Barnes CL. Convenient syntheses of uranyl(VI) cis-dihalide complexes as anhydrous starting materials. INORG CHEM COMMUN 2006. [DOI: 10.1016/j.inoche.2006.01.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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29
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Cantuel M, Gumy F, Bünzli JCG, Piguet C. Encapsulation of labile trivalent lanthanides into a homobimetallic chromium(iii)-containing triple-stranded helicate. Synthesis, characterization, and divergent intramolecular energy transfers. Dalton Trans 2006:2647-60. [PMID: 16804577 DOI: 10.1039/b602392d] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The segmental bidentate-tridentate-bidentate ligand L2 reacts with M(II) (M = Cr, Zn) and Ln(III) (Ln = La, Eu, Gd, Tb, Lu) to give the heterotrimetallic triple-stranded helicates [MLnM(L2)3]7+. For M = Zn(II), the isolated complexes [ZnLnZn(L2)3](CF3SO3)7 (Ln = Eu, Tb) display only lanthanide-centred luminescence arising from the pseudo-tricapped trigonal prismatic LnN9 coordination site. For M = Cr(II), rapid air oxidation provides Cr(III) and leads to the isolation of inert [CrLnCr(L2)3](CF3SO3)9 (Ln = Eu, Tb) complexes, in which divergent intramolecular Ln --> Cr energy transfers can be evidenced. Taking [ZnEuZn(L2)3]7+ as a luminescent standard for Eu-centred emission, a quantitative treatment of the energy migration processes indicates that the rate constant characterizing the Eu --> Cr energy transfer is more efficient in the trimetallic system, than in the analogous simple bimetallic edifice. Particular attention is focused on potential control of directional energy transfer processes in Cr-Ln pairs.
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Affiliation(s)
- Martine Cantuel
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211, Geneva 4, Switzerland
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30
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Kapoor R, Pathak A, Kapoor P, Venugopalan P. Studies on cobalt(II) complexes with N,N,N′,N′-tetraethylpyridine-2,6-dicarboxamide(L1) containing and anions: X-ray crystal structures of [Co(L1)2(CH3CN)](PF6)2 and. Polyhedron 2006. [DOI: 10.1016/j.poly.2005.06.060] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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31
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Kapoor R, Kataria A, Venugopalan P, Kapoor P, Hundal G, Corbella M. Coordination Chemistry of
N
,
N
,
N′
,
N′
‐Tetraethylpyridine‐2,6‐dithiocarboxamide (
S
‐dept) – X‐ray Crystal Structures and Magnetic Properties of [Co(
S
‐dept)X
2
] (X = Br, I, and NCS). Eur J Inorg Chem 2005. [DOI: 10.1002/ejic.200500318] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ramesh Kapoor
- Department of Chemistry, Panjab University, Chandigarh 160014, India
| | - Ashok Kataria
- Department of Chemistry, Panjab University, Chandigarh 160014, India
| | | | - Pratibha Kapoor
- Department of Chemistry, Panjab University, Chandigarh 160014, India
| | - Geeta Hundal
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Montserrat Corbella
- Departament de Química Inorgànica, Facultat de Química, Universitat de Barcelona, 08028 Barcelona, Spain
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32
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Hamacek J, Borkovec M, Piguet C. A Simple Thermodynamic Model for Quantitatively Addressing Cooperativity in Multicomponent Self-Assembly Processes—Part 2: Extension to Multimetallic Helicates Possessing Different Binding Sites. Chemistry 2005; 11:5227-37. [PMID: 15991209 DOI: 10.1002/chem.200500289] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The extended site-binding model, which explicitly separates intramolecular interactions (i.e., intermetallic and interligand) from the successive binding of metal ions to polytopic receptors, is used for unravelling the self-assembly of trimetallic double-stranded Cu(I) and triple-stranded Eu(III) helicates. A thorough analysis of the available stability constants systematically shows that negatively cooperative processes operate, in strong contrast with previous reports invoking either statistical behaviours or positive cooperativity. Our results also highlight the need for combining successive generations of complexes with common binding units, but with increasing metallic nuclearities, for rationalizing and programming multicomponent supramolecular assemblies.
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Affiliation(s)
- Josef Hamacek
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, 1211 Geneva 4, Switzerland.
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33
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Hamacek J, Borkovec M, Piguet C. A Simple Thermodynamic Model for Quantitatively Addressing Cooperativity in Multicomponent Self-Assembly Processes—Part 1: Theoretical Concepts and Application to Monometallic Coordination Complexes and Bimetallic Helicates Possessing Identical Binding Sites. Chemistry 2005; 11:5217-26. [PMID: 15991210 DOI: 10.1002/chem.200500290] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A thermodynamic model has been developed for quantitatively estimating cooperativity in supramolecular polymetallic [M(m)L(n)] assemblies, as the combination of two simple indexes measuring intermetallic (I(c)MM) and interligand (I(c)LL) interactions. The usual microscopic intermolecular metal-ligand affinities (f(i)(M,L)) and intermetallic interaction parameters (uMM), adapted to the description of successive intermolecular binding of metal ions to a preorganized receptor, are completed with interligand interactions (uLL) and effective concentrations (c(eff)), accounting for the explicit free energy associated with the aggregation of the ligands forming the receptor. Application to standard monometallic pseudo-octahedral complexes [M(L)(n)(H2O)(6 - n)] (M = Co, Ni, Hf, L = ammonia, fluoride, imidazole, n = 1-6) systematically shows negative cooperativity (uLL < 1), which can be modulated by the electronic structures, charges, and sizes of the entering ligands and of the metal ions. Extension to the self-assembly of more sophisticated bimetallic helicates possessing identical binding sites is discussed, together with the origin of the positively cooperative formation of [Eu2(L3)3].
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Affiliation(s)
- Josef Hamacek
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, 1211 Geneva 4, Switzerland.
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34
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Zeckert K, Hamacek J, Rivera JP, Floquet S, Pinto A, Borkovec M, Piguet C. A Simple Thermodynamic Model for Rationalizing the Formation of Self-Assembled Multimetallic Edifices: Application to Triple-Stranded Helicates. J Am Chem Soc 2004; 126:11589-601. [PMID: 15366906 DOI: 10.1021/ja0483443] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reaction of the bis-tridentate ligand bis[1-ethyl-2-[6'-(N,N-diethylcarbamoyl)pyridin-2'-yl]benzimidazol-5-yl]methane (L2) with Ln(CF(3)SO(3))(3).xH(2)O in acetonitrile (Ln = La-Lu) demonstrates the successive formation of three stable complexes [Ln(L2)(3)](3+), [Ln(2)(L2)(3)](6+), and [Ln(2)(L2)(2)](6+). Crystal-field independent NMR methods establish that the crystal structure of [Tb(2)(L2)(3)](6+) is a satisfying model for the helical structure observed in solution. This allows the qualitative and quantitative beta23 (bi,Ln1,Ln2)characterization of the heterobimetallic helicates [(Ln(1))(Ln(2))(L2)(3)](6+). A simple free energy thermodynamic model based on (i) an absolute affinity for each nine-coordinate lanthanide occupying a terminal N(6)O(3) site and (ii) a single intermetallic interaction between two adjacent metal ions in the complexes (DeltaE) successfully models the experimental macroscopic constants and allows the rational molecular programming of the extended trimetallic homologues [Ln(3)(L5)(3)](9+).
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Affiliation(s)
- Kornelia Zeckert
- Contribution from the Department of Inorganic, Analytical, and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
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