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Golesorkhi B, Guénée L, Nozary H, Fürstenberg A, Suffren Y, Eliseeva SV, Petoud S, Hauser A, Piguet C. Thermodynamic Programming of Erbium(III) Coordination Complexes for Dual Visible/Near-Infrared Luminescence. Chemistry 2018; 24:13158-13169. [PMID: 30016559 DOI: 10.1002/chem.201802277] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 07/16/2018] [Indexed: 11/10/2022]
Abstract
Intrigued by the unexpected room-temperature dual visible/near-infrared (NIR) luminescence observed for fast-relaxing erbium complexes embedded in triple-stranded helicates, in this contribution, we explore a series of six tridentate N-donor receptors L4-L9 with variable aromaticities and alkyl substituents to extricate the stereoelectronic features responsible for such scarce optical signatures. Detailed solid-state (X-ray diffraction, differential scanning calorimetry, optical spectroscopy) and solution (speciations and thermodynamic stabilities, spectrophotometry, NMR and optical spectroscopy) studies of mononuclear unsaturated [Er(Lk)2 ]3+ and saturated triple-helical [Er(Lk)3 ]3+ model complexes reveal that the stereoelectronic changes induced by the organic ligands affect inter- and intramolecular interactions to such an extent that 1) melting temperatures in solids, 2) the affinity for trivalent erbium in solution, and 3) optical properties in luminescent complexes can be rationally varied and controlled. With this toolkit in hand, mononuclear erbium complexes with low stabilities displaying only NIR emission can be transformed into molecular-based dual Er-centered visible/NIR emitters operating at room temperature in both solid and solution states.
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Affiliation(s)
- Bahman Golesorkhi
- 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
| | - Homayoun Nozary
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211, Geneva 4, Switzerland
| | - Alexandre Fürstenberg
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211, Geneva 4, Switzerland
| | - Yan Suffren
- Department of Physical Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211, Geneva 4, Switzerland.,Current address: Université Rennes, INSA Rennes, CNRS, ISCR "Institut des Sciences Chimiques de Rennes", F-35708, Rennes, France
| | - Svetlana V Eliseeva
- Centre de Biophysique Moléculaire, CNRS UPR 4301, Rue Charles Sadron, F-45071, Orléans Cedex 2, France
| | - Stéphane Petoud
- Centre de Biophysique Moléculaire, CNRS UPR 4301, Rue Charles Sadron, F-45071, Orléans Cedex 2, France
| | - Andreas Hauser
- Department of Physical 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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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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Kumar NSS, Shafikov MZ, Whitwood AC, Donnio B, Karadakov PB, Kozhevnikov VN, Bruce DW. Mesomorphism and Photophysics of Some Metallomesogens Based on Hexasubstituted 2,2':6', 2''-Terpyridines. Chemistry 2016; 22:8215-33. [PMID: 27138194 DOI: 10.1002/chem.201505072] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 03/23/2016] [Indexed: 11/06/2022]
Abstract
The luminescent and mesomorphic properties of a series of metal complexes based on hexacatenar 2,2':6',2''-terpyridines are investigated using experimental methods and density functional theory (DFT). Two types of ligand are examined, namely 5,5''-di(3,4,5-trialkoxyphenyl)terpyridine with or without a fused cyclopentene ring on each pyridine and their complexes were prepared with the following transition metals: Zn(II) , Co(III) , Rh(III) , Ir(III) , Eu(III) and Dy(III) . The exact geometry of some of these complexes was determined by single X-ray diffraction. All complexes with long alkyl chains were found to be liquid crystalline, which property was induced on complexation. The liquid-crystalline behaviour of the complexes was studied by polarising optical microscopy and small-angle X-ray diffraction. Some of the transition metal complexes (for example, those with Zn(II) and Ir(III) ) are luminescent in solution, the solid state and the mesophase; their photophysical properties were studied both experimentally and using DFT methods (M06-2X and B3LYP).
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Affiliation(s)
- N S Saleesh Kumar
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
| | - Marsel Z Shafikov
- Department of TOS, Institute of Chemical Engineering, Ural Federal University, 19 Mira str., Ekaterinburg, 620002, Russia
| | - Adrian C Whitwood
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
| | - Bertrand Donnio
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS-Université de Strasbourg (UMR 7504), 23 rue du Loess BP 43, 67034, Strasbourg Cedex 2, France
| | - Peter B Karadakov
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
| | - Valery N Kozhevnikov
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.,Department of Applied Sciences, Northumbria University, Newcastle-Upon-Tyne, NE1 8ST, UK
| | - Duncan W Bruce
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.
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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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Shao JY, Zhong YW. Monometallic osmium(II) complexes with bis(N-methylbenzimidazolyl)benzene or -pyridine: a comparison study with ruthenium(II) analogues. Inorg Chem 2013; 52:6464-72. [PMID: 23688019 DOI: 10.1021/ic400385b] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Seven bis-tridentate osmium complexes with Mebib or Mebip (Mebib is the 2-deprotonated form of 1,3-bis(N-methylbenzimidazolyl)benzene and Mebip is bis(N-methylbenzimidazolyl)pyridine) have been prepared, and their electrochemical and spectroscopic properties are compared with ruthenium structural analogues. Among them, four complexes have the [Os(NCN)(NNN)]-type coordination, including [Os(Mebib)(Mebip)](PF6)2 (1(PF6)2), [Os(dpb)(Mebip)](PF6) (2(PF6), dpb is the 2-deprotonated form of 1,3-di(pyrid-2-yl)benzene), [Os(Mebib)(ttpy)](PF6) (3(PF6), ttpy = 4'-tolyl-2,2':6',2"-terpyridine), and [Os(dpb)(ttpy)](PF6) (4(PF6)). The other three complexes are [Os(Mebip)2](PF6)2 (5(PF6)2), [Os(Mebip)(tpy)](PF6)2 (6(PF6)2, tpy = 2,2':6',2"-terpyridine), and [Os(ttpy)2](PF6)2 (7(PF6)2) with the [Os(NNN)(NNN)]-type coordination. Single crystals of 2(PF6) and 6(PF6)2 have been obtained, and their structures are studied by X-ray crystallographic analysis. The Os(II/III) redox potentials of 1(PF6)2 to 7(PF6)2 progressively increase from +0.04, +0.23, +0.24, +0.36, +0.56, +0.79 to +0.94 V vs Ag/AgCl, which are 200-300 mV less positive relative to the Ru(II/III) potentials of their ruthenium counterparts. The highest occupied molecular orbital energy levels of 1(+)-7(2+) are calculated to vary in a descending order. The ruthenium and osmium complexes have singlet metal-to-ligand charge-transfer (MLCT) transitions of similar energies and band shapes, while the osmium complexes display additional (3)MLCT transitions in the lower-energy region. Complexes 6(PF6)2 and 7(PF6)2 emit weakly at 780 and 740 nm, respectively. Complex 1(PF6)2 was synthesized as the oxidized Os(III) salt because of the low Os(II/III) potential. The transformation of 1(2+) to 1(+) by chemical reduction or electrolysis led to the emergence of the (1)MLCT transitions in the visible region.
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Affiliation(s)
- Jiang-Yang Shao
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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Implementing Liquid-Crystalline Properties in Single-Stranded Dinuclear Lanthanide Helicates. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300176] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Ren Y, Ma H, Fu F, Zhang Z, Zhang Y. Crystal Structures and Luminescent Properties of Two Lanthanide(III) Complexes Featuring Double-Stranded Helical Chains of Based on 2-Sulfoterephthalate. J Inorg Organomet Polym Mater 2013. [DOI: 10.1007/s10904-013-9827-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Samanta K, Sarkar AK, Kar GK. Pyrolysis of Calcium Salt of Alkoxybenzoic Acids Fails to Produce Diarylketones: An Unusual Observation. SYNTHETIC COMMUN 2013. [DOI: 10.1080/00397911.2011.599195] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Xu HY, Zhao FH, Che YX, Zheng JM. Three 3d–4f heterometallic complexes constructed from oxalic acid and benzimidazole-5,6-dicarboxylic acid. CrystEngComm 2012. [DOI: 10.1039/c2ce25859e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Yang WW, Zhong YW, Yoshikawa S, Shao JY, Masaoka S, Sakai K, Yao J, Haga MA. Tuning of Redox Potentials by Introducing a Cyclometalated Bond to Bis-tridentate Ruthenium(II) Complexes Bearing Bis(N-methylbenzimidazolyl)benzene or -pyridine Ligands. Inorg Chem 2011; 51:890-9. [DOI: 10.1021/ic2016885] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wen-Wen Yang
- Beijing National Laboratory
for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Yu-Wu Zhong
- Beijing National Laboratory
for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Shinpei Yoshikawa
- Department of Applied
Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551,
Japan
| | - Jiang-Yang Shao
- Beijing National Laboratory
for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Shigeyuki Masaoka
- Department
of Chemistry, Faculty of Science, Kyushu University, Hakozaki 6-10-1, Higashi-ku, Fukuoka 812-8581,
Japan
| | - Ken Sakai
- Department
of Chemistry, Faculty of Science, Kyushu University, Hakozaki 6-10-1, Higashi-ku, Fukuoka 812-8581,
Japan
| | - Jiannian Yao
- Beijing National Laboratory
for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Masa-aki Haga
- Department of Applied
Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551,
Japan
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Axenov KV, Laschat S. Thermotropic Ionic Liquid Crystals. MATERIALS 2011; 4:206-259. [PMID: 28879986 PMCID: PMC5448481 DOI: 10.3390/ma4010206] [Citation(s) in RCA: 273] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Accepted: 12/27/2010] [Indexed: 12/26/2022]
Abstract
The last five years’ achievements in the synthesis and investigation of thermotropic ionic liquid crystals are reviewed. The present review describes the mesomorphic properties displayed by organic, as well as metal-containing ionic mesogens. In addition, a short overview on the ionic polymer and self-assembled liquid crystals is given. Potential and actual applications of ionic mesogens are also discussed.
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Affiliation(s)
- Kirill V Axenov
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany.
| | - Sabine Laschat
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany.
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Escande A, Guénée L, Terazzi E, Jensen TB, Nozary H, Piguet C. Enthalpy/Entropy Compensation in the Melting of Thermotropic Nitrogen-Containing Chelating Ligands and Their Lanthanide Complexes: Successes and Failures. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.200901190] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Keith C, Prehm M, Panarin YP, Vij JK, Tschierske C. Development of polar order in liquid crystalline phases of a banana compound with a unique sequence of three orthogonal phases. Chem Commun (Camb) 2010; 46:3702-4. [DOI: 10.1039/c001736a] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Eliseeva SV, Bünzli JCG. Lanthanide luminescence for functional materials and bio-sciences. Chem Soc Rev 2010; 39:189-227. [PMID: 20023849 DOI: 10.1039/b905604c] [Citation(s) in RCA: 2126] [Impact Index Per Article: 151.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Svetlana V Eliseeva
- Laboratory of Lanthanide Supramolecular Chemistry, Swiss Federal Institute of Technology, Lausanne (EPFL)
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Escande A, Guénée L, Buchwalder KL, Piguet C. Complexation of trivalent lanthanides with planar tridentate aromatic ligands tuned by counteranions and steric constraints. Inorg Chem 2009; 48:1132-47. [PMID: 19133740 DOI: 10.1021/ic801908c] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Among the plethora of parameters controlling the stability and structures of lanthanide coordination complexes, it is often difficult to decipher their relative importance in the global complexation processes. The combination of the bond valence method (for analyzing solid state structures) with the thermodynamic site binding model (for unravelling complexation reactions occurring in solution) appears to be an efficient tool for specifically addressing interligand effects, which affect the output of the coordination process. When applied to the reaction of the tridentate aromatic scaffolds 2,2':6',2''-terpyridine (L1) and 2,6-bis(benzimidazol-2-yl)pyridine (L2) with trivalent lanthanides, Ln(III), we demonstrate that the successive fixation of ligands, eventually leading to the triple-helical complexes [Ln(Lk)3]3+, is anticooperative both in the solid state and in solution, with a special sensitivity to the nature of the counteranion and to the peripheral substitution for L2. Consequently, in addition to the classical entropic driving forces resulting from the use of specific metal/ligand ratio, the stoichiometry of the final complex can be tuned by a judicious choice of interligand interactions, as exemplified by the unusual isolation of stable complexes with Ln/L = 2:3 ratios.
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Affiliation(s)
- Aude Escande
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
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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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Judele R, Dix MJ, Laschat S, Baro A, Nimtz M, Menzel D, Schoenes J, Doll K, Zwicknagl G, Niemeyer M. Synthesis and Magnetic Properties of Novel Azamacrocyclic LnIII, CuII, FeIII, and SrII Complexes and Conformational Analysis of the Ligands. Z Anorg Allg Chem 2008. [DOI: 10.1002/zaac.200700394] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Escande A, Guénée L, Nozary H, Bernardinelli G, Gumy F, Aebischer A, Bünzli JCG, Donnio B, Guillon D, Piguet C. Rational Tuning of Melting Entropies for Designing Luminescent Lanthanide-Containing Thermotropic Liquid Crystals at Room Temperature. Chemistry 2007; 13:8696-713. [PMID: 17665377 DOI: 10.1002/chem.200700560] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The connection of twelve peripheral and divergent dodecyloxy chains to a central tridentate aromatic binding unit provides the dodecacatenar ligand L11, for which room-temperature mesomorphism is detected. An enthalpically unbalanced large melting entropy (DeltaSmL11=226 J mol(-1) K(-1)) results from the programmed microsegregation induced in the crystalline phase, a phenomenon which is maintained in the associated lanthanide complexes [Ln(L11)(NO3)3] and [Ln(L11)(CF3CO2)3]2. Low-temperature melting processes (-43<or=Tm<or=-25 degrees C) producing room-temperature hexagonal columnar liquid-crystalline phases thus result for these novel lanthanidomesogens. A combined photophysical (high-resolution emission spectroscopy), thermodynamic (differential scanning calorimetry, DSC) and structural (small-angle X-ray diffraction, SA-XRD) investigation of the melting process shows minor structural changes occurring between the crystal (Cr) and the hexagonal columnar mesophase (Colh) in the complexes, which allows the assignment of the existence of these unusual first-order phase transitions to the negligible mixing entropy produced by the two viscous phases at low temperature. Extension of the concept of chemical tuning of melting entropies for the global design of room-temperature metallomesogens and liquid crystals is discussed.
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Affiliation(s)
- Aude Escande
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, -1211 Geneva 4, Switzerland
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