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NIR-emission from Yb(III)- and Nd(III)-based complexes in the solid state sensitized by a ligand system absorbing in a broad UV and visible spectral window. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100388] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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2
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Korshunov VM, Metlin MT, Ambrozevich SA, Golovanov IS, Gontcharenko VE, Selyukov AS, Taydakov IV. Impact of ligand-centered excited states on luminescence sensitization in Pr 3+ complexes with β-diketones. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 260:119863. [PMID: 34030034 DOI: 10.1016/j.saa.2021.119863] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 03/17/2021] [Accepted: 04/18/2021] [Indexed: 06/12/2023]
Abstract
In this study, two novel Pr3+ complexes with different 1,3-diketonate ligands were synthesized and investigated. To study the effect of the ancillary ligand on the energy transfer mechanisms in the complexes, a phenanthroline ligand was introduced. To take into account the influence of the ligand environment composed of different ligands on the energy transfer and relaxation processes, we compared the synthesized compounds with a similar complex containing the phenanthroline ligand. The spectroscopic studies in the visible and near-infrared spectral regions were supplemented with DFT and TD-DFT calculations. We found two ligand-to-ligand charge transfer (LLCT) states, with one state corresponding to energy transfer between 1,3-diketones and the other - to energy transfer from the 1,3-diketone to the phenanthroline motif. It was demonstrated that optical excitation via the latter channel leads to a fourfold increase in the luminescence quantum yield as compared with excitation via the π-π∗ transitions in 1,3-diketones. Moreover, both LLCT states provide sensitization of the Pr3+ luminescence involving the 3P0 and 3P1 levels.
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Affiliation(s)
- V M Korshunov
- P.N.Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninsky Prospect, 119991 Moscow, Russia; Bauman Moscow State Technical University, 5/1 2-ya Baumanskaya Str., 105005 Moscow, Russia.
| | - M T Metlin
- P.N.Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninsky Prospect, 119991 Moscow, Russia; Bauman Moscow State Technical University, 5/1 2-ya Baumanskaya Str., 105005 Moscow, Russia
| | - S A Ambrozevich
- P.N.Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninsky Prospect, 119991 Moscow, Russia
| | - I S Golovanov
- N.D.Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, 119991 Moscow, Russia
| | | | - A S Selyukov
- P.N.Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninsky Prospect, 119991 Moscow, Russia
| | - I V Taydakov
- P.N.Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninsky Prospect, 119991 Moscow, Russia; Plekhanov Russian University of Economics, Stremyanny lane, 36, 117997 Moscow, Russia.
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Luminescent Ln-Ionic Liquids beyond Europium. Molecules 2021; 26:molecules26164834. [PMID: 34443420 PMCID: PMC8400174 DOI: 10.3390/molecules26164834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 08/02/2021] [Accepted: 08/05/2021] [Indexed: 12/03/2022] Open
Abstract
Searching in the Web of Knowledge for “ionic liquids” AND “luminescence” AND “lanthanide”, around 260 entries can be found, of which a considerable number refer solely or primarily to europium (90%, ~234). Europium has been deemed the best lanthanide for luminescent applications, mainly due to its efficiency in sensitization, longest decay times, and the ability to use its luminescence spectra to probe the coordination geometry around the metal. The remaining lanthanides can also be of crucial importance due to their different colors, sensitivity, and capability as probes. In this manuscript, we intend to shed some light on the existing published work on the remaining lanthanides. In some cases, they appear in papers with europium, but frequently in a subordinate position, and in fewer cases then the main protagonist of the study. All of them will be assessed and presented in a concise manner; they will be divided into two main categories: lanthanide compounds dissolved in ionic liquids, and lanthanide-based ionic liquids. Finally, some analysis of future trends is carried out highlighting some future promising fields, such as ionogels.
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De Rosa C, Melchior A, Sanadar M, Tolazzi M, Duerkop A, Piccinelli F. Isoquinoline-based Eu(iii) luminescent probes for citrate sensing in complex matrix. Dalton Trans 2021; 50:4700-4712. [PMID: 33729252 DOI: 10.1039/d1dt00511a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A neutral Eu(iii) complex containing the S,S enantiomer of isoQC3A3- ligand (isoQC3A3- = N-isoquinolyl-N,N',N'-trans-l,2-cyclohexylenediaminetriacetate) was synthesized and characterized. The complex was spectroscopically investigated and the results compared with those obtained for the similar bis-anionic ligand bisoQcd2- (bisoQcd2- = N,N'-bis(2-isoquinolinmethyl)-trans-1,2-diaminocyclohexane N,N'-diacetate). Both Eu(iii)-complexes show similar binding constants upon titration with the main analytes contained in interstitial extracellular fluid (i.e. hydrogen carbonate, serum albumin and citrate). However, the analyte affinity is accompanied by different enhancements of the Eu(iii) intrinsic quantum yield (QY). Structures and hydration numbers of the complexes are determined by luminescence decay measurements and DFT calculations. The QYs as well as the binding constants of the individual adducts of the complexes with hydrogen carbonate, bovine serum albumin (BSA) and citrate are determined. The study of the Eu(iii) emission upon the systematic variation of one analyte in a complex mixture has been carried out to predict the performance of the luminescent sensor in conditions close to the real extracellular environment. Both Eu(iii) complexes can detect citrate at extracellular concentrations up to 500 μM, even at millimolar concentrations of the other interfering species. In the case of the Eu(bisoQcd)OTf complex, an increase of 23% of the Eu(iii) luminescence intensity at 615 nm upon addition of 0.3 mM of citrate was recorded. This feature makes the latter complex a viable probe for luminescence analysis of citrate in a complex matrix.
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Affiliation(s)
- Chiara De Rosa
- Luminescent Materials Laboratory, DB, Università di Verona, and INSTM, UdR Verona, Strada Le Grazie 15, 37134 Verona, Italy.
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Okamura H, Hirayama N. Recent Progress in Ionic Liquid Extraction for the Separation of Rare Earth Elements. ANAL SCI 2021; 37:119-130. [PMID: 33100311 DOI: 10.2116/analsci.20sar11] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This review summarizes recent progress in solvent extraction of rare earth elements (REEs) using an ionic liquid (IL) as the extraction solvent. These IL extraction systems are advantageous owing to the affinity of ILs for both charged and neutral hydrophobic species, in contrast to conventional organic solvent extraction systems. Herein, REE extraction studies using ILs are detailed and classified based on the type of extraction system, namely extraction using anionic ligands, extraction using neutral ligands, synergistic extraction, extraction without extractants, and a specific system using task-specific ionic liquids (TSILs). In IL extraction systems, the extracted complexes are often different from those in organic solvent systems, and the REE extraction and separation efficiencies are often significantly enhanced. Synergistic IL extraction is an effective approach to improving the extractability and separability of REEs. The development of novel TSILs suitable for IL extraction systems is also effective for REE separation.
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Affiliation(s)
- Hiroyuki Okamura
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan.
| | - Naoki Hirayama
- Department of Chemistry, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi, 274-8510, Japan
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6
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De Rosa C, Melchior A, Sanadar M, Tolazzi M, Giorgetti A, Ribeiro RP, Nardon C, Piccinelli F. Effect of the Heteroaromatic Antenna on the Binding of Chiral Eu(III) Complexes to Bovine Serum Albumin. Inorg Chem 2020; 59:12564-12577. [PMID: 32806003 PMCID: PMC8009522 DOI: 10.1021/acs.inorgchem.0c01663] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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The cationic enantiopure
(R,R) and luminescent Eu(III) complex [Eu(bisoQcd)(H2O)2] OTf (with bisoQcd = N,N′-bis(2-isoquinolinmethyl)-trans-1,2-diaminocyclohexane N,N′-diacetate and OTf = triflate) was synthesized
and characterized. At physiological pH, the 1:1 [Eu(bisoQcd)(H2O)2]+ species, possessing
two water molecules in the inner coordination sphere, is largely dominant.
The interaction with bovine serum albumin (BSA) was studied by means
of several experimental techniques, such as luminescence spectroscopy,
isothermal titration calorimetry (ITC), molecular docking (MD), and
molecular dynamics simulations (MDS). In this direction, a ligand
competition study was also performed by using three clinically established
drugs (i.e., ibuprofen, warfarin, and digitoxin). The nature of this
interaction is strongly affected by the type of the involved heteroaromatic
antenna in the Eu(III) complexes. In fact, the presence of isoquinoline rings drives the corresponding complex toward
the protein superficial area containing the tryptophan residue 134
(Trp134). As the main consequence, the metal center undergoes the
loss of one water molecule upon interaction with the side chain of
a glutamic acid residue. On the other hand, the similar complex containing
pyridine rings ([Eu(bpcd)(H2O)2]Cl with bpcd
= N,N′-bis(2-pyridylmethyl)-trans-1,2-diaminocyclohexane N,N′-diacetate) interacts more weakly with the protein
in a different superficial cavity, without losing the coordinated
water molecules. The effect
of the antenna moiety on the interaction of two new luminescent Eu(III)
complexes with BSA was studied. Results show that the complexes can
be conveniently exploited as optical probes for albumin serum proteins
by means of opposite mechanisms (switch-on−off of the luminescent
signal).
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Affiliation(s)
- Chiara De Rosa
- Luminescent Materials Laboratory, Department of Biotechnology, University of Verona and INSTM - UdR Verona, Strada Le Grazie 15, 37134 Verona, Italy
| | - Andrea Melchior
- Laboratory of Chemical Technologies, Polytechnic Department of Engineering and Architecture, University of Udine, via Cotonificio 108, 33100 Udine, Italy
| | - Martina Sanadar
- Laboratory of Chemical Technologies, Polytechnic Department of Engineering and Architecture, University of Udine, via Cotonificio 108, 33100 Udine, Italy
| | - Marilena Tolazzi
- Laboratory of Chemical Technologies, Polytechnic Department of Engineering and Architecture, University of Udine, via Cotonificio 108, 33100 Udine, Italy
| | - Alejandro Giorgetti
- Applied Bioinformatics Laboratory, Department of Biotechnology, University of Verona, Strada Le Grazie 15, 37134 Verona, Italy
| | - Rui P Ribeiro
- Applied Bioinformatics Laboratory, Department of Biotechnology, University of Verona, Strada Le Grazie 15, 37134 Verona, Italy
| | - Chiara Nardon
- Luminescent Materials Laboratory, Department of Biotechnology, University of Verona and INSTM - UdR Verona, Strada Le Grazie 15, 37134 Verona, Italy
| | - Fabio Piccinelli
- Luminescent Materials Laboratory, Department of Biotechnology, University of Verona and INSTM - UdR Verona, Strada Le Grazie 15, 37134 Verona, Italy
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7
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Zhao Y, Wang A, Kang J, Chu H, Zhang H, Zhao Y. Factors affecting the metal-enhanced luminescence of lanthanide complexes by Ag@SiO2 nanoparticles. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112678] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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8
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Tang SF, Smetana V, Mishra MK, Kelley SP, Renier O, Rogers RD, Mudring AV. Forcing Dicyanamide Coordination to f-Elements by Dissolution in Dicyanamide-Based Ionic Liquids. Inorg Chem 2020; 59:7227-7237. [PMID: 32364712 PMCID: PMC7304860 DOI: 10.1021/acs.inorgchem.0c00667] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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A robust general
route to lanthanide dicyanamide (DCA–) complexes
has been developed where f-element salts are dissolved
in DCA–-based ionic liquids (ILs) directly or formed in situ, forcing coordination of these normally weakly coordinating
soft N-donor anions, even in an ambient, non-moisture-excluding environment.
A series of lanthanide complexes [C2mim][Ln(DCA)4(H2O)4] (C2mim = 1-ethyl-3-methylimidazolium;
Ln = La, Nd, Eu, Tb, Dy, and Yb) and [C2mim]3n[La(OH2)4(μ2-DCA)4]n[La(OH2)2(μ3-DCA)3(μ2-DCA)4]2n(Cl)4n were
crystallized under a variety of conditions using this methodology
and structurally characterized using single crystal X-ray diffraction.
Although not all examples were isostructural, the dominant feature
across the series was the presence of [Ln(DCA)4(H2O)4]− anionic nodes with all terminal
DCA– ligands accepting hydrogen bonds from the coordinated
water molecules forming a 3D metal organic framework. To determine
if any structural clues might aid in the further development of the
synthetic methodology, the metal-free IL [C1mim][DCA] (C1mim = 1,3-dimethylimidazolium), a room-temperature solid,
crystalline analogue of the reaction IL, which is liquid at room temperature,
was also prepared and structurally characterized. The ready isolation
of these compounds allowed us to begin an investigation of the physical
properties such as the luminescence at room and low temperatures for
the Eu, Tb, and Dy representatives. Direct dissolution
of lanthanide chloride hydrates in the
DCA− ionic liquids leads to coordination of DCA− anions to Ln3+ under full displacement
of chloride and partial displacement of water ligands leading to the
formation of metal organic frameworks under ambient conditions. X-ray
analyses reveal a significant influence of the hydrogen bonding and
lanthanides’ size on crystallographic disorder in their crystal
structures.
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Affiliation(s)
- Si-Fu Tang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Changcheng Road 700, Chengyang District, Qingdao 266109, China
| | - Volodymyr Smetana
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16 C, 10691 Stockholm, Sweden
| | - Manish Kumar Mishra
- College of Arts & Sciences, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487, United States
| | - Steven P Kelley
- College of Arts & Sciences, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487, United States
| | - Olivier Renier
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16 C, 10691 Stockholm, Sweden
| | - Robin D Rogers
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16 C, 10691 Stockholm, Sweden.,College of Arts & Sciences, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487, United States
| | - Anja-Verena Mudring
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16 C, 10691 Stockholm, Sweden
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Li Q, Qiu J, Liu H, Chen X. A luminescent lyotropic liquid crystal with UV irradiation induced photochromism. SOFT MATTER 2020; 16:1170-1178. [PMID: 31934710 DOI: 10.1039/c9sm02366f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Multicolored photoluminescence induced by UV irradiation in soft materials has invaluable potential in display and detection applications. Here, an ionic liquid (ethylammonium nitrate, EAN)-mediated luminescent lyotropic liquid crystal (LLC) has been fabricated, where an europium complex with two ligands (Eu(DBM)3BQ, DBM = dibenzoylmethane and BQ = 2,2'-biquinoline) was doped. The obtained LLC exhibited enhanced fluorescence intensity and lifetime compared to those of Eu(DBM)3BQ in EAN solution. Interestingly, the luminescent LLC color from the initial red emission of the complex was changed gradually to green when the UV exposure was extended. Though the DBM ligand displayed the typical photo-degradation, the emission intensity of BQ increased drastically. A mechanism based on an UV-induced trans-to-cis isomerization of BQ was proposed to explain such an unusual luminescence phenomenon. Both the experimental and computational results indicated an intra ligand charge transfer (ILCT) accompanied with the BQ isomerization under continuous UV irradiation, which resulted in the enhanced green light emission. The results obtained here are referable for better understanding the interplay between weak interactions and modulation of novel lanthanide-based photochromism systems under UV exposure.
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Affiliation(s)
- Qingrun Li
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan, 250100, China.
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Piccinelli F, De Rosa C, Melchior A, Faura G, Tolazzi M, Bettinelli M. Eu(iii) and Tb(iii) complexes of 6-fold coordinating ligands showing high affinity for the hydrogen carbonate ion: a spectroscopic and thermodynamic study. Dalton Trans 2019; 48:1202-1216. [PMID: 30460363 DOI: 10.1039/c8dt03621g] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
In the present contribution, four classes of Ln(iii) complexes (Ln = Eu and Tb) have been synthesized and characterized in aqueous solution. They differ by charge, Ln(bpcd)+ [bpcd2- = N,N'-bis(2-pyridylmethyl)-trans-1,2-diaminocyclohexane N,N'-diacetate] and Ln(bQcd)+ (bQcd2- = N,N'-bis(2-quinolinmethyl)-trans-1,2-diaminocyclohexane N,N'-diacetate) being positively charged and Ln(PyC3A) (PyC3A3- = N-picolyl-N,N',N'-trans-l,2-cyclohexylenediaminetriacetate) and Ln(QC3A) (QC3A3- = N-quinolyl-N,N',N'-trans-l,2-cyclohexylenediaminetriacetate) being neutral. Combined DFT, spectrophotometric and potentiometric studies reveal the presence, under physiological conditions (pH 7.4), of a couple of equally and highly stable isomers differing by the stereochemistry of the ligands (trans-N,N and trans-O,O for bpcd2- and bQcd2-; trans-O,O and trans-N,O for PyC3A3- and QC3A3-). Their high log β values (9.97 < log β < 15.68), the presence of an efficient antenna effect and the strong increase of the Ln(iii) luminescence intensity as a function of the hydrogen carbonate concentration in physiological solution, render these complexes as very promising optical probes for a selective detection of HCO3-in cellulo or in extracellular fluid. This particularly applies to the cationic Eu(bpcd)+, Tb(bpcd)+ and Eu(bQcd)+ complexes, which are capable of guesting up to two hydrogen carbonate anions in the inner coordination sphere of the metal ion, so that they show an unprecedented affinity towards HCO3- (log K for the formation of the adduct in the 4.6-5.9 range).
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Affiliation(s)
- Fabio Piccinelli
- Laboratorio Materiali Luminescenti, DB, Università di Verona, and INSTM, UdR Verona, Strada Le Grazie 15, 37134 Verona, Italy.
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11
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Kreidt E, Kruck C, Seitz M. Nonradiative Deactivation of Lanthanoid Luminescence by Multiphonon Relaxation in Molecular Complexes. INCLUDING ACTINIDES 2018. [DOI: 10.1016/bs.hpcre.2018.04.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Okamura H, Aoyagi N, Shimojo K, Naganawa H, Imura H. Role of Tf2N− anions in the ionic liquid–water distribution of europium(iii) chelates. RSC Adv 2017. [DOI: 10.1039/c6ra27208h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The replacement of water molecules of [Eu(tta)3(H2O)3] with Tf2N− was evidenced in water-saturated [Cnmim][Tf2N] by time-resolved laser-induced fluorescence spectroscopy.
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Affiliation(s)
- Hiroyuki Okamura
- Advanced Science Research Center
- Japan Atomic Energy Agency
- Tokai
- Japan
| | - Noboru Aoyagi
- Nuclear Science and Engineering Center
- Japan Atomic Energy Agency
- Tokai
- Japan
| | - Kojiro Shimojo
- Advanced Science Research Center
- Japan Atomic Energy Agency
- Tokai
- Japan
| | | | - Hisanori Imura
- Faculty of Chemistry
- Institute of Science and Engineering
- Kanazawa University
- Kanazawa 920-1192
- Japan
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Zercher B, Hopkins TA. Induction of Circularly Polarized Luminescence from Europium by Amino Acid Based Ionic Liquids. Inorg Chem 2016; 55:10899-10906. [DOI: 10.1021/acs.inorgchem.6b01343] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ben Zercher
- Department of Chemistry, Butler University, 4600 Sunset Avenue, Indianapolis, Indiana 46208, United States
| | - Todd A. Hopkins
- Department of Chemistry, Butler University, 4600 Sunset Avenue, Indianapolis, Indiana 46208, United States
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Devi R, Bala M, Khatkar S, Taxak V, Boora P. Investigations of luminescent behavior and intramolecular energy transfer mechanism of europium(III) complexes with fluorinated β-ketoester ligand. J Fluor Chem 2016. [DOI: 10.1016/j.jfluchem.2015.11.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Bala M, Kumar S, Taxak V, Boora P, Khatkar S. Synthesis, photoluminescent features and intramolecular energy transfer mechanism of europium (III) complexes with fluorinate β-diketone ligand and auxiliary ligands. J Fluor Chem 2015. [DOI: 10.1016/j.jfluchem.2015.06.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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16
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17
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18
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Rout A, Binnemans K. Influence of the ionic liquid cation on the solvent extraction of trivalent rare-earth ions by mixtures of Cyanex 923 and ionic liquids. Dalton Trans 2015; 44:1379-87. [PMID: 25423581 DOI: 10.1039/c4dt02766c] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Trivalent rare-earth ions were extracted from nitric acid medium by the neutral phosphine oxide extractant Cyanex 923 into ionic liquid phases containing the bis(trifluoromethylsulfonyl)imide anion. Five different cations were considered: 1-butyl-3-methylimidazolium, 1-decyl-3-methylimidazolium, methyltributylammonium, methyltrioctylammonium and trihexyl(tetradecyl)phosphonium. The extraction behavior of neodymium(iii) was investigated as a function of various parameters: pH, extractant concentration, concentration of the neodymium(iii) ion in the aqueous feed and concentration of the salting-out agent. The loading capacity of the ionic liquid phase was studied. The extraction efficiency increased with increasing pH of the aqueous feed solution. The extraction occurred for all ionic liquids via an ion-exchange mechanism and the extraction efficiency could be related to the solubility of the ionic liquid cation in the aqueous phase: high distribution ratios for hydrophilic cations and low ones for hydrophobic cations. Addition of nitrate ions to the aqueous phase resulted in an increase in extraction efficiency for ionic liquids with hydrophobic cations due to extraction of neutral complexes. Neodymium(iii) could be stripped from the ionic liquid phase by 0.5-1.0 M nitric acid solutions and the extracting phase could be reused. The extractability of other rare earths present in the mixture was compared for the five ionic liquids.
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Affiliation(s)
- Alok Rout
- KU Leuven, Department of Chemistry, Celestijnenlaan 200F, P. O. Box 2404, B-3001 Heverlee, Belgium.
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19
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Yi S, Wang J, Chen X. Enhanced energy transfer efficiency and stability of europium β-diketonate complex in ionic liquid-based lyotropic liquid crystals. Phys Chem Chem Phys 2015; 17:20322-30. [PMID: 26190789 DOI: 10.1039/c5cp03659c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The self-assembly of luminescent lyotropic liquid crystals with europium β-diketonate complex confined within via hydrogen bonds between P123 and imidazolium cations is demonstrated.
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Affiliation(s)
- Sijing Yi
- Key Laboratory of Colloid and Interface Chemistry
- Shandong University
- Ministry of Education
- Jinan
- China
| | - Jiao Wang
- Key Laboratory of Colloid and Interface Chemistry
- Shandong University
- Ministry of Education
- Jinan
- China
| | - Xiao Chen
- Key Laboratory of Colloid and Interface Chemistry
- Shandong University
- Ministry of Education
- Jinan
- China
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20
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Tang SF, Lorbeer C, Wang X, Ghosh P, Mudring AV. Highly Luminescent Salts Containing Well-Shielded Lanthanide-Centered Complex Anions and Bulky Imidazolium Countercations. Inorg Chem 2014; 53:9027-35. [DOI: 10.1021/ic500979p] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Si-Fu Tang
- Key Laboratory of Biofuel, Chinese Academy of Sciences, Qingdao Institute of Bioenergy and Bioprocess Technology, 266101 Qingdao, China
| | - Chantal Lorbeer
- Anorganische Chemie
III−Festkörperchemie und Materialien, Ruhr-Universität Bochum, 44801 Bochum, Germany
| | - Xinjiao Wang
- Anorganische Chemie
III−Festkörperchemie und Materialien, Ruhr-Universität Bochum, 44801 Bochum, Germany
| | - Pushpal Ghosh
- Anorganische Chemie
III−Festkörperchemie und Materialien, Ruhr-Universität Bochum, 44801 Bochum, Germany
- School of Chemical Science and Technology, Department of Chemistry, Dr. H. S. Gour University (A Central University), Sagar, 470003 Madhya Pradesh India
| | - Anja-Verena Mudring
- Anorganische Chemie
III−Festkörperchemie und Materialien, Ruhr-Universität Bochum, 44801 Bochum, Germany
- Materials
Science and Engineering, Iowa State University, Ames, Iowa 50014, United States
- Critical
Materials Institute, Ames Laboratory, Ames, Iowa 50011, United States
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Han Y, Lin C, Meng Q, Dai F, Sykes AG, Berry MT, May PS. (BMI)3LnCl6 Crystals as Models for the Coordination Environment of LnCl3 (Ln = Sm, Eu, Dy, Er, Yb) in 1-Butyl-3-methylimidazolium Chloride Ionic-Liquid Solution. Inorg Chem 2014; 53:5494-501. [DOI: 10.1021/ic500101x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yulun Han
- Department
of Chemistry, University of South Dakota, 414 East Clark Street, Vermillion, South Dakota 57069, United States
| | - Cuikun Lin
- Department
of Chemistry, University of South Dakota, 414 East Clark Street, Vermillion, South Dakota 57069, United States
| | - Qingguo Meng
- Department
of Chemistry, University of South Dakota, 414 East Clark Street, Vermillion, South Dakota 57069, United States
| | - Fengrong Dai
- Department
of Chemistry, University of South Dakota, 414 East Clark Street, Vermillion, South Dakota 57069, United States
| | - Andrew G. Sykes
- Department
of Chemistry, University of South Dakota, 414 East Clark Street, Vermillion, South Dakota 57069, United States
| | - Mary T. Berry
- Department
of Chemistry, University of South Dakota, 414 East Clark Street, Vermillion, South Dakota 57069, United States
| | - P. Stanley May
- Department
of Chemistry, University of South Dakota, 414 East Clark Street, Vermillion, South Dakota 57069, United States
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Yue B, Chen YN, Chu HB, Qu YR, Wang AL, Zhao YL. Synthesis, crystal structures and fluorescence properties of dinuclear Tb(III) and Sm(III) complexes with 2,4,6-tri(2-pyridyl)-1,3,5-triazine and halogenated benzoic acid. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.01.024] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Doffek C, Wahsner J, Kreidt E, Seitz M. Breakdown of the Energy Gap Law in Molecular Lanthanoid Luminescence: The Smallest Energy Gap Is Not Universally Relevant for Nonradiative Deactivation. Inorg Chem 2014; 53:3263-5. [DOI: 10.1021/ic500017a] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Christine Doffek
- Department of Chemistry
and Biochemistry, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Jessica Wahsner
- Department of Chemistry
and Biochemistry, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Elisabeth Kreidt
- Department of Chemistry
and Biochemistry, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Michael Seitz
- Department of Chemistry
and Biochemistry, Ruhr-University Bochum, 44780 Bochum, Germany
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Liu L, Tian G, Rao L. Effect of Solvation? Complexation of Neodymium(III) with Nitrate in an Ionic Liquid (BumimTf2N) in Comparison with Water. SOLVENT EXTRACTION AND ION EXCHANGE 2013. [DOI: 10.1080/07366299.2013.800410] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Han Y, Dai F, Sykes AG, May PS, Berry MT, Meng Q, Lin C. catena-Poly[1-butyl-3-methyl-imidazolium [[dichlorido(methanol-κO)(propan-2-ol-κO)lanthanate(III)]-di-μ-chlorido]]. Acta Crystallogr Sect E Struct Rep Online 2012; 68:m292-3. [PMID: 22412437 PMCID: PMC3297247 DOI: 10.1107/s160053681200517x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Accepted: 02/06/2012] [Indexed: 11/17/2022]
Abstract
The title compound, (C8H15N2)[LaCl4(CH3OH)(C3H7OH)], consists of one 1-butyl-3-methylimidazolium (BMI+) cation and one hexahedral tetrachlorido(methanol)(propan-2-ol)lanthanate anion. The LaIII ion is eight-coordinate, with the LaIII ion bridged by a pair of Cl atoms, so forming chains propagating along the a-axis direction. Each LaIII ion is further coordinated by two isolated Cl atoms, one methanol and one propan-2-ol molecule. The coordinated methanol and propan-2-ol molecules of the anion form O—H⋯Cl hydrogen bonds with the Cl atoms of inversion-related anions. The BMI+ cation froms C—H⋯Cl hydrogen bonds with the Cl atoms of the anion. The anions are located in the C faces of the triclinic unit cell, with an inversion center in the middle of the La2Cl2 ring of the polymeric chain.
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Affiliation(s)
- Yulun Han
- Department of Chemistry, University of South Dakota, 414E Clark, CL115, Vermillion, SD 57069, USA
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