1
|
Egger C, Guénée L, Deorukhkar N, Piguet C. Programming heterometallic 4f-4f' helicates under thermodynamic control: the circle is complete. Dalton Trans 2024; 53:6050-6062. [PMID: 38470853 DOI: 10.1039/d4dt00610k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
Three non-symmetrical segmental ligand strands L4 can be wrapped around a linear sequence of one Zn2+ and two trivalent lanthanide cations Ln3+ to give quantitatively directional [ZnLn2(L4)3]8+ triple-stranded helicates in the solid state and in solution. NMR speciations in CD3CN show negligible decomplexation at a millimolar concentration and the latter helicate can be thus safely considered as a preorganized C3-symmetrical HHH-[(L43Zn)(LnA)(2-n)(LnB)n]8+ platform in which the thermodynamic properties of (i) lanthanide permutation between the central N9 and the terminal N6O3 binding sites and (ii) exchange processes between homo- and heterolanthanide helicates are easy to access (Ln = La, Eu, Lu). Deviations from statistical distributions could be programmed by exploiting specific site recognition and intermetallic pair interactions. Considering the challenging La3+ : Eu3+ ionic pair, for which the sizes of the two cations differ by only 8%, a remarkable excess (70%) of the heterolanthanide is produced, together with a preference for the formation of the isomer where the largest lanthanum cation lies in the central N9 site ([(La)(Eu)] : [(Eu)(La)] = 9 : 1). This rare design and its rational programming pave the way for the preparation of directional light-converters and/or molecular Q-bits at the (supra)molecular level.
Collapse
Affiliation(s)
- Charlotte Egger
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland.
| | - Laure Guénée
- Laboratory of Crystallography, University of Geneva, 24 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Neel Deorukhkar
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland.
| | - Claude Piguet
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland.
| |
Collapse
|
2
|
REY Patterns and Their Natural Anomalies in Waters and Brines: The Correlation of Gd and Y Anomalies. HYDROLOGY 2021. [DOI: 10.3390/hydrology8030116] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Rare earths and yttrium (REY) distribution patterns of the hydrosphere reveal systematic correlations of Gd and Y anomalies besides the non-correlated redox-dependent Ce and Eu anomalies. Eu anomalies are inherited by dissolution of feldspars in igneous rocks, whereas Ce, Gd and Y anomalies develop in aqueous systems in contact with minerals and amorphous matter. Natural, positive Gd and Y anomalies in REY patterns characterize high-salinity fluids from the Dead Sea, Israel/Jordan, the Great Salt Lake, USA, the Aral Sea, Kazakhstan/Uzbekistan, ground- and surface water worldwide. Extreme Gd anomalies mostly originate from anthropogenic sources. The correlation of Gd and Y anomalies at low temperature in water bodies differ from geothermal ones. In nature, dynamic systems prevail in which either solids settle in water columns or water moves through permeable sediments or sedimentary rocks. In both cases, the anomalies in water develop due to repeated equilibration with solid matter. Thus, these anomalies provide information about the hydrological history of seawater, fresh groundwater and continental brines. When migrating, the interaction of aqueous phases with mineral surfaces leads to increasing anomalies because the more hydrophillic Gd and Y preferentially remain in the aqueous phase compared to their nearest neighbors. The correlation coefficients between Gd and Y anomalies in groundwater is 0.5–0.9. In lakes and oceans, it is about 0.1–0.8, under anomalous conditions it can increase to 1.
Collapse
|
3
|
Shiery RC, Cooper KA, Cantu DC. Computational Prediction of All Lanthanide Aqua Ion Acidity Constants. Inorg Chem 2021; 60:10257-10266. [PMID: 34214391 DOI: 10.1021/acs.inorgchem.1c00662] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The protonation state of lanthanide-ligand complexes, or lanthanide-containing porous materials, with many Brønsted acid sites can change due to proton loss/gain reactions with water or other heteroatom-containing compounds. Consequently, variations in the protonation state of lanthanide-containing species affect their molecular structure and desired properties. Lanthanide(III) aqua ions undergo hydrolysis and form hydroxides; they are the best characterized lanthanide-containing species with multiple Brønsted acid sites. We employed constrained ab initio molecular dynamics simulations and electronic structure calculations to determine all acidity constants of the lanthanide(III) aqua ions solely from computation. The first, second, and third acidity constants of lanthanide(III) aqua ions were predicted, on average, within 1.2, 2.5, and 4.7 absolute pKa units from experiment, respectively. A table includes our predicted pKa values alongside most experimentally measured pKa values known to date. The approach presented is particularly suitable to determine the Brønsted acidity of lanthanide-containing systems with multiple acidic sites, including those whose measured acidity constants cannot be linked to specific acid sites.
Collapse
Affiliation(s)
- Richard C Shiery
- Department of Chemical and Materials Engineering, University of Nevada, Reno, Reno, Nevada 89557, United States
| | - Kyle A Cooper
- Department of Chemical and Materials Engineering, University of Nevada, Reno, Reno, Nevada 89557, United States
| | - David C Cantu
- Department of Chemical and Materials Engineering, University of Nevada, Reno, Reno, Nevada 89557, United States
| |
Collapse
|
4
|
Abstract
AbstractThe totally symmetric stretching mode $$\nu_{1}$$ν1 Ln–(OH2) of the first hydration shells of all the rare earth (RE) ions across the series from lanthanum to lutetium has been measured on dilute aqueous perchlorate solutions at room temperature. An S-shaped relationship has been found between the $$\nu_{1}$$ν1 Ln–(OH2) peak positions and the Ln–(OH2) bond distances of the lanthanide(III) aqua ions. While the light rare earth ions form nona-hydrates, the heavy ones form octa-hydrates and the rare earth ions in the middle of the series show non integer hydration numbers between 9 and 8. A relationship between wavenumber positions $$\nu_{1}$$ν1 Ln–(OH2) and the Ln–(OH2) bond distances of the RE hydrates has been given. Recent quantum mechanical calculations support the given interpretation.
Collapse
|
5
|
Kepp KP. Free Energies of Hydration for Metal Ions from Heats of Vaporization. J Phys Chem A 2019; 123:6536-6546. [DOI: 10.1021/acs.jpca.9b05140] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Kasper P. Kepp
- Technical University of Denmark, DTU Chemistry, Building 206, 2800 Kgs. Lyngby, DK, Denmark
| |
Collapse
|
6
|
Baudet K, Kale V, Mirzakhani M, Babel L, Naseri S, Besnard C, Nozary H, Piguet C. Neutral Heteroleptic Lanthanide Complexes for Unravelling Host–Guest Assemblies in Organic Solvents: The Law of Mass Action Revisited. Inorg Chem 2019; 59:62-75. [DOI: 10.1021/acs.inorgchem.9b00755] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Karine Baudet
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Vishal Kale
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Mohsen Mirzakhani
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Lucille Babel
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Soroush Naseri
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Céline Besnard
- 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
| | - Claude Piguet
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| |
Collapse
|
7
|
Solid Phase Extraction of Trace Amounts of Praseodymium Using Transcarpathian Clinoptilolite. COLLOIDS AND INTERFACES 2019. [DOI: 10.3390/colloids3010027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Sorptive properties of the Transcarpathian clinoptilolite towards Pr(III) were studied under dynamic conditions. The sorption capacity of clinoptilolite under optimal conditions (sorbent grain diameter of 0.20–0.31 mm; pH 9.0, temperature of preliminary precalcination of 350 °C, and flow rate of the Pr(III) salt solution with the concentration of 1.0 μg·mL−1 through the sorbent of 5 mL·min−1) was equal to 47.5 mg·g−1. The best desorbent of Pr from the clinoptilolite was the 1 M solution of KCl acidified with HCl to a pH value of 3.0. The method of Pr(III) trace amounts preconcentration in a solid phase extraction mode with further determination of this REE via spectrophotometric technique was developed. The linearity of the proposed method was evaluated in the range of 2–100 ng·mL−1 with detection limit of 0.7 ng·mL−1.
Collapse
|
8
|
Ali SM. Role of Ligand Straining in Complexation of Eu 3+-Am 3+ Ions by TPEN and PPDEN, Scalar Relativistic DFT Exploration in Conjunction with COSMO-RS. ACS OMEGA 2018; 3:13104-13116. [PMID: 31458031 PMCID: PMC6644696 DOI: 10.1021/acsomega.8b00933] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 09/28/2018] [Indexed: 06/10/2023]
Abstract
To search for new ligands suitable for the separation of minor actinides (MA) from lanthanides (Ln) in nuclear waste reprocessing, theoretical (density functional theory) studies were carried out on the complexation (structures, bonding, and thermodynamics) of La3+, Sm3+, Eu3+, and Am3+ complexes with moderately soft donor ligands TPEN [N,N,N',N'-tetrakis(2-pyridylmethyl)ethylenediamine] and PPDEN [N,N,N',N″,N″-pentakis(2-pyridylmethyl) diethylenetriamine] in aqueous and nitrobenzene solutions. B3LYP level of theory was used in conjunction with the conductor-like screening model for real systems (COSMO-RS). The metal ions in [M(NO3)2(TPEN)]NO3 and [M(NO3)(PPDEN)](NO3)2 complexes were deca-coordinated with both TPEN and PPDEN. The enthalpy of the complexation with TPEN in an aqueous solution was found to be negative, indicating the exothermic nature of the reaction as observed in the experiments. The calculated values of free energy of complexation follow the experimental trend: Am3+ > Sm3+ > La3+. Furthermore, the calculated free energy with PPDEN is reduced compared to that with TPEN, which may be attributed to the ligand straining during complex formation, which is also reflected in greater residual charges on both the Eu3+ and Am3+ central ions in the complexes of octadentate PPDEN compared to hexadentate TPEN. The experimental complexation selectivity of Am3+ over Eu3+ with TPEN is established by employing COSMO-RS. Furthermore, TPEN is Am3+-selective, whereas PPDEN is Eu3+-selective, which could be exploited for the efficient separation of MA from Ln.
Collapse
|
9
|
Li F, Li X, Cui P. Effect of water chemistry on Eu(III) biosorption by magnetic bioadsorbent. RADIOCHIM ACTA 2018. [DOI: 10.1515/ract-2018-2927] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In this study, magnetic biosorbent was fabricated by chemical co-precipitation of Fe(II) and Fe(III) on the surface Paeclomyces catenlannulatus (P. catenlannulatus) by adding NaOH solution under N2 conditions. The influence of water chemistries (i. e. pH, reaction time, temperature, concentration and ionic strength) on Eu(III) biosorption towards magnetic biosorbent was elucidated by batch technique. The batch experiment showed that Eu(III) biosorption on magnetic biosorbent was independent of ionic strength, suggesting that inner-sphere-surface-complexation predominated Eu(III) biosorption. The biosorption kinetics showed the sorption equilibrium was achieved at reaction time of 24 h, and the maximum biosorption capacity of Eu(III) on magnetic biosorbent calculated by Langmuir model was 69.45 mg/g at pH 3.5 and 298 K. The regeneration experiments showed the slight decrease of biosorption capacity after the fifth recycles. These results suggested that this magnetic biosorbent presented the fast biosorption rate and high biosorption capacity for Eu(III). The results of XPS analysis revealed that various oxygenated function groups (e.g. carboxyl, hydroxyl groups) were responsible for the high effective biosorption of Eu(III). These findings manifested that this magnetic biosorbent could be as a high-effective material for the immobilization and pre-concentration of radionuclides from aqueous solution in environment remediation.
Collapse
Affiliation(s)
- Fengbo Li
- The School of Life Science and Environmental Science , Huangshan University , Huangshan 245041 , China , Tel.: +86-559-2546552, Fax: +86-559-2546630
| | - Xiaoyu Li
- The School of Life Science and Environmental Science , Huangshan University , Huangshan 245041 , China
- The College of Plant Protection , Anhui Agricultural University , Hefei 230036 , China
| | - Pu Cui
- The School of Life Science and Environmental Science , Huangshan University , Huangshan 245041 , China
- The College of Plant Protection , Anhui Agricultural University , Hefei 230036 , China
| |
Collapse
|
10
|
|
11
|
|
12
|
Varam Y, Rajkumari L. Complexation studies of N′-[(1E)-1-phenylethylidene]isonicotinohydrazide: An aroylhydrazone Schiff base and lanthanides. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2016.11.098] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
13
|
Iki N, Tanaka T, Hiro‐oka S, Shinoda K. Self‐Assembly of a Trilanthanide(III) Core Sandwiched between Two Thiacalix[4]arene Ligands. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600762] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Nobuhiko Iki
- Graduate School of Environmental StudiesTohoku University6‐6‐07 Aramaki‐Aoba, Aoba‐ku980‐8579SendaiJapan
| | - Teppei Tanaka
- Graduate School of Environmental StudiesTohoku University6‐6‐07 Aramaki‐Aoba, Aoba‐ku980‐8579SendaiJapan
| | - Shoichi Hiro‐oka
- Graduate School of Environmental StudiesTohoku University6‐6‐07 Aramaki‐Aoba, Aoba‐ku980‐8579SendaiJapan
| | - Kozo Shinoda
- Institute of Multidisciplinary Research for Advanced MaterialsTohoku University2‐1‐1 Katahira, Aoba‐kuSendaiJapan
| |
Collapse
|
14
|
Bünzli JCG. Review: Lanthanide coordination chemistry: from old concepts to coordination polymers. J COORD CHEM 2014. [DOI: 10.1080/00958972.2014.957201] [Citation(s) in RCA: 146] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Jean-Claude G. Bünzli
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland
| |
Collapse
|
15
|
Robinson JR, Fan X, Yadav J, Carroll PJ, Wooten AJ, Pericàs MA, Schelter EJ, Walsh PJ. Air- and Water-Tolerant Rare Earth Guanidinium BINOLate Complexes as Practical Precatalysts in Multifunctional Asymmetric Catalysis. J Am Chem Soc 2014; 136:8034-41. [DOI: 10.1021/ja502568g] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Jerome R. Robinson
- P.
Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Xinyuan Fan
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Jagjit Yadav
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Patrick J. Carroll
- P.
Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Alfred J. Wooten
- P.
Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Miquel A. Pericàs
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
- Departament
de Química Orgànica, Universitat de Barcelona (UB), 08028 Barcelona, Spain
| | - Eric J. Schelter
- P.
Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J. Walsh
- P.
Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| |
Collapse
|
16
|
Vallet V, Grenthe I. Can Quantum Chemical Methods be used to Predict Gibbs Energies for Reactions in Solution? A Case Study using Binary and Ternary Lanthanide(III) and Actinide(III) - Tris[4,4,4-trifluoro-1-(2-thienyl)-1,3-butanedione] (TTA) – Tributyl/Trimethyl phosphate (TBP/TMP) Complexes. SOLVENT EXTRACTION AND ION EXCHANGE 2013. [DOI: 10.1080/07366299.2013.800403] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
17
|
Jensen MP, Borkowski M, Laszak I, Beitz JV, Rickert PG, Dietz ML. Anion Effects in the Extraction of Lanthanide 2-Thenoyltrifluoroacetone Complexes into an Ionic Liquid. SEP SCI TECHNOL 2012. [DOI: 10.1080/01496395.2011.620586] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
|
18
|
Im HJ, Park KK, Jung EC. Adsorption behavior of Eu(III) on partially Fe(III)- or Ti(IV)-coated silica. NANOSCALE RESEARCH LETTERS 2012; 7:51. [PMID: 22221407 PMCID: PMC3315413 DOI: 10.1186/1556-276x-7-51] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2011] [Accepted: 01/05/2012] [Indexed: 05/31/2023]
Abstract
The adsorption behavior of Eu(III) onto silica surface, which was partially coated with Fe(III) or Ti(IV), was investigated to determine Fe(III) or Ti(IV) effects on the surface reaction of lanthanides on mineral surfaces in groundwater. Compared with a parallel uncoated silica, the Fe(III)-coated silica did not enhance the adsorption of Eu(III). However, enhanced adsorption of Eu(III) on the Ti(IV)-coated silica was observed by increasing the amount of Ti(IV) on the silica surface.
Collapse
Affiliation(s)
- Hee-Jung Im
- Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute, 150 Deokjin-dong, Yuseong-gu, Daejeon, 305-353, Republic of Korea
| | - Kyoung Kyun Park
- Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute, 150 Deokjin-dong, Yuseong-gu, Daejeon, 305-353, Republic of Korea
| | - Euo Chang Jung
- Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute, 150 Deokjin-dong, Yuseong-gu, Daejeon, 305-353, Republic of Korea
| |
Collapse
|
19
|
Schumacher PD, Woods NA, Doyle JL, Schenk JO, Clark SB. Cathodic preconcentration of f-elements on a mercury film carbon fiber disk microelectrode. Anal Chem 2011; 83:4788-93. [PMID: 21526841 DOI: 10.1021/ac2003517] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Field detection and quantification of f-elements is an important problem in radioanalytical chemistry requiring small, portable devices. Here, characterization of a 10 μm Hg film carbon fiber disk microelectrode to accumulate f-elements is described. Accumulation was performed by cathodic deposition and evaluated by anodic stripping and subsequent ICPMS analyses. La(3+) was used as the model element, and subsequent studies were conducted on a 17 element mixture (Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Th). In the model studies, La(3+) undergoes a sorption phenomenon, and as in other studies and confirmed by ICPMS, a monolayer of atoms on the electrode surface is formed. Dissolved O(2) was found to have no effect on the cathodic accumulation of La(3+). Consideration of electrode reaction conditions is made, and reactions are hypothesized. The limit of detection (LOD) was found to be 10(-7) M with mass detection of 10(9) atoms, approximately 5 orders of magnitude less than at conventionally sized electrodes. To solve a dilution problem in follow-on analyses, a suggestion to use microelectrode chip-based sensors was made.
Collapse
Affiliation(s)
- Paul D Schumacher
- Department of Chemistry, Washington State University, Pullman, Washington 99164, USA
| | | | | | | | | |
Collapse
|
20
|
Kuta J, Clark AE. Trends in Aqueous Hydration Across the 4f Period Assessed by Reliable Computational Methods. Inorg Chem 2010; 49:7808-17. [DOI: 10.1021/ic100623y] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jadwiga Kuta
- Department of Chemistry, Washington State University, Pullman, Washington 99164
| | - Aurora E. Clark
- Department of Chemistry, Washington State University, Pullman, Washington 99164
| |
Collapse
|
21
|
Xiao W, Xia QQ, Zhang YF, Ning LX, Cui ZF. Density Functional Study on Structures and Relative Stability of Gd(H2O)n3+(n= 8,9). CHINESE J CHEM PHYS 2009. [DOI: 10.1088/1674-0068/22/04/395-400] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
22
|
Soderholm L, Skanthakumar S, Wilson RE. Structures and Energetics of Erbium Chloride Complexes in Aqueous Solution. J Phys Chem A 2009; 113:6391-7. [DOI: 10.1021/jp9012366] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- L. Soderholm
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439
| | - S. Skanthakumar
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439
| | - Richard E. Wilson
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439
| |
Collapse
|
23
|
Dinescu A, Clark AE. Thermodynamic and Structural Features of Aqueous Ce(III). J Phys Chem A 2008; 112:11198-206. [DOI: 10.1021/jp8076408] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Adriana Dinescu
- Idaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415-2208, and Department of Chemistry, Washington State University, P.O. Box 644630, Pullman, Washington
| | - Aurora E. Clark
- Idaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415-2208, and Department of Chemistry, Washington State University, P.O. Box 644630, Pullman, Washington
| |
Collapse
|
24
|
Sánchez-Lombardo I, Yatsimirsky AK. Simplified Speciation and Improved Phosphodiesterolytic Activity of Hydroxo Complexes of Trivalent Lanthanides in Aqueous DMSO. Inorg Chem 2008; 47:2514-25. [DOI: 10.1021/ic701846e] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Irma Sánchez-Lombardo
- Facultad de Química, Universidad Nacional Autónoma de México, 04510 México D.F., México
| | | |
Collapse
|
25
|
Aguilar-Pérez F, Gómez-Tagle P, Collado-Fregoso E, Yatsimirsky AK. Phosphate Ester Hydrolysis by Hydroxo Complexes of Trivalent Lanthanides Stabilized by 4-Imidazolecarboxylate. Inorg Chem 2006; 45:9502-17. [PMID: 17083253 DOI: 10.1021/ic061024v] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The anion of 4-imidazolecarboxylic acid (HL) stabilizes hydroxo complexes of trivalent lanthanides of the type ML(OH)+ (M = La, Pr) and M2L(n)(OH)(6-n) (M = La, n = 2; M = Pr, n = 2, 3; M = Nd, Eu, Dy, n = 1-3). Compositions and stability constants of the complexes have been determined by potentiometric titrations. Spectrophotometric and (1)H NMR titrations with Nd(III) support the reaction model for the formation of hydroxo complexes proposed on the basis of potentiometric results. Kinetics of the hydrolysis of two phosphate diesters, bis(4-nitrophenyl) phosphate (BNPP) and 2-hydroxypropyl 4-nitrophenyl phosphate (HPNPP), and a triester, 4-nitrophenyl diphenyl phosphate (NPDPP), in the presence of hydroxo complexes of five lanthanides were studied as a function of pH and metal and ligand concentrations. With all lanthanides and all substrates, complexes with the smallest n, that is M2L2(OH)4 for La and Pr and M2L(OH)5 for Nd, Eu, and Dy, exhibited the highest catalytic activity. Strong inhibitory effects by simple anions (Cl-, NO3-, (EtO)2PO2-, AcO-) were observed indicating high affinity of neutral hydroxo complexes toward anionic species. The catalytic activity decreased in the order La > Pr > Nd > Eu > Dy for both diester substrates and was practically independent of the nature of cation for a triester substrate. The efficiency of catalysis, expressed as the ratio of the second-order rate constant for the ester cleavage by the hydroxo complex to the second-order rate constant for the alkaline hydrolysis of the respective substrate, varied from ca. 1 for NPDPP to 10(2) for HPNPP and to 10(5) for BNPP. The proposed mechanism of catalytic hydrolysis involves reversible bridging complexation of a phosphodiester to the binuclear active species followed by attack on the phosphoryl group by bridging hydroxide (BNPP) or by the alkoxide group of the deprotonated substrate (HPNPP).
Collapse
|
26
|
Jensen MP, Neuefeind J, Beitz JV, Skanthakumar S, Soderholm L. Mechanisms of Metal Ion Transfer into Room-Temperature Ionic Liquids: The Role of Anion Exchange. J Am Chem Soc 2003; 125:15466-73. [PMID: 14664592 DOI: 10.1021/ja037577b] [Citation(s) in RCA: 259] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The structure and stoichiometry of the lanthanide(III) (Ln) complexes with the ligand 2-thenoyltrifluoroacetone (Htta) formed in a biphasic aqueous room-temperature ionic liquid system have been studied by complementary physicochemical methods. Equilibrium thermodynamics, optical absorption and luminescence spectroscopies, high-energy X-ray scattering, EXAFS, and molecular dynamics simulations all support the formation of anionic Nd(tta)4(-) or Eu(tta)4(-) complexes with no water coordinated to the metal center in 1-butyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide (C4mim+Tf2N(-)), rather than the hydrated, neutral complexes, M(tta)(3)(H2O)n)(n = 2 or 3), that form in nonpolar molecular solvents, such as xylene or chloroform. The presence of anionic lanthanide complexes in C4mim+Tf2N(-) is made possible by the exchange of the ionic liquid anions into the aqueous phase for the lanthanide complex. The resulting complexes in the ionic liquid phase should be thought of as weak C4mim+Ln(tta)4(-) ion pairs which exert little influence on the structure of the ionic liquid phase.
Collapse
Affiliation(s)
- Mark P Jensen
- Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA.
| | | | | | | | | |
Collapse
|
27
|
|
28
|
Chiang MH, Williams C, Soderholm L, Antonio M. Coordination of Actinide Ions in Wells−Dawson Heteropolyoxoanion Complexes. Eur J Inorg Chem 2003. [DOI: 10.1002/ejic.200300014] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
29
|
Mundoma C, Greenbaum NL. Binding of europium(III) ions to RNA stem loops: role of the primary hydration sphere in complex formation. Biopolymers 2003; 69:100-9. [PMID: 12717725 DOI: 10.1002/bip.10320] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Understanding the process by which RNA molecules fold into stable structures includes study of the role of site-bound metal ions. Because the alkaline earth metal ions typically associated with RNA structure [most often Mg(II)] do not provide convenient spectroscopic signals, replacement with metal ions having spectroscopically useful properties has been a valuable approach. The luminescence properties of the lanthanide(III) series, in particular europium(III), have made them useful in the study of complexation with biomolecules. We review the physical, chemical, and spectroscopic characteristics of Eu(III) that contribute to its value as a probe of RNA-metal ion interactions, and examples of information obtained from studies of Eu(III) bound to small RNA stem loops. Although Eu(III) has similar site preference to Mg(II), luminescence and isothermal titration calorimetry measurements indicate that Ln(III) loses water molecules from the inner hydration sphere more readily than does Mg(II), resulting in more direct coordination between RNA and the metal ion and very different energetics of binding. In some cases, e.g., a GAAA tetraloop, binding appears to occur by a lock and key process; in the same base sequence containing certain deoxynucleoside substitutions that alter loop structure, binding appears to occur by an induced fit process.
Collapse
Affiliation(s)
- Claudius Mundoma
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee 32306-4390, USA
| | | |
Collapse
|
30
|
Comuzzi C, Di Bernardo P, Polese P, Portanova R, Tolazzi M, Zanonato PL. Lanthanide(III) complex formation with diethylenetriamine in anhydrous N,N-dimethylformamide. Polyhedron 2000. [DOI: 10.1016/s0277-5387(00)00541-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
31
|
Baaden M, Berny F, Madic C, Wipff G. M3+ Lanthanide Cation Solvation by Acetonitrile: The Role of Cation Size, Counterions, and Polarization Effects Investigated by Molecular Dynamics and Quantum Mechanical Simulations. J Phys Chem A 2000. [DOI: 10.1021/jp001352v] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. Baaden
- Institut de Chimie, Université Louis Pasteur, UMR CNRS 7551, 4, rue B. Pascal, 67 000 Strasbourg, France and Commissariat à l'Energie Atomique, BP 171, 30207 Bagnols-sur-Cèze Cédex, France
| | - F. Berny
- Institut de Chimie, Université Louis Pasteur, UMR CNRS 7551, 4, rue B. Pascal, 67 000 Strasbourg, France and Commissariat à l'Energie Atomique, BP 171, 30207 Bagnols-sur-Cèze Cédex, France
| | - C. Madic
- Institut de Chimie, Université Louis Pasteur, UMR CNRS 7551, 4, rue B. Pascal, 67 000 Strasbourg, France and Commissariat à l'Energie Atomique, BP 171, 30207 Bagnols-sur-Cèze Cédex, France
| | - G. Wipff
- Institut de Chimie, Université Louis Pasteur, UMR CNRS 7551, 4, rue B. Pascal, 67 000 Strasbourg, France and Commissariat à l'Energie Atomique, BP 171, 30207 Bagnols-sur-Cèze Cédex, France
| |
Collapse
|
32
|
Fatin-Rouge N, Bünzli JCG. Thermodynamic and structural study of inclusion complexes between trivalent lanthanide ions and native cyclodextrins. Inorganica Chim Acta 1999. [DOI: 10.1016/s0020-1693(99)00227-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
33
|
Henzl MT, Treviño CL, Dvoráková L, Boschi JM. Evidence that deprotonation of serine-55 is responsible for the pH-dependence of the parvalbumin Eu3+ 7F0-->5D0 spectrum. FEBS Lett 1992; 314:130-4. [PMID: 1333989 DOI: 10.1016/0014-5793(92)80958-j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The Eu(III)7F0-->5D0 excitation spectra of the parvalbumins are highly pH-dependent. Below pH 6.0, they exhibit a sharp, partially resolved doublet centered near 5,795 A. However, as the pH is raised, the spectrum becomes increasingly dominated by a much broader signal near 5,784 A. This behavior has been traced to the Eu(III) ion bound at the CD site, but the identity of the moiety undergoing deprotonation remains uncertain. Site-specific mutagenesis studies on the parvalbumin-like protein known as oncomodulin now suggest that the species in question is a liganding serine hydroxyl group. Specifically, replacement of serine-55 by aspartate (the residue present at the corresponding position in the EF site) affords a protein that retains two functional lanthanide binding sites, but fails to undergo the pH-dependent spectral alteration. By contrast, replacement of aspartate-59 by glycine (the corresponding EF site residue) fails to abolish the pH-dependent behavior.
Collapse
Affiliation(s)
- M T Henzl
- Biochemistry Department, University of Missouri-Columbia 65212
| | | | | | | |
Collapse
|