Evsiunina M.V., Huang P., Kalle P., Abel A.S., Korinskiy N.A., Konopkina E.A., Kirsanova A.A., Lanin L.O., Borisova N.E., Shi W., Matveev P.I.
2024-11-27 citations by CoLab: 0
Evsiunina M.V., Matveev P.I., Kalle P., Lemport P.S., Avagyan N.A., Lyssenko K.A., Belousov A.V., Petrov V.G., Ustynyuk Y.A., Gloriozov I.P., Nenajdenko V.G.
2024-10-23 citations by CoLab: 1
Gerasimov M.A., Matveev P.I., Evsiunina M.V., Khult E.K., Kalle P., Petrov V.S., Lemport P.S., Petrov V.G., Kostikova G.V., Ustynyuk Y.A., Nenajdenko V.G.
Molecules Q1 Q2 Open Access
2024-07-28 citations by CoLab: 0 PDF Abstract
A systematic study of extraction systems for the separation of f-elements using the tetradentate N,O-donor diamide of 1,10-phenanthroline-2,9-dicarboxylic acid (L) in various molecular and ionic solvents was performed. It was demonstrated that the nature of a diluent has a significant impact on solvent extraction of Am(III) and Ln(III) and the stoichiometry of formed complexes with f-elements. The mechanism of complexation and forms of complexes in different diluents were investigated by radiometric methods, UV-vis titration, and XRD.
Evsiunina M.V., Khult E.K., Matveev P.I., Kalle P., Lemport P.S., Petrov V.S., Aksenova S.A., Nelyubina Y.V., Koshelev D.S., Utochnikova V.V., Petrov V.G., Ustynyuk Y.A., Nenajdenko V.G.
2024-07-01 citations by CoLab: 8 Abstract
Management of high-level waste is essential for the further sustainable development of nuclear energy. Solvent extraction is one of the technologically acceptable methods for carrying out such processing. The search for new selective extractants is an urgent task that requires systematic research into the structure-properties relationship. 1,10-phenanthroline-2,9-diamides (DAPhen) is a promising ligand class for processing such solutions. Identification of the binding and separation mechanism is the most important fundamental question for any separation system. In this work, we systematically studied of the mechanism of extraction and complex formation by this class of compounds on the example of 4,7-substituted aliphatic 1,10-phenanthroline-2,9-diamides. For systematic comparison, we conducted liquid-liquid extraction studies of f-elements and nitric acid, determination of binding constants (UV–vis and luminescence titration), and structural studies of complexes. Using these methods, it was shown how electron-withdrawing substituents (-Cl) and electron-donating (-OBu) significantly affect the Brønsted and Lewis basicity, the stoichiometry of the complexes formed and the trends in the extraction of f-elements. Moreover, XRD study of an array of complex compounds allowed us to establish the structural features that determine the efficiency and selectivity of liquid-liquid extraction.
Gerasimov M.A., Pozdeev A.S., Evsiunina M.V., Kalle P., Yarenkov N.R., Borisova N.E., Matveev P.I.
2024-01-18 citations by CoLab: 3
Kalinin M.A., Evsiunina M.V., Kalle P., Lyssenko K.A., Matveev P.I., Borisova N.E.
2023-12-19 citations by CoLab: 5
Borisova N.E., Kharcheva A.V., Shmelkov K.D., Gerasimov M.A., Evsiunina M.V., Matveev P.I., Ivanov A.V., Sokolovskaya Y.G., Patsaeva S.V.
Metals Q1 Q2 Open Access
2023-12-18 citations by CoLab: 2 PDF Abstract
To examine the scope of the abnormal aryl strengthening effect (an increase in the extraction of metal ions when an aromatic substituent is introduced into the amide group) on f-metal extraction, a series of tetradentate diamide-type extragents bearing electron-withdrawing pyridine rings in amide moieties of the molecules were tested. The solvent extraction of Am(III)/Eu(III) pairs was investigated under various conditions, the solution chemistry of the lanthanide-extragents systems was studied, and the bonding constants were calculated for complexes of Eu(III) and Tb(III) ions with diamides. The photophysical properties of chemically synthesized ligand/metal (LM) complexes with various LM compositions were additionally studied in depth. The replacement of a phenyl ring by a pyridine one led to a critical reduction in metal affinity, showing the major contribution of electronic nature to the abnormal aryl strengthening effect. However, the pyridine group in the amide side chain provided additional coordination positions for metal ion binding; corresponding complexes with LM2 composition were detected in the system and their stability was calculated. Due to the low stability of the corresponding LM2 complexes, chemical synthesis of the complexes led to the formation of only one metal-containing species with LM composition. The luminescence spectra of europium and terbium complexes of the LM composition were studied. Differences were discovered in the luminescence excitation spectra of europium and terbium complexes with the same ligand. The luminescence quantum yields and luminescence lifetimes of solutions of europium and terbium complexes were determined.
Avagyan N.A., Lemport P.S., Roznyatovsky V.A., Evsiunina M.V., Matveev P.I., Gerasimov M.A., Lyssenko K.A., Goncharenko V.E., Khrustalev V.N., Dorovatovskii P.V., Tarasevich B.N., Yakushev A.A., Averin A.D., Gloriozov I.P., Petrov V.G., et. al.
2023-10-17 citations by CoLab: 8
Yatsenko A.V., Evsiunina M.V., Nelyubina Y.V., Isakovskaya K.L., Lemport P.S., Matveev P.I., Petrov V.G., Tafeenko V.A., Aldoshin A.S., Ustynyuk Y.A., Nenajdenko V.G.
Polyhedron Q3 Q2
2023-10-01 citations by CoLab: 7 Abstract
Two series of crystal structures of 1:1 complexes of lanthanoid (excluding Pm) and yttrium trinitrates with N,N,N',N'-tetrabutylamide of 1,10-phenanthroline-2,9-dicarboxylic acid (L1) and N,N,N',N'-tetrabutylamide of 4,7-dichloro-1,10-phenanthroline-2,9-dicarboxylic acid (L2) that we started to study in previous works, have been completed. In all complexes, the ligands L1 and L2 coordinate central ions via two phenanthroline nitrogen atoms and two amide oxygen atoms. In complexes formed by early and middle lanthanoids, all three nitrate ions are bidentate, which gives a total coordination number equal to 10. In heavy lanthanoids complexes, starting from Ho for L1 and Yb for L2, coordination number was reduced to 9 because one nitrate turns to a monodentate coordination mode or is replaced by a water molecule. The Ln-N bonds in complexes with L2 are by 0.02-0.06 Å longer that those in L1 complexes throughout the whole lanthanoid row. With a decrease in the radius of the central ion, all coordination bonds become shorter, but their shortening occurs unevenly. In complexes with L1, between Dy and Ho, along with the reduction of the coordination number, the Ln(Y)–N bond lengths decrease abruptly, whereas the bonds Ln(Y)–O(NO3) shorten to a much lesser extent, and the Ln(Y)–O(amide) distances change almost continuously. In complexes with L2, a similar sharp shortening of Ln(Y)–N bonds takes place before the coordination number decreases to 9. The observed structural changes agree with the results of DFT calculations.
Avagyan N.A., Lemport P.S., Evsiunina M.V., Matveev P.I., Aksenova S.A., Nelyubina Y.V., Yatsenko A.V., Tafeenko V.A., Petrov V.G., Ustynyuk Y.A., Bi X., Nenajdenko V.G.
2023-03-14 citations by CoLab: 10 PDF Abstract
Three pyrrolidine-derived phenanthroline diamides were studied as ligands for lutetium trinitrate. The structural features of the complexes have been studied using various spectral methods and X-ray. The presence of halogen atoms in the structure of phenanthroline ligands has a significant impact on both the coordination number of lutetium and the number of solvate water molecules in the internal coordination sphere. The stability constants of complexes with La(NO3)3, Nd(NO3)3, Eu(NO3)3, and Lu(NO3)3 were measured to demonstrate higher efficiency of fluorinated ligands. NMR titration was performed for this ligand, and it was found that complexation with lutetium leads to an approximately 13 ppm shift of the corresponding signal in the 19F NMR spectrum. The possibility of formation of a polymeric oxo-complex of this ligand with lutetium nitrate was demonstrated. Experiments on the liquid–liquid extraction of Am(III) and Ln(III) nitrates were carried out to demonstrate advantageous features of chlorinated and fluorinated pyrrolidine diamides.
Petrov V.S., Avagyan N.A., Lamport P.S., Matveev P.I., Evsiunina M.V., Roznyatovsky V.A., Tarasevich B.N., Isakovskaya K.L., Ustynyuk Y.A., Nenajdenko V.G.
2023-03-01 citations by CoLab: 10
Borisova N.E., Fedoseev A.M., Kostikova G.V., Matveev P.I., Starostin L.Y., Sokolova M.N., Evsiunina M.V.
2022-12-14 citations by CoLab: 3
Ustynyuk Y.A., Zhokhova N.I., Gloriozov I.P., Matveev P.I., Evsiunina M.V., Lemport P.S., Pozdeev A.S., Petrov V.G., Yatsenko A.V., Tafeenko V.A., Nenajdenko V.G.
2022-12-08 citations by CoLab: 15 PDF Abstract
The fact of the fracture of the extraction curve of lanthanides by 1,10-phenanthroline-2,9-diamides is explained in terms of the structure of complexes, solvent extraction data and quantum chemical calculations. The solvent extraction proceeds in two competing directions: in the form of neutral complexes LLn(NO3)3 and in the form of tight ion pairs {[LLn(NO3)2 H2O]+ (NO3−).
Golubenko D.V., Malakhova V.R., Yurova P.A., Evsiunina M.V., Stenina I.A.
2022-08-14 citations by CoLab: 4 Abstract
The process of heterogeneous sulfonation of a radiation-grafted copolymer of polystyrene and polyvinylidene fluoride depending on the reaction time and the type of sulfonating agent (chlorosulfonic acid or its equimolar mixture with acetic acid) has been studied. The water uptake, ion-exchange capacity, and ionic conductivity of the prepared membranes have been characterized. In addition, composition and morphology of materials at different synthesis stages have been analyzed by FTIR, 1Н NMR, and EPR spectroscopies, elemental analysis, and scanning electron microscopy combined with energy dispersive X-ray microanalysis. The ionic conductivity of the prepared materials exceeds that of Nafion®212 membranes. In addition, the mechanical properties and hydrogen gas permeability of the membrane with the highest ionic conductivity (52 mS/cm at 80°C in contact with water) are better than those of the Nafion®212 membrane.
Lemport P.S., Evsiunina M.V., Matveev P.I., Petrov V.S., Pozdeev A.S., Khult E.K., Nelyubina Y.V., Isakovskaya K.L., Roznyatovsky V.A., Gloriozov I.P., Tarasevich B.N., Aldoshin A.S., Petrov V.G., Kalmykov S.N., Ustynyuk Y.A., et. al.
2022-07-08 citations by CoLab: 31 Abstract
In this work we report on new examples of phenanthrolindiamides containing asymmetric centers in amide substituents. The synthesized ligands are expected to have complex thermodynamic behavior. Their structure was unambiguously...
Zhang M., Yang Z., Xu C., Li T., Liu X., Sun G., Peng X., Cui Y.
2025-02-04 citations by CoLab: 0
Noufele C.N., Pham C.T., Abram U.
MolBank Q4 Q4 Open Access
2025-01-06 citations by CoLab: 1 PDF Abstract
Reactions of 2,2′-bipyridine-6,6′-dicarbonyl-bis(N,N-diethylthiourea), H2Lbipy, with a mixture of thorium nitrate hydrate and nickel acetate hydrate in methanol with NEt3 as a supporting base yield brown single crystals of the bimetallic complex [ThNi(Lbipy)2(CH3COO)2(MeOH)]. Two 2,2′-bipyridine-centered bis(aroylthioureato) ligands connect the metal atoms in a way that the thorium atom is coordinated by two O,N,N,O donor atom sets, while the nickel atom establishes two S,O chelate rings in its equatorial coordination plane. The metal atoms are connected by a bridging acetato ligand, and their coordination spheres are completed by one methanol ligand (nickel) and a monodentate acetato ligand (thorium). A distorted octahedral coordination environment is established around the Ni2+ ion, while the Th4+ ion is in first approximation a 10-coordinate with a diffusely defined coordination polyhedron.
Gao F., Xu X., Yang X., Cao H., Fang D., Xu L., Xu C., Xiao C.
2025-01-01 citations by CoLab: 0 Abstract
N,O-heterocyclic ligands such as 2,9-diamide-1,10-phenanthroline dicarboxamide (DAPhen) and bis-lactam-1,10-phenanthroline (BLPhen) exhibit excellent separation performance for Am(III) and Eu(III) in high-level liquid waste. However, DAPhen-based ligands show poor extraction capacity, and...
Kenf E., Tkachenko L., Babain V., Sapozhnikova N., Alyapyshev M.
2024-12-31 citations by CoLab: 0
Stoykov I.I., Antipin I.S., Burilov V.A., Kurbangalieva A.R., Rostovsky N.V., Pankova A.S., Balova I.A., Remizov Y.O., Pevzner L.M., Petrov M.L., Vasily A.V., Averin A.D., Beletskaya I.P., Nenaydenko V.G., Beloglazkina E.K., et. al.
2024-12-27 citations by CoLab: 0 Abstract
An overview of the main scientific achievements of Russian universities in the field of organic chemistry for the period 2018–2023 is presented.
Artyushin O.I., Sharova E.V., Tcarkova K.V., Peregudov A.S., Bondarenko N.A.
2024-12-20 citations by CoLab: 0 Abstract
Bis(N-Alkyl-N-diphenylphosphinylmethyl)diglycolamides [Ph2P(O)CH2N(R)C(O)CH2]2O, where R = Et, i-Pr, n-Bu, i-Bu, n-Oct, were synthesized by reaction of diglycolyl chloride with N-alkyl-N-(diphenylphosphinylmethyl)amines Ph2P(O)CH2NHR obtained by the Kabachnik–Fields reaction of aminomethylation of diphenylphosphinous acid, and their hydrochlorides. The structure of the obtained compounds was studied by 1H, 13C and 31P NMR spectroscopy.
Konopkina E.A., Pavlova E.A., Gopin A.V., Kalle P., Chernysheva M.G., Nechitailova I.O., Guda A.A., Petrov V.G., Borisova N.E., Matveev P.I.
2024-12-19 citations by CoLab: 0
Gutorova S.V., Novichkov D.A., Trigub A.L., Wang Q., Gerasimov M.A., Kalle P., Arkhipova E.A., Ivanov A.S., Evsiunina M.V., Poliakova T.R., Averin A.A., Petrov V.G., Khvostov A.V., Kirsanova A.A., Borisova N.E., et. al.
2024-12-01 citations by CoLab: 0
Hou J., Zhao X., Tan Q., Wang P., Shi X., Fan Q., Pan D., Wu W.
2024-12-01 citations by CoLab: 1
Orlova A.V., Yin Y., Petrov V.S., Lemport P.S., Kozhevnikova V.Y., Nenajdenko V.G., Utochnikova V.V.
2024-11-29 citations by CoLab: 0
Petrov V.S., Lemport P.S., Evsiunina M.V., Matveev P.I., Kalle P., Nelyubina Y.V., Aksenova S.A., Averin A.D., Yakushev A.A., Roznyatovsky V.A., Zonov R.V., Petrov V.G., Gloriozov I.P., Ustynyuk Y.A., Nenajdenko V.G.
2024-11-28 citations by CoLab: 0 Abstract
AbstractTwo novel 1,10‐phenanthroline‐2,9‐diamide ligands were constructed on the basis of 2‐phenylpyrrolidine and obtained as pure diastereomers. These ligands demonstrated advanced properties in liquid‐liquid extraction tests. They revealed high efficiency of americium(III) extraction alongside with the record values of selectivity in the separation of americium from light lanthanides from strongly acidic media. An abrupt increase of extraction efficiency when moving along the lanthanide series from lanthanum to lutetium was observed. The examination of the extraction behavior of pure diastereomeric forms revealed noticeable differences in their selectivity while maintaining the overall extraction trend. The explanation of the discovered patterns was elucidated by a comprehensive study of the ability of the ligands to bind lanthanide nitrates in solutions. All the data collected (UV‐vis and NMR titration, X‐ray analysis of resulting complexes, solvation numbers estimation) were supported by quantum chemical calculation. These data clearly indicated that in the case of light lanthanides the formation of 1 : 1 complexes is most preferable. At the same time, complexes with heavy lanthanides, such as ytterbium and lutetium, exist as ionic pairs which may consist of [L2M]z+ cations counterbalanced by metallate anions, which may result in the formation of the species of unusual composition like L2M2 or even L4M5 clusters.
Evsiunina M.V., Huang P., Kalle P., Abel A.S., Korinskiy N.A., Konopkina E.A., Kirsanova A.A., Lanin L.O., Borisova N.E., Shi W., Matveev P.I.
2024-11-27 citations by CoLab: 0
Turanov A.N., Karandashev V.K., Artyushin O.I., Sharova E.V.
2024-11-13 citations by CoLab: 0 Abstract
It was found that the extraction of lanthanides(III) from nitric acid solutions with solutions of carbamoylmethylphosphine oxides increases significantly in the presence of dinonylnaphthalene sulfonic acid. The stoichiometry of the extracted complexes was determined, and the influence of the composition of the aqueous phase, the nature of the organic solvent, and the structure of carbamoylmethylphosphine oxides on the efficiency of extraction of metal ions into the organic phase was considered.
Evsiunina M.V., Khult E.K., Matveev P.I., Kalle P., Lemport P.S., Petrov V.S., Aksenova S.A., Nelyubina Y.V., Koshelev D.S., Utochnikova V.V., Petrov V.G., Ustynyuk Y.A., Nenajdenko V.G.
2024-07-01 citations by CoLab: 8 Abstract
Management of high-level waste is essential for the further sustainable development of nuclear energy. Solvent extraction is one of the technologically acceptable methods for carrying out such processing. The search for new selective extractants is an urgent task that requires systematic research into the structure-properties relationship. 1,10-phenanthroline-2,9-diamides (DAPhen) is a promising ligand class for processing such solutions. Identification of the binding and separation mechanism is the most important fundamental question for any separation system. In this work, we systematically studied of the mechanism of extraction and complex formation by this class of compounds on the example of 4,7-substituted aliphatic 1,10-phenanthroline-2,9-diamides. For systematic comparison, we conducted liquid-liquid extraction studies of f-elements and nitric acid, determination of binding constants (UV–vis and luminescence titration), and structural studies of complexes. Using these methods, it was shown how electron-withdrawing substituents (-Cl) and electron-donating (-OBu) significantly affect the Brønsted and Lewis basicity, the stoichiometry of the complexes formed and the trends in the extraction of f-elements. Moreover, XRD study of an array of complex compounds allowed us to establish the structural features that determine the efficiency and selectivity of liquid-liquid extraction.
Li S., Jansone-Popova S., Jiang D.
2024-05-17 citations by CoLab: 6 PDF Abstract
AbstractUnderstanding lanthanide coordination chemistry can help develop new ligands for more efficient separation of lanthanides for critical materials needs. The Cambridge Structural Database (CSD) contains tens of thousands of single crystal structures of lanthanide complexes that can serve as a training ground for both fundamental chemical insights and future machine learning and generative artificial intelligence models. This work aims to understand the currently available structures of lanthanide complexes in CSD by analyzing the coordination shell, donor types, and ligand types, from the perspective of rare-earth element (REE) separations. We obtain four sets of lanthanide complexes from CSD: Subset 1, all Ln-containing complexes (49472 structures); Subset 2, mononuclear Ln complexes (27858 structures); Subset 3, mononuclear Ln complexes without cyclopentadienyl ligands (Cp) (26156 structures); Subset 4, Ln complexes with at least one 1,10-phenanthroline (phen) or its derivative as a coordinating ligand (2226 structures). The subsequent analysis of lanthanide complexes in these subsets examines the trends in coordination numbers and first shell distances as well as identifies and characterizes the ligands and donor groups. In addition, examples of Ln-complexes with commercially available complexants and phen-based ligands are interrogated in detail. This systematic investigation lays the groundwork for future data-driven ligand designs for REE separations based on the structural insights into the lanthanide coordination chemistry.
Xiu T., Liu L., Liu S., Shehzad H., Liang Y., Zhang M., Ye G., Jiao C., Yuan L., Shi W.
2024-03-01 citations by CoLab: 4 Abstract
Although phenanthroline diamide ligands have been widely reported, their limited solubility in organic solvents and poor performance in the separation of trivalent actinides (An(III)) and lanthanides (Ln(III)) at high acidity are still clear demerits. In this study, we designed and synthesized three highly soluble phenanthroline diamide ligands with different side chains. By introducing alkyl chains and ester groups, the ligands solubility in 3-nitrotrifluorotoluene is increased to over 600 mmol/L, significantly higher than the previous reported phenanthroline diamide ligands. Based on anomalous aryl strengthening, benzene ring was incorporated to enhance ligand selectivity toward Am(III). Extraction experiments demonstrated favorable selectivity of all the three ligands towards Am(III). The optimal separation factor (SFAm/Eu) reaches 53 at 4 mol/L HNO3, representing one of the most effective separation of An(III) over Ln(III) under high acidity. Slope analysis, single crystal structure analysis, as well as titration of ultraviolet visible spectroscopy, mass spectrometry, and nuclear magnetic resonanc confirmed the formation of 1:1 and 1:2 complex species between the metal ions and the ligands depending on the molar ratio of metal ions in the reaction mixture. The findings of this study offer valuable insights for developing phenanthroline diamide ligands for An(III)/Ln(III) separation.
Wang S., Yang X., Liu Y., Xu L., Xu C., Xiao C.
2024-01-29 citations by CoLab: 12
Gerasimov M.A., Pozdeev A.S., Evsiunina M.V., Kalle P., Yarenkov N.R., Borisova N.E., Matveev P.I.
2024-01-18 citations by CoLab: 3
Konopkina E., Gopin A., Pozdeev A., Chernysheva M.G., Kalle P., Pavlova E., Kalmykov S., Petrov V.G., Borisova N.E., Guda A.A., Matveev P.I.
2024-01-01 citations by CoLab: 6 Abstract
A variant of microfluidic setup design for the study of extraction kinetics has been proposed. Mass transfer constants for Am(III) and Eu(III) and observed rate constants were obtained for N-,O-donor...
Wang H., Gao P., Cui T., Wang D., Liu J., He H., Chen Z., Jin Q., Guo Z.
2024-01-01 citations by CoLab: 5 Abstract
To tune the complexation and solvent extraction performance of the ligands with 1,10-phenanthroline core for trivalent actinide (An3+) and lanthanide (Ln3+), we synthesized two new asymmetric tetradentate ligands with pyrazol...
Liu Y., Kang Y., Bao M., Cao H., Weng C., Dong X., Hao H., Tang X., Chen J., Wang L., Xu C.
2024-01-01 citations by CoLab: 9 Abstract
The separation of Lns(III) from radioactive Ans(III) in high-level liquid waste remains a formidable hydrometallurgical challenge. Water-soluble ligands are believed to be new frontiers in the search of efficient Lns/Ans separation ligands to close the nuclear fuel cycles and dealing with current existing nuclear waste. Currently, the development of hydrophilic ligands far lags behind their lipophilic counterparts due to their complicated synthetic procedures, inferior extraction performances, and acid tolerances. In this paper, we have showed a series of hydroxyl-group functionalized phenanthroline diimides were efficient masking agents for Am(III)/Eu(III) separation under high acidity (˃ 1 M HNO3). Record high SFEu(III)/Am(III) of 162 and 264 were observed for Phen-2DIC2OH and Phen-2DIC4OH in 1.25 M HNO3 which represents the best Eu(III)/Am(III) separation performance at this acidity. UV-vis absorption, NMR and TRLFS titrations were conducted to elucidate the predominant of 1:1 ligand/metal species under extraction conditions. X-ray data of both the ligand and Eu(III) complex together with DFT calculations revealed the superior extraction performances and selectivities. The current reported hydrophilic ligands were easy to prepare and readily to scale-up, acid tolerant and highly efficient, together with their CHON-compatible nature make them promising candidates in the development of advanced separation processes.
Marcial J., Riley B.J., Kruger A.A., Lonergan C.E., Vienna J.D.
2024-01-01 citations by CoLab: 24 Abstract
This paper summarizes the vast body of literature (over 200 documents) related to vitrification of the low-activity waste (LAW) fraction of the Hanford tank wastes. Details are provided on the origins of the Hanford tank wastes that resulted from nuclear operations conducted between 1944 and 1989 to support nuclear weapons production. Waste treatment processes are described, including the baseline process to separate the tank waste into LAW and high-level waste fractions, and the LAW vitrification facility being started at Hanford. Significant focus is placed on the glass composition development and the property-composition relationships for Hanford LAW glasses. Glass disposal plans and criteria for minimizing long-term environmental impacts are discussed along with research perspectives.
Karduri R.K., Ananth C.
2023-12-19 citations by CoLab: 2
Xu L., Yang X., Zhang A., Xu C., Xiao C.
2023-12-01 citations by CoLab: 42 Abstract
The chemical separation of minor actinides (MAs) over lanthanides from high-level waste (HLW) is one of the hottest and most difficult topics in international separation science. N, O-hybrid phenanthroline-derived extractants have shown good potential in the separation of minor actinides over lanthanides from highly acidic HNO3 solution by liquid–liquid solvent or solid extraction method. The 1,10-phenanthroline skeleton can serve as a platform to design various extractants for the separation of actinides. In this review, the recent progress made in the hard-soft donors combined 1,10-phenanthroline type extractants for separation and complexation with f-block elements is summarized. The structure–activity relationships between the extractants and their separation performances are discussed, which can provide practical strategies to design more efficient extractants for actinides separation. Finally, the future perspectives and trends in those phenanthroline-derived extractants for actinides separation are proposed.
Kharcheva A.V., Bozhko A.A., Sokolovskaya Y.G., Borisova N.E., Ivanov A.V., Patsaeva S.V.
Photonics Q2 Q2 Open Access
2023-10-20 citations by CoLab: 6 PDF Abstract
In this paper we describe the results of the influence of temperature in the range of 280–340 K on the luminescence of bimetallic Eu/Tb complexes with N-heterocyclic ligand L based on 2,2′-bipyridyldicarboxylic acid in acetonitrile. The experiments were carried out for systems with various Eu/Tb ratios. The stability of the complexes of the ligand L with metal M (Eu or Tb) was determined using spectrophotometric titration in acetonitrile solutions. The LM complexes’ stability constants were found to be typical for these systems; however, the stability of Eu complex is slightly higher than that for Tb. Along with rising temperature, we observed a decrease in Tb emission intensity and, at the same time, an enhancement in Eu luminescence. An explanation of Eu luminescence enhancement involves the appearance of charge transfer states, bands of which can be observed in the Eu luminescence excitation spectra as difference spectra measured with two close temperatures. The unusual Eu luminescence enhancement upon heating was observed for the first time for the complex with tetradentate O,N-type heterocyclic diamide ligand L, while an inverse phenomenon was observed with the Tb luminescence. The Eu luminescence enhancement was found earlier for various carboxylate complex salts, but not for heterocyclic coordination complexes. This allows the construction of a ratiometric luminescent thermometer in the range of 280–340 K using the ratio of luminescence intensities for Eu and Tb. The stability constants for the individual Eu and Tb complexes help us to understand the equilibrium in L:Tb:Eu complex system and shed light on plausible speciation in solution.
Avagyan N.A., Lemport P.S., Roznyatovsky V.A., Evsiunina M.V., Matveev P.I., Gerasimov M.A., Lyssenko K.A., Goncharenko V.E., Khrustalev V.N., Dorovatovskii P.V., Tarasevich B.N., Yakushev A.A., Averin A.D., Gloriozov I.P., Petrov V.G., et. al.
2023-10-17 citations by CoLab: 8
Yatsenko A.V., Evsiunina M.V., Nelyubina Y.V., Isakovskaya K.L., Lemport P.S., Matveev P.I., Petrov V.G., Tafeenko V.A., Aldoshin A.S., Ustynyuk Y.A., Nenajdenko V.G.
Polyhedron Q3 Q2
2023-10-01 citations by CoLab: 7 Abstract
Two series of crystal structures of 1:1 complexes of lanthanoid (excluding Pm) and yttrium trinitrates with N,N,N',N'-tetrabutylamide of 1,10-phenanthroline-2,9-dicarboxylic acid (L1) and N,N,N',N'-tetrabutylamide of 4,7-dichloro-1,10-phenanthroline-2,9-dicarboxylic acid (L2) that we started to study in previous works, have been completed. In all complexes, the ligands L1 and L2 coordinate central ions via two phenanthroline nitrogen atoms and two amide oxygen atoms. In complexes formed by early and middle lanthanoids, all three nitrate ions are bidentate, which gives a total coordination number equal to 10. In heavy lanthanoids complexes, starting from Ho for L1 and Yb for L2, coordination number was reduced to 9 because one nitrate turns to a monodentate coordination mode or is replaced by a water molecule. The Ln-N bonds in complexes with L2 are by 0.02-0.06 Å longer that those in L1 complexes throughout the whole lanthanoid row. With a decrease in the radius of the central ion, all coordination bonds become shorter, but their shortening occurs unevenly. In complexes with L1, between Dy and Ho, along with the reduction of the coordination number, the Ln(Y)–N bond lengths decrease abruptly, whereas the bonds Ln(Y)–O(NO3) shorten to a much lesser extent, and the Ln(Y)–O(amide) distances change almost continuously. In complexes with L2, a similar sharp shortening of Ln(Y)–N bonds takes place before the coordination number decreases to 9. The observed structural changes agree with the results of DFT calculations.
Total publications
21
Total citations
257
Citations per publication
12.24
Average publications per year
3
Average coauthors
9.43
Publications years
2018-2024 (7 years)
h-index
10
i10-index
10
m-index
1.43
o-index
21
g-index
15
w-index
3
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