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Thermodynamic vs. kinetic control: Case study of Eu(III) molecular and polymer β-diketonate complexes
Inorganic Chemistry Communications. 2025. Vol. 178. Article 114640.
Crystal engineering of lanthanide coordination compounds plays crucial role in the design of emitters with set properties. Reaction of Eu(OH)3 and 4,4,4-trifluoro-1-(1,5-dimethyl-1H-pyrazol-4-yl)butane-1,3-dione (HL) in various media led to the formation of 8 new crystal structures with the general formula [Eu(L)3(Solv1 )x](Solv2 )y, where Solv1 , Solv2 and x, y vary in the choice of solvent (Solv = MeOH, EtOH, i-PrOH, n-PrOH, i-BuOH, n-BuOH, t-BuOH, H2O) and x = 1, 2; y = 0, 1. Moreover, a linear polymer with the formula [Eu(L)3(H2O)]n was isolated from its ethanol solution. The nature of the solvent plays crucial role in the crystal engineering of molecular Eu3+ diketonates. Molecular complexes were confirmed to be kinetic products of the reaction that undergo transformation to thermodynamically stable polymer complex [Eu(L)3(H2O)]n. Variation of the alcohol steric hindrance results in redistribution of Stark subbands and Eu3+ lifetimes, allowing for fine tuning of the luminescent properties of the complexes. Our findings pave the way for selective synthesis of novel materials for optoelectronics and biomedicine.
Гущина В. А., Mendeleev Communications 2025 Vol. 35 No. 2 P. 193–195
All-inorganic perovskite CsPbBr3 and Cs4PbBr6 nanoparticles are intensively studied for their unique optical properties, though synthesizing single-phase nanoparticles has posed challenges. Detailed synthesis method of CsPbBr3 and Cs4PbBr6 single-phase nanoparticles and their chemical and phase analysis are described. Distinctive optical characteristics, such as photoluminescence, optical band gap and the Urbach tail region, are revealed and explained within the current ...
Added: May 14, 2026
Metlina D., Metlin M., Korshunov V. et al., Dalton Transactions 2025 Vol. 54 No. 9 P. 3812–3826
We synthesized and investigated a new series of Sm3+ 1,3-diketonate complexes with CnF2n+1-homologous thiophene-containing ligands. A clear correlation was found between the number of fluorine atoms in the 1,3-diketone's carbon chain and the luminescent properties of the samarium(III) complexes. The ligand modification method employed facilitates targeted and significant enhancements in the photoluminescence quantum yield (PLQY). ...
Added: March 24, 2026
Polikovskiy T., Gontcharenko V., Korshunov V. et al., Materials Chemistry Frontiers 2025 Vol. 9 No. 23 P. 3443–3459
Conventional thermal sensors often face limitations due to their reliance on direct contact and restricted measurement ranges, leading to the emergence of novel techniques like luminescence thermometry. However, sensitivity of luminescent thermometers is limited by the only used Boltzmann-based Mott–Seitz model, which is imperfect. To overcome this, we complemented Mott–Seitz model applying machine learning algorithms, ...
Added: March 24, 2026
Alekseev D., Logunov M., Lazarev M. et al., Computational Materials Science 2025 Vol. 248 Article 113572
Two-dimensional C60 carbon allotropes have gained much attention since their first synthesis in 2022, but many of their thermophysical and mechanical properties remain unreported in the literature. In this article, we performed a high-temperature molecular dynamics study of quasi-hexagonal (qHP) and quasi-tetragonal (qTP) C60 phases using the modern machine-learning interatomic potential GAP-20. We show that, ...
Added: February 18, 2026
Polikovsky T. A., Gontcharenko V., Ivanova A. A. et al., New Journal of Chemistry 2025 Vol. 49 No. 22 P. 9214–9225
This study explores the effects of minor chemical structure modifications on the thermometric performance
of a novel mixed-metal complex [Tb0.94Eu0.06L3(TPPO)2] (HL – 4,4,4-trifluoro-1-(furan-2-yl)butan-1,3dione, TPPO – triphenylphosphine oxide). By replacing NO3
with an HL anion, we observed a significant
enhancement in the complex’s luminescent properties, including a shift in the high-sensitivity temperature
range from 250 K to 150 K ...
Added: February 15, 2026
Belousov Y., Polikovsky T. A., Metlin M. T. et al., Dalton Transactions 2026 Vol. 55 No. 7 P. 3087–3100
Our series of works on acylpyrazolonates of lanthanides has shown that although these beta-diketonate ligands are effective in sensitizing the luminescence of Tb3+, Dy3+, Sm3+ ions, and IR-emitting Yb3+, there is typically a sharp drop in efficiency in the case of Eu3+. To investigate this phenomenon, three series of complexes of samarium, europium, and gadolinium ...
Added: February 15, 2026
Новоселова К. Н., Шейченко Е. Д., Попков М. А. et al., Russian Journal of Inorganic Chemistry 2025 No. 70 P. 2158–2164
A method of the synthesis of stable aqueous sols of HfO2 doped with Eu3+ or Gd3+ cations is proposed. It is shown that the introduction of lanthanide cation into hafnium oxide structure leads to stabilisation of metastable tetragonal modification of HfO2. By the method of dynamic light scattering it is shown that HfO2 sols doped ...
Added: November 6, 2025
Nykhrikova E., Kiseleva M., Kalle P. et al., Inorganic Chemistry 2025 Vol. 64 No. 10 P. 5210–5220
Multifunctional compounds with properties that may be triggered by different external stimuli are highly desirable yet challenging in their design and synthesis. Herein, we report a cyclometalated iridium(III) complex based on bulky 1,2-diphenylphenanthroimidazole (C^N) that can easily change its molecular geometry from trigonal-bipyramidal to octahedral or from a monomeric to dimeric state in response to ...
Added: July 2, 2025
Tatarin S., Krasnov L., Nykhrikova E. et al., Journal of Materials Chemistry C 2025 Vol. 13 No. 16 P. 8217–8227
Cyclometalated iridium(III) complexes are excellent emitters for organic light-emitting diodes (OLEDs), but the design of these compounds requires substantial cost and experimental efforts. In this work, we aimed at a simple and fast data-driven prediction of their luminescence properties based on the experimental data. To this end, we created a database (IrLumDB) that contains experimentally ...
Added: July 2, 2025
Kashina M., Luzyanin K., Dar'in D. et al., Inorganic Chemistry 2024 Vol. 63 No. 12 P. 5315–5319
Metal-mediated self-assembly of isocyanides and methyl 4-aminopyrimidine-5-carboxylate leads to luminescent PdII and PtII complexes featuring C,N-cyclometalated acyclic diaminocarbene (ADC) ligands. The solid-state luminescent properties of these diaminocarbene derivatives are attributed to their triplet-state metal/metal-to-ligand charge-transfer (3MMLCT) nature, which is driven by attractive intermolecular M···M interactions further reinforced by the intramolecular π–π interactions even in the ...
Added: September 16, 2024
Orlova E., Kostanyan L., Trukhacheva M. et al., CrystEngComm 2024 Vol. 26 No. 25 P. 3424–3430
The Sm2MoO6 compounds, also known as oxymolybdates, were synthesized in air using a solid-phase method. A series of techniques were employed to characterize the undoped and, for the first time, lead-doped samples. It has been demonstrated that lead-containing samples form a wide range of solid solutions, which are isostructural (sp. gr. C2/c) to the pure ...
Added: June 24, 2024
Varaksina E., Kiskin M., Konstantin A. Lyssenko et al., Physical Chemistry Chemical Physics 2021 Vol. 23 No. 45 P. 25748–25760
A series of europium and gadolinium complexes comprising a β-diketone moiety modified with a fluorinated side-group and thiophene ring have been designed and synthesized and a comparative study of their luminescence properties has been carried out. In this study, when the methyl side group was modified by sequential addition of fluorine substituents and then the ...
Added: November 1, 2022
Varvara O. Veselova, Gajtko O., Volodin V. et al., Advanced Powder Technology 2021 Vol. 32 No. 1 P. 175–185
A route for production of fine Bi4Ge3O12 (BGO) powder is sought after to lower the cost of scintillation
devices and make their shapes more versatile. A systematic study of highly dispersed BGO crystallization
under the hydrothermal-microwave (HTMW) conditions was carried out in the present work. Anionic,
cationic and non-ionic surfactants, chelating agents and polyols were used to modify ...
Added: October 23, 2022
Vinogradov A., Komarov P., Puntus L. et al., Inorganica Chimica Acta 2022 Vol. 533 Article 120777
Mono-3,4-diphenyl(9-anthracenyl)cyclopentadienyl dichloride complexes {[CpAntLn(thf)]2(µ2-Cl)2(µ3-Cl)3K(thf)}2 Ln = Nd, Gd, Tb, CpAnt = Ph2(C14H9)C5H2 were synthesized and structurally characterized. All the complexes were obtained in the form of tetranuclear ate complexes consisting of two [CpAntLn(thf)]2(µ2-Cl)2(µ3-Cl)3K(thf) units connected via two K–Cl bonds. In ]the Tb complex, anthracene fragments from two different molecules participate in the stacking interactions with a high degree of π-system overlap. ...
Added: February 9, 2022
Lyskov N.V., Shchegolikhin A. N., Stolbov D. N. et al., Electrochimica Acta 2022 Vol. 403 Article 139632
Stabilized fluorites and pyrochlores with different types of substitution in the (Nd2O3−ZrO2 system (NdZrO)) have been studied by Raman spectroscopy, X-ray diffraction, and impedance spectroscopy methods. Ionic and proton conductivity maps for 9 compositions in the NdZrO system are presented. Oxygen partial pressure measurements show a typical ionic conductor behavior, with a significantly increase of ...
Added: December 21, 2021
N.N.Grachev, Lazarev D. V., , in: 2016 International Siberian Conference on Control and Communications (SIBCON). Proceedings.: M.: HSE, 2016. P. 1–5.
Ways to improve the sensitivity and signal-to-noise ratio of primary converters in each case have their fundamental and practical limitations. To determine the optimal frequency of the electromechanical conversion and ensure the specified accuracy and stability of metrological characteristics are encouraged to use the method of probabilistic stability studies of the output characteristic of the ...
Added: September 29, 2016
Smirnov I. S., Novoselova E., Kondrashov P. E. et al., Diamond and Related Materials 1998 Vol. 7 P. 1647–1650
The characteristics of RAP crystal, metal-carbon multilayer X-ray mirror and diamond-like carbon (DLC) X-ray mirror are compared/ The advantages of DLC mirrors in resolution power are described. Temperature and radiation influence on the reflectivity and bandwidth of Bragg peak for diamond-like mirrors are studied. It is shown that the parameters of DLC mirrors after annealing ...
Added: March 26, 2013