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Single-Ion Magnetism of the [DyIII(hfac)4]− Anions in the Crystalline Semiconductor {TSeT1.5}●+[DyIII(hfac)4]− Containing Weakly Dimerized Stacks of Tetraselenatetracene
International Journal of Molecular Sciences. 2024. Т. 25. № 25. С. 8068.
Flakina A., Nazarov D., Faraonov M., Yakushev I., Kuzmin A. V., Хасанов С. С., Zverev V., Otsuka A., Yamochi H., Kitagawa H., Konarev D.
The oxidation of tetraselenatetracene (TSeT) by tetracyanoquinodimethane in the presence of dysprosium(III) tris(hexafluoroacetylacetonate), DyIII(hfac)3, produces black crystals of {TSeT1.5}●+[DyIII(hfac)4]− (1) salt, which combines conducting and magnetic sublattices. It contains one-dimensional stacks composed of partially oxidized TSeT molecules (formal averaged charge is +2/3). Dimers and monomers can be outlined within these stacks with charge and spin density redistribution. The spin triplet state of the dimers is populated above 128 K with an estimated singlet-triplet energy gap of 542 K, whereas spins localized on the monomers show paramagnetic behavior. A semiconducting behavior is observed for 1 with the activation energy of 91 meV (measured by the four-probe technique for an oriented single crystal). The DyIII ions coordinate four hfac− anions in [DyIII(hfac)4]−, providing D2d symmetry. Slow magnetic relaxation is observed for DyIII under an applied static magnetic field of 1000 Oe, and 1 is a single-ion magnet (SIM) with spin reversal barrier Ueff = 40.2 K and magnetic hysteresis at 2 K. Contributions from DyIII and TSeT●+ paramagnetic species are seen in EPR. The DyIII ion rarely manifests EPR signals, but such signal is observed in 1. It appears due to narrowing below 30 K and has g4 = 6.1871 and g5 = 2.1778 at 5.4 K.
Flakina A. M., Nazarov D., Faraonov M. et al., International Journal of Molecular Sciences 2024 Vol. 25 No. 15 Article 8068
The oxidation of tetraselenatetracene (TSeT) by tetracyanoquinodimethane in the presence of dysprosium(III) tris(hexafluoroacetylacetonate), DyIII(hfac)3, produces black crystals of {TSeT1.5}●+[DyIII(hfac)4]− (1) salt, which combines conducting and magnetic sublattices. It contains one-dimensional stacks composed of partially oxidized TSeT molecules (formal averaged charge is +2/3). Dimers and monomers can be outlined within these stacks with charge and spin ...
Added: September 14, 2026
Kuzmin A. V., Flakina A., Nazarov D. et al., Crystal Growth & Design 2025 Vol. 25 P. 6332 –6344
Oxidation of tetraselenatetracene (TSeT) and bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) by p-chloranil in the presence of metal hexafluoroacetylacetonates: MnII(hfac)₂, CoII(hfac)₂ and PrIII(hfac)₃ followed by precipitation of crystals by n-hexane produces (TSeT₁.₅)⁺{MnII(hfac)₃⁻} (1), (TSeT₁.₅)⁺{PrIII(hfac)₄⁻} (3), (TSeT₂)⁺{CoII(hfac)₂Cl⁻} (4), and (ET₃)⁺{MnII(hfac)₃⁻} (5). Thioindigo dye is introduced into (TSeT₁.₅)⁺(Thioindigo₁.₅){MnII(hfac)₃⁻} (2) due to the appearance of specific C=O···(Se−Se bond) interactions accompanied by the ...
Added: May 6, 2026
Kalle P., Bezzubov S., Vener M. et al., Crystal Growth & Design 2025 Vol. 25 No. 20 P. 8658–8664
Sodium acetate (NaOAc), a simple and widely used compound, has been studied structurally in several works; still, uncertainties concerning its polymorphism remain. In the present study, the crystallization conditions of the known polymorphs of anhydrous NaOAc were clarified, whereas their crystal structures were corrected. Two new polymorphs were discovered, one of which (NaOAc II) crystallizes ...
Added: October 15, 2025
Кузьминых И. О., Kuzin A., Флоря И. Н. et al., Нано- и микросистемная техника 2025 Т. 27 № 4 С. 184–194
В работе рассмотрены основные варианты детектирования водорода, а также приведены требования, которые предъявляются к сенсорам водорода. Проанализированы преимущества и недостатки существующих решений по детектированию водорода и проведен сравнительный анализ основных метрик коммерчески доступных сенсоров водорода. Было установлено, что оптические сенсоры преодолевают основную проблему существующих сенсоров – использование электрического тока в чувствительной зоне сенсоров. Данная обзорная ...
Added: April 30, 2025
A.S. Ilin, Strugova A. O., I.A. Cohn et al., PHYSICAL REVIEW MATERIALS 2024 Vol. 8 No. 7 Article 074801
Superconductivity has been found in RuN films obtained by reactive magnetron sputtering. This novel member of the metal nitride superconductors family has a critical temperature of the superconducting transition that varies depending on the substrate, ranging from 0.77 K to 1.29 K. The parameters of the crystal lattice of the superconducting films have been determined: ...
Added: February 25, 2025
Ahmad Ostovari Moghaddam, Zaitseva O., Uporov S. et al., Iranian Journal of Materials Science and Engineering 2024 Vol. 21 No. 3 P. 16–22
High entropy intermetallic compounds (HEICs) are an interesting class of materials combining the
properties of multicomponent solid solutions and the ordered superlattices in a single material. In this work,
microstructural and magnetic properties of (CoCuFeMnNi)Al, (CoCuFeMnNi)Zn3, (FeCoMnNiCr)3Sn2,
(FeCoNiMn)3Sn2 and Cu3(InSnSbGaGe) HEICs fabricated by induction melting are studied. The magnetic
properties of the HEICs were determined mainly by the nature ...
Added: January 12, 2025
Alexander E. Baranchikov, Kozlova T., Sergey Ya. Istomin et al., ChemistrySelect 2024 Vol. 9 No. 17 Article e202401010
A previously unknown double ceric sodium phosphate hydrate Na1.97Ce1.03(PO4)2 ⋅ xH2O containing both ceric and cerous cations was obtained by the hydrothermal treatment of amorphous ceric phosphate mixed with a sodium hydroxide aqueous solution. The presence of Ce3+ in the structure was proved by HERFD-XANES and ESR spectroscopy. Iterative transformation factor analysis of HERFD-XANES data allowed estimating ...
Added: December 26, 2024
Deltsov I., Ivan V. Ananyev, Meerov D. et al., Journal of Organic Chemistry 2023 Vol. 89 No. 1 P. 174–182
A majority of known and newly synthesized energetic materials comprise polynitrogen or nitrogen–oxygen heterocycles with various explosophores. However, available structural combinations of these organic scaffolds are finite and are about to reach their limits. Herein, we present the design and synthesis of a series of sulfur-containing polyazole structures comprising 1,3,4-thiadiazole and furazan rings linked by ...
Added: June 24, 2024
Осинцева С. В., Семейкин О. В., Долгушин Ф. М. et al., Координационная химия 2023 Т. 49 № 12 С. 790–800
При получении рутениевого димера [Ru(CO)2Cp]2 в термической реакции циклопентадиена с Ru3(CO)12 как минорный продукт получен тетраядерный кластер [Ru(μ3-CO)Cp]4 (I). Для кластера I проведены спектральные (ЯМР 13С и 1H, ИК) и структурные исследования. Кристаллизацией I в разных условиях получены два типа темно-вишневых кристаллов, самого кластера Iа и его тетрагидрата Iб, строение которых установлено методом РСА (CCDC № 2241197 и 2241199 соответственно). На основании ...
Added: June 24, 2024
Vorobyova A., Shilov A. I., Boltalin A. I. et al., Mendeleev Communications 2021 Vol. 31 No. 3 P. 356–358
A new protic ionic liquid (Tс = 14±1 °C) – pyridinium hydrogen dinitrate – was obtained at room temperature from a solution of pyridinium nitrate in anhydrous nitric acid in a desiccator over P2O5. Single crystal X-ray diffraction study revealed that the solid state structure of [(PyH)2(NO3)][H2(NO3)3] consists of hydrogen bonded cations [(PyH)2(NO3)]+ and anions ...
Added: June 5, 2024
Danilovich I. L., Deeva E. B., Bukhteev K. Y. et al., Physical Review B: Condensed Matter and Materials Physics 2020 Vol. 102 No. 9 P. 0
The low-dimensional magnetic systems tend to reveal exotic spin-liquid ground states or form peculiar types of long-range order. Among systems of vivid interest are those characterized by the triangular motif in two dimensions. The realization of either ordered or disordered ground state in triangular, honeycomb, or kagome lattices is dictated by the competition of exchange ...
Added: June 5, 2024
Андрюшкин В. В., Dragunova A., Komarov S. et al., Научно-технический вестник информационных технологий, механики и оптики 2022 Т. 22 № 5 С. 921–928
The results of the study of the optical properties of low-density InGaPAs quantum dots, as well as the effect of low temperatures and thermal annealing parameters on their optical and structural properties were presented. InGaPAs quantum dots were formed by substituting phosphorus with arsenic in InGaP layer directly during epitaxial growth. The optical properties of ...
Added: June 3, 2024
Song Y., Chen M., Xie X. et al., Nano Energy 2024 Vol. 127 Article 109763
The stability of the dumbbell structure has been confirmed by previous theory and experiment. Based on first-principles calculations, we proposed hexagonal dumbbell graphene (HDB C10) and rectangular dumbbell graphene (RDB C10) monolayers containing periodically raised C (CR) atoms. They turn out to have high mobility semiconductor properties. By adsorbing H atoms on these CR atoms, ...
Added: May 24, 2024
Petr A. Buikin, Ivan S. Lunkov, Ilyukhin A. et al., Polyhedron 2024 Vol. 264 Article 117223
Solid solutions of 4-methylpyridinium bromoiodobismuthates have been isolated from aqueous solutions and structurally characterized. It was found that the composition of the resulting solid solutions [PiH]4Bi2X10, [PiH]BiX4 и [PiH]3Bi2X9 (PiH = 4-methylpyridinium; X = Br, I) depends on the ratio of organic cation/bismuth and bromine/iodine in the initial solution. The existence of two polymorphic modifications ...
Added: May 24, 2024
Buikin P., Zhavoronkov A. S., Ilyukhin A. B. et al., Russian Journal of Inorganic Chemistry 2024 Vol. 69 No. 2 P. 172–177
Solid solutions of pyridinium bromo-iodobismutates were isolated from aqueous solutions and structurally characterized. The composition of the resulting solid solutions [HPy]BiX4 and [HPy]3Bi2X9 (X = Br, I) was found to depend on the ratios of pyridinium/bismuth and bromine/iodine in the initial solution. The existence of five polymorphic modifications in the system for [HPy]BiX4 compounds was ...
Added: May 24, 2024
Ekaterina M. Dudko, Petr A. Buikin, Ilyukhin A. et al., CrystEngComm 2024 Vol. 26 P. 3490–3500
Eight new solvates of 1,1'-(1,4-phenylenebis(methylene))bis(1-pyridinium)) hybrid halobismuthates were obtained from the dimethyl sulfoxide (DMSO) and dimethylformamide (DMF) solutions and structurally characterized. The thermal stability of the solvates was studied using TGA/DSC methods and the appropriate conditions for the solvent molecules loss were defined. As a result, five new hybrid halobismuthates were prepared by the thermal ...
Added: May 24, 2024
Kuzovnikov M., Antonov Vladimir E., Kulakov V. et al., PHYSICAL REVIEW MATERIALS 2023 Vol. 7 No. 2 Article 024803
Zirconium trihydride and, for comparison, trideuteride with hexagonal close-packed (hcp) metal lattices
were synthesized at a hydrogen/deuterium pressure of 9 GPa and a temperature of 873 K using toroid-type
high-pressure chambers. After a rapid cooling (quenching) to 100 K and lowering the pressure to atmospheric,
the quenched sample was removed from the chamber and studied by hot extraction ...
Added: February 13, 2024
Guzelia I. Sadrtdinova, Daniil A. Bardonov, Konstantin A. Lyssenko et al., Mendeleev Communications 2023 Vol. 33 No. 3 P. 357–359
Mononuclear [CpNd(BH4)2L] borohydrides comprising
L = 1,3,5-trimethyl-1,3,5-triazacyclohexane (Me3tach) and
L = 1,4,7-trimethyl-1,4,7-triazacyclononane (Me3tacn) were
obtained and structurally characterized. Their catalytic
activity in coordination–insertion ring-opening polymerization
of e-caprolactone was studied. ...
Added: January 18, 2024
Makhaneva A. Y., Zakharova E., Nesterenko S. et al., Journal of Solid State Chemistry 2023 Vol. 322 Article 123969
Mixed calcium-platinum phosphide CaPt4P6 was synthesized using flux-assisted high-temperature ampoule
technique. According to single-crystal XRD data it crystallizes in the monoclinic space group C2/c with Z ¼ 4 (a ¼
8.1361(3) Å, b ¼ 7.9489(3) Å, c ¼ 11.3803(5) Å, β ¼ 90.860(2)o, R1 ¼ 0.0240, wR2 ¼ 0.0618) and belongs to the
BaPt4As6 structure type, the structure ...
Added: October 23, 2023