4-chloro-l-kynurenine as fluorescent amino acid in natural peptides

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4-chloro-l-kynurenine as fluorescent amino acid in natural peptides

Amino Acids. 2019. Vol. 50. No. 12. P. 1697–1705.

Алфёрова В. А., Shuvalov M., Сучкова Т., Проскурнин Г., Апарин И., Рогожин Е., Новиков Р., Сольев П., Чистов А., Устинов А., Tyurin A., Korshun V. A.

Research target: Chemistry

Priority areas: engineering science

Language: English

DOI

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When universal machine learning models fail in capacitance prediction for carbon-based supercapacitors: Leakage-aware validation and electrolyte screening

Makarov D. M., Kalikin N., Fashchevsky K. A. et al., Electrochimica Acta 2026 Vol. 579 Article 150159

Machine learning (ML) has become a powerful tool for accelerating the development of carbon-based supercapacitors; however, most published models assume that a single predictive framework can describe both conventional porous carbons and hybrid carbon electrodes. Here, we test this assumption using a comprehensive benchmark dataset and an extended literature-curated dataset enriched with synthesis- and electrolyte-related descriptors. Three ML algorithms ...

Added: October 13, 2026

Electrochemical reduction of cyanide on conjugated copper-organic framework Cu3(HHTP)2 monolayer: A dispersion-corrected DFT investigation.

Shi R., Yu Y., Chibisov A., International Journal of Hydrogen Energy 2025 Vol. 107 P. 52–62

Cyanide containing wastewater can cause livestock death and reduce agricultural production and electrochemical reduction of cyanide (CNRR) is a promising way to eliminate its harm and turn waste into valuable products. However, the reaction mechanism and function of electrocatalysts for CNRR have not been fully understood yet. Herein we identify a two-dimensional (2D) conductive copper-organic ...

Added: October 11, 2026

Advances in colloidal anisotropic nanocrystals for high-efficiency light-emitting diodes

Zhukov A., Chen F., Zeng Y. et al., Nanoscale 2026 Vol. 18 No. 36 P. 19223–19253

Colloidal semiconductor nanocrystals have emerged as promising materials for next-generation light-emitting diodes (LEDs) owing to their solution processability, tunable emission wavelengths, narrow emission linewidths, and high photoluminescence quantum yields. Among them, anisotropic nanocrystals, including one-dimensional nanorods (NRs) and two-dimensional nanoplatelets (NPLs), offer additional opportunities for controlling transition dipole moment orientation and light out-coupling efficiency. These ...

Added: October 2, 2026

Effect of the hydrogen bond donor nature on the extraction ability of a tributyl phosphate-based deep eutectic solvent

Мальцева В. Е., Ananyev I., Milevskii N. et al., Molecular Systems Design and Engineering 2026 Vol. 11 No. 7 P. 691–704

The use of hydrophobic deep eutectic solvents (DESs) as extractants for metal ion separation is largely due to the ease of their preparation and the possibility of modifying them depending on the composition of the metal mixture to be separated. However, the most common approach to DES modification involves the replacement of the extractant, while ...

Added: October 2, 2026

Crystal Structure and 35Cl NQR Spectroscopy in Сhlorinated closo-Dodecaborate Clusters {[(Me2CO)Ag(μ-Me2CO)2Ag(Me2CO)][μ-B12Cl12]}n and {[DMFAg(μ-DMF)2AgDMF][μ-B12Cl12]}n

Мальцева В. Е., Ananyev I., Golubev A. V. et al., Russian Journal of Inorganic Chemistry 2026 Vol. 71 P. 724–736

Two voluminous polymer silver(I) salts of perchlorinated dodecoborate clusters, {[(Me2CO)Ag(μ-Me2CO)2Ag(Me2CO)][μ-B12Cl12]}n (1) and {[DMFAg(μ-DMF)2AgDMF][μ-B12Cl12]}n (2) were synthesized. The 35Cl nuclear quadrupole resonance (NQR) spectroscopy supplemented with the X-ray diffraction data was applied for identifying and analyzing noncovalent interactions Cl···X in these salts. Whereas in X-ray diffraction, noncovalent interactions are associated with the presence of the shortened ...

Added: October 2, 2026

High-Resolution X‑ray Diffraction of TeII-Centered Chalcogen Bonds: Direct Visualization of σ–Holes and Quantitative Bonding Analysis

Мальцева В. Е., Rozhkov A., Ananyev I. et al., Inorganic Chemistry 2026 Vol. 65 No. 22 P. 12484–12496

Despite the well-established importance of chalcogen bonding in crystal engineering and supramolecular chemistry, experimental charge density data for TeII-centered chalcogen bonds have remained entirely absent, leaving the electronic nature of these interactions uncharacterized at the level of directly measured electron density. Here, we report the first high-resolution X-ray diffraction (HRXRD) study of TeII-centered chalcogen bonds, ...

Added: October 2, 2026

High Temperature Oxidation Resistance of Off-Stoichiometric (Ni39.6Co29.3Cr10Al15.8Ta3.3Nb2)98.5B1.5 Chemically Complex Intermetallic Alloy

Ostovari Moghaddam A., Mehrabi-Kalajahi S., Solizoda I. A. et al., Metals and Materials International 2026 P. 1–9

Off-stoichiometric boron-doped chemically complex intermetallic alloys (CCIMAs) have recently emerged as a new avenue for overcoming the low temperature brittleness of ordered superlattices. However, their behavior at high temperatures remains unexplored. In this study, a novel (Ni39.6Co29.3Cr10Al15.8Ta3.3Nb2)98.5B1.5 CCIMA was prepared and its oxidation resistance over a wide temperature range (500 °C–950 °C) was studied. The ...

Added: October 1, 2026

MPI+OpenMP implementation of resolution-of-the-identity Hartree-Fock method exploiting permutational symmetry of three-center electron repulsion integrals

Kashpurovich I., Oleynichenko A., Stegailov V., Supercomputing Frontiers and Innovations 2026 Vol. 13 No. 1 P. 52–73

We report a high-performance implementation of the resolution-of-the-identity Hartree–Fock method that fully exploits the permutational symmetry of three-center electron repulsion integrals (ERI). The present implementation adopts a hybrid MPI+OpenMP parallelization strategy. Two different algorithmic approaches (with and without the pre-transformation of ERIs) are compared. A custom data layout introduced previously is employed. Designed to efficiently ...

Added: September 28, 2026

Thermodynamic Stabilization of PbS Quantum Dots for High-Performance Short-Wave Infrared Photodetection

Li Y., Han J., Zaman N. et al., ACS Applied Materials & Interfaces 2026 Vol. 18 No. 39 P. 54241–54251

The development of lead sulfide (PbS) quantum dot (QD) photodetectors for short-wave infrared (SWIR) applications has been fundamentally limited by the thermodynamic instability of large PbS QD facets, which leads to aggregation and epitaxial fusion. In this work, robust thermodynamic stabilization was achieved by introducing methylammonium chloride (MACl) in PbS QD surface passivation, as validated ...

Added: September 26, 2026

Perovskite nanoparticles Cs4PbBr6 and CsPbBr3: synthesis, analysis and peculiar optical properties

Гущина В. А., / Series chemrxiv-2023-vpzhz-v2 "ChemRxiv". 2023.

All-inorganic perovskite CsPbBr3 and Cs4PbBr6 nanoparticles are being intensively studied due to their unique properties and wide range of applications; however, however, the nature of their optical properties is not yet fully understood due to the difficulty of synthesis of singlephase nanoparticles. In this article we describe the features of the synthesis of single-phase particles ...

Added: May 14, 2026

Algorithmic overlaps as thermodynamic variables: from local to cluster Monte Carlo dynamics in critical phenomena

Pilé I., Deng Y., Shchur L., / Series arXiv "math". 2026. No. 2604.10254.

We investigate the spatial overlap of successive spin configurations in Markov chain Monte Carlo simulations using the local Metropolis algorithm and the Svendsen-Wang and Wolff cluster algorithms. We examine the dynamics of these algorithms for two models in different universality classes: the Ising model and the Potts model with three components. The overlap of two ...

Added: April 20, 2026

Rare Earth Oxohydroxyglycinates: the Possible Missing Link between Rare Earth Oxides and Hydroxides

Baranchikov A., Teplonogova M., Kozlova A. et al., European Journal of Inorganic Chemistry 2026 P. 1–12

Rare earth oxides (RE2O3) were found to react with glycine in an aqueous medium at rather low temperatures (60°С–120°С), forming rare earth oxohydroxyglycinates, RE2O(OH)3(NH2CH2COO)·H2O, with a previously unknown crystal structure. The structure of the europium oxohydroxyglycinate was determined using powder X-ray diffraction. Its layered structure and ability for anion exchange under mild conditions, namely the ...

Added: February 25, 2026

The role of spacer heteroatomic fragment in spectroscopic and luminescent behaviour of phenyl-substituted phthalocyanine complexes

Erzunov D., Alekseeva A., Sarvin I. et al., Journal of Porphyrins and Phthalocyanines 2024 Vol. 28 No. 09n10 P. 701–709

Peripheral phenyl-substituted metal phthalocyanines with thio and oxa substitution in the spacer bridge fragment were obtained in the work. Spectroscopic properties were studied for the obtained complexes, and the main patterns of behavior and characteristics change depending on the solvent and the nature of the spacer atom. It is shown that the replacement of an oxygen ...

Added: September 16, 2025

Наноразмерные системы фолиевая кислота-амфифильный сополимер N-винилпирролидона с метакриловой кислотой, разветвленный диметакрилатом триэтиленгликоля

Курмаз С. В., Иванова И., Фадеева Н. В. et al., Известия Академии наук. Серия химическая 2023 Т. 72 № 6 С. 1349–1365

Polymer compositions of folic acid based on an amphiphilic copolymer of N-vinylpyrrolidone with methacrylic acid branched with triethylene glycol dimethacrylate have been developed and characterized by the methods of DLS, 1H NMR, IRS, DSC and TGA in solutions and in solid state. The effective binding constants of folic acid to copolymer in isopropyl alcohol and ...

Added: September 14, 2025

Doping dependence of low-energy charge collective excitations in high-Tc cuprates

Kagan M., Silkin V. M., Efremov D. V., / Series arXiv "math". 2024. No. 2411.12836.

In this study, we analyze the dielectric function of high-Tc cuprates as a function of doping level, taking into account the full energy band dispersion within the CuO2 monolayer. In addition to the conventional two-dimensional (2D) gapless plasmon mode, our findings reveal the existence of three anomalous branches within the plasmon spectrum. Two of these branches ...

Added: November 27, 2024

Influence of anisotropy on the study of critical behavior of spin models by machine learning methods

Sukhoverkhova D., Shchur L., / Series arXiv "math". 2024. No. 2410.14523.

In this paper, we applied a deep neural network to study the issue of knowledge transferability between statistical mechanics models. The following computer experiment was conducted. A convolutional neural network was trained to solve the problem of binary classification of snapshots of the Ising model's spin configuration on a two-dimensional lattice. During testing, snapshots of ...

Added: October 21, 2024

Comparison of the microcanonical population annealing algorithm with the Wang-Landau algorithm

Mozolenko V., Fadeeva Marina, Shchur L., / Series arXiv "math". 2024. No. 2405.10865.

The development of new algorithms for simulations in physics is as important as the development of new analytical methods. In this paper we present a comparison of the recently developed microcanonical population annealing (MCPA) algorithm with the rather mature Wang-Landau algorithm. The comparison is performed on two cases of the Potts model exhibiting a first ...

Added: May 20, 2024

Majorana modes and Fano resonances in Aharonov- Bohm ring with topologically nontrivial superconducting bridge

Kagan M., Аксёнов С. В., / Series Research Square "Research Suqare". 2024. No. 1.

We study different resonances (first of all of the Fano type) in the interference device formed by the Aharonov-Bohm ring with superconducting (SC) wire in the topologically nontrivial state playing a role of a bridge between top and bottom arms. We analyze Majorana modes on the ends of the SC wire and show that the collapse of the ...

Added: April 10, 2024

STUDY OF THE EFFECT OF LOW RADIATION DOSES ON THE INTENSITY OF WHEAT GERMINATION

Iliukhin R., Timakova R. T., Ilyukhina Y. V., XXI век: итоги прошлого и проблемы настоящего плюс 2022 Vol. 11 No. 59 P. 0

The technology of controlled germination as a result of radio stimulation of wheat grains of the L-503 soft spring variety made it possible to establish optimal stimulating doses ranging from 9 Gy to 13 Gy of radiation. As a result of the study, it was found that the use of optimal radiation doses provides high ...

Added: April 4, 2024

High-frequency dielectric anomalies in a highly frustrated square kagome lattice nabokoite family compounds ACu7(TeO4)(SO4)5Cl (A=Na, K, Rb, Cs)

Ребров Я. В., Glazkov V., Murtazoev A. F. et al., / Series cond-mat "arxiv.org". 2023.

Nabokoite family compounds ACu7(TeO4)(SO4)5Cl (A=Na, K, Cs, Rb) are one of the candidates for the evasive spin-liquid state predicted for highly-frustrated square kagome lattice (SKL). Their magnetic subsystem includes SKL layers decorated by additional copper ions. All members of this family are characterized by quite high Curie-Weiss temperatures (∼80−200 K), but magnetic ordering was reported ...

Added: January 29, 2024

A synthetic route to artificial chiral α-amino acids featuring a 3,4-dihydroisoquinolone core through a Rh(iii)-catalyzed functionalization of allyl groups in chiral Ni(ii) complexes

Arsenov M., Stoletova N., Smol'yakov A. et al., Organic and Biomolecular Chemistry 2023 Vol. 21 No. 46 P. 9143–9149

Currently, non-proteinogenic α-amino acids (α-AAs) have attracted increasing interest in bio- and medicinal chemistry. In this context, the first protocol for the asymmetric synthesis of artificial α-AAs featuring a 3,4-dihydroisoquinolone core with two stereogenic centers was successfully elaborated. A straightforward Rh(III)-catalysed C–H activation/annulation reaction of various aryl hydroxamates with a set of robust and readily ...

Added: January 18, 2024

Nondestructive KPFM-assisted Quality Control in Fabrication of GaAs High-Speed Electronics

Shurakov A., Kaurova N., Belikov I. et al., / Series Physics "arxiv.org". 2022.

In this paper, we report on the method of nondestructive quality control that can be used in fabrication of GaAs high-speed electronics. The method relies on the surface potential mapping and enables rigid in vivo analysis of transport properties of an active electronic device incorporated into a complex integrated circuit. The study is inspired by ...

Added: September 15, 2023

Facile Synthesis of Amino Acid Decorated Water-Soluble Fullerene Derivatives with Anti-influenza Activity†

Bolshakova V. S., Sinegubova E. O., Esaulkova Y. L. et al., Chinese Journal of Chemistry 2023 Vol. 41 No. 15 P. 1803–1808

Herein, we present a facile synthesis of amide-type water-soluble fullerene derivatives decorated with five residues of amino acids. As compared to the previously developed approaches, the proposed method enables usage of a broad range of amino acids, includ-ing those unstable under Friedel-Crafts reaction conditions. Furthermore, it is fully tolerant to the nature of the sixth ...

Added: June 19, 2023

Superconducting spin valves based on a single spiral magnetic layer

Pugach N., Safonchik M. O., Belotelov V. et al., / Series "cond-mat". 2022. No. 2110.00369.

A detailed investigation of a superconducting spin-triplet valve is presented. This spin-valve consists of a superconducting film covering a metal with an intrinsic spiral magnetic order, which could result from competing isotropic exchanges or, if the crystal lattice breaks central symmetry, from asymmetric Dzyaloshinskii-Moriya exchange. Depending on the anisotropy, such a metal may change its ...

Added: November 16, 2022