
Victoria GontcharenkoNational Research University Higher School of Economics | HSE · Department of Chemistry
Victoria Gontcharenko
Master of Science
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44
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Publications
Publications (44)
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...
A novel method for identifying counterfeit goods based on the difference between photobleaching rates of spectroscopic marker components is proposed. Controlled photobleaching of the dye is achieved via introduction of...
The reaction of 1,3-diketone containing 1-methyl-1H-pyrazol-4-yl and perfluoropropyl fragments with TbCl3·6H2O in the presence of NaOH in ethanol is studied. The molecular and crystal structures of the complex are studied by single-crystal X-ray diffraction (XRD). Compound [Tb(L)3(EtOH)2] crystallizes in the triclinic crystal system with the space...
In pursuit of identifying potential less toxic hybrid compounds suitable for optoelectronic applications, we have synthesized a novel homopiperazinium bromoantimonate(III), (C5H14N2)3{Sb2Br9}2. It crystalizes easily from a hydrobromic acid aqueous solution...
The three isomeric fluorinated bipyridyldicarboxamides were studied for impact of fluorine atom position on structure, stability, Am(III)/Ln(III) separation, and photophysical properties of their complexes. The complexes of the fluorinated amides...
Dinuclear complexes bearing Ru(II) photoactive centers are of interest for the development of efficient dual catalysts for many photocatalyzed reactions. Ditopic polypyridine ligands, bis(pyridine-2-yl)amino-1,10-phenanthrolines, containing an additional coordination site (bis(pyridine-2-yl)amine,...
Dinuclear complexes bearing Ru(II) photoactive center are of interest for the development of efficient dual catalysts for many photocatalyzed reactions. Ditopic polypyrine ligands – bis(pyridine-2-yl)amino-1,10-phenanthrolines – containing additional coordination site (bis(pyridine-2-yl)amine, dpa) at positions 3, 4 or 5 of 1,10-phenanthroline core...
The development of luminescent molecular materials has advanced rapidly in recent decades, primarily driven by the synthesis of novel emissive compounds and a deeper understanding of excited-state mechanisms. Herein, we...
Based on phosphoryl‐substituted ynones and o‐phenylenediamines and varying reaction conditions (noncatalytic conditions or one‐pot Au‐catalyzed hydration and condensation), efficient methods for divergent synthesis of two different types of heterocyclic compounds ‐ benzo[b][1,4]diazepin‐2‐yl)phosphonates and (quinoxalin‐2‐yl)methylphosphonates‐ hav...
The six new trinuclear fluorocarboxylates with tetrahydrofuran (THF) molecules as terminal ligands are presented. The structures of compounds have been determined by single-crystal X-ray diffraction. According to the structure data, complexes of nickel (II) and cobalt (II) form isomorphous series, namely [K(CF 3 COOH) 6 ][M 3 (μ 3 -F)(CF 3 COO) 6 (...
A series of cyclometalated complexes of ruthenium (II) with four different substituents in the aryl fragment of benzimidazole was synthesized in order to study the effect of substituent donation on the electronic structure of the substances. The resulting complexes were studied using X-ray diffraction, NMR spectroscopy, MALDI mass spectrometry, ele...
Six new complexes of the ligand HQ cy (-4-(cyclohexanecarbonyl)-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one) and Ln 3+ ions with emission in the near-infrared (Nd 3+) or visible and near-infrared (Sm 3+ , Pr 3+) spectral regions were synthesized and characterized using various methods , including single crystal X-ray diffraction. The study demon...
A new type of neutral mixed‐valence system was synthesized using a facile one‐pot procedure. The spiro‐conjugated framework is additionally “fastened” with a biphenyl bridge, which does not directly participate in spin delocalization but makes the molecule stable and influences the reorganization energy and the energy barrier of the intramolecular...
Complexes emitting in the blue spectral region are attractive materials for developing white-colored light sources. Here, we report the luminescence properties of novel coordination compounds based on the trivalent group 3, 13 metals, and the 1-phenyl-3-methyl-4-cyclohexylcarbonyl-pyrazol-5-onate (QCH) ligand. [M(QCH)3] (M = Al, Ga, and In), [M(QCH...
Two new hybrid iodoantimonates(iii), (3-C5H12NO)4[Sb4I16] · 2 H2O (1, 3-C5H12NO+ is 3-hydroxypiperidinium) and (4-C5H12NO)4[Sb4I16] · 3 H2O (2, 4-C5H12NO+ is 4- hydroxypiperidinium), were synthesized. Their crystal structures were established. The anionic substructures of the new compounds are composed of the same tetranuclear complex anions [Sb4I1...
New organic-inorganic hybrid halometallates of the general formula (HpipeH2)-[M2X10] · 2H2O, where M = Sb, Bi; X = Br, I; Hpipe is homopiperazine (C5N2H12), were synthesized. The crystal structures of three new compounds, α-(HpipeH2)2[Sb2I10] · 2H2O (1), β-(HpipeH2)2[Sb2I10)]-2H2O (2), and (HpipeH2)2[Bi2Br10] · 2H2O (3), were determined and analyze...
In searching for a tool for optimizing the band gap of a hybrid compound capable of serving as a light-harvesting material in lead-free photovoltaics, we synthesized a new polyiodoantimonate (HpipeH2)2[Sb2I10](I2) and analyzed its crystal and electronic structure by application of X-ray crystal structure analysis, Raman and diffuse reflectance spec...
The influence of the degree of π-conjugation in biaroylmethane ligands upon Eu3+ luminescence efficiency in corresponding neutral tris-complexes was investigated in depth. The data obtained by both steady-state and time-resolved luminescence measurements gave an inside into electronic energy transfer mechanisms in the abovementioned complexes. It w...
Pentabromobenzoate is a useful fragment in organic synthesis and in coordination chemistry. Among known synthetic approaches to pentabromobenzoic acid (PBA), we have assessed and identified exhaustive bromination of benzoic acid by using 1.3-dibromoisocyanuric acid in concentrated H2SO4 solution as the most efficient method for the preparation of P...
A binuclear gadolinium (III) complex was obtained through the interaction of GdCl3·6H2O, 4,4,4-trifluoro-1-(1-methyl-1H-pyrazol-4-yl)butane-1,3-dione and NaOH in MeOH solution. Molar ration of reagents equal to 1:3:3 was used. Upon recrystallization of wet 1,4-dioxane, an intermediate hydrated complex formed stable crystalline solvate with the comp...
Two new compounds, namely {(NMe2H2)}[Ln(TDA)(HCOO)]*0.5H2O, Ln=Sm3+ (Sm-TDA) and Gd3+ (Gd-TDA), TDA3- is the anion of the 1H-1,2,3-triazole-4,5-dicarboxylic acid (H3TDA) were synthesized by the solvothermal method in a DMF:H2O mixture. According to single-crystal X-ray diffraction data, the compounds are 3d-MOFs with an anionic lattice and dimethyl...
New complex [RuL(Dmdcbp) 2 ]PF 6 ( I ) is synthesized by the consecutive reactions of [Ru- p -cymene] 2 Cl 4 with 3,3',5,5'-tetramethyl-1,1'-biphenyl-4,4'-bipyrazole (L) and 4,4'-dicarboxy-2,2'-bipyridine in a methanol–chloroform medium. The composition of complex I is confirmed by NMR and elemental analysis, and the optical and luminescence proper...
Electroluminescence complexes based on ytterbium and 5-methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-2,4-dihydro-3H-pyrazol-3-one (HL) ligand and various diimine-type ancillary ligands (2,2-bipyridine, bathophenanthroline, 1,10-phenanthroline) have been synthesized, and corresponding crystals were investigated. [Yb(L)3(bipy)] and [Yb(L)3(bath)] complex...
New pyrazole-based carboxylic ligand 1-(carboxymethyl)-1H-pyrazole-3,5-dicarboxylic acid (H3L) as well as its lanthanide complexes [LnL(H2O)2]n, Ln=La (1), Ce (2), Pr (3), Nd (4), Sm (5), Eu (6), Gd (7), Tb (8) and [LnL(H2O)]n, Ln= Dy (9), Ho (10), Er (11), Tm (12), Yb (13), Lu (14) have been prepared and studied. Compounds 1-8 represent a 3D polym...
The oxidation reaction of 3,3′,5,5′-tetramethyl-1H,1′H-4,4′-bipyrazole in the HNO3–Fe3+ system unexpectedly resulted in the formation of 1Н-pyrazole-3,4,5-tricarboxylic acid (H3PTCA) isolated as acid sodium salt Na(H2O)2H2PTCA. The compound has a polymeric structure stabilized by rare seven-membered Н-bonded rings
A series of novel imidazole-containing ligands and their organotin complexes were synthesized and characterized by NMR, IR, MALDI and elemental analysis. Redox behavior was studied by cyclic voltammetry (CV). Antioxidant properties were estimated in model reactions of single-electron reduction (CUPRAC-test), scavenging of 2,2-diphenyl-1-picrylhydra...
Ytterbium complexes Yb(LX)(HLX) with 2-tosylamino-4-bromobenzylidene-X-benzoylhydrazones (H2LH, X = H; H2LF, X = F; H2LI, X = I) were obtained, their luminescent properties characterized. Halogenation resulted in the increase of solubility (up to 24 g/L in THF) and quantum yield (up to 1.9%). High solubility and high quantum yields resulted in succ...
Three novel lanthanide complexes with the ligand 4,4-difluoro-1-(1,5-dimethyl-1H-pyrazol-
4-yl)butane-1,3-dione (HL), namely [LnL3(H2O)2], Ln = Eu, Gd and Tb, were synthesized, and, according to single-crystal X-ray diffraction, are isostructural. The photoluminescent properties of these compounds, as well as of three series of mixed metal complexe...
In this study, two novel Pr3+ complexes with different 1,3-diketonate ligands were synthesized and investigated. To study the effect of the ancillary ligand on the energy transfer mechanisms in the complexes, a phenanthroline ligand was introduced. To take into account the influence of the ligand environment composed of different ligands on the ene...
Abstract—Complexes {[(Zn(Bbtm)(H2O)4](NO3)2}n (I) and [Cu(Вbtm)(NO3)2]n (II) are formed due to the reactions of solutions of zinc and copper(II) nitrates with the bis(1,1'-1,2,3-benzotriazolyl)methane ligand
(Bbtm). Their crystal structures are determined by X-ray diffraction analysis (CIF files ССDС nos. 1963126 (I) and 1963127 (II)). Complex I is...
Complexes {(NMe2H2)[Ln(TDA)(HCOO)] ∙ 0.5H2O)} are prepared by the solvothermal synthesis in a water–dimethylformamide (1 : 1) system from a mixture of 1,2,3-triazole-4,5-dicarboxylic acid (H3TDA), NaOH, and Ln(NO3)3 (Ln = Eu, Gd). The crystal structure of the europium complex is determined by X-ray structure analysis (CIF file CCDC no. 1939689). Th...
Three novel coordination compounds based on 2,4,6-tris(1H-pyrazolyl)-l,3,5-triazine ligand (PzTz), namely [Ln(PzTz)(NO3)3(H2O)] (Ln = Eu, Gd, Tb) were synthesized and spectroscopically and structurally characterized. X-ray diffraction experiments revealed the monomeric nature of the complexes exhibiting either “sphenocorona” or bicapped square anti...
Applied methods for detecting water impurities in organic solvents, such as Fischer titration, include wayward equipment and toxic reagents. This method is inapplicable for detecting H2O in D2O, but suitable techniques like NMR-, IR-, and mass-spectrometry are costly. We report a low-cost, novel luminescent sensor material based on terbium-europium...