Ресурсный центр «Магнитно-резонансные методы исследования»

Дж.Н. Коншина, А.В. Данилова, З.А. Темердашев, С.Н. Болотин, А.А. Гуринов, В.В. Коншин

“Получение и некоторые свойства силикагеля с иммобилизованной формазановой группой”

Журнал прикладной химии, 2016, 89(4), 476-483

Предложен и охарактеризован новый сорбционный материал — силикагель с ковалентно иммобилизованной формазановой группой, получаемый сочетанием иммобилизованной соли арилдиазония с фенилгидразоном бензальдегида. Определены некоторые равновесные и кинетические характеристики сорбции Cu(II), Co(II), Ni(II) и Cd(II) из растворов полученным модифицированным силикагелем, показана его эффективность для концентрирования Cu(II) из растворов сложного состава. По данным ЭПР определено координационное окружение Cu(II) в комплексе на поверхности сорбента.

D.N. Konshina, V.V. Open’ko, Z.A. Temerdashev, A.A. Gurinov, V.V. Konshin

“Synthesis of novel silica-gel-supported thiosemicarbazide and its properties for solid phase extraction of mercury”

Separation Sci. Tech., 2016, 51(7), 1103-1111
DOI:10.1080/01496395.2016.1143005

A new thiosemicarbazidе-modified silica gel (SG-THSC) sorbent was prepared. The sorbent was quantified by adsorption of mercury ions on silica gel, desorption and then spectrophotometry detection of mercury ions. The retention parameters (sample flow rate, eluent type, sample volume, presence of foreign ions, shaking time, sample flow rate and volume, eluent condition, interfering substances) were investigated. The quantitative recovery (>95%) of Hg(II) ions could be obtained by use of 5 mL of 6 mol L⁻¹ HCl. The adsorption capacity of SG-THSC was found to be 98.3 mg g^–1 at optimum pH. The maximum preconcentration factor was 400. The technique detection limit was 70 ng L^–1, and the relative standard deviation was lower than 4.0% (n = 6). The studied sorbent was applied to preconcentrate the trace Hg(II) from the mineralised residues of fish and seawater samples.

E.A. Katlenok, A.A. Zolotarev, A.Yu. Ivanov, S.N. Smirnov, R.I. Baichurin, K.P. Balashev

“Complexes of Ir(III) and Pt(II) with Cyclometallated 2-Phenylbenzothiazole and Chelating Diethyldithiocarbamate and O-Ethyldithiocarbonate Ions: Structures and Optical and Electrochemical Properties”

Rus. J. Coord. Chem., 2016, 42, 178-186
DOI:10.1134/S1070328416030039

It is shown by X-ray diffraction analysis, IR spectroscopy, and 1Н, 13С{1H}, and 195Pt NMR spectroscopy that the Pt(II) and octahedral Ir(III) complexes with metallated 2-phenylbenzothiazole and chelating diethyldithiocarbamate and O-ethyldithiocarbonate ions have the square and cis-C,C structure, respectively. The highest occupied and lowest unoccupied molecular orbitals of the complexes determining their long-wavelength absorption, phosphorescence, and one-electron oxidation and reduction are assigned to those predominantly localized on the mixed p(S)/d(M) and π* orbitals of the metallated ligand. The cathodic shift of the oxidation voltammogram and the bathochromic phosphorescence shift of the Pt(II) complex with the О-ethyldithiocarbonate ion are attributed to the enhanced donor–acceptor interaction of the donor S atoms of the ligand with Pt(II). The structural data are deposited with the Cambridge Crystallographic Data Centre (CIF files CCDC nos. 1058768 (Ia) and 1058767 (IIb)).