Рецензирование статей осуществляется на основании Положения о рецензировании статей и материалов для опубликования в Межвузовском сборнике научных трудов «Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов». Официальный сайт издания в сети Интернет: https://www.physchemaspects.ru Ф50 Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов [Текст]. Тверь: Твер. гос. ун-т, 2019. Вып. 11. 680 с. Зарегистрирован Федеральной службой по надзору в сфере связи, информационных технологий и массовых коммуникаций, свидетельство о регистрации СМИ ПИ № ФС 7747789 от 13.12.2011. Издание составлено из оригинальных статей, кратких сообщений и обзоров теоретического и экспериментального характера, отражающих результаты исследований в области изучения физико-химических процессов с участием кластеров, наноструктур и наноматериалов физики, включая межфазные явления и нанотермодинамику. Сборник предназначен для научных и инженерно-технических работников, преподавателей ВУЗов, студентов и аспирантов. Издание подготовлено на кафедре общей физики Тверского государственного университета. Переводное название: Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials Транслитерация названия: Fiziko-himičeskie aspekty izučeniâ klasterov, nanostruktur i nanomaterialov
It was of interest to search for luminescent reactions to terbium in complexes with sulfosalicylic acid derivatives and to strengthen them by studying the influence of the third components (aminopolycarboxylic acids, organic bases, and surfactants). Absorption spectra of solutions of rare earth element complexes in the wavelength range of 220-880 nm were recorded using the SF-26 spectrophotometer. To obtain the maximum luminescence of the luminescent reaction of rare earth elements in complexes with organic reagents, a number of factors that have a significant impact on the intensity of solutions of luminescent complexes have been studied. Such factors are the pH of the complexes, concentration of reagent, time of maturation complexes, the irradiation time, the order of adding the reagents and the ionic strength of the solutions. According to studies conducted, surfactants increase the luminosity of terbium ions in complexes with sulfosalicylic acid derivatives. As a surfactant, decylpyridinium chloride was used in solutions. The existence of a bright luminescent green reaction of terbium in a complex with methyl ester S- (4-bromanilide) sulfosalicylic acid was established. The optimal conditions for the complexation of terbium were selected and highly sensitive luminescent methods for determining terbium in various objects were developed. Terbium is converted into a luminescent complex compound with an organic reagent S- (4-bromanililide) sulfosalicylic acid methyl ester in the presence of a cationic surfactant decylpyridinium chloride in a ratio of 1: 2: 13, pH 7.9 ± 0.08. The resulting complex compound of terbium upon irradiation with a mercury lamp under ultraviolet light gives intense green luminescence that is stable during standing and irradiation. As a consequence, the proposed method allows to determine terbium in the oxides of rare earth elements, which are quenchers of luminescence with a sensitivity of 10-8%, bypassing the extraction stage. The sensitivity of the determination of terbium in the oxides of the remaining lanthanides is 2.4·10-10%.
Представляло интерес провести поиски люминесцентных реакций на тербий в комплексах с производными сульфосалициловой кислоты и по их усилению путем исследования влияния третьих компонентов (аминополикарбоновые кислоты, органические основания и поверхностно-активные вещества). Как показали результаты проведенных исследований, поверхностно-активные вещества увеличивают интенсивность свечения ионов тербия в комплексах с производными сульфосалициловой кислоты. Установлено существование яркой люминесцентной реакции зеленого цвета тербия в комплексе с метиловым эфиром S-4-броманилидом) сульфосалициловой кислоты. Подобраны оптимальные условия комплексообразования тербия и разработаны высокочувствительные люминесцентные методы определения тербия в различных объектах. Тербий переводят в люминесцирующее комплексное соединение с органическим реагентом - метиловым эфиром S-4-броманилидом) сульфосалициловой кислоты в присутствии катионного поверхностно-активного вещества хлорида децилпиридиния в соотношении 1: 2: 13, рН= 7,9 ± 0,08. Получаемое комплексное соединение тербия при облучении ультрафиолетовым светом ртутной лампы дает интенсивную люминесценцию зеленого цвета, устойчивую во времени стояния и облучения. Предложенный способ позволяет определить тербий в оксидах редкоземельных элементов, являющихся тушителями люминесценции с чувствительностью 10 - 10%, минуя стадию экстракции. It was of interest to search for luminescent reactions to terbium in complexes with sulfosalicylic acid derivatives and to enhance them by studying the effect of third components (aminopolycarboxylic acids, organic bases and surfactants). As the results of the conducted studies have shown, surfactants increase the intensity of the glow of terbium ions in complexes with sulfosalicylic acid derivatives. The existence of a bright luminescent reaction of green terbium in complex with the methyl ester of S-(4-bromanilide) sulfosalicylic acid has been established. Optimal conditions for the complexation of terbium have been selected and highly sensitive luminescent methods for the determination of terbium in various objects have been developed. Terbium is converted into a luminescent complex compound with an organic reagent - methyl ether S-(4-bromanilide) sulfosalicylic acid in the presence of a cationic surfactant decylpyridinium chloride in a ratio of 1: 2: 13, pH = 7,9 ± 0,08. The resulting complex compound of terbium, when irradiated with ultraviolet light from a mercury lamp, gives intense green luminescence, stable during standing and irradiation. The proposed method makes it possible to determine terbium in oxides of rare earth elements, which are luminescence quenchers with a sensitivity of 10 - 10%, bypassing the extraction stage.
The reaction of spontaneous polymerization in the N, N-dialkylaminoethyl methacrylate - alkyl halide system in organic solvent solutions is considered. It is shown that polymerization in the system under study begins only after the formation of quaternary ammonium salt in the reaction medium (at a concentration of about 0.2 mol/L) by the Menshutkin reaction, as a result of quaternization of the unsaturated amine with an alkyl halide. For the explanation of the aggregate of the obtained experimental data, fundamental considerations were formulated, kinetic schemes were developed, and the corresponding mechanism of polymerization processes was proposed.
The reaction of spontaneous polymerization in the system of N, N-diethylaminoethyl methacrylate with allyl chloride and bromide, orthophosphoric acid in ethanol and dimethyl sulfoxide solutions is considered. Spontaneous polymerization proceeds, consisting of two stages: the quaternization reaction and the polymerization reaction. It was shown that the accompanying reaction of quaternization, spontaneous polymerization, takes place both in a mixture of reagents and in the presence of a solvent, in other words, and by mixing an unsaturated amine and an alkyl halide.
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