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Том 8, № 1 (2018)
- Год: 2018
- Статей: 4
- URL: https://ogarev-online.ru/2634-8276/issue/view/13573
Article
Arylmethylidenefuranones: Reactions with C- and N-Nucleophiles
Аннотация
In the review, data on the reactions of arylmethylidene derivatives of 3H-furan-2-ones with C-, N-, N,N-, and N,O-nucleophilic agents and amines of the heterocyclic series are systematized. It is demonstrated that the direction of the reaction depends on the structure of initial reagents, the strength of nucleophilic agent, and the reaction conditions. A wide range of acyclic, cyclic, and heterocyclic compounds are obtained: amides, 4-oxoalkanoic hydrazides, pyrrolones, benzofurans, furopyridines, phenanthrenes, pyrosolinones, pyridazinones, oxazines, thiadiazoles, triazolediazepinones, etc.
183-196
Phosphors Based on Phosphates of NaZr2(PO4)3 and Langbeinite Structural Families
Аннотация
The review covers aspects of modeling the composition and luminescent properties of phosphates of NaZr2(PO4)3 (NZP) and langbeinite structural families. Based on the analysis of phosphates structure, a plausible algorithm of the use of crystal chemistry data for modeling compositions, structure, and properties of new compounds is proposed. The following properties determined by requirements to materials for the chosen purposes are studied: behavior on heating and in water systems, luminescence, and biocompatibility. Prospects for the use of such data for solving various problems of materials science, LED technologies, bioimaging, and X-ray induced photodynamic therapy of oncological diseases are shown.
1-33
Gas Chemical Nanosensors with Sensing Elements Based on Copper and Nickel Oxides
Аннотация
The results of the development of gas chemical nanosensors with sensing elements based on copper and nickel oxides are presented in the review. The developed devices are systematized in accordance with the construction features of their sensing elements. Both types of nanosensors are divided into three groups. The first group includes devices with sensing elements containing a coating of only copper oxide or nickel oxide. The second group combines devices with sensing elements containing a coating of a layer of copper oxide or nickel oxide with an outer layer of another material. The third group are nanosensors with sensing elements containing a coating in the form of a layer of a composite material based on copper oxide or nickel oxide. The performance characteristics of these groups of devices are considered. Some patterns in their behavior are discussed. In particular, the potential of nanosensors in the identification of a large number of inorganic and organic chemical compounds is demonstrated. The effect of the morphology, thickness, and composition of the coating and temperature of the sensing elements on the sensitivity and selectivity of measurements and the response and recovery times is shown.
34-75
Architecture of Polymers: Topological Structure–Properties Relationship
Аннотация
The structure–properties relationship is used as a basis in the description of experimental methods for the characterization of the topological structure of polymers. The possibilities of evaluating the molecular weights, molecular-weight distribution (MWD), and branching from the data on rheological, relaxation, and other physical properties are examined. From this standpoint, crosslinked polymers and equilibrium physical networks, as well as topologically linked macromolecules (polyrotaxanes and polycatenanes), are analyzed. Methods for the calculating relaxation spectra (RSs) from the experimental data are discussed.
76-182