THIACALIX[4]ARENES DERIVATIVES: FROM SELF-ASSEMBY TO FUNCTIONAL MATERIALS

This work was supported by the by Russian Science Foundation, project # 19-13-00095

Application of the fourfold tables method for analysis of dynamics of social systems

The problem of comparison of statistics expressed in quantitative scale, when the use of all possibilities of statistical analysis is methodologically limited is discussed. The model of analysis of the dynamics in short time series, including that with barely discernible levels, using standardized fourfold table in terms of linguistic variable is considered. Such approach allows building the mapping of statistical point indexes from quantitative scale to order (rank) scale, and forming groups according the studied parameter with a given discrepancy level - weak, significant, strong and absolute

Response of Tb(III) and Eu(III) centered luminescence on phase transitions in aqueous solutions of triblock copolymers

The work introduces the temperature induced quenching of Tb(III) and Eu(III) centered luminescence sensitized by ligands 2,2':6',2″-terpyridine and difloxacin in aqueous solutions of triblock copolymers, namely (PEO)13(PPO)30(PEO)13 (L64), (PPO)14(PEO)24(PPO)14 (17R4) and (PPO)8(PEO)22(PPO)8 (10R5). The results reveal the temperature induced shifting of the complex formation equilibriums in solutions of the triblock copolymers as the reason of the quenching of Eu(III) and Tb(III) centered luminescence. The correlation between the temperature induced quenching and the aggregation behavior of the triblock copolymers is revealed. Both the nature of the ligand and the architecture of the triblock copolymer affect the Tb(III) and Eu(III) centered luminescence response to the temperature induced phase transitions. © 2014 Elsevier B.V

Phosphorylated derivatives of salicylaldehyde azomethines

© 2016 Taylor & Francis Group, LLC.New phosphorylated azomethines on the basis of salicylaldehyde were obtained. These compounds react with P(Y) chlorides to form diphosphorylated azomethines

Colloidal stability and photophysical characteristics of luminesent silica nanoparticles modified with various nitrogen/oxygen-containing trialkoxysilanes

© 2016, Pleiades Publishing, Ltd.Surface modification of the luminescent silica nanoparticles doped with Tb(III)–p-sulfonatothiacalix[ 4]arene complex was carried out using a series of nitrogen/oxygen-containing trialkoxysilanes. It was found that groups capable of nonspecific interactions on the surface of the nanoparticles cause a significant decrease in their colloidal stability. The chromophore moieties in the modifiers were found to quench the luminescence of the nanoparticles. The surface modification of the nanoparticles is responsible for the change in the mechanism of luminescence quenching in the presence of copper(II) ions due to decreased accessibility of luminophores to the quencher

Reactions of Pyridoxal with Heterocycles Containing Primary Amino Group

© 2018, Pleiades Publishing, Ltd. New nitrogen-containing derivatives of pyridoxal were obtained as a result of its reaction with various amines. The reactions with amines bearing a heterocyclic fragment (pyridine, pyrimidine, quinoline, piperidine) furnished the final products stabilized in an aminoacetal form. The product prepared from 2-aminomethylpiperidine has an imidazolidine fragment in the molecule

Calixarene-based supramolecular systems: a platform for nanomaterials design by self-assembly

Lower rim thiacalix[4]arenes derivatives in cone and 1,3-alternate conformations have many advantages to create a wide range of precursors for the design of very sophisticated supramolecular architectures. These compounds can be considered as technological platform for nanomaterials design by self-assembly method. Particular attention will be paid to the application of calixarene derivatives for the construction of various supramolecular and nanosystems, devices and smart materials: colloid nanoparticles, catalytic systems, metalcoordinated networks, Langmuir-Blodgett nanolayers, molecular magnets etc.The authors gratefully acknowledge of the RSF (19-13-00095 and 18-73-10033) for the financial support

1-(3,3-Diethoxypropyl)-1-[(dihexylphosphoryl)methyl]-3-phenylurea in the Synthesis of 4-Aryl-Substituted Tetrahydropyrimidin-2-ones

© 2018, Pleiades Publishing, Ltd. First specimens of 4-aryl-substituted tetrahydropyrimidin-2(1H)-ones containing a phosphoryl group were obtained through the reaction of 1-(3,3-diethoxypropyl)-1-[(dihexylphosphoryl)methyl]-3-phenylurea with resorcinol and its derivatives in the presence of trifluoroacetic acid

Synthesis of 2-arylpyrrolidines by reaction of γ-ureidoacetals with benzene-1,3,5-triol

© 2016, Pleiades Publishing, Ltd.New 2,2′-(2,4,6-trihydroxybenzene-1,3-diyl)dipyrrolidine derivatives have been synthesized by reaction of benzene-1,3,5-triol (phloroglucinol) with γ-ureidoacetals in the presence of trifluoroacetic acid as catalyst