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

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

Thiacalix[4]arene’s lower rim derivatives: Synthesis and supramolecular properties

© ISUCT Publishing. A consolidated review on the synthesis of lower rim tetrasubstituted thiacalixarenes and their self-assembly on the soft surfaces contributed from our group is presented. The approaches for the synthesis of different types of tetra-O-substituted thiacalixarenes from the last 10 years are discussed. In addition, amphiphilic macrocycles in 1,3-alternate conformation form monolayers at the interface and are effectively embedded into the vesicles. Decorated by thiacalixarenes nanolayers and vesicles demonstrate a high selectivity towards specific analytes

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

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

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

Cyclic voltammetry of tris(2,2-bipyridine)zinc(II) diperchlorate detected by electron spin resonance

Electrochemical transformations of the tris(2,2-bipyridine) complex of zinc(II) perchlor- ate were studied by cyclic voltammetry detected by electron spin resonance (DESR CV), which made it possible to indentify the intermediates formed and to monitor the unpaired electron localization in them. © 2013 Springer Science+Business Media, Inc

Synthesis of new p-tert-butylcalix[4]arene derivatives containing photopolymerizable 1,3-butadiyne fragments

© 2017, Pleiades Publishing, Ltd. Successive functionalization of p-tert-butylcalix[4]arene afforded a bifunctional derivative containing photopolymerizable pentacosa-10,12-diynoic acid fragments on the upper rim and propargyl groups on the lower rim of the macrocycle having a cone structure. The functionalization can be readily accomplished via copper-catalyzed azide–alkyne cycloaddition under mild conditions

Interactions of New bis-Ammonium Thiacalix[4]arene Derivatives in 1,3-Alternate Stereoisomeric Form with Bovine Serum Albumin

© 2016, Springer Science+Business Media New York.New bis-ammonium thiacalix[4]arene derivatives with different lipophilicity were synthesized using copper(I)-catalyzed azide-alkyne cycloaddition in good yields. Binding of a new thiacalix[4]arene derivatives with bovine serum albumin (BSA) was investigated in detail using fluorescence spectroscopy method. Quenching mechanism, the binding constants, and number of binding sites were determined

'Click chemistry' in the synthesis of new amphiphilic 1,3-alternate thiacalixarenes

© 2015 Mendeleev Communications. Azidoalkyl-substituted 1,3-alternate p-tert-butylthiacalix[4]arenes were subjected to click reactions with alkynes affording thus novel amphiphilic derivatives of this series

Photochromism of 3H-2,1,4-benzoxadiazine 4-oxides with heterocyclic substituents on the benzene ring

© 2017, Pleiades Publishing, Ltd.2H-Benzimidazole 1,3-dioxides undergo thermal isomerization to 3H-2,1,4-benzoxadiazine 4-oxides which are converted to 2H-benzimidazole 1-oxides on further heating. Irradiation of 3H-2,1,4-benzoxadiazine 4-oxides with sunlight induces their transformation to 2H-benzimidazole 1,3-dioxides. 3H-2,1,4-Benzoxadiazine 4-oxides containing nucleophilic heterocyclic substituents are considerably more stable to sunlight, and they can be used as photochromic compounds