The report introduces hybrid polyelectrolyte-stabilized colloids combining blue and green-emitting building blocks, which are citrate carbon dots (CDs) and [TbL]⁺ chelate complexes with 1,3-diketonate derivatives of calix[4]arene. The joint incorporation of green and blue-emitting blocks into the polysodium polystyrenesulfonate (PSS) aggregates is carried out through the solvent-exchange synthetic technique. The coordinative binding between Tb³⁺ centers and CD surface groups in initial DMF solutions both facilitates joint incorporation of [TbL]⁺ complexes and the CDs into the PSS-based nanobeads and affects fluorescence properties of [TbL]⁺ complexes and CDs, as well as their ability for temperature sensing. The variation of the synthetic conditions is represented herein as a tool for tuning the fluorescent response of the blue and green-emitting blocks upon heating and cooling. The revealed regularities enable developing either dual-band luminescent colloids for monitoring temperature changes within 25–50 °C through double color emission or transforming the colloids into ratiometric temperature sensors via simple concentration variation of [TbL]⁺ and CDs in the initial DMF solution. Novel hybrid carbon dots-terbium chelate PSS-based nanoplatform opens an avenue for a new generation of sensitive and customizable single excited dual-band nanothermometers.

A series of cone calix[4]arenes modified with 2-azidoethyl groups at one, two (distal or proximal), and four positions of their narrow rims was prepared. These compounds were studied as the azide components of copper(I)-catalyzed azide–alkyne cycloaddition (CuAAC) with arylacetylenes and aryl propargyl ethers. The study showed that relatively mild or much stronger conditions need to be applied for the complete conversion of the azides into the triazoles, and this depended on the number and mutual arrangement of 2-azidoethyl groups at the narrow rims of calix[4]arenes as well as on the alkyne type selected. Under the optimized conditions a series of calixarenes bearing 2-(4-R-1-triazolyl)ethyl or 2-(4-ROCH₂-1-triazolyl)ethyl (R = phenyl, 2-naphthyl) groups at the narrow rims was prepared, and some bis- and tetrakis(triazoles) from the series were studied for their complexation with transition metal cations. The same complexation study was performed for the related calixarenes bearing (1-R-4-triazolyl)methyl (R = 2-naphthylmethyl) substituents. The triazolated calixarenes of both types were efficient at binding the cations, but the complexation preferences and the cation-binding modes were found to depend drastically on the side by which the triazole units were attached to the calixarene core.

The mechanism of MFI zeolite nanosheet formation was established under accelerated conditions using perchlorate ions and fresh zeolite seeds as promoters. The results indicated that the particles after pretreatment were initially formed as an ordered amorphous assembly that was stepwise converted into zeolite nanosheets. The MFI nanosheet fabrication occurs through the transformation from an MCM-41-like structure to a KIT-1-like structure, lamellar structure, disordered lamellar structure and MFI nanosheets. The application of uniform microwave heating with the addition of promoters made it possible to obtain the assembly of all types of structures in 6 hours. The MFI nanosheet generation process was analyzed by X-ray powder diffraction, IR spectroscopy, N₂ adsorption isotherm measurements, SEM and TEM. A linear function of selectivity for bulky products in the solid acid alkylation process in proportion to the concentration of Brønsted acid sites has been determined for the materials possessing a mesophase.

Equimolar CuAAC (copper(I)-catalyzed azide–alkyne cycloaddition) reactions between phenyl propargyl ether and calix[4]arenes having multiple azidoalkyl groups arranged at their narrow rims were studied. Despite the azide groups being actually present in at least two-fold excess with respect to the alkyne molecules, exhaustive oligo(triazoles) were selectively formed in most cases leaving a significant part of the starting oligo(azides) unreacted. The number and mutual arrangement of the azidoalkyl groups at the calix[4]arene core did not affect the selectivity of the multiple CuAAC reactions. An increase of the length of the spacers between the calixarene core and the azide units from two to four methylene groups decreased the selectivity but still kept the reaction far from the statistically expected outcome. Outstanding results were obtained with the hybrid calixarenes having alternating propargyl and azidoalkyl groups at their narrow rims. Attempts to involve these compounds in CuAAC reactions with low-molecular azides or alkynes failed due to polymer/oligomer formation. Instead, heating these compounds in o-xylene in the absence of any additive led to unique highly constrained calix[4]arenes doubly bridged by 1,5-disubstituted 1,2,3-triazole-containing units, which were formed selectively or even exclusively in the copper-free azide–alkyne Huisgen cycloaddition.