Object of research: reactive oligomeric silsesquioxanes with an inorganic core in the form of a mixture of polyhedral structures and their open-chain analogues, which contain groups and fragments of different chemical nature and functional purpose in the organic frame (OSS) and organic-inorganic nanostructured polymer composite materials based on them.
Subject of research: methods of obtaining reactive OSS containing chromophoric fragments, ionic groups or amphiphilic fragments in the organic component, as well as ion-crosslinked protic polymeric ionic liquids and network organic-inorganic metal-containing ion-coordination polymers based on OSS, features of structure formation, properties of synthesized compounds.
Research methods: FTIR, 1H NMR, 29Si NMR, UV-Vis, fluorescence spectroscopy, inductively coupled plasma atomic emission spectroscopy, energy-dispersive X-ray spectroscopy, matrix-assisted laser desorption/ionisation-time of flight mass spectrometry, gel permeation chromatography, atomic force microscopy, scanning electron microscopy, X-ray projection microscopy, wide-angle X-ray scattering, differential scanning calorimetry, thermogravimetric analysis, dielectric relaxation spectroscopy, dynamic light scattering, electrophoretic light scattering, magnetometry, disk diffusion method of studying antimicrobial properties.
For the first time, the methods for synthesis of reactive OSS with organic component containing fragments of an azo dye capable of photoisomerization, or fluorescent fragments of a xanthene dye, as well as both types of the chromophores were developed. For the first time, the methods for synthesis of reactive protic cationic linear heterochain oligomeric ionic liquids and organic-inorganic oligomeric ionic liquids based on OSS (OSS-OILs), which contain two types of nitrogen centers with a significant difference in basicity (aliphatic amino groups and imidazole heterocycles), completely or partially neutralized by low molecular weight sulfonic acids, were developed. For the first time, the methods for synthesis of reactive protic cationic OSS-OILs with one type of nitrogen centers (tertiary aliphatic amino groups), neutralized by low molecular weight sulfonic acids, and different amounts of hydroxyalkyl fragments were developed. For the first time, the methods for synthesis of reactive aprotic cationic amphiphilic OSS-OILs which combine alkyl substituents of different lengths and propanediol fragments in the composition of quaternary ammonium cations were developed. For the first time, the methods for obtaining polymeric protic ionic liquids based on the synthesized linear heterochain oligomers or OSS with different types of nitrogen centers and linear oligoethers with terminal sulfonic acid groups were developed. For the first time, the method for synthesis of metal-containing carboxylate ion-coordination polymers based on amphiphilic OSS with different ratios of hydrophilic and hydrophobic fragments was developed. The features of structure formation in the synthesized systems and methods of its regulation, transport, rheological and magnetic characteristics of the obtained hybrid compounds depending on the chemical composition and structure were established. The directions and areas of these systems possible practical use were determined.
