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Information × Registration Number 0218U001461, 0115U000484 , R & D reports Title New chemosensory systems and nanomaterials on basis of silica-organic hybrids with the immobilized fluorophors and electro-active substances popup.stage_title Head Kholin U, Registration Date 19-04-2018 Organization Kharkov National University named after V.N. Karazin popup.description2 Objects of investigation: materials based on organic-silica hybrid materials with immobilized organic chromo- and fluoroionophores and electroactive compounds. Subject of investigation: protolytic equilibria and processes of complexation on the surface, characteristic of near-surface layer of the materials by the ionic probing results and molecular fluorescent and solvatochromic probes; development of new sorbents for toxicants' extraction. Electrochemical behavior of ionic liquids based on imidazole that anchored on the surface. Objectives: synthesis of new organic-silica hybrid nanomaterials with anchored fluorescent and electroactive compounds, investigation of physical-chemical properties. Methods: sol-gel synthesis, quantitative physical-chemical analysis, potentiometry, surface probing, spectrofluorometry, diffuse reflection spectroscopy, scanning and penetrating electron microscopy, solid NMR (13С, 29Si) spectroscopy. Results and novelty: the morphology and structure of synthesized organic-silica hybrid materials with anchored 1-n-propyl-3-methylimidazolium chloride and their grafted layer are characterized. By the results of fluorescent and solvatochromic indicators probing expressed acidity and high polarity in near-surface layer of materials under study are revealed. The possibility of obtained materials to be used as voltamperometric and amperometric sensors is proved. Spectral characteristics of several series of organic fluorescent compounds that potentially capable for probing of organic-silica materials surface with the purpose of surface physical-chemical properties are obtained and investigated. Optimal parameters of fluoroionochromic dyes immobilization on the surface of modified silica, chemical and photochemical stability of obtained materials are investigated. Modified polydentative silica are synthesized and their sorption properties are examined. Product Description popup.authors Ільяшенко Р. Григорович О. Дорошенко А. Захаров А. Мішуров Д. Пантелеймонов А. Правда А. Решетняк О. Рошаль О. Сухова Т. Ткаченко О. Холін Ю Чепелєва Л. popup.nrat_date 2020-04-02 Close