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Information × Registration Number 0222U000112, 0119U002035 , R & D reports Title Bis(crown ethers) with photosensitive or rigid linkers capable to pre-organization: synthesis, structure and study of complexation with metal cations and organic substrates to search a new chemosensors popup.stage_title Head Kirichenko Tatiana I., Доктор хімічних наук Registration Date 03-01-2022 Organization Physico-Chemical Institute O. Bogatsky National Academy of Sciences of Ukraine popup.description2  The object of research – Synthesis, structure and complexing properties of molecular clips, with fragments of diphenylglycoluryl and benzoaza- and benzonaphthalene crown ethers. The aim of this work – synthesis of molecular clips with fragments of diphenylglycoluryl and benzoaza and benzonaphthalene crown ethers, study of their structure and complexation with of alkali and alkaline earth cations. The interaction of diphenylglycoluril bis-ether with benzoaza-15-crown-5 derivatives in polyphosphate acid was studied and bis(benzoazacrown ethers) with diphenylglycoluryl fragments were obtained for the first time. The use of benzoaza-15-crown-5 with an unsubstituted Nitrogen atom gives a low yield of the target product. The introduction of substituents on the nitrogen atom can increase the yield to 40-42%. Spectrophotometric titration showed that bis (benzoazacrown ether) with a methyl group on a nitrogen atom with alkali and alkaline earth metal cations form only 1: 1 complexes. As well as for molecular clips with fragments of benzo-15-crown-5 and diphenylglycoluryl, in a number of alkali metal ions the stability constants of the complexes consistently increase during the transition from sodium ion to potassium and rubidium ions. The smallest constants were obtained for the cesium ion. However, the calculated values of the constants are much lower (up to 3 orders of magnitude of logarithmic units for potassium and rubidium). The conclusion is made about the formation of intramolecular sandwich complexes in the case of bis (benzoase-15-crown-5) with methyl groups with potassium and rubidium cations. The interaction of tetrabromobenzonaphthalene-18-crown-6 with diphenylglycoluryl derivatives was studied and it was found that the reaction does not lead to the formation of a molecular clip with terminal naphthalene fragments. Product Description popup.authors Bogashchenko Tetyana Yu. Kirichenko Tetiana I. Kulygina Katerina Yu. Chepelev Olexander V Jackovenko Irina S. popup.nrat_date 2022-03-09 Close