АННОТАЦИЯ
The s-conformations of trans-1b-e were studied by 1H NMR spectroscopy in CD3CN solution. It was shown that in trans-1b-e intramolecular ion pairs between the SO3- group and the positively charged nitrogen atom of the benzothiazolium residue are formed. In the case of trans-1a no ionic association was observed. The complex formation of the trans- and cis-isomers of crown-containing styryl dyes with Mg2+ in CH3CN was studied spectrophotometrically. The anion-"capped" complexes formed by the cis-isomers were found to be more stable than the complexes formed by the corresponding trans-isomers. The stability constants of the complexes formed by the cis-isomers depend markedly on length and type of the N-substituent. Data from PM3 quantum-chemical calculations were used for the interpretation of some experimental data.
ЦИТАТА
Crown-containing styryl dyes: cation-induced self-assembly of multiphotochromic 15-crown-5 ethers into photoswitchable molecular devices / E.N. Ushakov, S.P. Gromov, A.V. Buevich, I.I. Baskin, O.A. Fedorova, A.I. Vedernikov, M.V. Alfimov, B. Eliasson, U. Edlund // Journal of the Chemical Society. Perkin Transactions 2. – 1999. – Т. 999. – № 3. – P. 601-608
