Title | New polymetine dyes from furo [3,2-f]-, furo [2,3-h] flavilium and 4-methyl furo [4′, 3′] flavilium salts |
Publication Type | Journal Article |
Year of Publication | 2018 |
Authors | Tolmachev, AI, Kudinova, MA, Kurdyukov, VV |
Abbreviated Key Title | Dopov. Nac. akad. nauk Ukr. |
DOI | 10.15407/dopovidi2018.06.098 |
Issue | 6 |
Section | Chemistry |
Pagination | 98-104 |
Date Published | 6/2018 |
Language | Ukrainian |
Abstract | Symmetric and non-symmetric polymethine dyes based on 2,9-dimethyl-1,2-dihydrofuro[3,2-f]-, 4,8- dimethyl -8,9 dihydrofuro [2,3-h]- and 4-methylfuro[4′,3′]flavilium salts are synthesized. It is shown that the influence of the new heterocyclic residues — isomeric dihydrofuroflavilium systems — on the absorption spectra of synthesized dyes is expressed in the bathochromic shift of the long-wavelength absorption band and an increase of the absorption intensity in comparison with the corresponding 6-, 7- and 4'-methoxy substituted and unsub. |
Keywords | absorption spectra, furo[3;2-f]- and furo[2;3-h] flavilium salts, polymethine dyes |
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