par Druzhinin, Sergey S.I.;Rusalov, Michael M.V.;Uzhinov, Boris B.M.;Gromov, Sergey S.P.;Sergueev, Serguei 
;Alfimov, Michael M.V.
Référence Journal of fluorescence, 9, 1, page (33-36)
Publication Publié, 1999
;Alfimov, Michael M.V.Référence Journal of fluorescence, 9, 1, page (33-36)
Publication Publié, 1999
Article révisé par les pairs
| Résumé : | The absorption and fluorescence spectra of complexes of butadienyl dye (1) with lithium, sodium, magnesium, and calcium cations in MeCN were investigated. The addition of Li, Na, Mg, and Ca perchlorates to the solution of dye 1 in acetonitrile results in a significant (up to 5900-cm-1) shortwavelength shift of the absorption spectrum and a small (about 200-cm-1) short-wavelength shift of the fluorescence spectrum. The recoordination reaction in metal complexes of 1 takes place by intramolecular mechanism. The fluorescence quantum yield of ILi+, INa+, and Ca2+ is approximately two times higher than that for 1. It was supposed that Li+ cation coordinates predominantly with oxygen atoms of macrocycle and, hence, influences weakly macrocycle nitrogen atoms conjugated with a molecule π-system. © 1999 Plenum Publishing Corporation. |
