Journal of Industrial and Engineering Chemistry, Vol.5, No.3, 212-217, September, 1999
Immobilization of Polyamine Ligands onto a Fluroophore Framework: Their Syntheses and Fluorescent Studies
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Geometric immobilization of polyamine ligands is expected to change their binding properties toward metal ions. 1,8-Bis(1,4,7-triazacyclononylmethyl) anthracene (10) and 1,8-bis(1,5,9-triaza-cyclododecanylmethyl)anthracene (11) were synthesized from 1,8-bis(bromomethyl)anthracene (7) using appropriate azacrown type compounds. Purification of these compounds based on selective pH extraction methods is described. Chelation-enhanced fluorescence (CHEF) effect was observed when 10 complexed nonquenching metal ions such as Zn(Ⅱ) and Cd(Ⅱ). When compound 10 was titrated with Cu(Ⅱ), wecould obserbe chelation-enhanced quenching(CHEQ) effect in 100% aqueous solution. On the other hand, compound 11 showed no effect on fluorescence by any metal ion examined.
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