Highly Selective Fluorescent Sensors for Hg2+ and Ag+ Based on Bis-triazole-Coupled Polyoxyethylenes in MeOH Solution

作者: Hao-Chih Hung , Chi-Wen Cheng , Yu-Yun Wang , Yu-Jen Chen , Wen-Sheng Chung

DOI: 10.1002/EJOC.200900987

关键词: Inclusion compoundOrganic chemistryTriazoleFluorophoreAqueous solutionFluorescenceSelectivityMetal ions in aqueous solutionChemistryEtherPolymer chemistry

摘要: Fluorescent chemosensors 6–9, with variable length polyoxyethylenes between two triazolylmethyl ether units, have been synthesized under “click” conditions in which the bis-triazoles and were used as metal-ion binding sites pyrenes fluorophores. Of 15 metal ions screened, fluorescence of 6–9 methanol solution was found to be selectively quenched by only Hg2+ Ag+. In contrast, control compound 10, a [(triazol-4-yl)methoxymethyl]pyrene, Hg2+. These results imply that recognition does not need cooperation triazole groups. Binding constants for interactions Ag+ increased chain polyoxyethylene increased. Finally, very high selectivity 9 towards aqueous observed.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)

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