標題: | Highly Selective Fluorescent Sensors for Hg(2+) and Ag(+) Based on Bis-triazole-Coupled Polyoxyethylenes in MeOH Solution |
作者: | Hung, Hao-Chih Cheng, Chi-Wen Wang, Yu-Yun Chen, Yu-Jen Chung, Wen-Sheng 應用化學系 Department of Applied Chemistry |
公開日期: | 1-十二月-2009 |
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 polyoxyethylenes were used as metal-ion binding sites and the pyrenes as fluorophores. Of the 15 metal ions screened, the fluorescence of chemosensors 6-9 in methanol solution was found to be selectively quenched by only Hg(2+) and Ag(+). In contrast, the fluorescence of control compound 10, a [(triazol-4-yl)methoxymethyl]pyrene, was quenched by only Hg(2+). These results imply that the recognition of Hg(2+) does not need the cooperation of two triazole groups. Binding constants for the interactions of 6-9 with Ag(+) increased as the chain length of the polyoxyethylene increased. Finally, a very high selectivity of compound 9 towards Hg(2+) in aqueous methanol solution was observed. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009) |
URI: | http://dx.doi.org/10.1002/ejoc.200900987 http://hdl.handle.net/11536/6373 |
ISSN: | 1434-193X |
DOI: | 10.1002/ejoc.200900987 |
期刊: | EUROPEAN JOURNAL OF ORGANIC CHEMISTRY |
Volume: | |
Issue: | 36 |
起始頁: | 6360 |
結束頁: | 6366 |
顯示於類別: | 期刊論文 |