Ratiometric Determination of Hg<sup>2+</sup> Ions Based on Simple Molecular Motifs of Pyrene and Dioxaoctanediamide
                                
                                    
                                        作者:Jun Soo Kim、Myung Gil Choi、Ki Cheol Song、Kyoung Tai No、Sangdoo Ahn、Suk-Kyu Chang                                    
                                    
                                        DOI:10.1021/ol070143r
                                    
                                    
                                        日期:2007.3.1
                                    
                                    A new podand-type dioxaoctanediamide-based chemosensor having two pyrene moieties was prepared, and its fluoroionophoric behaviors toward transition-metal ions were investigated. Pyrene-appended dioxaoctanediamide 1 showed a selective fluorescence quenching toward Hg2+ ions over other transition-metal ions in an aqueous methanol solution. Unique responses in pyrene monomer and excimer emissions allowed selective ratiometric determination of Hg2+ ions in aqueous environments, and the detection limit was found to be 1.6 x 10(-6) M.