Fluoride-induced intermolecular excimer formation of bispyrenyl thioureas linked by polyethylene glycol chains
作者:Duangrat Thongkum、Thawatchai Tuntulani
DOI:10.1016/j.tet.2011.08.060
日期:2011.10
induced the pyrene excimerformation. Job’s plots showed 1/1 or 2/2 complexation of L1 with F−. Ratios of IE/IM of L1·F− complex were dependent on the concentration of L1, implying that the dimerization of L1 proceeded via the intermolecular excimerformation. Among L1–L4, L1 possessed the highest binding constant and sensitivity toward F− implying the importance of the linking PEG chain. L1 was demonstrated
New Highly Selective Colorimetric and Fluorescent Chemodosimeters for Mercury Ion
作者:Chen-Yu Wu、Chiung-Cheng Lin、Tung-Ming Fu、Chi-Rei Yang、Yao-Pin Yen
DOI:10.1071/ch09431
日期:——
Three new chemodosimeters 1–3 were prepared, and their chromogenic and fluorogenic behaviours toward various metal cations were investigated. Receptors 1–3 show an exclusive response toward Hg2+ and also distinguish Hg2+ from other metal cations by different colour changes in aqueous DMSO solution. Among them, receptor 1 also exhibits a pronounced Hg2+-induced fluorescence enhancement. Therefore, the