Xianjiao Meng, Shengling Li, Wenbing Ma
Jul 1, 2018
Citations
0
Influential Citations
43
Citations
Journal
Dyes and Pigments
Abstract
Abstract In this study, a highly selective fluorescence chemosensor N-(2-(bis(2-((4-methylphenyl)sulfonamido)ethyl)amino)ethyl)-7-(diethylamino)-2-oxo-2H-chromene-3-carboxamide(1) was synthesized and characterized by 1H NMR, 13C NMR and ESI-MS. This tren-based chemosensor 1 showed an “on-off-on” fluorescence response toward Cu2+ and H2PO4− with a 1:1 binding stoichiometry in CH3CN/HEPES buffer medium (9:1 v/v) by UV/vis and fluorescence spectroscopies. The detection limits of sensor 1 to Cu2+ was determined to be 0.37 μM, while that of 1-Cu2+ complex to H2PO4− was 1.6 μM, respectively. The sequential recognition behavior can be repeated four times with little fluorescence efficiency loss using Cu2+ and H2PO4−. The stable pH range for Cu2+ and H2PO4− determination was from 4 to 7.5.