Solvent dependant isatin-based Schiff base sensor as fluorescent switch for detection of Cu 2+ and S 2− in human blood serum
作者:Mohammad Shakir、Ambreen Abbasi
DOI:10.1016/j.ica.2017.04.057
日期:2017.8
A isatin based Schiff base sensor, L was synthesized by simple one step condensation method and was characterized by various physico-chemical techniques. Sensor L, exhibited fluorescence turn off response to Cu2+ in DMSO: methanol solvent mixture which was further used to detect S2- with fluorescence turn-on response. On changing solvent mixture from DMSO: methanol to DMSO: water reversal of fluorescence behaviour was observed for Cu2+ and S2-. Also, the in-situ formed L-Cu2+ ensemble showed colorimetric response to S2- at high concentration of sulphide ions in both solvent mixtures. Sensor, L was successfully applied to recognize Cu2+ and S2- in human blood serum with micromolar detection limits. (C) 2017 Published by Elsevier B.V.