Novel Turn-on Fluorescence Probes for Al3+ Based on Conjugated Pyrazole Schiff Base

One novel turn-on fluorescence probe founded on conjugated pyrazole Schiff base for detecting Al 3+ was invented. The UV–vis and fluorescence spectrometer were employed to explore optical properties of this probe. The results got from those experiments indicated that this fluorescence probe manifested excellent sensitivity and selectivity for Al 3+ compared with other cations examined(Ag + , Co 2+ , Mg 2+ , Cu 2+ , Ni 2+ , Pb 2+ ,and Zn 2+ ). In addition, this probe displayed a more rapid response and remained stable between pH 6 and 9 by investigating the fluorescence intensity under different response time and various pH values. Remarkably, the detection limit for Al 3+ could lower to 1.0×10 −9 M. Therefore, the probe could be potentially applied to the environment for the detection of Al 3+ , and the availability in biological range of pH that could be further studied to make this probe apply to biological systems in the future.