Author(s)

Ping-Feng Hsu, Yun Chen^*

Department of Chemical Engineering, National Cheng Kung University, Tainan.

An efficient pyrene-Schiff base fluorescent sensor PySb was synthesized and evaluated for its fluorescence response to metal ions. Sensor PySb exhibits an “off-on-type” mode with high selectivity to Zn²⁺ and Al³⁺ in ethanol (470 nm) and in dimethyl sulfoxide (458 nm) respectively. The originally non-fluorescent PySb, due to photo-induced electron transfer (PET) from imine moiety, is turned on after binding with the cations. The stoichiometric ratio between PySb and Zn²⁺ is 1:2; moreover, the limit of detection (LOD) and bonding constant were 2.39 × 10^-8 M and 2 × 10⁹ M^-1 respectively, as obtained from titration experiments.

Fluorescent Sensor, Pyrene, Schiff Base, Photo-Induced Electron Transfer (PET), Limit of Detection (LOD)

Hsu, P. and Chen, Y. (2018) Synthesis of a Pyrene-Derived Schiff Base and Its Selective Fluorescent Enhancement by Zinc and Aluminum Ions. International Journal of Organic Chemistry, 8, 207-228. doi: 10.4236/ijoc.2018.82016.