Li-mei Liu, Zheng-yin Yang
2018
Citations
0
Influential Citations
48
Citations
Journal
Inorganica Chimica Acta
Abstract
Abstract A new Al 3+ sensor, 6-ethoxychromone-3-carbaldehyde-(3-hydroxy-2-naphthalene acyl) hydrazone (L), was designed and synthesized. The sensor L could exist steadily and detect Al 3+ in the pH range from 5.0 to 8.0 in ethanol and water (3:1, v/v). This sensor showed good selectivity and high sensitivity towards Al 3+ in the presence of most metal ions, and a remarkable enhancement in fluorescence emission intensity at 508 nm (λ ex = 420 nm) was observed with addition of 1equiv Al 3+ , which was attributed to the inhibition of photoinduced electron-transfer (PET) phenomenon and C N isomerization process. With the fluorescence titration experiments and the ESI-MS spectrum data, we reached the conclusion that the binding ratio between L and Al 3+ was 2:1. Besides, the binding constant (K a ) between L and Al 3+ was calculated to be 9.24 × 10 3 M −1 and the detection limit of L for Al 3+ was as low as 1.82 × 10 −7 M.