摘要:
A new Schiff-base ligand (1) with good fluorescence response to Al3+, derived from 2-oxo-quinoline-3-carbaldehyde and nicotinic hydrazide, had been synthesized and investigated in this paper. Spectroscopic investigation revealed that the compound I exhibited a high selectivity and sensitivity toward Al(III) ions over other commonly coexisting metal ions in ethanol, and the detection limit of Al3+ ions is at the parts per billion level. The mass spectra and Job's plot confirmed the 1:1 stoichiometry between 1 and Al3+. Potential utilization of 1 as intracellular sensors of Al3+ ions in human cancer (HeLa) cells was also examined by confocal fluorescence microscopy. (C) 2013 Elsevier B.V. All rights reserved.