A simple 'turn-on' fluorescence chemosensor for Al(iii) detection in aqueous solution and solid matrix.

A simple fluorescence chemosensor of FHS-OH based on salicylaldehyde Schiff base was developed a one-step reaction, which achieved a fast and highly selective response for Al(iii). Mechanism studies showed that when FHS-OH was exposed to Al(iii) with 1 : 2 binding stoichiometry in an aqueous solution at neutral pH, C[double bond, length as m-dash]N isomerization and PET processes were limited, resulting in a 'turn-on' fluorescence response with a low detection limit of 63 nmol L and a satisfying linear range of 0.0-20.