A fluorescent chemosensor (1) based on 2‐hydroxy‐1‐naphthaldehyde Schiff‐base was developed for the detection of Al3+ in 100% aqueous solution. Upon addition of Al3+, a significant fluorescence enhancement was observed, which was not affected by other metal ions including Na+, K+, Ca2+, Mg2+, Mn2+, Co2+, Ni2+, Cu2+, Cr3+, Ag+, Pb2+, Zn2+, Cd2+, Hg2+, Fe2+ and Fe3+ under weak acid conditions. Moreover, the specific response to Al3+ was visible under natural light. The binding mode between 1 and Al3+ was clarified by ESI‐MS and 1H NMR.
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Li et al. (2014) studied this question.
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