Abstract
In this study, a simple one-photon and two-photon probe, 7-(4′-(diethylamino)-2′-hydroxybenzylideneimino)-4-methyl coumarin, for Zn2+ is designed and synthesized. The sensor shows high selectivity towards Zn2+ ions with significant fluorescence intensity enhanced at 500nm, which might be attributed to the formation of 2:1 stoichiometric L–Zn complex resulting in the restricted CN isomerization and the inhibited photo-induced electron transfer. More importantly, the reversibility of the recognition process of HL is performed by adding a Zn2+ bonding agent Na2EDTA.
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