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A highly turn-on fluorescent CHEF-type chemosensor for selective detection of Cu2+ in aqueous media
Siham Slassi1, Mohammed Aarjane1, Abdelkrim El-Ghayoury2
1LCBAE, Equipe Chimie Moléculaire et Molécules Bioactives, Faculté des Sciences Université Moulay Ismail, BP 11201 Zitoune, Meknes, Morocco.
Abstract:
An efficient "turn on" fluorescence chemosensor Schiff base LH based on the combination of 2-Hydroxy-5-(p-tolyldiazenyl)benzaldehyde and N-(3-Aminopropyl)imidazole was prepared and characterized then evaluated for its selective fluorescent sensing of Cu2+ amongst other metal ions. The CN isomerization inhibition process induced by the Cu2+ binding warrants the chelation-induced enhanced fluorescence (CHEF) effect. In addition, the detection limit sensing of LH for Cu2+ was found to be 1.8 × 10-6 M that is below the WHO recommendation level (20 μM) for drinking water.
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