• A fluorescent sensor based on binaphthol-quinoline Schiff base for relay recognition of Zn²⁺ and oxalate in aqueous media

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      https://www.ias.ac.in/article/fulltext/jcsc/128/08/1337-1343

    • Keywords

       

      Zn& #178; & #8314; sensing; oxalate sensing; fluorescence; relay recognition

    • Abstract

       

      To develop an effective fluorescent chemosensor for relay recognition of Zn²⁺ and oxalate, a new fluorescent sensor based on binaphthol quinoline Schiff base L₁ was designed and synthesized. In DMSO-H₂O (1/1, v/v, HEPES 10 mM, pH = 7.4) solution, L₁ exhibits highly selective fluorescence turn on response to Zn²⁺ over other metal ions. The Zn²⁺ recognition event is barely interfered by other coexisting metal ions except Cu²⁺, Co²⁺ and Ni²⁺. The in situ generated L₁-Zn²⁺ complex was further used as a chemosensing ensemble for oxalate detection. The complex L₁-Zn²⁺ displays high selectivity to oxalate with significant fluorescence quenching through Zn²⁺ ion displacement approach. In addition, application of L₁ for imaging of Zn²⁺ and oxalate in living HeLa cells was also examined.

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  • Journal of Chemical Sciences | News

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