Articles written in Journal of Chemical Sciences
Volume 128 Issue 8 August 2016 pp 1337-1343 Regular Article
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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