Azocalix[4]arene strapped calix[4]pyrrole: a confirmable fluoride sensor.

Preecha Thiampanya, Nongnuj Muangsin, Buncha Pulpoka

Supramolecular Chemistry Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Bangkok 10330, Thailand.

Organic letters 2012 Aug 17

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A new chromogenic fluoride sensor based on 1,3-di-p-nitrophenylazocalix[4]arene-calix[4]pyrrole (1) was designed and synthesized. The color of the solution of probe 1 changed upon the addition of any F(-), CH(3)CO(2)(-), PhCO(2)(-), and H(2)PO(4)(-) ions. However, from these ions the highly specific sensing of F(-) is achieved by the addition of Ca(2+) which leads to a color change from light sky blue (of 1·F(-)) back to the original light orange color of 1.

Citation

Preecha Thiampanya, Nongnuj Muangsin, Buncha Pulpoka. Azocalix[4]arene strapped calix[4]pyrrole: a confirmable fluoride sensor. Organic letters. 2012 Aug 17;14(16):4050-3