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Citation: YIN Zhifang, ZHONG Tongsheng, LIU Rong. An Optical Chemical Sensor for Cobalt Ion Based on Fluorescence Quenching of 5-Tert-Butyl-2-Methoxy Thiacalix[4] Arene[J]. Chinese Journal of Applied Chemistry, ;2013, 30(4): 464-468. doi: 10.3724/SP.J.1095.2013.20224 shu

An Optical Chemical Sensor for Cobalt Ion Based on Fluorescence Quenching of 5-Tert-Butyl-2-Methoxy Thiacalix[4] Arene

Department of Chemistry & Environmental Engineering, Hunan City University, Yiyang 413000, China

Received Date: 28 May 2012
Revised Date: 11 July 2012

An optical chemical sensor was developed for the determination of CO²⁺ based on the reversible fluorescence quenching of 5-tert-butyl-2-methoxy thiacalix[4] arene(Tc4a-OCH₃) immobilized on a plasticized polyvinyl chloride(PVC) membrane.The optimum membrane of the sensor is composed of 50 mg of PVC,100 mg of dioctyl sebacate(DOS) and 2.5 mg of 5-tert-butyl-2-methoxy thiacalix[4] arene. The maximum response of the membrane for CO²⁺ was obtained in nitric acid solution with pH of 5.6,and the proposed sensor responds linearly in a concentration range of 6.31 × 10^-6~1.26 × 10^-2 mol/L,with a detection limit of 3.11 × 10^-7 mol/L. The sensing membrane has the advantages of high reproducibility,reversibility of the fluorescence signal and good selectivity. Common inorganic ions have no interferences.
- tert-butyl-methoxy thiacalix[4] arene,
- fluorescence quenching,
- optical chemical sensor,
- cobalt ion
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