A highly selective fluorescent sensor for Cu2+ based on 2-(2 '-hydroxyphenyl)benzoxazole in a poly(vinyl chloride) matrix

作者：Zhang, Xiao Bing; Peng, Jing; He, Chun Lian; Shen, Guo Li; Yu, Ru Qin^*

来源：Analytica Chimica Acta, 2006, 567(2): 189-195.

DOI：10.1016/j.aca.2006.03.025

• intramolecular proton transfer
• fluorescent chemical sensor
• Cu(II) ion
• benzoxazole derivative

This paper describes a copper selective optical chemical sensor based on static quenching of the fluorescence of 2-(2'-hydroxyphenyl)benzoxazole entrapped in a poly(vinyl chloride) (PVC) membrane. The effect of the composition of the sensing membrane was studied, and experimental conditions were optimized. The sensors exhibit stable response over the concentration range from 4.0 x 10(-8) M to 5.0 x 10(-5) M Cu2+ at pH 4.0-6.5, and a high selectivity. The response time for Cu2+ with concentration < 5 x 10(-6) M is less than 7 min. The optode can be regenerated using 0.1 M HCl and acetate buffer solution. The sensor has been used for direct measurement of copper content in river water samples with a relative error less than 4% with reference to that obtained by atomic absorption spectrometry.

• 出版日期2006-5-17
• 单位湖南师范大学; 湖南大学