A novel colorimetric HSO4- sensor in aqueous media

作者：Li Ping; Zhang You Ming; Lin Qi; Li Jun Qiang; Wei Tai Bao^*

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2012, 90: 152-157.

DOI：10.1016/j.saa.2012.01.026

• Colorimetric sensors
• Hydrogensulfate recognition
• Aqueous solution
• Colorimetric test kit

A novel and sensitive anion receptor 3, bearing Schiff base structure, nitrophenyl azobenzol and carboxyl groups, was developed and characterized as a single chemosensor for the recognition of HSO4- anion. The different responses of UV-vis spectra and color changes of 3 could be applied to the recognition for HSO4- over other anions such as F-, Cl-, Br-, I-, AcO-, H2PO4- and CIO4- by the naked eye. Furthermore, the anion binding interaction of receptor-anion was also studied using UV-vis and H-1 NMR titration which revealed that 3 displayed a remarkable binding ability for the HSO4- with an association constant K-a = 6.59 x 10(4) M-1. And the detection limitation of HSO4- with the receptor 3 was 2.0 x 10(-6) mol L-1 in aqueous solution. Most importantly, the qualitative detection of HSO4- using receptor 3 was attempted with test kit which was made from receptor 3.

• 出版日期2012-5
• 单位西北师范大学