Naked Eye and Selective Detection of Copper(Ⅱ) in Mixed Aqueous Media Using a Cellulose-based Support

• 来源期刊: 高等学校化学研究（英文版）
• 年，卷（期）: 2019,（4）
• 页码范围: 598-603
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s40242-019-8313-4

摘要

A new colorimetric sensor based-azo dye for Cu2+ detection was synthesized and characterized by FTIR and NMR spectroscopies.The results showed that the azo dye had a high selective and sensitive recognition toward Cu2+.The solution containing the sensor changed color from pink to pale yellow with a hypsochromic shift in the presence of Cu2+.The sensor selectivity and sensitivity toward Cu2+ ions were investigated by colorimetry and UV-Vis spectroscopy.For practical applications,a cellulosic textile test strip for high-selectivity detection of Cu2+ ions in aqueous solution was developed using the synthesized azo dye as chromogenic chemosensor molecule,while using a solid cellulose textile as a substrate.As a result,a spectacular color change of the test strip was observed depending on the amotmt of copper ions in contact with the strip,which allows an estimation of Cu2+ concentration by naked eye.