New Azobenzene Dye Colorimetric and Ratiometric Chemosensors for Mercury(II) Ion

✍ Scribed by Min Guo; Wei Xue; Mingyun Guan; Jianhua Sun; Gui Yin

• Book ID: 102101633
• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 80 KB
• Volume: 27
• Category: Article
• ISSN: 0256-7660
• DOI: 10.1002/cjoc.200990298

✦ Synopsis

Abstract

A new series of azobenzene dyes, which possessed colorimetric and ratiometric recognition to Hg^2+^ based on the mechanism of internal charge transfer (ICT), was developed and characterized. The molecules involving azo and imino functional groups can coordinate with Hg^2+^ to result in a large blue shift from 453 to 363 nm corresponding to a notable color change from orange to pale yellow in aqueous methanol solution (H~2~O/CH~3~OH=1/4, V/V), which can be applied to naked eye detection of Hg^2+^. The sensitivity, selectivity and binding mode of the sensors to Hg^2+^ were investigated by UV‐Vis spectroscopy.