A Squaraine-Based Colorimetric and "Turn on" Fluorescent Sensor for Selective Detection of Hg2+ in an Aqueous Medium

作者：Chen, Cheng; Wang, Ruyong; Guo, Liangqia; Fu, Nanyan; Dong, Haijun; Yuan, Yaofeng^*

来源：Organic Letters, 2011, 13(5): 1162-1165.

DOI：10.1021/ol200024g

• LANGMUIR-BLODGETT-FILMS
• AGGREGATION
• DYES
• ION
• PHOTOPHYSICS
• FOLDAMER
• REPORTER
• BEHAVIOR
• MERCURY

A novel squaraine-based chemosensor SQ-1 has been synthesized, and its sensing behavior toward various metal ions was investigated by UV- vis and fluorescence spectroscopies. In AcOH-H2O (40:60, v/v) solution, Hg2+ ions coordinate with SQ-1 causing a deaggregation which induces a visual color and absorption spectral changes as well as strong fluorescence. In contrast, the addition of other metals (e.g., Pb2+, Cd2+, Cu2+, Zn2+, Al3+, Ni2+, Co2+, Fe3+, Ca2+, K+, Mg2+, Na+, and Ag+) does not induce these changes at all. Thus SQ-1 is a specific Hg2+ sensing agent due to the inducing deaggregation of the dye molecule by Hg2+.

• 出版日期2011-3-4
• 单位福州大学