A rhodamine-based chromogenic and fluorescent chemosensor for copper ion in aqueous media

作者：Zhao Minglei; Yang Xiao Feng^*; He Shenfeng; Wang Liping

来源：Sensors and Actuators B: Chemical , 2009, 135(2): 625-631.

DOI：10.1016/j.snb.2008.10.044

• Chemosensor
• Cu(2 )
• Rhodamine B
• Spirolactam

A rhodamine-based chemosensor for copper ion, 1-(rhodamine B)lactam-thiosemicarbazide (I), was designed and synthesized. Compound I is a colorless, non-fluorescent compound and was synthesized via the one-step reaction of rhodamine B hydrazide with KSCN in acidic medium. Upon mixing Cu(2 ) in acetonitrile-water (30:70, v/v) solution, the spirolactam ring of I was opened, which resulted in the dramatic increases in both fluorescence and absorbance of the mixing solution. Based on this mechanism, a chromo- and fluorogenic chemosensor for Cu(2 ) was developed. The fluorescence and absorbance signal are linear with Cu(2 ) concentration in the range 0.2-4.0 mu mol L(-1) and 0.5-10 mu mol L(-1), respectively.

• 出版日期2009-1-15
• 单位西北大学