A highly sensitive and selective ratiometric and colorimetric sensor for Hg2+ based on a rhodamine–nitrobenzoxadiazole conjugate

作者: Ke Liu , Yi Zhou , Cheng Yao

DOI: 10.1016/J.INOCHE.2011.08.013

关键词:

摘要: Abstract An effective Hg 2+ -specific probe ( 1 ) was designed and prepared based on a rhodamine–nitrobenzoxadiazole conjugate. The sensing behavior of this studied by UV–visible fluorescence spectroscopy. With , the displayed both colorimetric responses ratiometric changes. ratio absorption intensities at 525 460 nm for two chromophores in increased from 0.17 to 0.46. exhibited excellent selectivity sensitivity towards over other metal ions, which could be attributed -triggered ring opening spirolactam rhodamine moiety formation 1:1 -Hg complex.

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