New fluorescent rhodamine hydrazone chemosensor for Cu(II) with high selectivity and sensitivity.

@article{Xiang2006NewFR,
  title={New fluorescent rhodamine hydrazone chemosensor for Cu(II) with high selectivity and sensitivity.},
  author={Yu Xiang and Aijun Tong and Peiyuan Jin and Yong Ju},
  journal={Organic letters},
  year={2006},
  volume={8 13},
  pages={2863-6}
}
[reaction: see text] A new fluorescent probe, salicylaldehyde rhodamine B hydrazone (1), was synthesized and displayed selective Cu(II)-amplified absorbance and fluorescence emission above 500 nm in neutral buffered media. Upon the addition of Cu(II), the spirolactam ring of 1 was opened and a 1:1 metal-ligand complex was formed. The detection of Cu(II) by 1 at a lower micromolar level was successful even in buffered water. 

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