New fluorescent rhodamine hydrazone chemosensor for Cu(II) with high selectivity and sensitivity.
[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.
Xiang
Yu
Y
Department of Chemistry, Tsinghua University, Beijing, PR China.
Tong
Aijun
A
Jin
Peiyuan
P
Ju
Yong
Y
D003300:Copper / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure; D012235:Rhodamines / Q000138:chemical synthesis* / Q000737:chemistry
D005456:Fluorescent Dyes; D012235:Rhodamines; C518469:salicylaldehyde rhodamine B; D003300:Copper