Single sensor for two metal ions: colorimetric recognition of Cu2+ and fluorescent recognition of Hg2+.
The first novel rhodamine B based sensor, rhodamine B hydrazide methyl 5-formyl-1H-pyrrole-2-carboxylate Schiff base (2) capable of detecting both Cu(2+) and Hg(2+) using two different detection modes has been designed and synthesized. The metal ion induced optical changes of 2 were investigated in MeOH:H(2)O (3:1) HEPES buffered solution at pH 7.4. Sensor 2 exhibits selective colorimetric recognition of Cu(2+) and fluorogenic recognition of Hg(2+) with UV-vis and fluorescence spectroscopy, respectively. Moreover, both of the Cu(2+) and Hg(2+) recognition processes are proven to be hardly influenced by other coexisting metal ions.
College of Chemistry and Chemical Engineering, Liaoning Key Laboratory for the Synthesis and Application of Functional Compounds, Bohai University, Jinzhou, China. lijuntang@tom.com
Lijun
L
Tang
Fangfang
F
Li
Minghui
M
Liu
Raju
R
Nandhakumar
D003124:Colorimetry / Q000379:methods*; D003300:Copper / Q000737:chemistry*; D006801:Humans; D007477:Ions / Q000737:chemistry*; D008628:Mercury / Q000737:chemistry*; D008670:Metals / Q000737:chemistry; D015394:Molecular Structure; D012235:Rhodamines / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*
D007477:Ions; D008670:Metals; D012235:Rhodamines; D003300:Copper; D008628:Mercury; C029773:rhodamine B