Colorimetric recognizing of biologically important anions based on anion-induced tautomerism of the sensor.
The anion sensing ability of compound 1 based on a novel 2,4-dinitrophenylhydrazone derivative was studied through "naked-eye" experiment, UV-Vis spectral titration, and (1)H NMR titration. Sensor 1 was synthesized through a simple method with high yield. The solution of host 1 turned deep purple from light purple in the presence of the strong basic anions and turned yellow upon addition of the weak basic anions, respectively. The results could be explained on the basis of transfer of the tautomeric equilibrium of sensor 1 induced by anions with different basicity.
Shao
Jie
J
Department of Chemistry, Nankai University, Tianjin 300071, People's Republic of China.
Yu
Xudong
X
Lin
Hai
H
Lin
Huakuan
H
D000838:Anions / Q000737:chemistry*; D015374:Biosensing Techniques / Q000379:methods*; D003124:Colorimetry / Q000379:methods; D006835:Hydrazones / Q000737:chemistry*; D007536:Isomerism; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D013056:Spectrophotometry, Ultraviolet
C001072:2,4-dinitrophenylhydrazone; D000838:Anions; D006835:Hydrazones