A highly selective naked-eye colorimetric sensor for acetate ion based on 1,10-phenanthroline-2,9-dicarboxyaldehyde-di-(p-substitutedphenyl-hydrazone).
A new and simple colorimetric sensor with high selectivity for acetate ion based on 1,10-phenanthroline-2,9-dicarboxyaldehyde-di-(p-substitutedphenylhydrazone) receptor 2 has been synthesized. The selectively binding ability of receptor 2 to acetate ion over other anions tested was demonstrated by UV-vis absorption spectroscopy in DMSO. Comparing with other anions studied, the UV-vis absorption spectrum in dimethyl sulfoxide shows significant response toward acetate ion with high selectivity, and meanwhile dramatic color change is observed from yellow to green in the presence of acetate ion (5 x 10(-6)mol/L). Little UV-vis absorption spectrum change has occurred when receptor 2 was titrated with other different guest (F(-), Cl(-), Br(-), I(-), H(2)PO(4)(-) and OH(-)). In addition, the (1)H NMR spectrum titration shows deprotonation of the receptor in the presence of acetate ion.
Qiao
Yan-Hong
YH
Department of Chemistry, Nankai University, Tianjin 300071, People's Republic of China.
Lin
Hai
H
Shao
Jie
J
Lin
Hua-Kuan
HK
D000085:Acetates / Q000737:chemistry*; D003124:Colorimetry / Q000295:instrumentation / Q000379:methods; D006835:Hydrazones / Q000737:chemistry*; D007202:Indicators and Reagents / Q000737:chemistry*; D015394:Molecular Structure; D010618:Phenanthrolines / Q000737:chemistry*
C519844:1,10-phenanthroline-2,9-dicarboxylic acid; D000085:Acetates; D006835:Hydrazones; D007202:Indicators and Reagents; D010618:Phenanthrolines