Synthesis Of Azo Hydroxybenzo[H]Quinoline Derivatives And Recognition Of Anions

Chapter1:The concept of supramolecular chemistry, molecular recognition, anionic significance of study and general principles of the structural features of the anion recognition receptors are introduced in detail. A brief commentary on anion chromophore and fluorescent chemical identification and sensing literature is summarized from the recent years at home and abroad. Finally the scope of thesis is introduced.Chapter2:7-(4-nitrophenyl) azo-10-hydroxybenzo[h] quinoline (Compound1) is synthesized and characterized by1HNMR,13CNMR and IR. Their sensing of anions were explored using UV-vis spectroscopy. The interactions between artificial hosts and anions such as AcO-, F-, HSO4-, Cl-, I-and Br-in acetonitrile were investigated by UV-vis spectroscopy. The experimental results showed that the compound has a selective recognition to F-, which causes the ultraviolet absorption spectrum of compound1to change and the color of the solution changes from yellow to blue. Linear range of detection of F-is1.0×10-4-7.5×10-4mol/L and the detection limit is1.35×10-6mol/L.Chapter3:7-(2-nitrophenyl) azo-10-hydroxybenzo[h] quinoline (Compound2) is synthesized and characterized by1HNMR,13CNMR and IR. Their sensing of anions were explored using UV-vis spectroscopy. The interactions between artificial hosts and anions such as AcO-, F-, HSO4-, Cl-I-and Br-in acetonitrile were investigated by UV-vis spectroscopy. The experimental results showed that the compound has a selective recognition to F-, which causes the ultraviolet absorption spectrum of compound2to change and the color of the solution changes from yellow to purple. Linear range of detection of F-is1.0×10-3-4.0×10-3mol/L and the detection limit is1.43×10"5mol/L.Chapter4:7-(4-chlorophenyl) azo-10-hydroxybenzo[h] quinoline (Compound3) is synthesized and characterized by1HNMR,13CNMR and IR. Their sensing of anions were explored using UV-vis spectroscopy. The interactions between artificial hosts and anions such as AcO-, F-, HSO4-, Cl-, I-and Br-in acetonitrile were investigated by UV spectroscopy. The experimental results showed that the compound has a selective recognition to F-, which causes the ultraviolet absorption spectrum of compound3to change and the color of the solution changes from yellow to red. Linear range of detection of F-is5.0×10-4-×10-3mol/L and the detection limit is1.9×10-5mol/L.