Fluorescence Reaction AmongN-(Phenyl)-N-(4-Methylquinolinyl) Amine Derivatives, Hydrogen Peroxide and Cobalt(II), and its Application

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Abstract
The fluorescence reactions among seven N-(phenyl)-N-(4-methylquinolinyl)amine derivatives, hydrogen peroxide as a redox agent and cobalt (II), in the presence or absence of various surfactants, were systematically investigated. The order of the relative fluorescence intensities (R. fl. Int.) of these fluorescence products were N-(4′-hydroxyphenyl)-N-(4-methylquinolinyl)amine (IV), N-(2′-hydroxyphenyl)-N-(4-methyl quinolinyl)amine(11) > 3′-hydroxy-4 ′-carboxyphenyl)-N-(4- methylquinolnyl)amine(MQAB)(VII))> N-(3′-hydroxyphenyl)-N-(4 methylguinolinyl)amins(III) > N-(phsnyl)-N-(4-methylquinolinyl)amine(I)) >N-(4′-carboxyphenyl)-N-(4-methylquinolinyl)amine(V) >N-(3′-carboxyphenyl)-N-(4-methylquinolinyl)amine(VI)- fluorescence products. Especially, the R.fl.Int. using (IV) in the presence of cationic surfactants inbssic media was most large and stable, and asimple, rapid and eensitive spect- rofluorometric method for the determination of cobalt(II) using (IV) and hydrogen peroxide in the presence of trimethylstearylammonium chloride(5TAC) was proposed without the need of organic solvent extraction. The calibration graph was linear in the range of 0.2 to 15 ng cobalt(f1) per 10 ml at 522 nm emission wavelength with excitation wavelength of 410 nm, and wan about 3-fold more aeneitivo than the previous method with (W).