Determination of trace europium(III) based on a new fluorescence enhancement system of europium(III) with N,N′-bis-(4-N-aminothiourea-2-amylidene)-4,4′-diaminodiphenyl sulfone by EDTA or alumin in N,N-dimethylformamide

摘要: A new bis-Schiff base ligand, N,N′-bis-(4-N-aminothiourea-2-amylidene)-4,4′-diaminodiphenyl sulfone (ARADS), was synthesized. The solutions of its complex with Eu3+ in DMF can emit the intrinsic fluorescence Eu3+. intensity enhanced 20–30-fold presence EDTA (or alum). influence seven kinds solvents (DMF, CH3CN, THF, acetone, CH3OH, C2H5OH, and DMSO) on studied. results showed that Eu3+-ARADS-EDTA alum) system emits strongest DMF. Thus, be used to develop a method for determination europium(III). excitation emission wavelengths are 395 615 nm, respectively. Under optimal conditions, intensities vary linearly concentration range 6.0 × 10−10−5.2 10−5 mol/L, detection limit 5.0 10−10 mol/L. interference from some rare earth metals other inorganic ions described. is selective, sensitive, rapid, simple analytical procedure europium(III) high-purity yttrium oxide synthetic samples. mechanism enhancement also