Abstract
Na2CO3 being used as the base and kernel,a new type of core-shell fluorescent material terbium complex was obtained by reaction of it with terbium and organic ligands acetylsalicylic acid( aspirin). The fluorescence micro images show that the composite materials emit bright green fluorescence which attribute to the emission of terbium ion. The excitation spectra shapes of the composite materials change with the varying of amount of sodium carbonate,demonstrating that the structures of terbium complexes on the surface of sodium carbonate are different. The fluorescence intensity of the composite material shows a downward trend with the increasing of the amount of sodium carbonate,and the average fluorescence lifetime shows an upward trend.
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