稀土铕配合物在荧光防伪油墨中的应用

以铕离子(Eu3+)为中心,以苯甲酰丙酮(BZA)、苯甲酸(BA)、邻菲咯啉(Phen)为配体,在无水乙醇中合成了三元配合物Eu(BZA)3Phen与Eu(BA)3Phen.配合物的紫外可见光谱与红外光谱分析表明配体与铕离子发生配位,合成了三元配合物.研究配合物的荧光性能,发现Eu(BZA)3Phen的相对荧光强度大于Eu(BA)3Phen.将荧光强度高的Eu(BZA)3Phen作为荧光剂制备了荧光防伪油墨.荧光防伪油墨的荧光性能显示,油墨与配合物Eu(BZA)3Phen发射波长相同,均为612,nm.荧光防伪油墨在可见光下无色,在紫外灯下呈现红色,可用于防伪包装印刷.

Application of Rare Earth Europium Complexes in Fluorescent Falsification-resistant Ink

Two series of ternary europium complexes of Eu(BZA)3Phen and Eu(BA)3Phen were synthesized in absolute ethanol with europium(Eu3+),benzoylacetone(BZA),benzoic acid(BA)and 1,10-phenanthroline(Phen)as agents.The UV spectrum and IR spectrum analyses of the complexes showed the coordination of the ligand with Eu ions and the successful synthesis of ternary europium complexes.The fluorescent properties of the rare earth europium complexes were studied.The result indicated that the relative fluorescence intensity of Eu(BZA)3Phen was greater than that of Eu(BA)3Phen.Fluorescent falsification-resistant ink was prepared with the synthesized Eu(BZA)3Phen and its fluorescence spectrum was measured.The emission wavelengths of the printing ink and that of the fluorescent agent are of the same values of 612,nm.Fluorescent falsification-resistant ink is colorless in visible lights,and it becomes visible red silver under the ultraviolet lamp,so it is suitable for falsification-resistant packaging printing.