羧甲基纤维素/Eu^(3+)体系的荧光性能的研究

Studies on Fluorescence Behaviors of the Carboxymethylcellulose-Europium Complexes System

以脱脂棉纤维为原料合成不同取代度的羧甲基纤维素（ＣＭＣ），再使之与稀土离子Ｅｕ３＋作用，合成ＣＭＣ／Ｅｕ３＋荧光体系并考察其荧光性能。结果表明：无论是ＣＭＣ／Ｅｕ３＋固体状态体系，还是ＣＭＣ／Ｅｕ３＋水溶液体系均有较强的荧光性能，但其固体体系的荧光强度较水溶液体系的强；且固体状态体系与水溶液状体系的荧光发射波长有所不同。

Europium(Ⅲ) ion formed complexes with a series of CMCs with different degrees of substitution(D.S) in aqueous solution. The fluorescence behavior of these complexes, both in their solid states system and in aqueous solution system, were studied. It has been recorded that the complexes in both systems displayed the fluorescence emission at 615nm with the exciting wavelength at 394nm (in solid states) and 423nm (in aqueous solution) respectively, at room temperature. However, the emition intensities of the complexes in solid states were much stronger than those in aqueous solution. In addition, the result showed that the fluorescence intensities of CMC/Eu3+ complexes,in which D.S of CMC was different, were unequal. When D.S was 0.89 in solid state, the fluorescence intensity was at its maximum. The other investigation showed the fluorescence intensities of CMC/Eu3+ complexes reached a maximum at Eu3+ content 5wt% in both systems.