水溶性纤维素醚/Eu(Ⅲ)的合成及发光特性

The synthesis and luminescence property of water-soluble cellulose ethers/Eu(Ⅲ)

合成了具有发光性能的水溶性纤维素醚/Eu(Ⅲ)的配合物,即羧甲基纤维素(CMC)/Eu(Ⅲ)、甲基纤维素(MC)/Eu(Ⅲ)和羟乙基纤维素(HEC)/Eu(Ⅲ),讨论了这些配合物的结构,并由FTIR加以证实。这些配合物的发射光谱为Eu(Ⅲ)在615nm处的电偶极跃迁(由5D0→7F2)所产生。CMC的取代度对CMC/Eu(Ⅲ)的荧光光谱和强度都产生影响。Eu(Ⅲ)含量也对配合物的荧光强度产生影响,当Eu(Ⅲ)含量为5%(质量比)时,这些水溶性纤维素醚/Eu(Ⅲ)配合物的荧光强度均达到最大。

In this paper, we synthesized the coordination complexes of water-soluble cellulose ethers/Eu（ Ⅲ ） with fluorescence emission, i. e. CMC/Eu（ Ⅲ ）, MC/Eu（ Ⅲ ） and HEC/Eu（ Ⅲ ）. Theft structures were discussed and confirmed By FTIR. The emission spectra of these coordination compounds consist of emission of Eu （Ⅲ） electric dipole transition. The main peak of 615nm was originated from 5D0→^7F2 transition. DSs of CMC effect not only the Huorescence spectrum hut also the fluorescence intensity （FI） of CMC/Eu（ Ⅲ ）. And the contents of Eu（ Ⅲ ） also have effect on the FI of these coordination complexes. The fluorescence intensities of the coordination complexes all reach maximum when Eu（ Ⅲ）content was 5% （wt/wt）.