铽配合物荧光及在农用光波长转换塑料薄膜中的应用

选择荧光效应强的稀土元素铽，以磺基水杨酸作为第一配体，以聚乙烯醇、聚乙二醇2000等为协配体，对乙醇溶液和水溶液两个体系中形成的配合物荧光进行了研究。试验确定了铽、磺基水杨酸以及聚乙烯醇、聚乙二醇2000为优良协配体的最佳用量。进一步研究发现，表面活性剂的加入对不同配合物的荧光均会产生增强效果，十二烷基磺酸钠效果最好;同时探索了酸度对体系荧光强度的影响。对于获得的铽-磺基水杨酸-聚乙烯醇配合物，其荧光激发波长为342 nm，而荧光发射波长为545 nm，将该配合物以适当比例掺加到农用塑料薄膜中，制备出可以使太阳光的紫外部分转换为作物光合作用需要的绿光的稀土光转换膜。

The Fluorescence of Terbium Complex and Its Application in Wavelength Conversion Membrane

Terbium was selected as test material for its strong fluorescence effect, and sulfosalicylic acid was used as first ligand, polyvinyl alcohol and polyethylene glycol 2000 as co-ligand, the fluorescence property of complexes in the two systems of ethanol solution and aqueous solution was explored. It was obtained that the polyvinyl alcohol and polyethylene glycol 2000 are the excellent co-ligands. Further study showed that sufactant is good for fluorescence enhancement of the different complexes and especially sodium dodecyl sulfate is best while exploring the impact of acidity on the fluorescence intensity. Terbium-sulfosalicylic acid-polyvinyl alcohol complex was obtained under the conditions of 342 nm for excitation wavelength, and 545 nm for emission wavelength. Mixing the complex into the plastic film in proper proportion, the authors prepared the rare earth light conversion membrane which allowed ultraviolet portion of sunlight to convert to green light the crop photosythesis needed to effectively improve the photosynthetic efficiency.