脂肪酸铕配合物掺杂聚乙烯、聚丙烯和聚苯乙烯光致发光复合材料

Polyethylene,Polypropylene or Polystyrene Photoluminescence Composites Doped with Fatty Acid Europium Complexes

合成了正己酸铕、正辛酸铕、月桂酸铕和硬脂酸铕4种不同碳链链长的脂肪酸铕配合物,通过哈克转矩流变仪将铕配合物(质量分数1%)机械掺杂于3种不同透明度的聚乙烯(PE)、聚丙烯(PP)和聚苯乙烯(PS)通用树脂中,制备了系列铕配合物掺杂聚合物光致发光复合材料,考察了配体、配合物、聚合物基体对复合材料的外观、透明性及其荧光性能的影响。结果表明,4种脂肪酸铕配合物及其掺杂的复合材料在紫外光的激发下均在593、617 nm处发射强的Eu3+离子5D0→7F1、5D0→7F2跃迁的特征荧光;脂肪酸配体的碳链长短对铕配合物及复合材料的发光影响较小;PE、PP复合材料发光颜色与红光铕配合物相同,PS复合材料因基体PS和Eu3+离子的发光共同作用而呈现了玫瑰红的荧光发射。

Fatty acid europium complexes were synthesized with hexanoic acid, octanoic acid, lauric acid or stearic acid as the ligands. The polyethylene （PE）, polypropylene （PP） or polystyrene （PS） photoluminescenee composites doped with europium complexes were prepared by the Haake torque rheometer. The influences of ligands, europium complexes and polymer matrixes on the appearance, transparency and luminescence properties of the composites were investigated. These fatty acid europium complexes and their composites emit strong characteristic luminescence of europium ions 5D0→7F1 and 5D0→7F2 respectively, at 593, 617 nm under ultraviolet light excitation. The luminescence of europium complexes and their composites are less affected by the chain length of the fatty acid. The PP or PE composites emit only characteristic red fluorescence of the Eu3＋ ions under ultraviolet light, while a rosy fluorescence emission of the PS composites is demonstrated to arise from a combination of strong red light-emitting of the Eu3＋ ions and weak blue-violet light-emitting of the PS matrix.