不同合成方法对稀土离聚体荧光性质影响

STUDIFS ON THE CHEMICAL AND PHYSICAL FUNCTIONS OF IONOMERS

不同制备方法，即以丙烯醚丁酯与丙烯的共聚物为基础，经离子交联而制得的稀土离聚体（方法Ⅰ）及以丙烯酸丁酯与盐基性单体丙烯醚稀土盐共聚而制得的稀土离聚体（方法Ⅲ）在荧光性质上的差异，研究了不同结构因素对它们的荧光性质的影响规律。随着体系中稀土金属离子含量的增大，方法Ⅰ所得离聚体出现了浓度淬灭现象，而方法Ⅲ所得离聚体则无此现象，从一个侧而反映了其聚集态差别。

The different synthetic methods affect greatly the fluorescence properties of ionomers.With the increasing of rare earth metal ion content in system, the ionomers made by method I displayed typical concentration genching pattern. The fluorescence intensity reached a maximum at 4%￣5% (mass) content of Eus￣(3+) or 3%￣4% (mass) content of Tb￣(3+) and subsequently dacreased with the further increasins of Eu￣(3+) and Tb￣(3+) content in ionomers. The results provide supporting evidence that the ionomers have the ionic aberegates, in which the local concentration of Eu￣(3+) and Tb￣(3+) ions are much higher than that in the other regions. But the same fluoreeence action was not discovered in the Eu and Tb ionomers synthesized by method Ⅱ.