新型双发色团固体激光染料的荧光性能

合成了带可聚合双键的若丹明，１，８－萘酰亚胺衍牲单体，并将它们与甲基丙烯酸甲酯共获得一系列双发色团共聚物。测定了其中各个单体的含量以及平均分子量。其吸收光谱显示，在基态下共聚物中两个发色团单体之间没有相互作用或作用很小。然而，在荧光光谱中发现某些共的中其Ｎ－ＡＥ部分荧光部分猝灭，而其Ｒ部分荧光增强，说明这些共聚物中存在着有效的分子内单线态－单线态能量传递现象。

The Fluorescence Properties of Novel Dichromophoric Copolymers Used as Solid-state Laser Dyes

Modified rhodamine 6G molecule (Rh Al) with polymerizable double bonds has been copolymerized with methyl methacrylate (MMA) and 1,8 naphthalimide derivative (N AE). The percents of the two monomers (Rh Al and N AE) and the average molecular weight of the copolymers have been measured. Their absorption spectra show that there is little or no interaction between the two chromophores in their ground state. However, their fluorescence spectra indicate that the fluorescence emission of N AE is partly quenched and that of Rh Al is improved in some copolymers, which shows that in the excited state there exists very effective intramolecular singlet singlet energy transfer (Intra SSET) from N AE to Rh Al in these copolymers.