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具有1,6-对苯蒽发色基团的聚酯衍生物薄膜(PE)可产生较强的蓝绿色荧光,同时在紫外光照射下出现光退化现象。PE的发光强度随着照射时间的增加迅速减弱,然后逐渐趋于饱和,荧光光谱由500nm逐渐蓝移至450nm;光退化了的聚酯衍生物薄膜经过加热80~100℃至少1h的退火处理,发光强度可以恢复到照射前的水平,如果再经受紫外光照射,发光强度会再次降低,加热后发光强度又可以基本完全恢复,如此过程可以反复多次。具有这类发光现象材料可望成为可擦涂的光记录介质。通过对带1,6-对苯蒽发色基团的其它聚合物和化合物的测量和分析,探讨了这种发光现象的本质。
Polyester derivative films (PE) with 1,6-para-anthracene chromophore groups produce stronger cyan fluorescence with photodegradation under UV illumination. The luminescence intensity of PE decreased rapidly with the increase of irradiation time, then gradually became saturated. The fluorescence spectrum was gradually blue shifted from 500nm to 450nm. The photo-degraded polyester derivative film was annealed at 80-100 ℃ for at least 1h, Luminous intensity can be restored to the level before irradiation, and then if subjected to ultraviolet light irradiation, the luminous intensity will be reduced again, the luminous intensity after heating can be basically completely restored, so the process can be repeated several times. It is expected that such a light-emitting material will be an erasable optical recording medium. By measuring and analyzing other polymers and compounds with 1,6-para-anthracene chromophore, the nature of this luminescence phenomenon was explored.