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在18至300K的温度范围内,对聚乙炔的一种单取代衍生物的荧光特性进行了研究。在室温时,这种聚乙炔的单取代衍生物的薄膜能够发出强的绿色荧光,其荧光光谱的主要荧光峰位于510nm,而它的两个次要荧光峰分别位于440nm和380nm。位于510、440nm的两个荧光峰分别是该高分子材料所形成的激发缔合物的主要和次要发光峰,而位于380 nm的荧光峰是单条高分子链的发光峰。当温度从300K降到18K的过程中,原荧光光谱发生中的激发缔合物的主要发光峰从510 nm逐渐红移到570 nm,而其激发缔合物的次要发光峰逐渐消失;与此同时,该高分子材料的380nm的荧光峰逐渐与主荧光峰分开。这些光谱方面的变化可用该高分子在低温下所发生的结构上的变化来解释。
Fluorescence properties of a monosubstituted derivative of polyacetylene were studied in the temperature range of 18 to 300K. The thin film of monosubstituted derivative of this polyacetylene emits strong green fluorescence at room temperature with a major fluorescence peak at 510 nm and two minor fluorescence peaks at 440 nm and 380 nm, respectively. The two fluorescence peaks at 510 and 440 nm are the major and minor emission peaks of the excited complex formed by the polymer material, respectively. The fluorescence peak at 380 nm is the emission peak of a single polymer chain. When the temperature dropped from 300K to 18K, the main luminescence peak of the excited complex in the original fluorescence spectrum red-shifted from 510 nm to 570 nm, while the secondary luminescence peak of the excited complex gradually disappeared. At the same time, the fluorescence peak of 380nm of the polymer gradually separates from the main fluorescence peak. These spectral changes can be explained by the structural changes that occur in the polymer at low temperatures.