摘要
应用荧光光谱、紫外光谱对不同结构的含炔基有机硅共轭聚合物的发光性能进行了表征和研究。探讨了聚合物主链上Si原子取代基的结构以及主链中炔基单元结构对其发光性能的影响,研究结果表明,聚合物可在219～260 nm处有紫外吸收,随着Si原子上取代基共轭性能的增强,以及主链中炔基数目的增多、链段共轭程度的增大,最大吸收波长红移。取代基的影响较小,主链共轭结构对吸收光谱的影响明显。不同主链结构的共轭聚合物在320～353 nm处发出一定强度的荧光。结果显示,聚合物主链共轭基团的结构对发射光谱具有明显的影响,随着主链中炔基数目的增多,最大发射波长显著向长波方向移动。由于此类聚合物的特殊结构使得他们具有良好的热学稳定性,因此这类聚合物具有潜在的光学应用价值。
In the present paper, a series of novel conjugated polymers, poly[（silylene）acetylene silanes] with different structure, were prepared, and the luminescence performance of the poly[（silylene）acetylene silanes] with different substituents were investigated by the fluorescence and UV absorption spectroscopic approaches. The effect of different substituents and the number of acetylene in the main chain on the luminescence was discussed in depth. The result showed that these polymers have moderate absorbance in the range from 219 to 260 nm. The red shift was showed for the maximum absorbanee wavelength following the increase in the number of the acetylene and the degree of the conjugation in the main chain. There was insignificant difference in the maximum ahsorhanee wavelength of the polymers with dimethy and diphenyl. In short, the influence of the substituents is insignificant. However, the remarkable effect was induced by the conjugated structure in the main chain. The conjugated polymers with different structure in the main chain have moderate fluorescence and emission quantum yields. The authors studied the influence of the polymers＇ structure on the luminescence performance. As a result, the influence of the substituents is insignificant for emission spectra. The influence of the conjugated groups in the main chain of the polymers is remarkable. The maximum emission wavelength of the polymers showed an evident shift to red range with the enhancement of the conjugated extent. These polymers had good thermal properties for the special structures. So they have potential applications for emission materials with good thermal stability.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2009年第6期1665-1667,共3页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(20577016)
山东省自然科学基金项目(Y2008B44)
山东省优秀中青年科学家科研奖励基金项目(2008BS09006)资助
关键词
炔基
有机硅聚合物
荧光光谱
紫外光谱
Acetylene
Poly[（silylene） silane]
Fluorescence
UV-Vis spectra
