Purple photoluminescence from banana-shaped molecules 1,3-phenylene bis(4-methoxybenzylideneamine)

摘要：

The optical absorption and photoluminescence spectra of banana-shaped molecules 1,3-phenylene bis(4-methoxybenzylideneamine) have been investigated with an ultraviolet-visible spectrometers and a spectrofluorometer, respectively. The optical characterizations indicate that the banana-shaped molecules exhibit strong absorptions in a broad range of 260-370 nm and that they can give off strong purple photoluminescence when excited by ultraviolet photons. Using Hückel tight-binding program, we have calculated the electronic structures of the banana-shaped molecules. In light of the calculated electronic structures, the origin of the purple photoluminescence is discussed, and our results have demonstrated that not only the lowest unoccupied molecular orbital and the highest occupied molecular orbital but also the localized energy levels of the lone pairs are responsible for the recorded purple photoluminescence.

关键词： Banana-shaped molecule Photoluminescence Electronic structures Huckel tight-binding method

作者: Yuan Ming Huang Bao-gai Zhai

作者单位: College of Physics & Electronic Information, Yunnan Normal University, Yunnan 650092, China Modern Educational Technology Center, Yunnan Normal University, Yunnan 650092, China

会议类型: 国际会议

会议名称: 2009 International Symposium on Liquid Crystal Science and Technology(2009国际液晶科技研讨会)

会议地点: 昆明

会议语种:英文

页码: 182-185

在线出版日期: 2009-08-02（万方平台首次上网日期，不代表论文的发表时间）