Novel near-infrared luminescent linear copolymer based on tris(8-hydroxyquinoline)erbium

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• 作者：Jianxin Luo^a ; ^b ; ^{luojianxin392@163.com} ; Chunyan Zhang^a ; Chaolong Yang^b ; Mangeng Lu^b
• 关键词：Near-infrared luminescence ; Tris(8-hydroxyquinoline)erbium ; Copolymer ; Energy transfer
• 刊名：Synthetic Metals
• 出版年：2012
• 期刊代码：77_03796779
• 类别：ph
• 出版时间：April, 2012
• 卷：162
• 期：5-6
• 页码：431-435
• 文件大小：590 K

摘要

A novel near-infrared (NIR) luminescent linear copolymer based on tris(8-hydroxyquinoline)erbium (ErQ₃), PCzErQ₃, was synthesized and characterized. The copolymer had appropriate molecular weight as well as good solubility in common organic solvents. The glass transition temperature (T_g) and the temperature of 5%weight loss (T_d) for the copolymer were 200 掳C and 368 掳C respectively, indicating that the copolymer had excellent thermal stability. Absorption and photoluminescence (PL) spectra of the copolymer were recorded and PL decay analysis was measured. Excited at the absorption band of carbazole (235, 265 and 295 nm) and metalloquinolate (390 nm), the copolymer emitted the characteristic NIR-luminescence of Er^III ion. The result indicates that the energy absorbed by carbazole (light-harvesting group) was transferred to 8-hydroxyquinoline (coordination group), where it is finally transferred to Er^III ion. In addition, the full width at half maximum (FWHM) centered at 1525 nm in the PL emission spectrum of the copolymer was 92 nm, which enabled a wide gain bandwidth for optical amplification.