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学科主题: 高分子化学
题名: Alkyl side chain driven tunable red-yellow-green emission: Investigation on the new pi-conjugated polymers comprising of 2,7-carbazole unit and 2,1,3-benzo-thiadiazole units with different side chains
其他题名: Alkyl side chain driven tunable red-yellow-green emission: Investigation on the new pi-conjugated polymers comprising of 2,7-carbazole unit and 2,1,3-benzo-thiadiazole units with different side chains
作者: Du JP(杜俊平) ; Xu EJ(许二建) ; Zhong HL(钟洪亮) ; Yu F(余锋) ; Liu C(刘畅) ; Wu HR(吴欢荣) ; Ceng DL(曾丹黎) ; Ren SJ(任世杰) ; Sun J(孙晶) ; Liu YC(刘迎春) ; Cao AM(曹阿民) ; Fang Q(房强)
通讯作者: 房强
刊名: J. Polym. Sci. Pol. Chem.
发表日期: 2008
卷: 46, 期:4, 页:1376-1387
收录类别: SCI
部门归属: 上海有机所; 上海广电电子股份有限公司平板显示研究中心
英文摘要: Four new soluble polymers containing a 2,7-carbazole unit and a 2,1,3-benzothiadiazole unit in the main chain were synthesized by Suzuki polycondensation. Variation of the substituent groups (R) at 5-position of 2,1,3-benzothiadiazole unit resulted in different color emission of the copolymers. Thus, when R was -CH3 (or -H), the polymer showed yellow-green (or red) emission; whereas the polymers showed the emission from green to yellow-green, when R was -CH2(CH2)(5)CH3 or -CH2OCH(CH3)(2). To investigate the nature of the color change, a Gaussian 03 program was used for estimation of the dihedral angles between a 5-R-2,1,3-benzothiadiazole unit and a 2,7-carbazole unit. The results showed that the different substituents at 5-position of 2,1,3-benzothiadiazole brought about different the dihedral angles, which gave the different conjugation levels to the polymers. Hence, the tunablity of emission color may be attributed to the different conjugation levels between 2,7-carbazole units and 5-R-2,1,3-benzothiadiazole units induced by simply changing substituent groups at 5-position of benzothiadiazole unit. Electrochemically, the copolymers exhibited a higher oxidation potential as well as the reversible reduction behavior bearing from 2,1,3-benzothiadiazole unit. To investigate the electroluminescent properties of the polymers, the nonoptimized devices were fabricated and the results showed that the electroluminescent emission wavelength was basically similar to that of the photoluminescent. All polymers showed good thermal stability with 5 wt % loss temperature of more than 296 degrees C. (C) 2008 Wiley Periodicals, Inc.
语种: 英语
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WOS记录号: WOS:000253221300021
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/22936
Appears in Collections:高分子材料研究室_期刊论文

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Recommended Citation:
Du JP,Xu EJ,Zhong HL,et al. Alkyl side chain driven tunable red-yellow-green emission: Investigation on the new pi-conjugated polymers comprising of 2,7-carbazole unit and 2,1,3-benzo-thiadiazole units with different side chains[J]. J. Polym. Sci. Pol. Chem.,2008,46(4):1376-1387.
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