Synthesis and Properties of Carbazole Main Chain Copolymers with Oxadiazole Pendant toward Bipolar Polymer Host: Tuning the HOMO/LUMO Level and Triplet Energy
文献类型：期刊论文
| 作者 | Zhang, Kai1; Tao, Youtian1; Yang, Chuluo1; You, Han2; Zou, Yang1; Qin, Jingui1; Ma, Dongge2 |
| 刊名 | CHEMISTRY OF MATERIALS
 |
| 出版日期 | 2008-12-09 |
| 卷号 | 20期号:23页码:7324-7331 |
| ISSN号 | 0897-4756 |
| DOI | 10.1021/cm802240q |
| 英文摘要 | Three new carbazole copolymers, poly(9-(2,5-diarene-[1,3,4]oxadiazole)-carbazole-alt-9-(2-ethylhexyl)-carbazole-3,6-diyl)s (P1), poly(9-(2,5-diarene-[1,3,4]oxadiazole)-2, 7-carbazole-alt-9-(2-ethylhexyl)-3, 6-carbazole-diyl)s (P2), and poly(9-(2,5-diarene-[1,3,4]oxadiazole)-carbazole-alt-9-(2-ethylhexyl)-carbazole-2,7-diyl)s (P3), were synthesized by the Suzuki coupling reaction. The copolymers were characterized by (1)H NMR, (13)C NMR, and elements analysis, and their molecular weights were estimated using gel permeation chromatography. The TGA and DSC results revealed their good thermal stability with high glass-transition temperatures (T(g)) at 211 degrees C (P1), 194 degrees C (P2), and 208 degrees C (P3), respectively. The copolymers exhibited blue emission with significantly improved fluorescence quantum efficiencies compared to their analogous polymers. The triplet energies of PI, P2, and P3 were determined to be 2.52, 2.42, and 2.32 eV, respectively, from their phosphorescent spectra at 77 K. The HOMO/LUMO levels of the carbazole copolymers can be tuned by different coupling positions and substitution at the 9-position of carbazole. P1 by connecting carbazole units via their 3 (6) positions shifts the HOMO/LUMO levels to higher energy compared to P2 via 2 (7) positions, whereas replacing alkyl groups at the 9-position of carbazole with electron-withdrawing diaryl- 1,3,4-oxadiazole group shifts the HOMO/LUMO levels to lower energy. Finally, polymer light-emitting diodes employing the P1-3 as host and bis(2,4-diphenylquinolinato-N,C(2'))iridium(acetylacelonate) (Ir(ppq)(2)(acac)) as guest were constructed and characterized electrically. |
| 语种 | 英语 |
| WOS记录号 | WOS:000261335200020 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/63893]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Yang, Chuluo |
| 作者单位 | 1.Wuhan Univ, Hubei Key Lab Organ & Polymer Optoelect Mat, Dept Chem, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Kai,Tao, Youtian,Yang, Chuluo,et al. Synthesis and Properties of Carbazole Main Chain Copolymers with Oxadiazole Pendant toward Bipolar Polymer Host: Tuning the HOMO/LUMO Level and Triplet Energy[J]. CHEMISTRY OF MATERIALS,2008,20(23):7324-7331. |
| APA | Zhang, Kai.,Tao, Youtian.,Yang, Chuluo.,You, Han.,Zou, Yang.,...&Ma, Dongge.(2008).Synthesis and Properties of Carbazole Main Chain Copolymers with Oxadiazole Pendant toward Bipolar Polymer Host: Tuning the HOMO/LUMO Level and Triplet Energy.CHEMISTRY OF MATERIALS,20(23),7324-7331. |
| MLA | Zhang, Kai,et al."Synthesis and Properties of Carbazole Main Chain Copolymers with Oxadiazole Pendant toward Bipolar Polymer Host: Tuning the HOMO/LUMO Level and Triplet Energy".CHEMISTRY OF MATERIALS 20.23(2008):7324-7331. |
入库方式： OAI收割
来源：化学研究所
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