Synthesis and characterization of monodisperse oligo(fluorene-co-bithiophene)s
文献类型：期刊论文
| 作者 | Zhang, Xiaojie; Qu, Yao; Bu, Laju; Tian, Hongkun; Zhang, Jingping; Wang, Lixiang; Geng, Yanhou; Wang, Fosong |
| 刊名 | CHEMISTRY-A EUROPEAN JOURNAL
 |
| 出版日期 | 2007 |
| 卷号 | 13期号:21页码:6238-6248 |
| 关键词 | Conjugation Cross-coupling Liquid Crystals Oligomers |
| ISSN号 | 0947-6539 |
| DOI | 10.1002/chem.200700007 |
| 英文摘要 | A series of monodisperse oligo(9,9-di-n-octylfluorene-co-bithiophene)s (OFbTs) with molecular lengths of up to 19.5 nm and molecular weights up to 7025 g mol(-1) has been synthesized by a divergent/convergent approach involving Stille coupling reactions. Stille coupling is quite efficient in preparing this class of oligomers, and even the molecule with nine fluorene units and eight bithiophene units (F9Th16) can be synthesized in a yield as high as 70%. Because of easy functionalization of the thiophene ring at its alpha position, no additional protecting group allowing activation for further reaction is necessary. However, the synthetic routes must be optimized to eliminate contamination of the targeting compounds with the homocoupling product of the organotin reagents. Synthesis of the longest oligomer F13Th24 in a relative large quantity is limited by its low yield due to the pronounced ligand-exchange side reactions of the starting materials and reaction intermediates. All oligomers longer than F4Th6 are nematic mesomorphs and exhibit enhanced glass transition temperature and clearing point with increasing molecular length, as revealed by differential scanning calorimetry and polarizing optical microscopy. Absorption and photoluminescence (PL) measurements reveal that OFbTs are well-conjugated systems with an effective conjugation length longer than the length of F13Th24. |
| 语种 | 英语 |
| WOS记录号 | WOS:000248250300025 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/62833]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Geng, Yanhou |
| 作者单位 | 1.Chinese Acad Sci, Grad Sch, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.NE Normal Univ, Fac Chem, Changchun 130024, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Xiaojie,Qu, Yao,Bu, Laju,et al. Synthesis and characterization of monodisperse oligo(fluorene-co-bithiophene)s[J]. CHEMISTRY-A EUROPEAN JOURNAL,2007,13(21):6238-6248. |
| APA | Zhang, Xiaojie.,Qu, Yao.,Bu, Laju.,Tian, Hongkun.,Zhang, Jingping.,...&Wang, Fosong.(2007).Synthesis and characterization of monodisperse oligo(fluorene-co-bithiophene)s.CHEMISTRY-A EUROPEAN JOURNAL,13(21),6238-6248. |
| MLA | Zhang, Xiaojie,et al."Synthesis and characterization of monodisperse oligo(fluorene-co-bithiophene)s".CHEMISTRY-A EUROPEAN JOURNAL 13.21(2007):6238-6248. |
入库方式： OAI收割
来源：化学研究所
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