| Conformation study of bis-dendron poly(aryl ether) dendrimers | |
| Li Ying-Ying1,2; Han Lei1,2; Chen Jin-Ping1; Li Yi1 | |
| 刊名 | Acta chimica sinica
 |
| 2008-08-14 | |
| 卷号 | 66期号:15页码:1803-1809 |
| 关键词 | Poly(aryl ether) dendrimer Conformation Intramolecular electron transfer Exciplex |
| ISSN号 | 0567-7351 |
| 通讯作者 | Li ying-ying() |
| 英文摘要 | Bis-dendron poly(aryl ether) dendrimers py-[gn](2)-nph (n= 1 similar to 2) with only one pyrene chromophore at the periphery and an anilino group at the core were synthesized and the extent of folding back conformation was given by the intramolecular electron transfer and exciplex formation. selective excitation of the periphery pyrene moiety of py-[gn](2)-nph in dichloromethane results in an electron transfer process from aniline moiety to pyrene group, and as a consequence of the electron transfer an intramolecular exciplex is formed. since the exciplex formation requires a direct orbital overlap between the donor and the acceptor groups, this gives us a directly experimental observation for the folding back conformation of bis-dend.ron poly(aryl ether) dendrimers. the efficiencies and the rate constants of electron transfer in dichloromethane are 0.87, 0.81 and 2.3 x 10(8), 1.5x 10(8) s(-1) for generations 1 similar to 2, respectively. the distances between the donor and acceptor (center to center) were estimated from the rate constants of electron transfer to be, 0.79 and 0.81 nm for genertions 1 similar to 2, respectively. this means that the periphery chromophores can fold inward and reach the core vicinity for py-[gn](2)-nph, which is similar to the mono-dendron dendrimers py-gn-nhph. |
| WOS关键词 | TRIPLET ENERGY-TRANSFER ; INTRAMOLECULAR ELECTRON-TRANSFER ; DENDRITIC MACROMOLECULES ; SOLVENT DEPENDENCE ; CONVERGENT APPROACH ; EXCIPLEX FORMATION ; CHARGE SEPARATION ; RECOMBINATION ; PHOTOISOMERIZATION ; POLYMERS |
| WOS研究方向 | Chemistry |
| WOS类目 | Chemistry, Multidisciplinary |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000258730500007 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2388914 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Li Ying-Ying |
| 作者单位 | 1.Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li Ying-Ying,Han Lei,Chen Jin-Ping,et al. Conformation study of bis-dendron poly(aryl ether) dendrimers[J]. Acta chimica sinica,2008,66(15):1803-1809. |
| APA | Li Ying-Ying,Han Lei,Chen Jin-Ping,&Li Yi.(2008).Conformation study of bis-dendron poly(aryl ether) dendrimers.Acta chimica sinica,66(15),1803-1809. |
| MLA | Li Ying-Ying,et al."Conformation study of bis-dendron poly(aryl ether) dendrimers".Acta chimica sinica 66.15(2008):1803-1809. |
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