Photophysics of MEH-PPV/OMMT nanocomposites
文献类型：期刊论文
| 作者 | Jing Chaojun; Chen Liusheng; Shi Yi; Jin Xigao |
| 刊名 | ACTA POLYMERICA SINICA
 |
| 出版日期 | 2007-04-01 |
| 期号 | 4页码:374-382 |
| 关键词 | Meh-ppv Clay Nanocomposite Aggregation Photophysics |
| ISSN号 | 1000-3304 |
| 英文摘要 | The photoluminescence behaviors of poly (2-methyoxy-5-(2'-ethylhexyloxy)-1, 4-phenylenevinylene) (MEH-PPV)/organoclay (OMMT) nanocompsites in both solvent and solid were investigated in this paper. The results demonstrated that nano-layered silicates may enhance the luminescent performance of MEH-PPV primarily based on structural and conformational modulation. The appearance of OMMT could induce more J aggregates other than H aggregates of MEH-PPV, which result in a red-shift of the emission and higher electroluminescence efficiency. To understand the mechanism of the luminescent enhancement for the nanocomposites, the measurements of steady fluorescence emission, fluorescence lifetime (tau) and spin-lattice relaxation time (t(1)) of the individual carbon atoms in MEH-PPV for the nanocomposite films were carried out. It is obviously that with increasing OMMT content in the nanocomposites, the Stokes shift together with the fluorescence lifetime showed a prolonging tendency, and the t, of the conjugated carbon atoms in MEH-PPV backbone shortened linearly. All of the results indicated that, with the increase of OMMT content, the interchain interaction and pi-pi* transition decreased, the proportion of J-aggregation and the mobility of the conjugated segments increased. Consequentially, both the self-aggregation of the polymer chains and the self-quenching of luminescent emission reduced. |
| 语种 | 英语 |
| WOS记录号 | WOS:000246040800013 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/60547]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Jing Chaojun |
| 作者单位 | Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jing Chaojun,Chen Liusheng,Shi Yi,et al. Photophysics of MEH-PPV/OMMT nanocomposites[J]. ACTA POLYMERICA SINICA,2007(4):374-382. |
| APA | Jing Chaojun,Chen Liusheng,Shi Yi,&Jin Xigao.(2007).Photophysics of MEH-PPV/OMMT nanocomposites.ACTA POLYMERICA SINICA(4),374-382. |
| MLA | Jing Chaojun,et al."Photophysics of MEH-PPV/OMMT nanocomposites".ACTA POLYMERICA SINICA .4(2007):374-382. |
入库方式： OAI收割
来源：化学研究所
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