Ordered fibrillar morphology of donor-acceptor conjugated copolymers at multiple scales via blending with flexible polymers and solvent vapor annealing: insight into photophysics and mechanism
文献类型：期刊论文
| 作者 | Wang, Haiyang1,2; Liu, Jiangang1,2; Xu, Yaozhuo1,2; Yu, Xinhong1,2; Xing, Rubo1,2; Han, Yanchun1,2 |
| 刊名 | PHYSICAL CHEMISTRY CHEMICAL PHYSICS
 |
| 出版日期 | 2014 |
| 卷号 | 16期号:4页码:1441-1450 |
| ISSN号 | 1463-9076 |
| DOI | 10.1039/c3cp53538j |
| 英文摘要 | The ordered, aligned fibrillar morphology at multiple scales of a donor-acceptor (D-A) conjugated copolymer of 3,6-bis-(thiophen-2-yl)-N,N'-bis(2-octyl-1-dodecyl)-1,4-dioxo-pyrrolo[3,4-c]pyrrole and thieno[3,2-b]thiophene (PDBT-TT) was prepared via blending with flexible polymers (PS13.7k, PDBT-TT/PS = 1/10 w/w) followed by chloroform (CF) solvent vapor annealing (SVA) for 24 h. The aligned fibrillar bundles were of about 500 nm width, consisting of parallel aligned nanofibrils of ab. 10 nm width. It was found that the direction of backbones in nanofibrils was parallel to the long axis of nanofibrils, which implied an intense intra-chain conjugation associated with extended backbones and J-aggregation of PDBT-TT. This ordered morphology corresponded to the characteristic photophysical features of (i) red-shifted absorption arising from J-aggregation, (ii) larger Davydov splitting, (iii) the prevailing absorbance of J-aggregation over H-aggregation in its UV-Vis spectrum and (iv) more red-shifted max photoluminescence emission, compared with the films prepared via the other methods. By investigating the Raman spectra and XRD profiles, it is proposed that the origin of the best morphological and photophysical order is the combination of blending and SVA. The limited and "flexible'' space formed due to phase separation between PDBT-TT and PS facilitated the motion of rigid PDBT-TT chains and promoted their stacking order as templates, and CF vapor assisted the conformational transition of chains to more "coil-like'' to help them reorganize in a thermodynamic stable way. |
| 语种 | 英语 |
| WOS记录号 | WOS:000328884900018 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/52821]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Han, Yanchun |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Haiyang,Liu, Jiangang,Xu, Yaozhuo,et al. Ordered fibrillar morphology of donor-acceptor conjugated copolymers at multiple scales via blending with flexible polymers and solvent vapor annealing: insight into photophysics and mechanism[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2014,16(4):1441-1450. |
| APA | Wang, Haiyang,Liu, Jiangang,Xu, Yaozhuo,Yu, Xinhong,Xing, Rubo,&Han, Yanchun.(2014).Ordered fibrillar morphology of donor-acceptor conjugated copolymers at multiple scales via blending with flexible polymers and solvent vapor annealing: insight into photophysics and mechanism.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,16(4),1441-1450. |
| MLA | Wang, Haiyang,et al."Ordered fibrillar morphology of donor-acceptor conjugated copolymers at multiple scales via blending with flexible polymers and solvent vapor annealing: insight into photophysics and mechanism".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 16.4(2014):1441-1450. |
入库方式： OAI收割
来源：化学研究所
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