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

doi:10.1039/c3cp53538j

CORC > 化学研究所 > 中国科学院化学研究所

	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
	Wang, Haiyang 1,2; Liu, Jiangang 1,2; Xu, Yaozhuo 1,2; Yu, Xinhong 1,2; Xing, Rubo 1,2; Han, Yanchun 1,2
刊名	PHYSICAL CHEMISTRY CHEMICAL PHYSICS
	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
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000328884900018
内容类型	期刊论文
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.