Extended-chain lamellar crystals of monodisperse polyfluorenes

doi:10.1016/j.polymer.2013.02.040

CORC > 化学研究所 > 中国科学院化学研究所

	Extended-chain lamellar crystals of monodisperse polyfluorenes
	Liu, Chengfang 1,2; Wang, Qilin 1,2; Tian, Hongkun 1; Geng, Yanhou 1; Yan, Donghang 1
刊名	POLYMER
	2013-04-19
卷号	54 期号:9 页码:2459-2465
关键词	Single Crystals Polyfluorenes Extended-chain
ISSN号	0032-3861
DOI	10.1016/j.polymer.2013.02.040
英文摘要	Polymer single crystals of monodisperse poly (9,9-dioctylfluorene)s (PFOs) with actual molecular weights of 6220, 12,437 and 24,874 Da corresponding to the numbers of fluorene repeating units of 16, 32 and 64, respectively, were grown from chloroform/ethanol solutions. In the single crystals, polymer chains adopt lamellar packing motif. The crystal structure determined by electron diffraction is identical for all three PFOs, and the single crystal has an orthorhombic unit cell with lattice parameters of a = 2.16 nm, b = 1.28 nm, and c = 336 nm. In these lamellar crystals, PFO backbones are arranged perpendicular to the lamellar surface and alkyl side chains are along the crystal-growth direction. The lamellar thickness is identical to the extended chain length of the corresponding polymer as demonstrated by atomic force microscopy (AFM) measurements. It is noteworthy to point out that F64 still maintain extended-chain packing habit even when the chain length is as long as 53 nm. Therefore, our results demonstrated that chains remain extended in this system. (C) 2013 Elsevier Ltd. All rights reserved.
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000317632900032
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/46311]
专题	中国科学院化学研究所
通讯作者	Yan, Donghang
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	Liu, Chengfang,Wang, Qilin,Tian, Hongkun,et al. Extended-chain lamellar crystals of monodisperse polyfluorenes[J]. POLYMER,2013,54(9):2459-2465.
APA	Liu, Chengfang,Wang, Qilin,Tian, Hongkun,Geng, Yanhou,&Yan, Donghang.(2013).Extended-chain lamellar crystals of monodisperse polyfluorenes.POLYMER,54(9),2459-2465.
MLA	Liu, Chengfang,et al."Extended-chain lamellar crystals of monodisperse polyfluorenes".POLYMER 54.9(2013):2459-2465.