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An In Situ Investigation into the Formation of the Solvent-Induced Crystalline Phase of Poly(9,9-Dioctylfluorene) in Solvent Vapor Annealing
Yang H(杨华); Yang, H; Qu, KX; Li, HD; Cheng, H; Zhang, JD; Cheng H(程贺)
2016
发表期刊MACROMOLECULAR CHEMISTRY AND PHYSICS
卷号217期号:14页码:1579-1585
通讯作者程贺
摘要A new metastable solvent-induced clathrate liquid crystalline phase of beta phase (named beta' here) in crystalline poly(9,9-dioctylfluorene) (PFO) thin film induced by solvent annealing is found by a combination of in situ ultraviolet and visible spectrophotometry (UV-vis), photoluminescence spectroscopy (PL), and grazing incidence wide-angle X-ray scattering (GIWAXS). The solvent annealing process consists of three processes: diffusion of solvent molecules into the film; saturation of solvent in the film; and drying of the film under nitrogen. The formation of beta' phase with ordered packing of side chains and disordered packing of backbones occurs during the diffusion process of solvent molecules into the film. When the solvent molecules penetrate the film, the disordered side chains start to align themselves to form an ordered structure, and the ordering would gradually in the saturation-process. Furthermore, the ordering of side chains drives an ordered rearrangement of the backbones during the drying process; however, the crystallinity of the side chains decreases with the orderly rearrangement of backbones due to the helical conformation of PFO.
文章类型Article
关键词polyfluorene solvent annealing in-situ investigation liquid crystalline molecular packing
学科领域Polymer Science
DOI10.1002/macp.201600012
关键词[WOS]POLYOCTYLFLUORENE THIN-FILM ; LIGHT-EMITTING DIODE ; BETA-PHASE ; CONJUGATED POLYMERS ; ENERGY-TRANSFER ; MORPHOLOGY ; POLYFLUORENES ; ENHANCEMENT ; EMISSION ; POLY(9,9-DI-N-OCTYL-2,7-FLUORENE)
收录类别SCI ; EI
语种英语
WOS类目Polymer Science
WOS记录号WOS:000382963600004
引用统计
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260193
专题东莞分部
实验物理中心
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714
Yang H,Yang, H,Qu, KX,et al. An In Situ Investigation into the Formation of the Solvent-Induced Crystalline Phase of Poly(9,9-Dioctylfluorene) in Solvent Vapor Annealing[J]. MACROMOLECULAR CHEMISTRY AND PHYSICS,2016,217(14):1579-1585.
APA 杨华.,Yang, H.,Qu, KX.,Li, HD.,Cheng, H.,...&程贺.(2016).An In Situ Investigation into the Formation of the Solvent-Induced Crystalline Phase of Poly(9,9-Dioctylfluorene) in Solvent Vapor Annealing.MACROMOLECULAR CHEMISTRY AND PHYSICS,217(14),1579-1585.
MLA 杨华,et al."An In Situ Investigation into the Formation of the Solvent-Induced Crystalline Phase of Poly(9,9-Dioctylfluorene) in Solvent Vapor Annealing".MACROMOLECULAR CHEMISTRY AND PHYSICS 217.14(2016):1579-1585.
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