Crystal Structure and Molecular Packing Behavior of   Poly(2,3-diphenyl-1,4-phenylenevinylene) Derivatives Containing Alkyl   Side-Chains

doi:10.1021/ma302082x

CORC > 北京大学 > 化学与分子工程学院

	Crystal Structure and Molecular Packing Behavior of Poly(2,3-diphenyl-1,4-phenylenevinylene) Derivatives Containing Alkyl Side-Chains
	Ren, Xiang-Kui ; Wu, Yu-Chun ; Wang, Shao-Jie ; Jiang, Shi-Dong ; Zheng, Jun-Feng ; Yang, Shuang ; Chen, Er-Qiang ; Wang, Chien-Lung ; Hsu, Chain-Shu
刊名	macromolecules
	2013
关键词	POLY(P-PHENYLENE VINYLENE) DERIVATIVES LIGHT-EMITTING-DIODES CONJUGATED POLYMERS POLARIZED ELECTROLUMINESCENCE TRANSITION BEHAVIORS PHASE-BEHAVIOR THIN-FILMS DEH-PPV LUMINESCENCE AGGREGATION
DOI	10.1021/ma302082x
英文摘要	Phase behavior and crystal structure of a series of poly(2,3-diphenyl-5-alkyl-p-phenylenevinylene) (denoted as DPn-PPV, where n represents the carbon number of the alkyl side-chain, n = 6, 8, 10, 12) were studied using differential scanning calorimetry, one- and two-dimensional (1D and 2D) wide-angle X-ray diffraction (WAXD), and selected area electron diffraction (SAED). The experimental results reveal that DPn-PPV exhibits one crystalline phase at low temperatures. On the basis of 2D WAXD and SAED patterns obtained from the oriented samples, the crystal structures are determined to be orthorhombic for DP6-PPV and monoclinic for DP8-PPV, DP10-PPV, and DP12-PPV. To account for the unusually large unit cell dimensions, we propose that the unit cell of DPn-PPV contains 4 chains (8 chemical repeat units). The complex crystal structure can be attributed to the longitudinal and transverse offsets between the neighboring chains, which shall be mainly due to the requirement of minimizing the steric hindrance caused by the attached pendent groups and maximizing the pi-pi interaction between the chains. The molecular packing scheme was simulated by using Cerius(2) software, of which the result agrees with the experimental data. The polarized UV-vis absorption and polarized solid-state photoluminescence (PL) property of these polymers was also investigated. The PL spectra indicated that the light emitted from the oriented film was preferentially polarized parallel to the shear direction, implying that DPn-PPV may potentially be useful in linearly polarized luminescence devices.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000313303600019&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Polymer Science; SCI(E); EI; 9; ARTICLE; 1; 155-163; 46
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/227346]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Ren, Xiang-Kui,Wu, Yu-Chun,Wang, Shao-Jie,et al. Crystal Structure and Molecular Packing Behavior of Poly(2,3-diphenyl-1,4-phenylenevinylene) Derivatives Containing Alkyl Side-Chains[J]. macromolecules,2013.
APA	Ren, Xiang-Kui.,Wu, Yu-Chun.,Wang, Shao-Jie.,Jiang, Shi-Dong.,Zheng, Jun-Feng.,...&Hsu, Chain-Shu.(2013).Crystal Structure and Molecular Packing Behavior of Poly(2,3-diphenyl-1,4-phenylenevinylene) Derivatives Containing Alkyl Side-Chains.macromolecules.
MLA	Ren, Xiang-Kui,et al."Crystal Structure and Molecular Packing Behavior of Poly(2,3-diphenyl-1,4-phenylenevinylene) Derivatives Containing Alkyl Side-Chains".macromolecules (2013).