Near-infrared and multicolored electrochromism of solution processable   triphenylamine-anthraquinone imide hybrid systems

doi:10.1016/j.electacta.2013.03.067

CORC > 北京大学 > 化学与分子工程学院

	Near-infrared and multicolored electrochromism of solution processable triphenylamine-anthraquinone imide hybrid systems
	Chen, Fengkun ; Fu, Xiangyu ; Zhang, Jie ; Wan, Xinhua
刊名	电化学学报
	2013
关键词	Anthraquinone imide Triphenylamine Near-infrared Multicolor electrochromism Theoretical calculation HETEROJUNCTION SOLAR-CELLS AROMATIC POLYAMIDES OPTICAL ATTENUATION MOLECULAR MATERIALS CONJUGATED POLYMER ANION-RADICALS DEVICES DONOR DESIGN MOIETIES
DOI	10.1016/j.electacta.2013.03.067
英文摘要	A series of novel donor-acceptor molecules (TPA-AQI, TPA-AQI2 and TPA-AQI3) with various number of electron-accepting anthraquinone imide (AQI) arms connected to the electron-donating triphenylamine (TPA) core were synthesized and characterized by UV-vis absorption spectroscopy, cyclic voltammetry and spectroelectrochemical measurements. The geometries of these molecules in ground-state as well as the electronic absorption properties on the basis of the optimized geometries were investigated by theoretical calculations. For all the three molecules, there are two main absorptions in the range of 300-450 nm and 450-700 nm, respectively. The former corresponds to pi-pi transitions and the latter a nature of intramolecular charge transfer (IC!'). Hypsochromic shift of the IC!' absorption was observed from the single armed molecule TPA-AQI to the tribranched molecule TPA-AQI3, which may result from the increased steric hindrance between the donor and acceptor segments. Electrochemical studies revealed the ambipolar properties of these molecules and three redox couples, with two quasi-reversible redox couples appearing in the cathodic regime and one redox couple in the anodic regime, on CV curves. CV results also indicated the stabilization of the HOMO levels by increasing AQI arms. Spectroelectrochemical measurements demonstrated the near-infrared (NIR) and multicolor electrochromism of these molecules. When reduced to radical anions or oxidized to radical cations, intense NIR absorptions were observed accompanied with color changes of the solutions. As for TPA-AQI, there existed four different colors at different redox states: Indian-red at the neutral state, bluish green at the radical cationic state, olive green at the radical anionic state, and dark blue at the dianion state. The detailed transitions of the observed NIR absorptions were also discussed. (C) 2013 Elsevier Ltd. All rights reserved.; Electrochemistry; SCI(E); EI; 11; ARTICLE; 211-218; 99
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/150751]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Chen, Fengkun,Fu, Xiangyu,Zhang, Jie,et al. Near-infrared and multicolored electrochromism of solution processable triphenylamine-anthraquinone imide hybrid systems[J]. 电化学学报,2013.
APA	Chen, Fengkun,Fu, Xiangyu,Zhang, Jie,&Wan, Xinhua.(2013).Near-infrared and multicolored electrochromism of solution processable triphenylamine-anthraquinone imide hybrid systems.电化学学报.
MLA	Chen, Fengkun,et al."Near-infrared and multicolored electrochromism of solution processable triphenylamine-anthraquinone imide hybrid systems".电化学学报 (2013).