Issue 38, 2012
From the journal:

Journal of Materials Chemistry

Novel triphenylamine-containing ambipolar polyimides with pendant anthraquinone moiety for polymeric memory device, electrochromic and gas separation applications†

Yi-Cheng Hu,a   Chih-Jung Chen,a   Hung-Ju Yen,a   Kun-Ying Lin,a   Jui-Ming Yeh,b   Wen-Chang Chenac  and  Guey-Sheng Liou*a  

* Corresponding authors

a Institute of Polymer Science and Engineering, National Taiwan University, 1 Roosevelt Road, 4th Sec., Taipei 10617, Taiwan
E-mail: gsliou@ntu.edu.tw

b Department of Chemistry and Center for Nanotechnology and R&D Center for Membrane Technology, Chung-Yuan Christian University, Chung Li 32023, Taiwan

c Department of Chemical Engineering, National Taiwan University, 1 Roosevelt Road, 4th Sec., Taipei 10617, Taiwan

Abstract

Novel electron-donating triphenylamine (TPA)-containing electroactive functional polyimides with electron-withdrawing pendant anthraquinone moiety were designed and prepared for memory devices, electrochromic and gas separation applications. These high-performance polymers exhibited two conductivity states and could be swept negatively with a high ON/OFF current ratio of 109. The ON state of OAQ-6FPI polyimide remained around 8 min after removing the applied voltage, while the AQ-6FPI polyimide quickly returned to the OFF state during the backward sweep in a dual sweep process, implying that devices based on OAQ-6FPI and AQ-6FPI reveal static random access memory (SRAM) and dynamic random access memory (DRAM) behaviors resulting from the isolated donor–acceptor (D–A) and non-isolated D–A structures, respectively. Meanwhile, the polymer films exhibited electrochromic characteristics with a color change from neutral colorless or pale yellowish to blue and green at applied potentials, ranging from 0.00 to 1.40 V. Furthermore, the presence of a bulky and carbonyl-containing anthraquinone unit could enhance effectively CO2 permeability coefficients (PCO2) and permeability selectivity (PCO2/PCH4) for these polyimide membranes in the range of 21.6–69.9 and 28.8–31.7, respectively, and permeability increased with higher efficiency by directly attaching the bulky group to the backbone than incorporating via a spacer.

Graphical abstract: Novel triphenylamine-containing ambipolar polyimides with pendant anthraquinone moiety for polymeric memory device, electrochromic and gas separation applications

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Article information

DOI
https://doi.org/10.1039/C2JM33266C
Article type
Paper
Submitted
22 May 2012
Accepted
10 Aug 2012
First published
13 Aug 2012

J. Mater. Chem., 2012,22, 20394-20402

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Novel triphenylamine-containing ambipolar polyimides with pendant anthraquinone moiety for polymeric memory device, electrochromic and gas separation applications

Y. Hu, C. Chen, H. Yen, K. Lin, J. Yeh, W. Chen and G. Liou, J. Mater. Chem., 2012, 22, 20394 DOI: 10.1039/C2JM33266C

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