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The effect of the donor unit on the optical properties of polymers

机译：供体单元对聚合物光学性能的影响

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摘要

A series of donor-acceptor-donor (DAD) type Jt-conjugated monomers containing 10,1 l,12,13-tetrahydrodibenzo(a,c]phenazine moiety in the backbone as the acceptor unit and thiophene derivatives as the donor unit were prepared by Stille coupling. Thiophene, 3-hexyI thiophene and 3,4-ethylenedioxythiophene were used as the donor units to understand the effects of donor unit on electrochemical and optoelectronic properties of the resulting polymers. Electroactivity of monomers and redox behavior of their polymers were investigated by cyclic voltammetry. The presence of the strong electron-donating ethylenedioxy groups on the aromatic structure increased electron density on 2,7-bis (2,3-dihydrothieno[3,4-b][l,4]dioxin-5-yl)-l0,11,12,13-tetrahydrodibenzo[a,c]phenazine (DTBP), thus the oxidation potential of DTBP shifts to a lower value than that of 2,7-bis (4-hexylthiophen-2-yl)-10,11,12,13-tetrahydrodibenzo(a,c] phenazine (HTBP) and 2,7-di (thiophen-2-yl)-10,11,12,13-tetrahydrodibenzo[a,c]phenazine (TTBP). The electronic band gaps, defined as the onset of the n-n* transition, were found to be 2.5 eV for HTBP, 2.0 eV for DTBP and 2.2 eV for TTBP. Both of PDTBP and PTTBP films showed multi-color electro-chromism and also fast switching times (<1 s) in the visible and NIR regions.
机译：制备了一系列主链上含有10,1,12,13-四氢二苯并（a，c]吩嗪部分作为供体单元和噻吩衍生物作为供体单元的DAD型Jt共轭单体通过噻吩偶联，将噻吩，3-己基噻吩和3,4-乙撑二氧噻吩用作供体单元，以了解供体单元对所得聚合物的电化学和光电性能的影响，研究了单体的电活性及其聚合物的氧化还原行为通过循环伏安法在芳族结构上存在强供电子乙二氧基增加了2,7-双（2,3-二氢噻吩并[3,4-b] [1,4]二恶英-5-基上的电子密度）-l0,11,12,13-四氢二苯并[a，c]吩嗪（DTBP），因此DTBP的氧化电位移至比2,7-双（4-己基噻吩-2-基）-低的值10,11,12,13-四氢二苯并[a，c]吩嗪（HTBP）和2,7-二（噻吩-2-基）-10,11,12,13-四氢二苯并[a，c] p henazine（TTBP）。发现电子带隙（定义为n-n *跃迁的起点）对于HTBP为2.5 eV，对于DTBP为2.0 eV，对于TTBP为2.2 eV。 PDTBP和PTTBP薄膜均显示多色电致变色现象，并且在可见光和NIR区域均显示出快速切换时间（<1 s）。

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  • 来源
    《Organic Electronics》 |2011年第10期|p.1625-1631|共7页
  • 作者

    Elif Kose Unver; Simge Tarkuc; Yasemin Arslan Udum; Cihangir Tanyeli; Levent Toppare;

  • 作者单位

    Department of Chemistry, Middle East Technical University. 06531 Ankara, Turkey;

    Department of Chemistry, Middle East Technical University. 06531 Ankara, Turkey,Opto-Electronic Materials, DelftChemTech, Delft University of Technology, Julianalaan 136, 2628 BL Delft. The Netherlands;

    Institute of Science and Technology, Department of Advanced Technologies, Cazi University, 06570 Ankara, Turkey;

    Department of Chemistry, Middle East Technical University. 06531 Ankara, Turkey;

    Department of Chemistry, Middle East Technical University. 06531 Ankara, Turkey,Department of Biotechnology, Middle East Technical University, 06531 Ankara, Turkey,Department of Polymer Science and Technology, Middle East Technical University, 06531 Ankara, Turkey;

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  • 正文语种 eng
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  • 关键词

    electrochemical polymerization; multichromism; optical properties;

    机译：电化学聚合;多色性;光学性质;

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