Double-electrochromic coordination polymer network films.
Double-electrochromic coordination polymer network films.
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DOI：
10.1021/am2004976
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发表时间：
2011-06
影响因子：
9.5
通讯作者：
A. Maier;K. Cheng;Julia Savych;B. Tieke
中科院分区：
文献类型：
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作者：
A. Maier;K. Cheng;Julia Savych;B. Tieke
报道了由电致变色聚（4-（2,2′：6,2″-三吡啶基）苯基氟芴）(P-1)-锌离子配合物和电致变色阴离子组成的有组织双电致变色膜的形成和特性。阴离子为2,2′-氮基-双（3-乙基苯并噻唑-6-磺酸盐）（ABTS）和聚（（4-磺酰基）亚芴）（P-2）。利用锌离子与三吡啶（tpy）配体之间的配位相互作用，在固体载体上多次连续吸附P-1、ABTS和P-2的锌盐。ABTS和P-2离子通过静电力中和络合二价锌离子（Zn(2+)）的电荷而结合在薄膜中。描述了薄膜的光学、电化学和电致变色性能。由P-1和ABTS的Zn离子络合物组成的薄膜在中性状态下是黄色的，如果在~ 640 mV vs FOC的阳极氧化下，薄膜的颜色会变为棕灰色，最后变为蓝色。含有P-1的Zn离子配合物的膜，以P-2作为反离子，在中性状态下呈黄色，如果在~ 450 mV vs FOC下阳极氧化，则变为暗红色，最后变为蓝色。与先前报道的以非电活性六氟磷酸盐为反离子的P-1锌离子配合物的薄膜相比，新膜具有更快的响应时间和更高的对比度，并且在氧化状态下的颜色被修饰。该薄膜在环境条件下是稳定的，可以用作电致变色器件的有源层。
Formation and characteristic properties of organized double-electrochromic films consisting of electrochromic poly(4-(2,2':6,2″-terpyridyl)phenyliminofluorene) (P-1)-zinc ion complexes and electrochromic anions are reported. The anions are 2,2'-azino-bis(3-ethylbenzo-thiazoline-6-sulfonate) (ABTS) and poly((4-sulfonatophenyl)iminofluorene) (P-2). The films were prepared upon multiple sequential adsorption of P-1 and the zinc salts of ABTS and P-2 on solid supports using coordinative interactions between the Zn ions and the terpyridine (tpy) ligands. The ABTS and P-2 ions are incorporated in the films via electrostatic forces neutralizing the charge of the complexed divalent zinc (Zn(2+)) ions. The optical, electrochemical, and electrochromic properties of the films are described. Films consisting of the Zn ion complex of P-1 and ABTS are yellow in the neutral state and change their color to brownish gray and finally blue, if anodically oxidized at ∼640 mV vs FOC. Films containing the Zn ion complex of P-1, with P-2 as a counterion, are yellow in the neutral state and change color to dark red and finally blue, if anodically oxidized at ∼450 mV vs FOC. Compared with previously reported films of the Zn ion complex of P-1 with nonelectroactive hexafluorophosphate as the counterion, the new films exhibit faster response times, as well as higher contrast, and the colors in the oxidized state are modified. The films are stable under ambient conditions and might be useful as active layers in electrochromic devices.