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首页> 外文期刊>ACS applied materials & interfaces >Black-to-Transmissive Electrochromism with Visible-to-Near-Infrared Switching of a Co(II)-Based Metallo-Supramolecular Polymer for Smart Window and Digital Signage Applications
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Black-to-Transmissive Electrochromism with Visible-to-Near-Infrared Switching of a Co(II)-Based Metallo-Supramolecular Polymer for Smart Window and Digital Signage Applications

机译：基于Co（II）的金属-超分子聚合物在智能窗和数字标牌应用中的可见光至近红外转换的黑色至透射电致变色

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摘要

Black-to-transmissive electrochromism has been obtained with a Co(II)-based metallo-supramolecular polymer (polyCo). Thin films of polyCo, based on bisterpyridine ligand assembled with Co(II) metal ion, were constructed by spray casting the polymer onto ITO glass. With such simple fabricating means to form good-quality films, polyCo films show stable switching at the central metal ion of the Co(II)/Co(I) redox reaction when immersed in aqueous solution. With an increase in the pH of the aqueous electrolyte solution from neutral, the film exhibits a color response due to the interaction between the d-orbital electron and hydroxide ions affecting the d-d* transition. As a result, a nearly transparent-to-black electrochromic performance can be achieved with a transmittance difference at 550 nm of 74.3% (81.9-7.6%) in pH 13 solution. The light absorption of the film can be tuned over light regions from visible to near-infrared with a large attenuation.
机译：使用基于Co（II）的金属超分子聚合物（polyCo）获得了黑色至透射电致变色。通过将聚合物喷涂到ITO玻璃上，构建基于与二价吡啶配体结合的Co（II）金属离子的polyCo薄膜。通过这种简单的制造方法来形成高质量的薄膜，当浸入水溶液中时，聚钴薄膜在Co（II）/ Co（I）氧化还原反应的中心金属离子处显示出稳定的转换。随着电解质水溶液的pH从中性增加，由于d轨道电子与影响d-d *转变的氢氧离子之间的相互作用，膜表现出颜色响应。结果，在pH 13溶液中在550 nm处的透射率差为74.3％（81.9-7.6％）时，可以实现几乎透明的黑色电致变色性能。薄膜的光吸收可以在可见光到近红外的光区域内以较大的衰减进行调整。

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