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首页> 外文期刊>Advanced Functional Materials >Obtaining Reversible, High Contrast Electrochromism, Electrofluorochromism, and Photochromism in an Aqueous Hydrogel Device Using Chromogenic Thiazolothiazoles
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Obtaining Reversible, High Contrast Electrochromism, Electrofluorochromism, and Photochromism in an Aqueous Hydrogel Device Using Chromogenic Thiazolothiazoles

机译：使用发色噻唑噻唑（水凝胶水凝胶装置中）在水性水凝胶装置中获得可逆的，高对比度电致变色，电流和光致变量

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摘要

There have been an increasing number of materials developed that show multifunctional chromogenic properties (such as electrochromism, electrofluorochromism, or photochromism), but to date, few materials have shown all three properties. Materials that are electrochemically and optically active are attractive for a diverse set of applications that include smart-windows, lighting, sensing, energy production, and conservation. This is especially attractive for building developers interested in adaptive or environmentally responsive facades. Achieving systems made from cost-effective, readily synthesized materials will make them easy to utilize in a variety of fields. Low-cost devices are developed using water-soluble, chromogenic thiazolo(5,4-d)thiazole (TTz) dyes that show high device performance in three areas: electrochromism, electrofluorochromism, and photochromism and are all contained within a highly fluorescent aqueous polyvinyl alcohol/borax hydrogel device. The dyes incorporate a rigid, heterocyclic TTz structure that enables the development of devices with excellent reversibility and stable cycling for 250 cycles. The TTz hydrogel-containing devices also exhibit photochromism under illumination, which can be electrochemically cycled back to the colorless state. In addition, coupling photochromism with electrochromism lowers the power necessary for a comparable electrochromic color change. Last, the hydrogel-containing devices also show electrofluorochromism, where fluorescence can be turned off by 90%.
机译：已经越来越多的材料开发，显示多功能发色特性（例如电致变量，电荧光或光致变色），但到目前为止，很少有材料显示所有三种性质。电化学和光学活跃的材料对于包括智能窗口，照明，传感，能源生产和保护的多种应用是具有吸引力的。这对于建立对自适应或环境响应性外墙感兴趣的开发人员来说特别有吸引力。实现由成本效益的易合成材料制成的系统将使它们易于利用各种领域。使用水溶性的发色噻唑（5,4-D）噻唑（TTZ）染料，在三个方面显示出高器件性能的低成本装置：电致变量，电流荧光和光学变调程，并且含有高度荧光水性聚乙烯基醇/硼砂水凝胶装置。染料掺入刚性的杂环TTZ结构，使得能够开发具有优异的可逆性和稳定循环的装置，持续250个循环。含TTZ水凝胶的装置也在照明下表现出光学变色，这可以电化学循环回到无色状态。此外，具有电致变色的耦合光学变频降低了可比电致变色变化所需的功率。最后，含水凝胶的装置还显示出电流荧光变性，其中荧光可以通过＆gt关闭。 90％。

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