Redox-Active Ni(II) Nodes Induced Electrochromism in a Two-Dimensional Conductive Metal–Organic Framework,ACS Applied Electronic Materials

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Redox-Active Ni(II) Nodes Induced Electrochromism in a Two-Dimensional Conductive Metal–Organic Framework
ACS Applied Electronic Materials ( IF 4.3 ) Pub Date : 2022-06-15 , DOI: 10.1021/acsaelm.2c00388
Liuyang Pan ₁ , Ran Li ₁ , Chenhong Zhang ₁ , Ziqiu Lu ₁ , Kerui Li ₁ , Qinghong Zhang ₂ , Chengyi Hou ₁ , Yaogang Li ₂ , Hongzhi Wang ₂

Affiliation

Metal–organic frameworks (MOFs) are highly desired for electrochromic (EC) applications because of their designable porous structures for fast ionic transport. However, the intrinsic low electronic conductivity of traditional MOF-based EC materials leads to a slow switching speed, poor coloration efficiency, and unfavorable cyclability. Conductive MOFs, with a tunable porous crystal structure and highly improved electronic conductivity, are proposed as promising candidates to achieve synchronous high-speed transport of electrons and ions in the EC process. Here we demonstrate fast and high-coloration-efficiency EC electrodes based on interfacially assembled conductive MOF Ni₃(HITP)₂ films. The reversible EC behavior of Ni₃(HITP)₂ is systematically explored and elaborated as the redox of Ni nodes in the crystal. Finally, we demonstrate MOFs-based devices that could potentially be used in fields such as digital displays and optical modulation.

中文翻译：

氧化还原活性 Ni(II) 节点在二维导电金属-有机框架中诱导电致变色

金属有机框架 (MOF) 非常适合电致变色 (EC) 应用，因为它们具有可设计的用于快速离子传输的多孔结构。然而，传统 MOF 基 EC 材料固有的低电子电导率导致开关速度慢、着色效率差和循环性能不佳。具有可调多孔晶体结构和高度改善的电子电导率的导电 MOF 被认为是在 EC 过程中实现电子和离子同步高速传输的有希望的候选者。在这里，我们展示了基于界面组装的导电 MOF Ni ₃ (HITP) ₂薄膜的快速且高着色效率的 EC 电极。_{Ni 3} (HITP) ₂的可逆 EC 行为被系统地探索和阐述为晶体中Ni节点的氧化还原。最后，我们展示了基于 MOF 的设备，这些设备可能用于数字显示和光学调制等领域。

更新日期：2022-06-15

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