Intrinsic proton conduction in 2D sulfonated covalent organic frameworks through a post-synthetic strategy,CrystEngComm

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Intrinsic proton conduction in 2D sulfonated covalent organic frameworks through a post-synthetic strategy
CrystEngComm ( IF 2.6 ) Pub Date : 2021-08-13 , DOI: 10.1039/d1ce00957e
Yuwei Zhang ₁ , Chunzhi Li ₂ , Zhaohan Liu ₃ , Yuze Yao ₃ , Md. Mahmudul Hasan ₃ , Qianyu Liu ₁ , Jieqiong Wan ₄ , Zhongping Li ₃ , He Li ₂ , Yuki Nagao ₃

Affiliation

Two-dimensional covalent organic frameworks (2D COFs) have attracted much attention in proton conduction, owing to their regular pore channels and easy functionalization. However, most of the COFs required loading of proton carriers to achieve high proton conductivity. Here, we report the immobilization of flexible sulfonic acid groups on the channel walls of PyTTA–DHTA-COF (synthesized by condensation of 4,4′,4′′,4′′′-(pyrene-1,3,6,8-tetrayl)tetraaniline and 2,5-dihydroxyterephthalaldehyde) via a simple post-synthetic modification strategy. The sulfonated COF showed intrinsic proton conductivity up to 10⁻³ at 25 °C and 100% relative humidity (RH) and high conductivity up to 10⁻² S cm⁻¹ at 70 °C and 100% RH without the introduction of any non-covalent acid molecules or imidazole derivatives.

中文翻译：

通过后合成策略在二维磺化共价有机框架中进行内在质子传导

二维共价有机骨架（2D COFs）由于其规则的孔道和容易的功能化而在质子传导方面引起了广泛关注。然而，大多数 COF 需要加载质子载体才能实现高质子电导率。在这里，我们报告了柔性磺酸基团在 PyTTA-DHTA-COF（由 4,4',4'',4'''-(pyrene-1,3,6,8 -四基）四苯胺和 2,5-二羟基对苯二醛）通过简单的合成后修饰策略。磺化 COF在 25°C 和 100% 相对湿度 (RH) 下显示出高达 10 ^{-3 的}本征质子电导率和高达 10 ^-2 S cm ^{-1 的}高电导率在 70 °C 和 100% RH 下，不引入任何非共价酸分子或咪唑衍生物。

更新日期：2021-09-09

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