Intrinsic proton conduction in 2D sulfonated covalent organic frameworks through a post-synthetic strategy
Intrinsic proton conduction in 2D sulfonated covalent organic frameworks through a post-synthetic strategy
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通过后合成策略在二维磺化共价有机框架中进行本征质子传导
DOI：
10.1039/d1ce00957e
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发表时间：
2021
期刊：
影响因子：
3.1
通讯作者：
Nagao Yuki
中科院分区：
文献类型：
--
作者：
Zhang Yuwei;Li Chunzhi;Liu Zhaohan;Yao Yuze;Hasan Md. Mahmudul;Liu Qianyu;Wan Jieqiong;Li Zhongping;Li He;Nagao Yuki
二维共价有机骨架（2DCOFs）由于具有规则的孔道结构和易于功能化，在质子传导领域受到广泛关注。然而，大多数COF需要负载质子载体以实现高质子传导性。在这里，我们报告了通过简单的合成后修饰策略将柔性磺酸基团固定在PyTTA-DHTA-COF（通过4，4 ′，4 ′′，4 ′-（芘-1，3，6，8-四基）四苯胺和2，5-二羟基苯甲醛缩合而合成）的通道壁上。磺化COF在25 °C和100%相对湿度（RH）下表现出高达10−3的固有质子电导率，在70 °C和100%RH下表现出高达10−2 S cm−1的高电导率，而无需引入任何非共价酸分子或咪唑衍生物。
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.