A Dual-Function Highly Crystalline Covalent Organic Framework for HCl Sensing and Visible-Light Heterogeneous Photocatalysis,Macromolecules

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A Dual-Function Highly Crystalline Covalent Organic Framework for HCl Sensing and Visible-Light Heterogeneous Photocatalysis
Macromolecules ( IF 5.1 ) Pub Date : 2021-06-22 , DOI: 10.1021/acs.macromol.1c00574
Yogendra Nailwal ₁ , A. D. Dinga Wonanke ₂ , Matthew A. Addicoat ₂ , Santanu Kumar Pal ₁

Affiliation

Covalent organic frameworks (COFs) offer great potential for various advanced applications such as photocatalysis, sensing, and so on because of their fully conjugated, porous, and chemically stable unique structural architecture. In this work, we have designed and developed a truxene-based ultrastable COF (Tx-COF-2) by Schiff-base condensation between 1,3,5-tris(4-aminophenyl)benzene (TAPB) and 5,5,10,10,15,15-hexamethyl-10,15-dihydro-5H-diindeno(1,2-a:1′,2′-c)fluorene-2,7,12-tricarbaldehyde (Tx-CHO) for the first time. The resulting COF possesses excellent crystallinity, permanent porosity, and high Brunauer–Emmett–Teller (BET) surface areas (up to 1137 m² g^–1). The COF was found to be a heterogeneous, recyclable photocatalyst for efficient conversion of arylboronic acids to phenols under visible-light irradiation, an environmentally friendly alternative approach to conventional metal-based photocatalysis. Besides, Tx-COF-2 provides an immediate naked-eye color change (<1 s) and fluorescence “turn-on” phenomena upon exposure to HCl. The response is highly sensitive, with an ultralow detection limit of up to 4.5 nmol L^–1.

中文翻译：

用于 HCl 传感和可见光多相光催化的双功能高结晶共价有机框架

共价有机骨架 (COF) 具有完全共轭、多孔和化学稳定的独特结构，因此在光催化、传感等各种先进应用中具有巨大潜力。在这项工作中，我们通过 1,3,5-三(4-氨基苯基)苯 (TAPB) 和 5,5,10 之间的席夫碱缩合设计并开发了一种基于 truxene 的超稳定 COF ( Tx-COF-2 ) ，10,15,15六甲基10,15二氢-5- ħ -diindeno（1,2-一个：1'，2'- ç）芴2,7,12-tricarbaldehyde（TX-CHO）为第一次。所得 COF 具有优异的结晶度、永久孔隙率和高布鲁诺-埃米特-特勒 (BET) 表面积（高达 1137 m ² g ^–1）。COF 被发现是一种多相、可回收的光催化剂，可在可见光照射下将芳基硼酸有效转化为酚类，这是传统金属基光催化的一种环保替代方法。此外，Tx-COF-2在暴露于 HCl 时提供直接的肉眼颜色变化 (<1 s) 和荧光“开启”现象。响应高度灵敏，具有高达 4.5 nmol L ^–1的超低检测限。

更新日期：2021-07-13

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