Ultrasensitive, high selective and rapid monitoring of explosives has increasingly become a crucial and urgent challenge in order to protect environment and prevent terrorist threats, which should be addressed timely. In this study, a highly selective and sensitive electrochemical sensing platform based on two dimensional (2D) heterogeneous functionalized material for determination dangerous and explosive sodium picrate (SP) and analogue picric acid (PA) is successfully established. To begin with, the dihydroxylatopillar [6]arene (2HP6) modified Au nanoparticles ([email protected]) can be easily obtained by 2HP6 reduced and stabilized Au nanoparticles at room temperature. Then, assembly of [email protected] on the surface of cationic pillar [6]arene (CP6) functionalized covalent organic framework (COF) can obtain 2D heterogeneous composite ([email protected]@[email protected]) for rapid and sensitive detection of SP. The electrode, best operated at a working potential of −0.4 to −1.1 V (vs. Hg/Hg₂Cl₂), works in the concentration range of 0.005–120 μM SP and has a 0.0017 μM detection limit. The Au nanoparticles play an electrocatalytic role in sensing SP, the 2HP6 and CP6 serve as a prominent material for gathering and recognition SP onto the surface of electrode, respectively. The SP can thread into the cavity of pillar [6]arene and form a 1:1 [2]pseudorotaxanetype complex. The SP can be highly captured by CP6 via the excellent supramolecular host-guest interactions (including π interaction, hydrophobic interactions and electrostatic interactions). Consequently, this work might present a green strategy for preparation 2D heterogeneous functionalized hybrid material in catalysis, sensing and other fields.

为了保护环境和防止恐怖主义威胁，对炸药的超灵敏，高选择性和快速监测已日益成为一项紧迫而紧迫的挑战，应及时加以解决。在这项研究中，成功​​建立了基于二维（2D）异质功能化材料的高选择性和灵敏的电化学传感平台，用于测定危险和易爆的苦味酸钠（SP）和类似苦味酸（PA）。首先，在室温下通过2HP6还原和稳定化的Au纳米颗粒可以轻松获得二羟基吡咯烷酮[6]芳烃（2HP6）修饰的Au纳米颗粒（[受电子邮件保护]）。然后，在阳离子柱[6]芳烃（CP6）官能化的共价有机骨架（COF）表面上组装[受电子邮件保护]可以获得二维异质复合物（[受电子邮件保护] @ [受电子邮件保护]），用于快速，灵敏地检测SP。电极最好在-0.4至-1.1 V（vs.Hg / Hg₂ Cl ₂），在0.005–120μMSP的浓度范围内工作，检测极限为0.0017μM。金纳米粒子在感应SP中起电催化作用，2HP6和CP6分别是将SP收集和识别到电极表面上的重要材料。SP可以穿入柱[6]芳烃的腔中并形成1：1 [2]假轮烷型配合物。CP6可以通过出色的超分子主客体相互作用（包括π相互作用，疏水相互作用和静电相互作用）被SP6高度捕获。因此，这项工作可能为在催化，传感和其他领域制备二维异质功能化杂化材料提供一种绿色策略。