Ionic Covalent Organosilicon Polymer Nanosheet for Selective and Sensitive Detection of Dopamine
Ionic Covalent Organosilicon Polymer Nanosheet for Selective and Sensitive Detection of Dopamine
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DOI：
10.1021/acsmaterialslett.3c00082
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发表时间：
2023-04-07
影响因子：
11.4
通讯作者：
Li，Sheng-Hua
中科院分区：
文献类型：
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作者：
Chai，Rui-Lin;Zhang，Xiao-Kang;Li，Sheng-Hua
共价有机聚合物（COP）纳米片是一种独特的材料，在能量储存和转换、化学传感、气体储存等方面有着广泛的应用。开发一种有效的方法来从设计的单体制备COP纳米片，特别是自剥离的COP，仍然具有挑战性。在此，我们提出了一种新的策略，通过可逆缩合六羟基苯并菲（HHTP）与苯基三甲氧基硅烷制备自剥离COP。所制备的COP具有五配位的硅中心和带负电荷的表面，使得其容易剥离成厚度为1.07 nm的纳米片。此外，该COP可作为多巴胺（DA）的高选择性电化学传感器，其检测限为52 nM（S/N = 3），检测范围为0.1-120 μM。本研究为离子型COP纳米片的设计提供了一种新的策略，拓展了离子型COP在电化学传感中的应用。
Covalent organic polymer (COP) nanosheets are unique materials with broad applications in energy storage and conversion, chemical sensing, and gas storage. It remains challenging to develop an efficient method to fabricate COP nanosheets from designed monomers, especially for self-exfoliated COPs. Herein, we present a new strategy to prepare self-exfoliated COPs by reversible condensation of hexahydroxytriphenylene (HHTP) with phenyltrimethoxysilane. The prepared COP has a pentacoordinated silicon center and negatively charged surface, making it easily exfoliated to nanosheets with 1.07 nm thickness. Moreover, this COP could be used as a highly selective electrochemical sensor for dopamine (DA) in the range of 0.1–120 μM with a detection limit at 52 nM (S/N = 3). This study provides a new strategy for designing ionic COP nanosheets and expands the application of ionic COP for electrochemical sensing.