Hydrogen-bonded organic framework-based core-shell structures via a pore confinement control strategy for high performance SERS sensing

文献类型： 外文期刊

第一作者： Sun, Yuebo

作者： Sun, Yuebo;Liu, Yaling;Wang, Peilong;Cheng, Jie

作者机构：

关键词： Ag Microwire; Hydrogen-bonded organic frameworks; Core-shell Structures; SERS; Sensing

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.2； 五年影响因子：13.5 ）

ISSN： 1385-8947

年卷期： 2024 年 499 卷

页码：

收录情况： SCI

摘要： With unprecedented advantages such as extremely high porosity, large specific surface area and controllable pore size, many crystalline porous materials such as metal-organic frameworks (MOFs), covalent organic frameworks (COFs) could be synthesized on the surface of novel metal nanoparticles, forming core-shell structures to enhance the sensing performance of surface-enhanced Raman spectroscopy (SERS). The flexible hydrogen bonds provide hydrogen-bonded organic frameworks (HOFs) with some outstanding advantages, such as mild preparation conditions, good solubility, and easy regeneration during processing, making HOFs a potentially tunable platform for building functional materials. Here, a novel hybrid core-shell structure consisting of an Ag microwire core and a HOF shell (AgMW @ HOF) was prepared under mild preparation conditions for SERS detection. It was found that three main factors, including the surface hydrogen bond attractive interaction, differential induction of adsorption energy and especially pore confinement, synergistically promoted the SERS sensing performance. By controlling the pore size of the HOF shell to a suitable dimension, the designed AgMW @ HOF substrates exhibited high SERS activity for the quantitative detection of the 1,2-bis (4-pyridyl) ethylene (BPE) probe in the concentration range of 200- 1000 ng & sdot;mL- 1 . Impressively, the substrates maintained stable sensing characteristics in terms of batch-to-batch reproducibility, 5-week shelf life and at least 4 times reusability, even under acidic conditions. Furthermore, the proposed HOF-based core-shell structures were fabricated as a SERS chip. When integrated with a proprietary real-time pollutant monitoring system, the developed substrates demonstrated high reliability for unattended pesticide monitoring of the flowing water system. Importantly, the revealed enhanced mechanisms can promote the development of the HOF-based SERS sensing.

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