Tough Porous Hydrogels for Ultrasensitive Naked-Eye and Fluorescence Dual-Mode Detection of Iron(III)

IF 4.4 2区 化学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Liang Chen*, Yao Li, Xincheng Zhang, Yuanzhi Cui, Da Shi, Yan Wang, Ping Rao*, Liping Zhao*, Hua Guo, Mingming Guo and Wenshan Ren*, 
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Abstract

Iron ions (Fe3+) play a crucial role in a variety of environmental, industrial, and biological processes. However, elevated concentrations of iron ions can lead to significant issues, such as environmental pollution, health risks, and accelerated material degradation, including metal corrosion. Therefore, the ability to rapidly and accurately detect Fe3+ ions at low concentrations is essential to ensure environmental safety, public health, and industrial stability. In this study, a series of tough luminescent porous hydrogels were fabricated through the cryogelation method by introducing 4′-(N-propenyl-4-pyridinio)-2,2′:6′,2″-terpyridine perchlorate (PPTP) into a hydrogel network featuring multihydrogen bonding. The obtained porous hydrogels exhibit not only outstanding fracture strength but also rapid highly sensitive detection of low concentrations of Fe3+ ions. Notably, the hydrogel sensors achieved a theoretical limit of detection (LOD) of 0.34 μM within just 10 s, which is acceptable within the limit of the Minister of Health of the People’s Republic of China. Additionally, a distinctive feature of this porous hydrogel is its ability to visually detect iron ion content through a color change from white to light green, providing a simple and effective method for real-time monitoring of early-stage stainless-steel corrosion. This combination of ease of fabrication, high sensitivity in fluorescence detection, colorimetric response, and convenient usage makes the P(MNAGA-co-HEMA-co-PPTP) hydrogel a highly effective fluorescent chemosensor for Fe3+ ions.

Abstract Image

用于超灵敏裸眼和荧光双模检测铁(III)的坚韧多孔水凝胶
铁离子(Fe3+)在各种环境、工业和生物过程中起着至关重要的作用。然而,铁离子浓度升高可能导致重大问题,如环境污染、健康风险和加速材料降解,包括金属腐蚀。因此,快速准确地检测低浓度Fe3+离子的能力对于确保环境安全、公众健康和工业稳定至关重要。本研究将4 ' -(n -丙烯-4-吡啶)-2,2 ':6 ',2″-高氯酸三吡啶(PPTP)引入多氢键的水凝胶网络,通过冷冻法制备了一系列坚韧的发光多孔水凝胶。制备的多孔水凝胶不仅具有优异的断裂强度,而且对低浓度Fe3+离子具有快速、高灵敏度的检测能力。值得注意的是,水凝胶传感器在10秒内实现了0.34 μM的理论检测限(LOD),这在中华人民共和国卫生部规定的范围内是可以接受的。此外,这种多孔水凝胶的一个显著特点是,它能够通过颜色从白色到浅绿色的变化,直观地检测铁离子含量,为不锈钢早期腐蚀的实时监测提供了一种简单有效的方法。P(MNAGA-co-HEMA-co-PPTP)水凝胶具有易于制造、荧光检测灵敏度高、比色响应和使用方便等特点,是一种高效的Fe3+离子荧光化学传感器。
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来源期刊
CiteScore
7.20
自引率
6.00%
发文量
810
期刊介绍: ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.
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