Synthesis of Stable 2D Conductive Lanthanide Organic Frameworks (Lu-HHTP) for High-Performance Humidity Sensors

IF 3.4 Q2 CHEMISTRY, ANALYTICAL
Dr. Shan Jiang, Xichao Mo, Xuefei Zhao, Xiaohui Yan, Zhaorui Zhang, Jiahao Liu, Huashuai Hu, Nan Wang, Prof. Minghui Yang
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Abstract

Two-dimensional conductive metal-organic frameworks (MOFs) featuring structural diversity and high porosity represent promising platforms for chemiresistive humidity sensing. The precise control of the structure of lanthanide-based MOFs and an exploration of its impact on charge transport and sensing applications have consistently been focal points for researchers. In this study, we present the synthesis and characterization of Lu-HHTP (HHTP=2,3,6,7,10,11-hexahydroxytriphenylene) as highly crystalline and conductive porous materials. The polymeric framework of Lu-HHTP encompasses 1D hexagonal channels and exhibits interlayer π–π stacking, resulting in a material with a high surface area and uniform rod-like microstructure. Benefiting from its elevated electrical conductivity, the Lu-HHTP-based humidity sensor exhibited commendable sensing properties within the relative humidity range of 33 % to 95 % at room temperature (25 °C), achieving a response value as high as 19 at 95 % relative humidity. Furthermore, the sensor displayed superior repeatability, characterized by rapid response and recovery speeds in the presence of moisture. These findings indicate that Lu-HHTP holds substantial promise as a material for humidity sensors.

Abstract Image

为高性能湿度传感器合成稳定的二维导电镧系元素有机框架 (Lu-HHTP)
具有结构多样性和高孔隙率的二维导电金属有机框架(MOFs)是化学电阻湿度传感的理想平台。如何精确控制镧系元素基 MOF 的结构,并探索其对电荷传输和传感应用的影响,一直是研究人员关注的焦点。在本研究中,我们合成并表征了高结晶导电多孔材料 Lu-HHTP(HHTP = 2,3,6,7,10,11-六羟基三亚苯)。Lu-HHTP 的聚合物框架包括一维六边形通道,并呈现层间 π-π 堆积,从而形成了一种具有高表面积和均匀棒状微结构的材料。得益于其较高的导电性,基于 Lu-HHTP 的湿度传感器在室温(25°C)下 33% 至 95% 的相对湿度范围内表现出令人称道的传感性能,在 95% 的相对湿度下响应值高达 19。此外,该传感器还表现出优异的可重复性,其特点是在潮湿环境中响应和恢复速度快。这些研究结果表明,Lu-HHTP 很有希望成为湿度传感器的一种材料。
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CiteScore
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