Abstract：
Cross-responsive chemical sensors are in high demand owing to their ability to distinguish a broad range of analytes. In this study, a vapochromic sensor array based on metal-organic frameworks (MOFs), which exhibits distinct patterns when exposed to volatile organic compounds (VOCs) and humidity, is developed. Conventional sensor arrays consist of various receptors that produce different responses. The vapochromic MOF-based sensor comprises dicopper paddlewheel clusters and dimethylamine azobenzene as binary colorimetric sensing moieties. Upon exposure to VOCs, the constructed sensor encompasses a broad spectrum of colors, ranging from green to red. Furthermore, the color of the MOF is influenced by the solvent used during the pretreatment. Consequently, monolayered MOF thin films can be adapted to multicomponent array systems by immersing the MOF in different solvents. This system provides both qualitative and quantitative sensing, generating unique color patterns corresponding to specific VOC types. Notably, the sensor successfully discriminates each of 14 common VOCs and water and accurately categorizes unknown samples. Moreover, the system undergoes reversible color changes in response to humidity, obviating the need for high-temperature regeneration steps. This novel approach offers insights into the versatile applications of MOFs by creating a colorimetric sensor array capable of detecting various analytes.
摘要：
交叉响应化学传感器由于其区分宽范围的分析物的能力而具有高需求。在这项研究中,我们开发了一种基于金属有机框架（MOFs）的蒸气变色传感器阵列，当暴露于挥发性有机化合物（VOC）和湿度时，它表现出不同的模式。常规传感器阵列由产生不同响应的各种受体组成。我们的基于波致变色MOF的传感器包括dicopper桨轮簇和二甲胺偶氮苯作为二元比色传感部分。当暴露于VOCs时,构造的传感器包含广泛的颜色，从绿色到红色。此外，MOF的颜色受预处理期间使用的溶剂的影响。因此,单层MOF薄膜可以通过将MOF浸入不同的溶剂中而适用于多组分阵列系统。该系统提供定性和定量传感，生成对应于特定VOC类型的独特颜色模式。值得注意的是,该传感器成功区分了14种常见的VOC和水，并对未知样本进行准确分类。此外，系统会随着湿度而发生可逆的颜色变化，避免了对高温再生步骤的需要。这种新颖的方法通过创建能够检测各种分析物的比色传感器阵列，为MOF的通用应用提供了见解。本文受版权保护。保留所有权利。
