To address the need for a field-deployable in-situ technique for the accurate and reliable detection of organic contaminants in water, this work reports a new chemical sensing approach for the detection of aqueous MeCN. The approach relies on the reversible colorimetric/luminescent change in a transition metal complex. In this approach, a square planar platinum salt [Pt(tpy)Cl](PF₆) (tpy = 2,2′:6′,2″-terpyridine) demonstrated a reversible color change from yellow to red as well as a red shift in emission intensity upon exposure to aqueous MeCN. This observed spectroscopic change was induced by the incorporation of MeCN molecules withing the crystal lattice of the platinum salt, that resulted in an enhancement in the intermolecular Pt•••Pt interactions, which correlatively altered the electronic structure. The spectroscopic response was highly selective and quantitative for aqueous MeCN. This work illustrates a new technique for the rapid, selective, sensitive detection of aqueous MeCN, while also providing a general strategy for the detection of other small molecule contaminants.

为了满足对可现场部署的原位技术准确，可靠地检测水中有机污染物的需求，这项工作报告了一种新的化学传感方法，用于检测水性MeCN。该方法依赖于过渡金属络合物中可逆的比色/发光变化。在这种方法中，方形的平面铂盐[Pt（tpy）Cl]（PF ₆）（tpy = 2,2'：6'，2″-吡啶）表现出从黄色到红色以及红色的可逆颜色变化。暴露于含水MeCN时发射强度发生变化。观察到的光谱变化是由于结合了MeCN分子和铂盐的晶格而引起的，从而导致分子间Pt •••的增强。铂相互作用，相应地改变了电子结构。光谱响应对水性MeCN具有高度选择性和定量性。这项工作说明了一种用于快速，选择性，灵敏检测含水MeCN的新技术，同时还提供了检测其他小分子污染物的通用策略。