Kim Do Yeob, Kim Dong Gyu, Jeong Bongjin, Kim Young Il, Heo Jungseok, Lee Hyung-Kun
ICT Creative Research Laboratory, Electronics & Telecommunications Research Institute, Daejeon 34129, Korea.
Department of Chemistry, Chungnam National University, Daejeon 34134, Korea.
Polymers (Basel). 2022 Jan 4;14(1):190. doi: 10.3390/polym14010190.
Phosphate sensors have been actively studied owing to their importance in water environment monitoring because phosphate is one of the nutrients that result in algal blooms. As with other nutrients, seamless monitoring of phosphate is important for understanding and evaluating eutrophication. However, field-deployable phosphate sensors have not been well developed yet due to the chemical characteristics of phosphate. In this paper, we report on a luminescent coordination polymer particle (CPP) that can respond selectively and sensitively to a phosphate ion against other ions in an aquatic ecosystem. The CPPs with an average size of 88.1 ± 12.2 nm are embedded into membranes for reusable purpose. Due to the specific binding of phosphates to europium ions, the luminescence quenching behavior of CPPs embedded into membranes shows a linear relationship with phosphate concentrations (3-500 μM) and detection limit of 1.52 μM. Consistent luminescence signals were also observed during repeated measurements in the pH range of 3-10. Moreover, the practical application was confirmed by sensing phosphate in actual environmental samples such as tap water and lake water.
由于磷酸盐是导致藻华的营养物质之一，在水环境监测中具有重要意义，因此磷酸盐传感器一直受到积极研究。与其他营养物质一样，对磷酸盐进行无缝监测对于理解和评估富营养化至关重要。然而，由于磷酸盐的化学特性，可现场部署的磷酸盐传感器尚未得到很好的发展。在本文中，我们报道了一种发光配位聚合物颗粒（CPP），它可以在水生生态系统中对磷酸根离子与其他离子进行选择性和灵敏的响应。平均尺寸为88.1±12.2 nm的CPP被嵌入膜中以便重复使用。由于磷酸盐与铕离子的特异性结合，嵌入膜中的CPP的发光猝灭行为与磷酸盐浓度（3 - 500 μM）呈线性关系，检测限为1.52 μM。在3 - 10的pH范围内重复测量期间也观察到了一致的发光信号。此外，通过检测自来水和湖水等实际环境样品中的磷酸盐，证实了其实际应用。
