Carvalho André, Branco Luis C, Corrêa Leticia R C, Paninho Ana B, Esteves Pierre M, Cruz Hugo, Freitas Sunny K S
Escola Superior de Tecnologia do Barreiro, Rua Américo da Silva Marinho, s/n, 2839-001, Lavradio, Portugal.
LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, NOVA University of Lisbon, Campus de Caparica, 2829-516 Caparica, Portugal.
Heliyon. 2024 Aug 13;10(16):e36181. doi: 10.1016/j.heliyon.2024.e36181. eCollection 2024 Aug 30.
Ionic Covalent Organic Frameworks are a special subgroup that has risen as promising materials for innovative applications. In parallel, some of the so-called Reticular Innovative Organic compounds (RIOs), which are ionic and non-ionic porous materials have been used with great versatility, for several purposes. In this work, the ionic dye-based RIO-55 was chosen to capture a series of lanthanides (Eu, Gd, Dy, and Tb) from water, observing their affinity with the lattice and the performance of the adsorbent. Thus, the higher adsorbed amount was referred to as Eu (Q = 370 mg/g), as well as the best affinity (K = 5x10), following the Langmuir model. The impregnated Eu@RIO-55 was used for chemical sensing, capturing dopant molecules (ephedrine and dopamine) from water, showing great performance, even after some reuse cycles. In addition, some initial fluorescence tests were performed using RIO-55 and Eu@RIO-55 to observe the spectrum before and after lanthanide impregnation.
离子共价有机框架是一类新兴的特殊材料，有望用于创新应用。与此同时，一些所谓的网状创新有机化合物（RIOs），即离子型和非离子型多孔材料，已被广泛用于多种目的。在这项工作中，选择了基于离子染料的RIO-55从水中捕获一系列镧系元素（铕、钆、镝和铽），观察它们与晶格的亲和力以及吸附剂的性能。因此，根据朗缪尔模型，吸附量最高的是铕（Q = 370 mg/g），亲和力也最佳（K = 5x10）。负载铕的Eu@RIO-55用于化学传感，从水中捕获掺杂剂分子（麻黄碱和多巴胺），即使经过一些重复使用循环，仍表现出优异的性能。此外，还使用RIO-55和Eu@RIO-55进行了一些初步荧光测试，以观察镧系元素负载前后的光谱。
