Impregnation of different lanthanides in a covalent organic framework (RIO-55) to a chemical determination of dopants substances
André Carvalho,
Luis C. Branco,
Leticia R.C. Corrêa,
Ana B. Paninho,
Pierre M. Esteves,
Hugo Cruz,
Sunny K.S. Freitas
Affiliations
André Carvalho
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
Luis C. Branco
LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, NOVA University of Lisbon, Campus de Caparica, 2829-516 Caparica, Portugal
Leticia R.C. Corrêa
Instituto de Química, Universidade Federal do Rio de janeiro, Avenida Athos da Silveira Ramos, 149, CT A-622, Cidade Universitária, Ilha do Fundão, Rio de Janeiro 21941-909, Brazil
Ana B. Paninho
LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, NOVA University of Lisbon, Campus de Caparica, 2829-516 Caparica, Portugal
Pierre M. Esteves
Instituto de Química, Universidade Federal do Rio de janeiro, Avenida Athos da Silveira Ramos, 149, CT A-622, Cidade Universitária, Ilha do Fundão, Rio de Janeiro 21941-909, Brazil
Hugo Cruz
LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, NOVA University of Lisbon, Campus de Caparica, 2829-516 Caparica, Portugal; Corresponding author.
Sunny K.S. Freitas
LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, NOVA University of Lisbon, Campus de Caparica, 2829-516 Caparica, Portugal; Corresponding author.
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 Eu3+ (Qmax = 370 mg/g), as well as the best affinity (KL = 5x10−3), following the Langmuir model. The impregnated Eu3+@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 Eu3+@RIO-55 to observe the spectrum before and after lanthanide impregnation.
