Novel Chemical Stratefies for early detection of neurodegenerative diseases

Funder

Organizational Unit

Publications

Lanthanide-based organic salts: Synthesis, characterization, and cytotoxicity studies

Publication . Forte, Andreia; Gago, Sandra; Alves, Celso; Silva, Joana; Pedrosa, Rui; Laia, César A.T.; Marrucho, Isabel M.; Branco, Luis C.

The formulation of magnetic ionic liquids (MILs) or organic salts based on lanthanides as anions has been explored. In this work, a set of choline-family-based salts, and two other, different cation families, were combined with Gadolinium(III) and Terbium(III) anions. Synthetic methodologies were previously optimized, and all organic salts were obtained as solids with melting temperatures higher than 100 °C. The magnetic moments obtained for the Gd(III) salts were, as expected, smaller than those obtained for the Tb(III)-based compounds. The values for Gd(III) and Tb(III) magnetic salts are in the range of 6.55–7.30 MB and 8.22–9.34 MB, respectively. It is important to note a correlation between the magnetic moments obtained for lanthanides, and the structural features of the cation. The cytotoxicity of lanthanide-based salts was also evaluated using 3T3, 293T, Caco2, and HepG2 cells, and it was revealed that most of the prepared compounds are not toxic.

2023Journal article

Open access

Mesoporous silica nanoparticles with manganese and lanthanide salts: synthesis, characterization and cytotoxicity studies

Publication . Forte, Andreia; Gago, Sandra; Carrott, Manuela Ribeiro; Carrott, Peter; Alves, Celso; Teodoro, Fernando; Pedrosa, Rui; Marrucho, Isabel M.; Branco, Luis C

Several organic salts based on the combination of two different choline derivative cations and MnCl3−, GdCl4− and TbCl4− as anions were immobilized in mesoporous silica nanoparticles (MSNs) by a two-step synthetic method. Firstly, MSNs were functionalized with choline derivative cations with chloride anions and then the metals were incorporated by the reaction of the chloride with the respective metal chloride salts. These nanomaterials were fully characterized by different characterization techniques such as 1H-NMR, FT-IR, elemental analysis, TEM, TGA, N2 adsorption, XRD and DLS. These characterization data were important to confirm the successful functionalization of the nanomaterials and to access their textural properties and colloidal stability. The final materials were also characterized by ICP-MS that indicated the metal contents. The cytotoxicity profile was evaluated in four different cell lines (3T3, 293T, HepG2 and Caco-2), which shows some relevant differences between the metal organic salts and their immobilized analogues.

2021Journal article

Restricted access