Detection of anthrax biomarker and metallic ions in aqueous media using spherical-shaped lanthanide infinite coordination polymers

Autor(es)

Arroyos, Guilherme ; Campanella, Jonatas E. M. ; da Silva, Caroline M. ; Frem, Regina C. G.

• Tipo de documento: Artigo Científico
• Fonte: SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY; v. 286, p. 9-pg., 2023-02-05.

Resumo

We report a lanthanide-based infinite coordination polymer (ICP) system synthesized using pyrazole-3,5-dicarboxylic acid as linker, malonic acid as coordination modulator and water as solvent. The precursors self -assembly into microspherical particles, which are water-stable and exhibit excellent dispersibility. Bimetallic samples based on Tb3+ doped with Eu3+ were investigated as ratiometric dipicolinic acid (DPA) sensors, which is a biomarker for Bacillus anthracis spores. Along with the calibration curves, a detection in a real sample extracted from Bacillus subtilis (model organism) was performed. The samples proved to be highly sensitive and selective for ratiometric DPA detection. In a secondary study, the monometallic sample containing only Tb3+ was also investigated as a sensor for ionic species in aqueous media. The Cr3+, Fe3+, Cu2+, and Cr2O72-ionic species could be detected in water by luminescence quenching mechanism. Therefore, we found that the reported ICP system can be judiciously constructed in order to act as a multimodal probe for several chemical species. (AU)

• Processo FAPESP: 18/09898-3 - Polímeros de coordenação infinitos baseados em íons terras-raras e pirazol-3,5-dicarboxilato: propriedades estruturais, morfológicas e luminescentes
• Beneficiário: Guilherme Arroyos
• Modalidade de apoio: Bolsas no Brasil - Doutorado