Propuesta para el desarrollo de un quimiosensor colorimétrico partiendo de nanopartículas de oro modificadas con ligandos L-Cisteína y L-Glutatión, para la detección de iones mercurio (Hg+2) en medio acuoso

Two colorimetric (fluorescent) chemosensors were synthesized, starting from gold nanoparticles (AuNp) of hydrophilic character, which on their surface are linked with an amino acid (L-cysteine) Cys and an oligopeptide (L-glutathione) GSH which when interacting with AuNp by means of a covalent bond coordinated with the sulfur of the ligands (dimerization of disulfide bridges), this proved to change the optical properties of the nanoparticles. The chemosensors were synthesized by means of the Bottom Up method, which was proposed in two ways, cold bath and reflux (not greater than 40 ° C), also led to characterization of the optical properties by UV-vis and Fluorescence, and for the structural properties by FT-IR, DRX, NMR and TEM. The fluorescent optical properties were calculated and determined by demonstrating a quantum yield of 5% for a nanoparticle with GSH and 4% for a nanoparticle with Cys.

• Fecha de publicación: 2020
• Institución: Universidad de América
• Repositorio: Lumieres
• Idioma: spa
• OAI Identifier: oai:repository.uamerica.edu.co:20.500.11839/7769
• Acceso en línea: https://hdl.handle.net/20.500.11839/7769
• Palabra clave: Nanopartículas de oro; Fluorescencia; Ligandos; Límite de detección; Gold nanoparticles; Fluorescence; Detection limit; Detection limit; Tesis y disertaciones académicas
• License: Atribución – No comercial – Sin Derivar