Síntese, caracterização estrutural e mecanismo de transferência de energia em complexos fotoluminescentes de Eu3+, Gd3+ e Tb3+ derivados do anti-inflamatório não esteroidal naproxeno

• Autor(a) principal: Gomes, Emmanuel Maciel
• Data de Publicação: 2018
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/15659
• topic: Spectroscopy; Luminescence; Coordination Compounds; Lanthanides; Espectroscopia; Compostos de Coordenação; Luminescência; Lantanídeos; CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA

The great appeal in obtention and study of the lanthanide (Ln) elements is directly associated with the diverse applications of their coordination compounds, which are very attractive for the development of new multifunctional materials with magnetic, biological, catalytic and optical properties. Most of these applications are related to the spectroscopic properties of these coordination compounds, which present excellent photoluminescent properties and can therefore be used as Molecular Light Converting Devices (DMCLs), applied to television screens, cell phones, radars and radiation detectors. In this context, the present work proposes the synthesis, characterization and investigation of the photoluminescent properties of 12 coordination compounds of lanthanides (Eu3+, Gd3+ and Tb3+), which can act as efficient DMCLs, complexed with the carboxylate ligand derived from the non-inflammatory steroidal naproxen (nap) and N, N-donors, such as 2,2'-bipyridine (bpy), 1,10-phenanthroline (phen) and 4,4'-dimethyl-2,2'-bipyridine(4,4 -dmbpy). The synthesized complexes were characterized by several analytical and spectroscopic techniques such as elemental analysis (% CHN), infrared spectroscopy (FTIR), diffuse reflectance spectroscopy (DR), powder X-ray diffraction (XRD), photoluminescence spectroscopy (PL), where the excitation and emission spectra, and lifetimes decays were analyzed. Also, through the Sparkle method, the fundamental state geometry of the Eu3+ complexes were obtained and used to calculate the various luminescence parameters. These parameters are in excellent agreement with those obtained experimentally.