Tesis
Síntese e caracterização do complexo de ferro II contendo ligantes heterocíclicos nitrogenados
Fecha
2017-09-04Registro en:
SANTOS, Jesyca Mayra Freitas Dias dos. Síntese e caracterização do complexo de ferro II contendo ligantes heterocíclico nitrogenados. 2017. 57 f. Dissertação (Mestrado em Ciência de Materiais) - Universidade Federal de Mato Grosso, Instituto de Ciências Exatas e da Terra, Barra do Garças, 2017.
Autor
Santos, Wagner Batista dos
http://lattes.cnpq.br/2954701220427351
Santos, Wagner Batista dos
848.835.106-20
http://lattes.cnpq.br/2954701220427351
Batalini, Claudemir
049.981.198-42
http://lattes.cnpq.br/7010971943766277
848.835.106-20
Tussolini, Martha
053.271.329-00
http://lattes.cnpq.br/3219081830140019
Institución
Resumen
This work aimed to synthesize and characterize an iron (II) complex with
nitrogenous heterocyclic ligands. The complex was characterized by
spectroscopy in the visible ultraviolet and medium infrared regions. Qualitative
tests using silver nitrate and solubility were performed to aid in the
determination of the structural composition of the complex. Computational
studies were performed to determine the energy of the isomers and thus
determine the probable structure of the complex. Analysis with silver nitrate
indicated that the chlorides are coordinated to the metal indicating the formation
of a neutral complex. The solubility test indicated that the complex has low
solubility in the solvents tested which is characteristic of neutral coordination
compounds. The visible ultraviolet absorption spectrum allowed to verify a band
profile at 497 nm attributed to the MLCT type. The spectroscopy in the middle
infrared region showed bands characteristic of the bipyridine and
isonicotinamide ligands and showed that the coordination of the ligands to the
metallic center occurred through the nitrogen atom of the pyridine rings. The
theoretical study of the isomers was carried out using the computational
calculation to optimize the structures of the isomers and simulation of
spectroscopic techniques. These studies provided important parameters that
helped to distinguish a possible geometric structure (cis or trans). The thermal
analysis study TG-DTA was used in order to verify the oxidation state of the
metal.