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Previous issue date: 2016-07-20 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / O objetivo deste trabalho ? contribuir com o desenvolvimento da qu?mica de coordena??o do sistema cobre-fenantrolina, atrav?s da s?ntese e caracteriza??o de novos complexos met?licos do tipo [Cu(phen)(L)2] onde L refere-se a ligantes derivados da vanilina. Atrav?s da caracteriza??o dos complexos [Cu(phen)(asv)2], [Cu(phen)(asvred)2] e [Cu(phen)(dhz)2], por infravermelho, foram identificados que os ligantes derivados da vanilina encontram-se coordenados ao centro met?lico de forma bidentada atrav?s dos grupos vanil?ides e que a fenantrolina ? mantida na esfera de coordena??o do metal. Os espectros eletr?nicos dos complexos, obtidos em acetonitrila, apresentaram bandas intraligantes da fenantrolina com elevada absortividade molar, bandas intraligantes t?picas do ligante vanil?ide L, com deslocamentos hipsocr?micos e batocr?micos em rela??o ao ligante n?o coordenado e ainda transi??es d-d, as quais reafirmam a forma??o do complexo. A identifica??o da fluoresc?ncia do ligante do ligante asv foi realizada tanto no estado s?lido quanto em solu??o de acetonitrila. O espectro de fluoresc?ncia deste composto apresentou uma banda de emiss?o em 506 nm, que corresponde ? regi?o da cor verde, quando da excita??o na regi?o no ultravioleta. Os potenciais de redu??o do Cu2+/1+ nos complexos [Cu(phen)(asv)2], [Cu(phen)(asvred)2] e [Cu(phen)(dhz)2] foram observados, respectivamente, em - 62, - 45 e - 126 mV vs Ag/AgCl. Os valores obtidos encontram-se em uma faixa de potencial considerada adequada (261 a -523 mV) para que o cobre, quando reduzido a Cu1+, seja capaz de gerar esp?cies reativas de oxig?nio em meio biol?gico. / The objective of this work is to contribute to the development of coordination chemistry of copper-phenanthroline system, through the synthesis and characterization of new metal complexes of the type [Cu(phen)(L)2] where L refers to vanillin derivatives ligands. Through characterization of the complex [Cu(phen)(asv)2], [Cu(phen)(asvred)2] and [Cu(phen)(dhz)2], by infrared, it was identified that the binders derived from vanillin are coordinated to the metal center bidentately through the vanilloid groups and the phenanthroline is maintained in the coordinating sphere of the metal. The electron spectra of the complexes, obtained in acetonitrile, presented intraligant bands of phenanthroline with high molar absorptivity, intraligant bands typical of the vanilloid ligand L, with hypochromic and bathochromic displacements in relation to the uncoordinated ligand and also d-d transitions, which reaffirm the formation of the complex. The fluorescence identification of the ligand of the asv ligand was performed both in the solid state and in acetonitrile solution. The fluorescence spectrum of this compound had an emission band at 506 nm, which corresponds to the green color region, when excited in the ultraviolet region. The potential for reducing the Cu2+/1+ in the complex, [Cu(phen)(asv)2], [Cu(phen)(asvred)2] and [Cu(phen)(dhz)2], were observed, respectively, - 62, - 45 and - 126 mV vs. Ag / AgCl. The values obtained are in a potential range considered appropriate (261 to -523 mV) for the covers, when reduced to Cu1+, is capable of generating reactive oxygen species in a biological environment.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/22254 |
| Date | 20 July 2016 |
| Creators | Oliveira, Aim?e Ataide de |
| Contributors | 42396441353, Oliveira, Fernando Jos? Volpi Eus?bio de, 30456068813, http://lattes.cnpq.br/5600786330033497, Silva, Francisco Ordelei Nascimento da, 79629970368, http://lattes.cnpq.br/7252349929698043, Pontes, Daniel de Lima, Pontes, Ana Cristina Facundo de Brito |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM QU?MICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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