Estudos espectroscópicos da interação de dióxido de enxofre com aminoálcoois e complexos de níquel. Versão corrigida da Dissertação conforme Resolução CoPGr 5890 O original se encontra disponível na Secretaria de Pós-Graduação do IQ-USP São Paulo Data do Depósito na SPG: 04/12/2012 DEBORAH REAN CARREIRO MATAZO DOS SANTOS Estudos espectroscópicos da interação de dióxido de enxofre com aminoálcoois e complexos de níquel. 2012 3 4 Dedicatórias Dedicado aos meus queridos pais Antoninho e Regina por

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... seu apoio, cuidado, carinho, dedicação, amor e conselhos. Dedico também ao meu esposo, companheiro e amigo Diego pela força desde o momento em que nos conhecemos. A todos amigos que estiveram ao meu lado nesses anos, em especial, ABSTRACT Matazo, D. R. C. , Spectroscopic studies on the interaction of sulfur dioxide with aminoalcohols and nickel complexes. 2012. 131p.. Masters Thesis -Graduate Program in Chemistry. In this work we focus on two sulfur dioxide containing systems due to the relevance of this molecule in environmental science and its interesting physico-chemical properties as its amphoteric characteristic and ability to interact with inorganic systems through oxygen or sulfur atoms. The main tools for investigation was vibrational spectroscopy (Raman scattering and Infrared absorption), electronic spectroscopy (UV-VIS) and Nuclear Magnetic Resonance (NMR), whereby the intra and intermolecular interactions were probed. The first subject of investigation was the study of interactions between SO 2 and amino alcohol. This system shows great ability to capture SO 2 , highlighting the zwitterionic formation due to the bonding of SO 2 via the alcoholic part of the amino alcohol molecule, what is only possible due to the presence of the amino group to stabilize the charge separation, the stability of the poduct depends on the steric hindrance and on the charge separation. The reversibility of the system was investigated and it was always accompanied by degradation of the amino alcohol. The second system consists in the investigation of interactions between SO 2 and two nickel-cyclam (1,4,8,11-Tetraazacyclotetradecane) complexes, where the metal is in different oxidation states (II/III). This work is different from previous in the sense that the analyses are carried out in anhydrous environment. In O 2 free environment we were able to see the