The potential utility of room temperature ionic liquids as electrolytes in current electrochemical applications has been explored. Hence, the electrochemical behavior of [Ni(tmc)]Br2 complex at a glassy carbon electrode in the absence or in the presence of unsaturated halides in the ionic liquids, 1-ethyl-3- methylimidazolium ethylsulfate, [C2mim][C2SO4] and N,N,Ntrimethyl- N-(2-hydroxyethyl) ammonium bis(trifl...
Dissertação de mestrado em Técnicas de Caraterização e Análise Química ; Os bio-solventes são solventes biodegradáveis, o que significa que após o seu uso podem ser decompostos pelos microorganismos presentes no meio ambiente. Para evitar o uso dos solventes orgânicos voláteis novos solventes têm sido desenvolvidos e utilizados como é o caso dos fluidos supercríticos e mais recentemente os líquidos iónicos. Os...
We report a method to realize tunable chromatic dispersion compensation based on chirped fiber Bragg gratings (CFBG). The changes on the CFBG dispersion are achieved by controlling a temperature gradient applied to the grating. A thermodynamic model is presented enabling us to simulate the temperature distribution along the grating lenght. Furthermore, a theoretical approach was de...
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