Thesis Title

Effects Of Ionic Liquids On The Electrogenerated Chemiluminescence Of Tris (2, 2'-Bipyridyl) Ruthenium (Ii) Chloride

Date of Graduation

Fall 2011

Degree

Master of Science in Chemistry

Department

Chemistry

Committee Chair

Mark Richter

Keywords

electro chemiluminescence, ECL, electrogenerated chemiluminescence, ionic liquids, ECL in ionic liquids

Subject Categories

Chemistry

Abstract

The electrochemistry, photoluminescence (PL) and coreactant electrogenerated chemiluminescence (ECL) of Ru(bpy)32+ (where bpy = 2,2′-bipyridine) using tri-n-propylamine (TPrA) as a coreactant was obtained in aqueous media containing the ionic liquids (IL's) 1-hexyl-3-methylimidazolium chloride [HC], 1-Ethyl-3-methylimidazolim-trifluoro-methane sulfonate [ES], 1-Ethyl-3-methylimidazolium tosylate [ET], or 1-methyl-3octylimidazolium chloride [MC] as additives. Minor shifts in the RuII/RuIII oxidation potential and photoluminescence emission maxima were observed in the presence of 0.1% (v/v) IL. When the excited state was generated electrochemically, the ECL signal is either attenuated (for HC, ES and ET) or enhanced (MC). Experiments indicate that change in the ECL signal is due to the adsorption of ionic liquid on to the surface of the electrode that concentrates the ECL reactants at or near the electrode surface.

Copyright

© Manjeera Malempati

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