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Unusual Effects of Tetramethylammonium Ion on the Voltammetry of Polycyclic Aromatic Hydrocarbons

Institute Seminar

Albert J. Fry, PhD (Wesleyan University, Connecticut, USA)

9.10.2009 at 10:30 in BrdiÄŤka hall

Abstract:
The voltammetric behavior of polycyclic aromatic hydrocarbons in aprotic solvents is known to be affected by the nature of the cation of the supporting electrolyte. This is because of ion-pairing of the cation to the electrogenerated hydrocarbon dianion. In general, the strength of ion-pairing decreases as the size of the cation increases, which may be a steric effect. However, tetramethylammonium ion is unusual in that it appears to form a weaker ion pair than some larger cations. We have carried out a lengthy computational study which has revealed the cause of this behavior.




(Field of research: Synthetic and mechanistic organic electrochemistry; metal-ion and metal complex mediated organic electrode reactions; electrochemical behavior of benzenoid and non-benzenoid aromatic hydrocarbons; electrochemically-driven enzymatic synthesis of amino acids, application of quantum chemical computational techniques to electrochemical problems. )



Some photos from the seminar.....
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