Unusual Effects of Tetramethylammonium Ion on the Voltammetry of Polycyclic Aromatic Hydrocarbons
Albert J. Fry, PhD (Wesleyan University, Connecticut, USA)
9.10.2009 at 10:30 in BrdiÄŤka hall
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.....