| Electrochemistry combined on-line with electrospray mass spectrometry has been investigated to study electrochemical reactions, such as electropolymerization of organic molecules, and electrochemical oxidation of biomolecules. In my research the electrochemistry of thiocyanate (SCN-) with tetrabutylammonium thiocyanate (Bu4NSCN), or ammonium thiocyanate (NH4SCN) as supporting electrolyte has been studied in acetonitrile at a gold and a platinum electrode. EC/ESMS spectra as a function of applied potential for SCN- are discussed in detail. At a platinum electrode, the direct detection of trithiocyanate (SCN)3 - has been shown for the first time verified by its isotopic pattern.; The electroreduction of C60 in dichlorobenzene with tetraethylammonium tetrafluoroborate (Et4NBF4) or tetrabutylammonium perchlorate (Bu4NClO4) as supporting electrolyte has also been investigated by EC/ESMS. Also, the electrochemical behavior of a C60 film with supporting electrolytes using different cations has been examined, negative ion EC/ESMS as a function of time at different applied voltages were obtained, and the electroreduction mechanism of C60 film was discussed in detail.; Adenosine triphosphate (ATP) release processes from polypyrrole/adenosine triphosphate (PP/ATP) films were also investigated by EC/ESMS. This technique allows the simultaneous and direct detection of ATP and its related species during electrochemical release. It is interesting to note that slow potential cycling allows a higher ATP release rate than did larger potential steps, and release rate and amount are film thickness dependent. |
