Journal article

Electrocrystallization of phase I, CuTCNQ (TCNQ=7,7,8,8-tetracyanoquinodimethane), on indium tin oxide and boron-doped diamond electrodes

Anthony P O'Mullane, Aaron K Neufeld, Alexander R Harris, Alan M Bond



The electrochemical reduction of TCNQ to TCNQ*- in acetonitrile in the presence of [Cu(MeCN)4]+ has been undertaken at boron-doped diamond (BDD) and indium tin oxide (ITO) electrodes. The nucleation and growth process at BDD is similar to that reported previously at metal electrodes. At an ITO electrode, the electrocrystallization of more strongly adhered, larger, branched, needle-shaped phase I CuTCNQ crystals is detected under potential step conditions and also when the potential is cycled over the potential range of 0.7 to -0.1 V versus Ag/AgCl (3 M KCl). Video imaging can be used at optically transparent ITO electrodes to monitor the growth stage of the very large branched crystals forme..

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