| Abstract
| - In DMSO containing Br- ions, the heptyl viologen cation radical (HV•+) can form two different types oftwo-dimensional (2D) phase on Hg. Thus, HV•+ can take a planar conformation relative to the surface; however,depending on the applied potential, it can reorient itself to adopt a conformation where the bipyridine grouplies edge-on or tilted relative to the electrode surface. We analyzed the structure and stability of the twophases and found HV•+ and Br- ions to take part in a 1:1 ratio in both. We also studied the kinetics offormation of the two phases, as well as that of reorientation between them, and found both to involve two-dimensional nucleation and growth mechanisms.
|
