Mass transport and heterogeneous electron transfer of a ferrocene derivative in a room-temperature ionic liquid

Ultramicroelectrode Voltammetry and Scanning Electrochemical Microscopy in Room Temperature Ionic Liquids

“…In this case, the k 0 value obtained from fitting the experimental data to Eq. (4.14) (7.6 × 10 −3 cm/s) was slightly higher than that obtained using cyclic voltammetry (4.25 × 10 −3 cm/s) and was also slightly higher than that determined by Hapiot and co-workers for the same system using cyclic voltammetry and electrochemical impedance spectroscopy [8]. Walsh and co-workers have also used the same method to determine k 0 for Fc oxidation in a series of imidazolium-based RTILs with varying viscosities [9].…”

“…Such is the impact of its development that the scanning electrochemical microscope (SECM-the same abbreviation is used for the instrument and the method) is now a "textbook" electroanalytical tool used in a wide variety of applications, ranging from fundamental studies of mass and charge transfer dynamics to molecular transport across biological cell membranes, corrosion analysis and electrocatalyst screening [3,4]. Given the increasing popularity of room-temperature ionic liquids (RTILs) in electrochemical studies and devices [5,6], it was perhaps inevitable that SECM measurements would also be carried out in RTILs and a number of such studies have appeared in the recent literature [7][8][9][10]. However, the unique physicochemical properties of RTILs can lead to very unusual behaviour being observed during SECM.…”

Synthesis and characterization of an electroactive ionic liquid based on the ferrocenylsulfonyl(trifluoromethylsulfonyl)imide anion

“…Research on ILs is motivated in large part by the many possible chemical modifications that can be made to one of their components to impart a specific functionality to the melt. These so-called functionalized or task-specific ILs (TSILs) have been developed for many applications such as metal ion extraction [6], organic synthesis [7], CO 2 capture (separation) [8], extraction [9], transition metal catalysis [10], nanoparticle synthesis [11], selfassembled monolayer formation [12] and electrochemistry [13,14]. A clear example of TSILs relevant to the field of electrochemistry is found through the modification of alkylimidazoliums with a ferrocenyl redox moiety, resulting in an intrinsically electroactive liquid.…”

Diffusion regimes at nanoelectrode ensembles in different ionic liquids

“…Particularly interesting is the role of ILs in ruling the mass transport of electroactive analytes to the electrode/solution interface [5][6][7][8]. Moreover, the nature and characteristics of ILs can influence dramatically the electron transfer kinetics [9,10]. The large differences in size and ionic mobility of the cation and anion can originate selective solvation of solutes with different ionic charge.…”