Electrochemical Reactions of Organometallic Microparticles

The organic and organometallic complexes of transition metals are especially important in catalysis and photovoltaics, on the basis of their redox and electron-mediating properties. Whilst most complex compounds can be studied in (organic) solution-phase experiments, their solid-state electrochemistry (often in an aqueous electrolyte solution environment) is in general also easily accessible by attaching microcrystalline samples to the surface of electrodes. Quite often, the voltammetric characteristics of a complex in the solid state will differ remarkably from its characteristics monitored in solution. Consequently, chemical, physical or mechanistic data are each accessible via the voltammetry of immobilized microparticles. 

A selection of organic and organometallic compounds studied in recent years using the voltammetry of immobilized microparticles is listed in Tables 6.2 and 6.3 however, only selected contributions will be described briefly in the following sections. 

Whilst conducting a series of experimental and theoretically based studies, the group of Bond highlighted the value of voltammetric measurements with microparticles attached to an electrode in contact not only with aqueous or organic electrolyte solutions but also with ionic liquids such as N,N-dimethylammonium N, N -dimethylcarbamate (DIMCARB or BMIM ). In this way, both thermodynamic and kinetic information could be obtained [81, 92-94,107,108]. Within this context, two benefits should perhaps be mentioned  

Likewise, Komorsky-Lovric et al. investigated the behavior of lutetium bisphtha-locyanine with the voltammetry of microparticles [108]. This solid-state reaction (which may be studied with either square-wave or cyclic voltammetry) was shown to proceed via the simultaneous insertion/expulsion of anion ions. The oxidation was found to have quasi-reversible characteristics in electrolyte solutions containing perchlorate, nitrate, and chloride, whereas bromide and thiocyanate 

Trivial name or compound class Compound Relerence(s) 

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