Electrochemical properties fullerene adducts

Electric fleld gradient, 22 214-218 Electroabsorption spectroscopy, 41 279 class II mixed-valence complexes, 41 289, 291, 294-297 [j(jl-pyz)]=+, 41 294, 296 Electrocatalytic reduction, nickel(n) macro-cyclic complexes, 44 119-121 Electrochemical interconversions, heteronuclear gold cluster compounds, 39 338-339 Electrochemical oxidation, of iron triazenide complexes, 30 21 Electrochemical properties fullerene adducts, 44 19-21, 33-34 nickeljll) macrocyclic complexes, 44 112-113... 

The electrochemical properties of all of these bis-adducts have been studied in reasonable detail, using either cyclic voltammetry (CV) or steady-state voltammetry (SSV) at a rotating disk electrode [10]. While many interesting observations have been made about their electrochemical behavior, the most relevant to the present work concerns the cis-2 isomer, 3 [11]. The bis(methano)fullerenes with a cis-2 addition pattern exhibit a chemically irreversible second one-electron reduction, as determined by using CV and SSV on a rotating disk electrode. Of all the isomers studied, the cis-2 is the only one that exhibits such an irreversible second reduction step on the voltammetric time scales. This observation led to the initiation of a project that eventually culminated in the observations that are presented in this chapter. Most of the work reported here was... 

J. Probing electrochemical properties of rr-Conjugated thienylenevinylenes/fullerene C60 adducts by ESI-MS Evidence for dimerized cation-radicals. J. Mass Spectrom 2002, 37, 1081-1085. 

In a very elegant approach, Okamura et al. attached Cgo to a range of styrene polymers with different molecular weights (from 1000 to 10,000) [32]. The attachment was provided by 1,4-radical addition to Cgg, producing narrow-dispersity polystyryl adducts (Scheme 3). The electrochemical and ground state absorption properties of the polymers were identical to those of a low-mass, fully characterized model (Scheme 3). This indicates that the reported procedure is useful for the preparation of high-mass polymers, with retained fullerene properties. 

Promising research was carried out on the reduction of fullerene derivatives, which is expected to tune the sphere s electronic properties and investigate how the nature, geometry, structure, and number of adducts influence the electrochemical behavior of this fidlerene [33]. The nature and the number of the adduct groups could both increase and decrease the electron affinity, as observed in CV experiments. Hydrofidlerene [172] and epoxyfullerene [173] are two examples in... 

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