Exploring the Supramolecular Coordination Chemistry‐Based Approach for Nanotechnology

Probing the electronic delocalization in a cyclic pyrazine ruthenium cluster hexamer

“…This band-like structure can be associated with the electrochemical properties of the species explaining the electronic delocalization in the reduced states. A similar molecular orbital treatment was proposed in [14], which shows that the [Ru 3 O] core reductions imply in the addition of electrons in dπ orbitals with significant contribution of the bridging ligand π* orbitals. Therefore, the strong communication of inter-units is due to the dπ [Ru 3 O]-π* pz mixing.…”

“…The close proximity of the metal centers leads to substantial metal-metal coupling, enhancing the electronic delocalization in the triangular unit. Such symmetric clusters also provide suitable building blocks for assembling supramolecular structures and dendrimers [3][4][5][6][7]. Recent work on the electrochemistry of dendrimeric clusters has shown the occurrence of extended electronic delocalization at reduced states formally represented by Ru III Ru III Ru II , but decreasing considerably at higher oxidation states, e.g.…”

“…The processes represented as [Ru 3 O] n/m (Table 1) are assigned to the redox events of each monomer unit composing the hexamer. In the isolated compound, the ruthenium ions of each monomeric unit have the formal oxidation state Ru III Ru III Ru II .…”

Superparamagnetic Carbon Electrodes: A Versatile Approach for Performing Magnetic Coupled Electrochemical Analysis of Mercury Ions

“…Modifiers can improve electron transfer and help in many cases to prevent surface poisoning and undesirable electrochemical processes. Molecular species, such as the self assembled supramolecular porphyrin films [5][6][7] have been successfully employed as electrode coatings, providing effective electrochemical gates for the detection of analytes such as sulfite, nitrite, ascorbic acid, dopamine and several drugs. Nafion films and polymers have also been extensively employed as electrode modifiers [8,9].…”

Electrocatalytic oxidation of methanol by the [Ru3O(OAc)6(py)2(CH3OH)]3+cluster: improving the metal-ligand electron transfer by accessing the higher oxidation states of a multicentered system

“…1 In this sense, the development of new electrocatalysts based on transition metal complexes has been pursued with great interest, because of their wide range of redox potentials, and variety of active centers in association with low reorganization barriers for electron transfer. [2][3][4][5] A typical case of efficient transition metal electrocatalysis has been reported for the oxidation of 4-substituted-1,2-dimethoxybenzenes, in the presence of iron(II)polyimine catalysts. 6 In this regard, we have investigated the catalytic properties of ruthenium carboxylate clusters of the type [Ru 3 O(OAc) 6 (py) 2 L] n+ in the oxidation of organic compounds 7,8 (OAc = CH 3 CO 2 -, py = pyridine).…”