Synthesis, structure and electrochemistry of mononuclear and dinuclear ruthenium–thiophenecarboxylate complexes

Synthesis and electrochemical characterization of new ruthenium–terthiophene complexes

“…2A) and 3.45 eV 2 (Fig. 2B), corroborating previous reports found in the literature for terthiophene [25]. The results also showed that incorporation of both complexes provokes no changes in the monomer, enabling thus its polymerization, which will be corroborated by electrochemical oxidation of these species in solution.…”

“…Diaz et al [38] reported a strong absorption at 350 nm for terthiophene and, if these absorptions are compared, it is possible to see how the inclusion of terthiophene into the structure of a ruthenium complex may be generating the overlapping absorption spectrum of terthiophene and, in turn, a shift for both 1 and 2, the latter being higher in energy, probably due to the presence of methyl groups on complex 2 and, therefore, the formation of a complex bearing a more positive charge. This may justify the slight shift of one band relative to the other in the near UV spectrum [25,39]. The molar absorptivity (e) recorded for complexes 1 and 2 was 1.1 Â 10 4 and 1.7 Â 10 4 molÁL À1 Ácm À1 , respectively.…”

“…porphyrins [8][9][10], ferrocene [11][12][13], crown ether [14][15][16], Schiff base [17][18][19] and bipyridine [20][21][22], are known. However, very few have incorporated a thiophene group or derivative into its structure [23][24][25][26].…”

Metal‐containing Polymers via Electropolymerization

“…Mono‐ and dinuclear ruthenium(II) carboxylate complexes possessing thiophenes were reported by the group of Aquino, but only the derivatives with bithiophene units were able to undergo anodic polymerization 71. Wolf and co‐workers prepared gold(I) complexes bearing phosphine and acetylide ligands with terthiophene moieties, which enabled electropolymerization 72.…”

Aqua(2,2′-bipyridine-κ2N,N′)[2-(3-thienyl)malonato-κ2O,O′]zinc(II) dihydrate

“…For general background to organic heterocycles, see: Lin et al (2008); Jin et al (2001). For related thiophenemalonate complexes, see: He et al (2009); Murray et al (2008); Huang et al (2009); Lim et al (2006). For hydrogen-bonded rings in polymeric complexes, see: Eppel & Bernstein (2009); Etter (1990); Nichol & Clegg (2009).…”