Ferrocene- and ruthenocene-containing chalcones: A spectroscopic and electrochemical study
作者:Elizabeth Erasmus
DOI:10.1016/j.ica.2011.08.024
日期:2011.11
Chalcones of the type Mc-CO-CH=CH-Ph, Ph-CO-CH=CH-Mc and Mc-CO-CH=CH-Mc with Mc = Fc = ferrocenyl or Rc = ruthenocenyl, and Ph = phenyl were synthesized. Synthesis was achieved by base catalyzed Claisen-Schmidt condensation of the appropriated acetyl and aldehyde in ethanol. Cyclic voltammetry in CH3CN in the presence of 0.1 moldm (3) [N(Bu)(4)][PF6] revealed chemical and electrochemical reversible behaviour for the Fc/Fc(+) couple and irreversible electrochemistry for the two electron Rc/Rc(2+) couple. The potential ranges for the Fc/Fc(+) couple varied in the range 138 <= E-o' <= 302 mV while E-pa for Rc/Rc(2+) couple was between 358 and 510 mV vs. FcH/FcH(+), the internal standard. Chalcones with the carbonyl group adjacent to the metallocene, are more difficult to oxidize. (C) 2011 Elsevier B.V. All rights reserved.