IQUIFIB 02644
INSTITUTO DE QUIMICA Y FISICOQUIMICA BIOLOGICAS "PROF. ALEJANDRO C. PALADINI"
Unidad Ejecutora - UE
artículos
Título:
Paper
Autor/es:
ANA L. RINALDI; ROMINA CARBALLO; IRENE N. REZZANO
Revista:
ELECTROCHIMICA ACTA
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2016 vol. 222 p. 1700 - 1708
ISSN:
0013-4686
Resumen:
In this study, heterobimetallicfilms of metalloporphyrins, polyCo(II)PP and polyNi(II)PP, linked withazide (polyCoN3NiPP) were immobilized on a glassy carbon electrode. The intense FTIR absorption bandat 2056 cm1, corresponding to the nasy (N3) of the bridged azide, indicates a m2-coordination mode ofpolyCoN3NiPP. The electrochemical characterization of thefilms clearly shows that the order ofdeposition significantly affects the charge transfer process, correlated to the organized polymericstructure. The linked azide anion shows a reversible wave exclusively in the configuration polyNi(II)PPdeposited over afilm of polyCo(II)PP. The Nyquist plots of this electrode, using Fe(CN)63/Fe(CN) 64 asredox probe, demonstrated a lower Rct and higher Kapp than other configurations. This electrode wasapplied as an impedimetric sensor for sulfite anion.
