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Electrochemical and Complexation Studies of Ferrocenyl Complexes Bearing Terpyridine or Phenanthroline Ligands
Author(s) -
Moutet JeanClaude,
SaintAman Eric,
Royal Guy,
Tingry Sophie,
Ziessel Raymond
Publication year - 2002
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200203)2002:3<692::aid-ejic692>3.0.co;2-j
Subject(s) - chemistry , terpyridine , phenanthroline , electrochemistry , bearing (navigation) , combinatorial chemistry , polymer chemistry , inorganic chemistry , organic chemistry , metal , electrode , cartography , geography
The coordinative properties of 1,1′‐bis(phen)‐ and bis(terpy)carboxyester‐bridged derivatives of ferrocene L 1 and L 2 (phen refers to 2,9‐substituted‐1,10‐phenanthroline; terpy refers to 4′‐substituted‐2,2′:6′,2"‐terpyridine) towards various transition metal cations have been investigated by a combination of cyclic voltammetry, mass spectrometry and 1 H NMR spectroscopy. These novel redox receptors form 1:1 ligand:metal complexes with all the surveyed metal cations (L 1 : M = Cu I , Ni II , Fe II , Hg II ; L 2 : M = Ni II , Fe II , Hg II ). Particular attention was paid to the recognition properties of these redox‐active ligands, as monitored by the modulation of the potential of the ferrocene/ferricinium (Fc/Fc + ) couple upon complexation. Complexation of L 1 gives rise to a new emerging Fc/Fc + redox peak system. In contrast, complexation of L 2 does not alter this redox process appreciably. In addition, decomposition of free L 2 occurs upon oxidation and causes the growth of a film of an Fe‐bis(terpy) complex onto the electrode surface.