Abstract:

A series of oligoaniline-modified mono- and bis-nuclear iron(II) complexes have been synthesized successfully, and their spectroscopic and electrochemical properties have been studied. The metal-to-ligand charge-transfer transition (1MLCT) bands of complexes with oligoaniline groups are considerably red-shifted (converge to 594 nm with increasing chain length) and their intensities become much more intense (approximately 5 times), compared with those of the reported complex [Fe(TPY)2]2+. All complexes show multiplicate redox processes based on the [Fe(TPY)2]2+ core and oligoaniline unit. Their electrochemical behavior can be modulated by changing the chain length and the substituented group in oligoaniline unit.

Key words: terpyridine, iron, oligoaniline, spectroscopy, electrochemistry