Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume -, Issue 23, Pages 3747-3753Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.201402356
Keywords
Iron; Chromophores; Tridentate ligands; N ligands; Carbenes; Photophysics
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Funding
- Universite de Lorraine
- Centre National de la Recherche Scientifique (CNRS)
- Innovation Scientifique et Societale (IS2)
- CNRS
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New heteroleptic iron complexes mixing a terpyridine bearing a protonable pyridyl substituent (pytpy) and a pyridyl carbene ligand (carb) have been prepared and characterised by UV/Vis spectroscopy, cyclic voltammetry and TD-DFT computations. The absorption spectrum of [Fe(carb)(pytpy)](2+) showed a notable redshift compared with the homoleptic [Fe(carb)(2)](2+) complex. The MLCT transition occurred at even lower energy when the pendant pyridine was protonated, leading to a wide absorption domain in the 450-650 nm range. Calculations revealed the strong propensity of excited electrons to move from the metal to the pytpy ligand in the complex. This new family of complexes is a promising addition to the arsenal of iron-based chromophores with tuneable electronic properties.
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