Issue 30, 2015

Reversing the relative 3MLCT–3MC order in Fe(ii) complexes using cyclometallating ligands: a computational study aiming at luminescent Fe(ii) complexes

Abstract

Following a computational approach, the use of strongly electron-donating cyclometallating ligands has allowed us to increase the 3MC–3MLCT gap dramatically in Fe(II) bis(tridentate) polypyridine complexes, and eventually to reverse the ordering between these states, yielding a 3MLCT state that is clearly more stable than the 3MC state. Simultaneously, the quintet excited states (5MC and 5MLCT) are displaced away from the region (in terms of geometry and energy) where classical photophysics occur, allowing us to avoid magnetism. The situation is thus similar to that of classical ruthenium polypyridine complexes. This opens the way towards luminescent iron(II) complexes, in particular Fe(II)bis(6-phenyl-2,2′-bipyridine) Fe(NNC)2.

Graphical abstract: Reversing the relative 3MLCT–3MC order in Fe(ii) complexes using cyclometallating ligands: a computational study aiming at luminescent Fe(ii) complexes

Supplementary files

Article information

Article type
Paper
Submitted
27 Mar 2015
Accepted
28 May 2015
First published
28 May 2015

Dalton Trans., 2015,44, 13498-13503

Reversing the relative 3MLCT–3MC order in Fe(II) complexes using cyclometallating ligands: a computational study aiming at luminescent Fe(II) complexes

I. M. Dixon, F. Alary, M. Boggio-Pasqua and J. Heully, Dalton Trans., 2015, 44, 13498 DOI: 10.1039/C5DT01214G

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